Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

3010 lines
91 KiB

5 years ago
//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//
#include "quakedef.h"
#include "lightcache.h"
#include "cmodel_engine.h"
#include "istudiorender.h"
#include "studio_internal.h"
#include "bspfile.h"
#include "cdll_engine_int.h"
#include "tier1/mempool.h"
#include "gl_model_private.h"
#include "r_local.h"
#include "materialsystem/imaterialsystemhardwareconfig.h"
#include "materialsystem/imaterialsystem.h"
#include "materialsystem/imaterial.h"
#include "materialsystem/imaterialvar.h"
#include "l_studio.h"
#include "debugoverlay.h"
#include "worldsize.h"
#include "ispatialpartitioninternal.h"
#include "staticpropmgr.h"
#include "cmodel_engine.h"
#include "icliententitylist.h"
#include "icliententity.h"
#include "enginetrace.h"
#include "client.h"
#include "cl_main.h"
#include "collisionutils.h"
#include "tier0/vprof.h"
#include "filesystem_engine.h"
#include "mathlib/anorms.h"
#include "gl_matsysiface.h"
#include "materialsystem/materialsystem_config.h"
#include "tier2/tier2.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
// EMIT_SURFACE LIGHTS:
//
// Dim emit_surface lights go in the ambient cube because there are a ton of them and they are often so dim that
// they get filtered out by r_worldlightmin.
//
// (Dim) emit_surface lights only get calculated at runtime for static props because static props
// do the full calculation of ambient lighting at runtime instead of using vrad's per-leaf
// calculation. Vrad's calculation includes the emit_surfaces, so if we're NOT using it, then
// we want to include emit_surface lights here.
// this should be prime to make the hash better
#define MAX_CACHE_ENTRY 200
#define MAX_CACHE_BUCKETS MAX_CACHE_ENTRY
// number of bits per grid in x, y, z
#define HASH_GRID_SIZEX 5
#define HASH_GRID_SIZEY 5
#define HASH_GRID_SIZEZ 7
#define LIGHTCACHE_SNAP_EPSILON 0.5f
float Engine_WorldLightDistanceFalloff( const dworldlight_t *wl, const Vector& delta, bool bNoRadiusCheck = false );
float Engine_WorldLightAngle( const dworldlight_t *wl, const Vector& lnormal, const Vector& snormal, const Vector& delta );
#define MAX_LIGHTSTYLE_BITS MAX_LIGHTSTYLES
#define MAX_LIGHTSTYLE_BYTES ( (MAX_LIGHTSTYLE_BITS + 7) / 8 )
static byte g_FrameMissCount = 0;
static int g_FrameIndex = 0;
ConVar lightcache_maxmiss("lightcache_maxmiss","2", FCVAR_CHEAT);
#define NUMRANDOMNORMALS 162
static Vector s_raddir[NUMRANDOMNORMALS] = {
#include "randomnormals.h"
};
static ConVar r_lightcache_numambientsamples( "r_lightcache_numambientsamples", "162", FCVAR_CHEAT,
"number of random directions to fire rays when computing ambient lighting",
true, 1.0f, true, ( float )NUMRANDOMNORMALS );
ConVar r_ambientlightingonly(
"r_ambientlightingonly",
"0",
FCVAR_CHEAT,
"Set this to 1 to light models with only ambient lighting (and no static lighting)." );
ConVar r_oldlightselection("r_oldlightselection", "0", FCVAR_CHEAT, "Set this to revert to HL2's method of selecting lights");
static void ComputeAmbientFromSphericalSamples( const Vector& start,
Vector* lightBoxColor );
//-----------------------------------------------------------------------------
// Cache used to compute which lightcache entries computed this frame
// may be able to be used temporarily for lighting other objects in the
// case where we've got too many new lightcache samples in a single frame
//-----------------------------------------------------------------------------
struct CacheInfo_t
{
int x;
int y;
int z;
int leaf;
};
//-----------------------------------------------------------------------------
// Flags to pass into LightIntensityAndDirectionAtPoint + LightIntensityAndDirectionInBox
//-----------------------------------------------------------------------------
enum LightIntensityFlags_t
{
LIGHT_NO_OCCLUSION_CHECK = 0x1,
LIGHT_NO_RADIUS_CHECK = 0x2,
LIGHT_OCCLUDE_VS_PROPS = 0x4,
LIGHT_IGNORE_LIGHTSTYLE_VALUE = 0x8,
};
//-----------------------------------------------------------------------------
// Lightcache entry
//-----------------------------------------------------------------------------
enum
{
HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE = 0x1,
HACKLIGHTCACHEFLAGS_HASNONSWITCHABLELIGHTSTYLE = 0x2, // flickering lights
HACKLIGHTCACHEFLAGS_HASDONESTATICLIGHTING = 0x4, // for static props
};
struct LightingStateInfo_t
{
float m_pIllum[MAXLOCALLIGHTS];
bool m_LightingStateHasSkylight;
LightingStateInfo_t()
{
memset( this, 0, sizeof( *this ) );
}
void Clear()
{
memset( this, 0, sizeof( *this ) );
}
};
// This holds the shared data between lightcache_t and PropLightcache_t.
// This way, PropLightcache_t can be about half the size, since it doesn't need a bunch of data in lightcache_t.
class CBaseLightCache : public LightingStateInfo_t
{
public:
CBaseLightCache()
{
m_pEnvCubemapTexture = NULL;
memset( m_pLightstyles, 0, sizeof( m_pLightstyles ) );
m_LightingFlags = 0;
m_LastFrameUpdated_LightStyles = -1;
}
bool HasLightStyle()
{
return ( m_LightingFlags & ( HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE | HACKLIGHTCACHEFLAGS_HASNONSWITCHABLELIGHTSTYLE ) ) ? true : false;
}
bool HasSwitchableLightStyle()
{
return ( m_LightingFlags & HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE ) ? true : false;
}
bool HasNonSwitchableLightStyle()
{
return ( m_LightingFlags & HACKLIGHTCACHEFLAGS_HASNONSWITCHABLELIGHTSTYLE ) ? true : false;
}
public:
// cache for static lighting . . never changes after cache creation
// preserved because static prop's color meshes are under cache control
LightingState_t m_StaticLightingState;
// cache for light styles
LightingState_t m_LightStyleLightingState; // This includes m_StaticLightingState
int m_LastFrameUpdated_LightStyles;
LightingState_t m_DynamicLightingState; // This includes m_LightStyleLightingState
int m_LastFrameUpdated_DynamicLighting;
// FIXME: could just use m_LightStyleWorldLights.Count() if we are a static prop
int m_LightingFlags; /* LightCacheFlags_t */
int leaf;
unsigned char m_pLightstyles[MAX_LIGHTSTYLE_BYTES];
// for a dynamic prop, ideally the cache center if valid space, otherwise initial origin
// for a static prop, the provided origin
Vector m_LightingOrigin;
// env_cubemap texture associated with this entry.
ITexture * m_pEnvCubemapTexture;
};
class lightcache_t : public CBaseLightCache
{
public:
lightcache_t()
{
m_LastFrameUpdated_DynamicLighting = -1;
}
public:
// Precalculated for the static lighting from AddWorldLightToLightingState.
dworldlight_t *m_StaticPrecalc_LocalLight[MAXLOCALLIGHTS];
unsigned short m_StaticPrecalc_NumLocalLights;
LightingStateInfo_t m_StaticPrecalc_LightingStateInfo;
// the boxcolor is stored in m_StaticLightingState.
// bucket singly linked list.
unsigned short next; // index into lightcache
unsigned short bucket; // index into lightbuckets
// lru links
unsigned short lru_prev;
unsigned short lru_next;
int x,y,z;
};
struct PropLightcache_t : public CBaseLightCache
{
public:
// Linked into s_pAllStaticProps.
PropLightcache_t *m_pNextPropLightcache;
unsigned int m_Flags; // corresponds to LIGHTCACHEFLAGS_*
// stuff for pushing lights onto static props
int m_DLightActive; // bit field for which dlights currently affect us.
// recomputed by AddDlightsForStaticProps
int m_DLightMarkFrame; // last frame in which a dlight was marked on this prop (helps detect lights that are marked but have moved away from this prop)
CUtlVector<short> m_LightStyleWorldLights; // This is a list of lights that affect this static prop cache entry.
int m_SwitchableLightFrame; // This is the last frame that switchable lights were calculated.
Vector mins; // fixme: make these smaller
Vector maxs; // fixme: make these smaller
bool HasDlights() { return m_DLightActive ? true : false; }
PropLightcache_t()
{
m_Flags = 0;
m_SwitchableLightFrame = -1;
m_DLightActive = 0;
m_DLightMarkFrame = 0;
}
};
ConVar r_worldlights ("r_worldlights", "4", 0, "number of world lights to use per vertex" );
ConVar r_radiosity ("r_radiosity", "4", FCVAR_CHEAT, "0: no radiosity\n1: radiosity with ambient cube (6 samples)\n2: radiosity with 162 samples\n3: 162 samples for static props, 6 samples for everything else" );
ConVar r_worldlightmin ("r_worldlightmin", "0.0002" );
ConVar r_avglight ("r_avglight", "1", FCVAR_CHEAT);
static ConVar r_drawlightcache ("r_drawlightcache", "0", FCVAR_CHEAT, "0: off\n1: draw light cache entries\n2: draw rays\n");
static ConVar r_minnewsamples ("r_minnewsamples", "3");
static ConVar r_maxnewsamples ("r_maxnewsamples", "6");
static ConVar r_maxsampledist ("r_maxsampledist", "128");
static ConVar r_lightcachecenter ("r_lightcachecenter", "1", FCVAR_CHEAT );
// head and tail sentinels of the LRU
#define LIGHT_LRU_HEAD_INDEX MAX_CACHE_ENTRY
#define LIGHT_LRU_TAIL_INDEX (MAX_CACHE_ENTRY+1)
static lightcache_t lightcache[MAX_CACHE_ENTRY + 2]; // the extra 2 are the head and tail
static unsigned short lightbuckets[MAX_CACHE_BUCKETS];
static CClassMemoryPool<PropLightcache_t> s_PropCache( 256, CClassMemoryPool<lightcache_t>::GROW_SLOW );
// A memory pool of lightcache entries that is
static int cached_r_worldlights = -1;
static int cached_r_radiosity = -1;
static int cached_r_avglight = -1;
static int cached_mat_fullbright = -1;
static int cached_r_lightcache_numambientsamples = -1;
static PropLightcache_t* s_pAllStaticProps = NULL;
// Used to convert RGB colors to greyscale intensity
static Vector s_Grayscale( 0.299f, 0.587f, 0.114f );
#define BIT_SET( a, b ) ((a)[(b)>>3] & (1<<((b)&7)))
inline unsigned short GetLightCacheIndex( const lightcache_t *pCache )
{
return pCache - lightcache;
}
inline lightcache_t& GetLightLRUHead()
{
return lightcache[LIGHT_LRU_HEAD_INDEX];
}
inline lightcache_t& GetLightLRUTail()
{
return lightcache[LIGHT_LRU_TAIL_INDEX];
}
//-----------------------------------------------------------------------------
// Purpose: Set up the LRU
//-----------------------------------------------------------------------------
void R_StudioInitLightingCache( void )
{
unsigned short i;
memset( lightcache, 0, sizeof(lightcache) );
for ( i=0; i < ARRAYSIZE( lightcache ); i++ )
lightcache[i].bucket = 0xFFFF;
for ( i=0; i < ARRAYSIZE( lightbuckets ); i++ )
lightbuckets[i] = 0xFFFF;
unsigned short last = LIGHT_LRU_HEAD_INDEX;
// Link every node into the LRU
for ( i = 0; i < MAX_CACHE_ENTRY-1; i++)
{
lightcache[i].lru_prev = last;
lightcache[i].lru_next = i + 1;
last = i;
}
// terminate the lru list
lightcache[i].lru_prev = last;
lightcache[i].lru_next = LIGHT_LRU_TAIL_INDEX;
// link the sentinels
lightcache[LIGHT_LRU_HEAD_INDEX].lru_next = 0;
lightcache[LIGHT_LRU_TAIL_INDEX].lru_prev = i;
// Lower number of lights on older hardware
if ( g_pMaterialSystemHardwareConfig->MaxNumLights() < r_worldlights.GetInt() )
{
r_worldlights.SetValue( g_pMaterialSystemHardwareConfig->MaxNumLights() );
}
cached_r_worldlights = r_worldlights.GetInt();
cached_r_radiosity = r_radiosity.GetInt();
cached_r_avglight = r_avglight.GetInt();
cached_mat_fullbright = g_pMaterialSystemConfig->nFullbright;
cached_r_lightcache_numambientsamples = r_lightcache_numambientsamples.GetInt();
// Recompute all static lighting
InvalidateStaticLightingCache();
}
void R_StudioCheckReinitLightingCache()
{
// Make sure this stays clamped to match hardware capabilities
if ( g_pMaterialSystemHardwareConfig->MaxNumLights() < r_worldlights.GetInt() )
{
r_worldlights.SetValue( g_pMaterialSystemHardwareConfig->MaxNumLights() );
}
// Flush the lighting cache, if necessary
if (cached_r_worldlights != r_worldlights.GetInt() ||
cached_r_radiosity != r_radiosity.GetInt() ||
cached_r_avglight != r_avglight.GetInt() ||
cached_mat_fullbright != g_pMaterialSystemConfig->nFullbright ||
cached_r_lightcache_numambientsamples != r_lightcache_numambientsamples.GetInt() )
{
R_StudioInitLightingCache();
}
}
//-----------------------------------------------------------------------------
// Purpose: Moves this cache entry to the end of the lru, i.e. marks it recently used
// Input : *pcache -
//-----------------------------------------------------------------------------
static void LightcacheMark( lightcache_t *pcache )
{
// don't link in static lighting
if ( !pcache->lru_next && !pcache->lru_prev )
return;
// already at tail
if ( GetLightCacheIndex( pcache ) == lightcache[LIGHT_LRU_TAIL_INDEX].lru_prev )
return;
// unlink pcache
lightcache[pcache->lru_prev].lru_next = pcache->lru_next;
lightcache[pcache->lru_next].lru_prev = pcache->lru_prev;
// link to tail
// patch backward link
lightcache[GetLightLRUTail().lru_prev].lru_next = GetLightCacheIndex( pcache );
pcache->lru_prev = GetLightLRUTail().lru_prev;
// patch forward link
pcache->lru_next = LIGHT_LRU_TAIL_INDEX;
GetLightLRUTail().lru_prev = GetLightCacheIndex( pcache );
}
//-----------------------------------------------------------------------------
// Purpose: Unlink a cache entry from its current bucket
// Input : *pcache -
//-----------------------------------------------------------------------------
static void LightcacheUnlink( lightcache_t *pcache )
{
unsigned short iBucket = pcache->bucket;
// not used yet?
if ( iBucket == 0xFFFF )
return;
unsigned short iCache = GetLightCacheIndex( pcache );
// unlink it
unsigned short plist = lightbuckets[iBucket];
if ( plist == iCache )
{
// head of bucket? move bucket down
lightbuckets[iBucket] = pcache->next;
}
else
{
bool found = false;
// walk the bucket
while ( plist != 0xFFFF )
{
// if next is pcache, unlink pcache
if ( lightcache[plist].next == iCache )
{
lightcache[plist].next = pcache->next;
found = true;
break;
}
plist = lightcache[plist].next;
}
assert(found);
}
}
//-----------------------------------------------------------------------------
// Purpose: Get the least recently used cache entry
//-----------------------------------------------------------------------------
static lightcache_t *LightcacheGetLRU( void )
{
// grab head
lightcache_t *pcache = &lightcache[GetLightLRUHead().lru_next];
// move to tail
LightcacheMark( pcache );
// unlink from the bucket
LightcacheUnlink( pcache );
pcache->leaf = -1;
return pcache;
}
//-----------------------------------------------------------------------------
// Purpose: Quick & Dirty hashing function to bucket the cube in 4d parameter space
//-----------------------------------------------------------------------------
static int LightcacheHashKey( int x, int y, int z, int leaf )
{
unsigned int key = (((x<<20) + (y<<8) + z) ^ (leaf));
key = key % MAX_CACHE_BUCKETS;
return (int)key;
}
//-----------------------------------------------------------------------------
// Compute the lightcache bucket given a position
//-----------------------------------------------------------------------------
static lightcache_t* FindInCache( int bucket, int x, int y, int z, int leaf )
{
// loop over the entries in this bucket
unsigned short iCache;
for ( iCache = lightbuckets[bucket]; iCache != 0xFFFF; iCache = lightcache[iCache].next )
{
lightcache_t *pCache = &lightcache[iCache];
// hit?
if (pCache->x == x && pCache->y == y && pCache->z == z && pCache->leaf == leaf )
{
return pCache;
}
}
return 0;
}
//-----------------------------------------------------------------------------
// Links to a bucket
//-----------------------------------------------------------------------------
static inline void LinkToBucket( int bucket, lightcache_t* pcache )
{
pcache->next = lightbuckets[bucket];
lightbuckets[bucket] = GetLightCacheIndex( pcache );
// point back to the bucket
pcache->bucket = (unsigned short)bucket;
}
//-----------------------------------------------------------------------------
// Links in a new lightcache entry
//-----------------------------------------------------------------------------
static lightcache_t* NewLightcacheEntry( int bucket )
{
// re-use the LRU cache entry
lightcache_t* pcache = LightcacheGetLRU();
LinkToBucket( bucket, pcache );
return pcache;
}
//-----------------------------------------------------------------------------
// Compute the lightcache origin
//-----------------------------------------------------------------------------
#if 0
static inline void ComputeLightcacheOrigin( int x, int y, int z, Vector& org )
{
// this is suspicious and *maybe* wrong
// the bucket origin can't re-establish the correct negative numbers
// because of the non-arithmetic shift down?
int ix = x << HASH_GRID_SIZEX;
int iy = y << HASH_GRID_SIZEY;
int iz = z << HASH_GRID_SIZEZ;
org.Init( ix, iy, iz );
}
#endif
//-----------------------------------------------------------------------------
// Compute the lightcache bounds given a point
//-----------------------------------------------------------------------------
void ComputeLightcacheBounds( const Vector &vecOrigin, Vector *pMins, Vector *pMaxs )
{
bool bXPos = (vecOrigin[0] >= 0);
bool bYPos = (vecOrigin[1] >= 0);
bool bZPos = (vecOrigin[2] >= 0);
// can't snap and shift negative values
// truncate positive number and shift
int ix = ((int)(fabs(vecOrigin[0]))) >> HASH_GRID_SIZEX;
int iy = ((int)(fabs(vecOrigin[1]))) >> HASH_GRID_SIZEY;
int iz = ((int)(fabs(vecOrigin[2]))) >> HASH_GRID_SIZEZ;
// mins is floored as fixup depending on <0 or >0
pMins->x = (bXPos ? ix : -(ix + 1)) << HASH_GRID_SIZEX;
pMins->y = (bYPos ? iy : -(iy + 1)) << HASH_GRID_SIZEY;
pMins->z = (bZPos ? iz : -(iz + 1)) << HASH_GRID_SIZEZ;
// maxs is exactly one grid increasing from mins
pMaxs->x = pMins->x + (1 << HASH_GRID_SIZEX );
pMaxs->y = pMins->y + (1 << HASH_GRID_SIZEY );
pMaxs->z = pMins->z + (1 << HASH_GRID_SIZEZ );
Assert( (pMins->x <= vecOrigin.x) && (pMins->y <= vecOrigin.y) && (pMins->z <= vecOrigin.z) );
Assert( (pMaxs->x >= vecOrigin.x) && (pMaxs->y >= vecOrigin.y) && (pMaxs->z >= vecOrigin.z) );
}
//-----------------------------------------------------------------------------
// Compute the cache origin suitable for key
//-----------------------------------------------------------------------------
static inline void OriginToCacheOrigin( const Vector &origin, int &x, int &y, int &z )
{
x = ((int)origin[0] + 32768) >> HASH_GRID_SIZEX;
y = ((int)origin[1] + 32768) >> HASH_GRID_SIZEY;
z = ((int)origin[2] + 32768) >> HASH_GRID_SIZEZ;
}
//-----------------------------------------------------------------------------
// Finds ambient lights
//-----------------------------------------------------------------------------
dworldlight_t* FindAmbientLight()
{
// find any ambient lights
for (int i = 0; i < host_state.worldbrush->numworldlights; i++)
{
if (host_state.worldbrush->worldlights[i].type == emit_skyambient)
{
return &host_state.worldbrush->worldlights[i];
}
}
return 0;
}
//-----------------------------------------------------------------------------
// Computes the ambient term from a particular surface
//-----------------------------------------------------------------------------
static void ComputeAmbientFromSurface( SurfaceHandle_t surfID, dworldlight_t* pSkylight,
Vector& radcolor )
{
if (IS_SURF_VALID( surfID ) )
{
// If we hit the sky, use the sky ambient
if (MSurf_Flags( surfID ) & SURFDRAW_SKY)
{
if (pSkylight)
{
// add in sky ambient
VectorCopy( pSkylight->intensity, radcolor );
}
}
else
{
Vector reflectivity;
MSurf_TexInfo( surfID )->material->GetReflectivity( reflectivity );
VectorMultiply( radcolor, reflectivity, radcolor );
}
}
}
//-----------------------------------------------------------------------------
// Computes the ambient term from a large number of spherical samples
//-----------------------------------------------------------------------------
static void ComputeAmbientFromSphericalSamples( const Vector& start,
Vector* lightBoxColor )
{
VPROF( "ComputeAmbientFromSphericalSamples" );
// find any ambient lights
dworldlight_t *pSkylight = FindAmbientLight();
Vector radcolor[NUMRANDOMNORMALS];
Assert( cached_r_lightcache_numambientsamples <= ARRAYSIZE( radcolor ) );
// sample world by casting N rays distributed across a sphere
Vector upend;
int i;
for ( i = 0; i < cached_r_lightcache_numambientsamples; i++)
{
// FIXME: a good optimization would be to scale this per leaf
VectorMA( start, COORD_EXTENT * 1.74, g_anorms[i], upend );
// Now that we've got a ray, see what surface we've hit
SurfaceHandle_t surfID = R_LightVec (start, upend, false, radcolor[i] );
if (!IS_SURF_VALID(surfID) )
continue;
ComputeAmbientFromSurface( surfID, pSkylight, radcolor[i] );
}
// accumulate samples into radiant box
const Vector* pBoxDirs = g_pStudioRender->GetAmbientLightDirections();
for (int j = g_pStudioRender->GetNumAmbientLightSamples(); --j >= 0; )
{
float c, t;
t = 0;
lightBoxColor[j][0] = 0;
lightBoxColor[j][1] = 0;
lightBoxColor[j][2] = 0;
for (i = 0; i < cached_r_lightcache_numambientsamples; i++)
{
c = DotProduct( g_anorms[i], pBoxDirs[j] );
if (c > 0)
{
t += c;
VectorMA( lightBoxColor[j], c, radcolor[i], lightBoxColor[j] );
}
}
VectorMultiply( lightBoxColor[j], 1/t, lightBoxColor[j] );
}
}
static void ComputeAmbientFromLeaf( const Vector &start, int leafID, Vector *lightBoxColor, bool *bAddedLeafAmbientCube )
{
if( leafID >= 0 )
{
Mod_LeafAmbientColorAtPos( lightBoxColor, start, leafID );
// The ambient lighting in the leaves has the emit_surface lights factored in.
*bAddedLeafAmbientCube = true;
}
else
{
int i;
for( i = 0; i < 6; i++ )
{
lightBoxColor[i].Init( 0.0f, 0.0f, 0.0f );
}
}
}
//-----------------------------------------------------------------------------
// Computes the ambient term from 6 cardinal directions
//-----------------------------------------------------------------------------
static void ComputeAmbientFromAxisAlignedSamples( const Vector& start,
Vector* lightBoxColor )
{
Vector upend;
// find any ambient lights
dworldlight_t *pSkylight = FindAmbientLight();
// sample world only along cardinal axes
const Vector* pBoxDirs = g_pStudioRender->GetAmbientLightDirections();
for (int i = 0; i < 6; i++)
{
VectorMA( start, COORD_EXTENT * 1.74, pBoxDirs[i], upend );
// Now that we've got a ray, see what surface we've hit
SurfaceHandle_t surfID = R_LightVec (start, upend, false, lightBoxColor[i] );
if (!IS_SURF_VALID( surfID ) )
continue;
ComputeAmbientFromSurface( surfID, pSkylight, lightBoxColor[i] );
}
}
//-----------------------------------------------------------------------------
// Computes the ambient lighting at a point, and sets the lightstyles bitfield
//-----------------------------------------------------------------------------
static void R_StudioGetAmbientLightForPoint(
int leafID,
const Vector& start,
Vector* pLightBoxColor,
bool bIsStaticProp,
bool *bAddedLeafAmbientCube )
{
*bAddedLeafAmbientCube = false;
VPROF( "R_StudioGetAmbientLightForPoint" );
int i;
if ( g_pMaterialSystemConfig->nFullbright == 1 )
{
for (i = g_pStudioRender->GetNumAmbientLightSamples(); --i >= 0; )
{
VectorFill( pLightBoxColor[i], 1.0 );
}
return;
}
switch( r_radiosity.GetInt() )
{
case 1:
ComputeAmbientFromAxisAlignedSamples( start, pLightBoxColor );
break;
case 2:
ComputeAmbientFromSphericalSamples( start, pLightBoxColor );
break;
case 3:
if (bIsStaticProp)
ComputeAmbientFromSphericalSamples( start, pLightBoxColor );
else
ComputeAmbientFromAxisAlignedSamples( start, pLightBoxColor );
break;
case 4:
if (bIsStaticProp)
ComputeAmbientFromSphericalSamples( start, pLightBoxColor );
else
ComputeAmbientFromLeaf( start, leafID, pLightBoxColor, bAddedLeafAmbientCube );
break;
default:
// assume no bounced light from the world
for (i = g_pStudioRender->GetNumAmbientLightSamples(); --i >= 0; )
{
VectorFill( pLightBoxColor[i], 0 );
}
}
}
//-----------------------------------------------------------------------------
// This filter bumps against the world + all but one prop
//-----------------------------------------------------------------------------
class CTraceFilterWorldAndProps : public ITraceFilter
{
public:
CTraceFilterWorldAndProps( IHandleEntity *pHandleEntity ) : m_pIgnoreProp( pHandleEntity ) {}
bool ShouldHitEntity( IHandleEntity *pHandleEntity, int contentsMask )
{
// We only bump against props + we ignore one particular prop
if ( !StaticPropMgr()->IsStaticProp( pHandleEntity ) )
return false;
return ( pHandleEntity != m_pIgnoreProp );
}
virtual TraceType_t GetTraceType() const
{
return TRACE_EVERYTHING_FILTER_PROPS;
}
private:
IHandleEntity *m_pIgnoreProp;
};
static float LightIntensityAndDirectionAtPointOld( dworldlight_t* pLight,
const Vector& mid, int fFlags, IHandleEntity *pIgnoreEnt, Vector *pDirection )
{
CTraceFilterWorldOnly worldTraceFilter;
CTraceFilterWorldAndProps propTraceFilter( pIgnoreEnt );
ITraceFilter *pTraceFilter = &worldTraceFilter;
if (fFlags & LIGHT_OCCLUDE_VS_PROPS)
{
pTraceFilter = &propTraceFilter;
}
// Special case lights
switch (pLight->type)
{
case emit_skylight:
{
// There can be more than one skylight, but we should only
// ever be affected by one of them (multiple ones are created from
// a single light in vrad)
VectorFill( *pDirection, 0 );
// check to see if you can hit the sky texture
Vector end;
VectorMA( mid, -COORD_EXTENT * 1.74f, pLight->normal, end ); // max_range * sqrt(3)
trace_t tr;
Ray_t ray;
ray.Init( mid, end );
g_pEngineTraceClient->TraceRay( ray, MASK_OPAQUE, pTraceFilter, &tr );
// Here, we didn't hit the sky, so we must be in shadow
if ( !(tr.surface.flags & SURF_SKY) )
return 0.0f;
// fudge delta and dist for skylights
*pDirection = -pLight->normal;
return 1.0f;
}
case emit_skyambient:
// always ignore these
return 0.0f;
}
// all other lights
// check distance
VectorSubtract( pLight->origin, mid, *pDirection );
float ratio = Engine_WorldLightDistanceFalloff( pLight, *pDirection, (fFlags & LIGHT_NO_RADIUS_CHECK) != 0 );
// Add in light style component
if( !( fFlags & LIGHT_IGNORE_LIGHTSTYLE_VALUE ) )
{
ratio *= LightStyleValue( pLight->style );
}
// Early out for really low-intensity lights
// That way we don't need to ray-cast or normalize
float intensity = max( pLight->intensity[0], pLight->intensity[1] );
intensity = max(intensity, pLight->intensity[2] );
// This is about 1/256
// See the comment titled "EMIT_SURFACE LIGHTS" at the top for info about why we don't
// test emit_surface lights here.
if ( pLight->type != emit_surface )
{
if (intensity * ratio < r_worldlightmin.GetFloat() )
return 0.0f;
}
float dist = VectorNormalize( *pDirection );
if ( fFlags & LIGHT_NO_OCCLUSION_CHECK )
return ratio;
trace_t pm;
Ray_t ray;
ray.Init( mid, pLight->origin );
g_pEngineTraceClient->TraceRay( ray, MASK_OPAQUE, pTraceFilter, &pm );
// hack
if ( (1.f-pm.fraction) * dist > 8 )
{
#ifndef SWDS
if (r_drawlightcache.GetInt() == 2)
{
CDebugOverlay::AddLineOverlay( mid, pm.endpos, 255, 0, 0, 255, true, 3 );
}
#endif
return 0.f;
}
return ratio;
}
//-----------------------------------------------------------------------------
// This method returns the effective intensity of a light as seen from
// a particular point. PVS is used to speed up the task.
//-----------------------------------------------------------------------------
static float LightIntensityAndDirectionAtPointNew( dworldlight_t* pLight, lightzbuffer_t *pZBuf,
const Vector& mid, int fFlags, IHandleEntity *pIgnoreEnt, Vector *pDirection )
{
CTraceFilterWorldOnly worldTraceFilter;
CTraceFilterWorldAndProps propTraceFilter( pIgnoreEnt );
ITraceFilter *pTraceFilter = &worldTraceFilter;
if (fFlags & LIGHT_OCCLUDE_VS_PROPS)
{
pTraceFilter = &propTraceFilter;
}
// Special case lights
switch (pLight->type)
{
case emit_skylight:
{
// There can be more than one skylight, but we should only
// ever be affected by one of them (multiple ones are created from
// a single light in vrad)
VectorFill( *pDirection, 0 );
// check to see if you can hit the sky texture
Vector end;
VectorMA( mid, -COORD_EXTENT * 1.74f, pLight->normal, end ); // max_range * sqrt(3)
trace_t tr;
Ray_t ray;
ray.Init( mid, end );
g_pEngineTraceClient->TraceRay( ray, MASK_OPAQUE, pTraceFilter, &tr );
// Here, we didn't hit the sky, so we must be in shadow
if ( !(tr.surface.flags & SURF_SKY) )
return 0.0f;
// fudge delta and dist for skylights
*pDirection = -pLight->normal;
return 1.0f;
}
case emit_skyambient:
// always ignore these
return 0.0f;
}
// all other lights
// check distance
VectorSubtract( pLight->origin, mid, *pDirection );
float ratio = Engine_WorldLightDistanceFalloff( pLight, *pDirection, (fFlags & LIGHT_NO_RADIUS_CHECK) != 0 );
// Add in light style component
if( !( fFlags & LIGHT_IGNORE_LIGHTSTYLE_VALUE ) )
{
ratio *= LightStyleValue( pLight->style );
}
// Early out for really low-intensity lights
// That way we don't need to ray-cast or normalize
float intensity = fpmax( pLight->intensity[0], pLight->intensity[1] );
intensity = fpmax(intensity, pLight->intensity[2] );
// This is about 1/256
// See the comment titled "EMIT_SURFACE LIGHTS" at the top for info about why we don't
// test emit_surface lights here.
if ( pLight->type != emit_surface )
{
if (intensity * ratio < r_worldlightmin.GetFloat() )
return 0.0f;
}
float dist = VectorNormalize( *pDirection );
if ( fFlags & LIGHT_NO_OCCLUSION_CHECK )
return ratio;
float flTraceDistance = dist;
// check if we are so close to the light that we shouldn't use our coarse z buf
if ( dist - ( 1 << HASH_GRID_SIZEZ ) < 8 * SHADOW_ZBUF_RES )
pZBuf = NULL;
Vector epnt = mid;
LightShadowZBufferSample_t *pSample = NULL;
if ( pZBuf )
{
pSample = &( pZBuf->GetSample( *pDirection ) );
if ( ( pSample->m_flHitDistance < pSample->m_flTraceDistance ) || ( pSample->m_flTraceDistance >= dist ) )
{
// hit!
if ( dist > pSample->m_flHitDistance + 8 ) // shadow hit
{
#ifndef SWDS
if (r_drawlightcache.GetInt() == 2 )
{
CDebugOverlay::AddLineOverlay( mid, pLight->origin, 0, 0, 0, 255, true, 3 );
}
#endif
return 0;
}
else
{
#ifndef SWDS
if (r_drawlightcache.GetInt() == 2 )
{
CDebugOverlay::AddLineOverlay( mid, pLight->origin, 0, 255, 0, 255, true, 3 );
}
#endif
return ratio;
}
}
// cache miss
flTraceDistance = max( 100.0, 2.0 * dist ); // trace a little further for better caching
epnt += ( dist - flTraceDistance ) * ( *pDirection );
}
trace_t pm;
Ray_t ray;
ray.Init( pLight->origin, epnt ); // trace from light to object
g_pEngineTraceClient->TraceRay( ray, MASK_OPAQUE, pTraceFilter, &pm );
float flHitDistance = ( pm.startsolid ) ? FLT_EPSILON : ( pm.fraction ) * flTraceDistance;
if ( pSample )
{
pSample->m_flTraceDistance = flTraceDistance;
pSample->m_flHitDistance = ( pm.fraction >= 1.0 ) ? 1.0e23 : flHitDistance;
}
if ( dist > flHitDistance + 8)
{
#ifndef SWDS
if (r_drawlightcache.GetInt() == 2 )
{
CDebugOverlay::AddLineOverlay( mid, pLight->origin, 255, 0, 0, 255, true, 3 );
}
#endif
return 0.f;
}
return ratio;
}
static float LightIntensityAndDirectionAtPoint( dworldlight_t* pLight, lightzbuffer_t *pZBuf,
const Vector& mid, int fFlags, IHandleEntity *pIgnoreEnt, Vector *pDirection )
{
if ( pZBuf )
return LightIntensityAndDirectionAtPointNew( pLight, pZBuf, mid, fFlags, pIgnoreEnt, pDirection );
else
return LightIntensityAndDirectionAtPointOld( pLight, mid, fFlags, pIgnoreEnt, pDirection );
#if 0
float old = LightIntensityAndDirectionAtPointOld( pLight, mid, fFlags, pIgnoreEnt, pDirection );
float newf = LightIntensityAndDirectionAtPointNew( pLight, pZBuf, mid, fFlags, pIgnoreEnt, pDirection );
if ( old != newf )
{
float old2 = LightIntensityAndDirectionAtPointOld( pLight, mid, fFlags, pIgnoreEnt, pDirection );
float newf2 = LightIntensityAndDirectionAtPointNew( pLight, pZBuf, mid, fFlags, pIgnoreEnt, pDirection );
}
return newf;
#endif
}
//-----------------------------------------------------------------------------
// This method returns the effective intensity of a light as seen within
// a particular box...
// a particular point. PVS is used to speed up the task.
//-----------------------------------------------------------------------------
static float LightIntensityAndDirectionInBox( dworldlight_t* pLight,
lightzbuffer_t *pZBuf,
const Vector &mid, const Vector &mins, const Vector &maxs, int fFlags,
Vector *pDirection )
{
// Choose the point closest on the box to the light to get max intensity
// within the box....
if ( !r_oldlightselection.GetBool() )
{
switch (pLight->type)
{
case emit_spotlight: // directional & positional
{
float sphereRadius = (maxs-mid).Length();
// first do a sphere/sphere check
float dist = (pLight->origin - mid).Length();
if ( dist > (sphereRadius + pLight->radius) )
return 0;
// PERFORMANCE: precalc this and store in the light?
float angle = acos(pLight->stopdot2);
float sinAngle = sin(angle);
if ( !IsSphereIntersectingCone( mid, sphereRadius, pLight->origin, pLight->normal, sinAngle, pLight->stopdot2 ) )
return 0;
}
// NOTE: fall through to radius check in point case
case emit_point:
{
float distSqr = CalcSqrDistanceToAABB( mins, maxs, pLight->origin );
if ( distSqr > pLight->radius * pLight->radius )
return 0;
}
break;
case emit_surface: // directional & positional, fixed cone size
{
float sphereRadius = (maxs-mid).Length();
// first do a sphere/sphere check
float dist = (pLight->origin - mid).Length();
if ( dist > (sphereRadius + pLight->radius) )
return 0;
// PERFORMANCE: precalc this and store in the light?
if ( !IsSphereIntersectingCone( mid, sphereRadius, pLight->origin, pLight->normal, 1.0f, 0.0f ) )
return 0;
}
break;
}
}
else
{
// NOTE: Here, we do radius check to check to see if we should even care about the light
// because we want to check the closest point in the box
switch (pLight->type)
{
case emit_point:
case emit_spotlight: // directional & positional
{
Vector vecClosestPoint;
vecClosestPoint.Init();
for ( int i = 0; i < 3; ++i )
{
vecClosestPoint[i] = clamp( pLight->origin[i], mins[i], maxs[i] );
}
vecClosestPoint -= pLight->origin;
if ( vecClosestPoint.LengthSqr() > pLight->radius * pLight->radius )
return 0;
}
break;
}
}
return LightIntensityAndDirectionAtPoint( pLight, pZBuf, mid, fFlags | LIGHT_NO_RADIUS_CHECK, NULL, pDirection );
}
//-----------------------------------------------------------------------------
// Computes the static vertex lighting term from a large number of spherical samples
//-----------------------------------------------------------------------------
bool ComputeVertexLightingFromSphericalSamples( const Vector& vecVertex,
const Vector &vecNormal, IHandleEntity *pIgnoreEnt, Vector *pLinearColor )
{
if ( IsX360() )
return false;
// Check to see if this vertex is in solid
trace_t tr;
CTraceFilterWorldAndProps filter( pIgnoreEnt );
Ray_t ray;
ray.Init( vecVertex, vecVertex );
g_pEngineTraceClient->TraceRay( ray, MASK_OPAQUE, &filter, &tr );
if ( tr.startsolid || tr.allsolid )
return false;
pLinearColor->Init( 0, 0, 0 );
// find any ambient lights
dworldlight_t *pSkylight = FindAmbientLight();
// sample world by casting N rays distributed across a sphere
float t = 0.0f;
Vector upend, color;
int i;
for ( i = 0; i < cached_r_lightcache_numambientsamples; i++)
{
float flDot = DotProduct( vecNormal, s_raddir[i] );
if ( flDot < 0.0f )
continue;
// FIXME: a good optimization would be to scale this per leaf
VectorMA( vecVertex, COORD_EXTENT * 1.74, s_raddir[i], upend );
// Now that we've got a ray, see what surface we've hit
SurfaceHandle_t surfID = R_LightVec( vecVertex, upend, false, color );
if ( !IS_SURF_VALID(surfID) )
continue;
// FIXME: Maybe make sure we aren't obstructed by static props?
// To do this, R_LightVec would need to return distance of hit...
// Or, we need another arg to R_LightVec to return black when hitting a static prop
ComputeAmbientFromSurface( surfID, pSkylight, color );
t += flDot;
VectorMA( *pLinearColor, flDot, color, *pLinearColor );
}
if (t != 0.0f)
{
*pLinearColor /= t;
}
// Now deal with direct lighting
bool bHasSkylight = false;
// Figure out the PVS info for this location
int leaf = CM_PointLeafnum( vecVertex );
const byte* pVis = CM_ClusterPVS( CM_LeafCluster( leaf ) );
// Now add in the direct lighting
Vector vecDirection;
for (i = 0; i < host_state.worldbrush->numworldlights; ++i)
{
dworldlight_t *wl = &host_state.worldbrush->worldlights[i];
// FIXME: This is sort of a hack; only one skylight is allowed in the
// lighting...
if ((wl->type == emit_skylight) && bHasSkylight)
continue;
// only do it if the entity can see into the lights leaf
if ((wl->cluster < 0) || (!BIT_SET( pVis, wl->cluster )) )
continue;
float flRatio = LightIntensityAndDirectionAtPoint( wl, NULL, vecVertex, LIGHT_OCCLUDE_VS_PROPS, pIgnoreEnt, &vecDirection );
// No light contribution? Get outta here!
if ( flRatio <= 0.0f )
continue;
// Check if we've got a skylight
if ( wl->type == emit_skylight )
bHasSkylight = true;
// Figure out spotlight attenuation
float flAngularRatio = Engine_WorldLightAngle( wl, wl->normal, vecNormal, vecDirection );
// Add in the direct lighting
VectorMAInline( *pLinearColor, flAngularRatio * flRatio, wl->intensity, *pLinearColor );
}
return true;
}
//-----------------------------------------------------------------------------
// Finds the minimum light
//-----------------------------------------------------------------------------
static int FindDarkestWorldLight( int numLights, float* pLightIllum, float newIllum )
{
// FIXME: make the list sorted?
int minLightIndex = -1;
float minillum = newIllum;
for (int j = 0; j < numLights; ++j)
{
// only check ones dimmer than have already been checked
if (pLightIllum[j] < minillum)
{
minillum = pLightIllum[j];
minLightIndex = j;
}
}
return minLightIndex;
}
//-----------------------------------------------------------------------------
// Adds a world light to the ambient cube
//-----------------------------------------------------------------------------
static void AddWorldLightToLightCube( dworldlight_t* pWorldLight,
Vector* pBoxColor,
const Vector& direction,
float ratio )
{
if (ratio == 0.0f)
return;
// add whatever didn't stay in the list to lightBoxColor
// FIXME: This method is a guess, I don't know how it should be done
const Vector* pBoxDir = g_pStudioRender->GetAmbientLightDirections();
for (int j = g_pStudioRender->GetNumAmbientLightSamples(); --j >= 0; )
{
float t = DotProduct( pBoxDir[j], direction );
if (t > 0)
{
VectorMAInline( pBoxColor[j], ratio * t, pWorldLight->intensity, pBoxColor[j] );
}
}
}
//-----------------------------------------------------------------------------
// Adds a world light to the ambient cube
//-----------------------------------------------------------------------------
void AddWorldLightToAmbientCube( dworldlight_t* pWorldLight, const Vector &vecLightingOrigin, AmbientCube_t &ambientCube )
{
Vector vecDirection;
float ratio = LightIntensityAndDirectionAtPoint( pWorldLight, NULL, vecLightingOrigin, 0, NULL, &vecDirection );
float angularRatio = Engine_WorldLightAngle( pWorldLight, pWorldLight->normal, vecDirection, vecDirection );
AddWorldLightToLightCube( pWorldLight, ambientCube, vecDirection, ratio * angularRatio );
}
static inline const byte* FastRejectLightSource(
bool bIgnoreVis,
const byte *pVis,
const Vector &bucketOrigin,
int lightType,
int lightCluster,
bool &bReject )
{
bReject = false;
if( !bIgnoreVis )
{
// This is an optimization to avoid decompressing Vis twice
if (!pVis)
{
// Figure out the PVS info for this location
int bucketOriginLeaf = CM_PointLeafnum( bucketOrigin );
pVis = CM_ClusterPVS( CM_LeafCluster( bucketOriginLeaf ) );
}
if ( lightType == emit_skylight )
{
int bucketOriginLeaf = CM_PointLeafnum( bucketOrigin );
mleaf_t *pLeaf = &host_state.worldbrush->leafs[bucketOriginLeaf];
if ( pLeaf && !( pLeaf->flags & ( LEAF_FLAGS_SKY | LEAF_FLAGS_SKY2D ) ) )
{
bReject = true;
}
}
else
{
if ((lightCluster < 0) || (!BIT_SET( pVis, lightCluster )) )
bReject = true;
}
}
return pVis;
}
//-----------------------------------------------------------------------------
// Adds a world light to the list of lights
//-----------------------------------------------------------------------------
static const byte *AddWorldLightToLightingState( dworldlight_t* pWorldLight,
lightzbuffer_t* pZBuf,
LightingState_t& lightingState, LightingStateInfo_t& info,
const Vector& bucketOrigin, const byte* pVis, bool dynamic = false,
bool bIgnoreVis = false,
bool bIgnoreVisTest = false )
{
Assert( lightingState.numlights >= 0 && lightingState.numlights <= MAXLOCALLIGHTS );
// FIXME: This is sort of a hack; only one skylight is allowed in the
// lighting...
if ((pWorldLight->type == emit_skylight) && info.m_LightingStateHasSkylight)
return pVis;
// only do it if the entity can see into the lights leaf
if ( !bIgnoreVisTest )
{
bool bReject;
pVis = FastRejectLightSource( bIgnoreVis, pVis, bucketOrigin, pWorldLight->type, pWorldLight->cluster, bReject );
if ( bReject )
return pVis;
}
// Get the lighting ratio
Vector direction;
float ratio;
if (!dynamic && r_oldlightselection.GetBool())
{
ratio = LightIntensityAndDirectionAtPoint( pWorldLight, pZBuf, bucketOrigin, 0, NULL, &direction );
}
else
{
Vector mins, maxs;
ComputeLightcacheBounds( bucketOrigin, &mins, &maxs );
ratio = LightIntensityAndDirectionInBox( pWorldLight, pZBuf, bucketOrigin, mins, maxs, dynamic ? LIGHT_NO_OCCLUSION_CHECK : 0, &direction );
}
// No light contribution? Get outta here!
if ( ratio <= 0.0f )
return pVis;
// Check if we've got a skylight
if (pWorldLight->type == emit_skylight)
info.m_LightingStateHasSkylight = true;
// Figure out spotlight attenuation
float angularRatio = Engine_WorldLightAngle( pWorldLight, pWorldLight->normal, direction, direction );
// Use standard RGB to gray conversion
float illum = ratio * DotProduct( pWorldLight->intensity, s_Grayscale ); // Don't multiply by cone angle?
// It can't be a local light if it's too dark
// See the comment titled "EMIT_SURFACE LIGHTS" at the top for info.
if (pWorldLight->type == emit_surface || illum >= r_worldlightmin.GetFloat()) // FIXME: tune this value
{
int nWorldLights = min( g_pMaterialSystemHardwareConfig->MaxNumLights(), r_worldlights.GetInt() );
// if remaining slots, add to list
if ( lightingState.numlights < nWorldLights )
{
// save pointer to world light
lightingState.locallight[lightingState.numlights] = pWorldLight;
info.m_pIllum[lightingState.numlights] = illum;
++lightingState.numlights;
return pVis;
}
// no remaining slots
// find the dimmest existing light and replace
// If dynamic, make sure that it stays as a local light if possible.
int minLightIndex = FindDarkestWorldLight( lightingState.numlights, info.m_pIllum, dynamic ? 100000 : illum );
if (minLightIndex != -1)
{
// FIXME: We're sorting by ratio here instead of illum cause we either
// have to store more memory or do more computations; I'm not
// convinced it's any better of a metric though, so ratios for now...
// found a light was was dimmer, swap it with the current light
V_swap( pWorldLight, lightingState.locallight[minLightIndex] );
V_swap( illum, info.m_pIllum[minLightIndex] );
// FIXME: Avoid these recomputations
// But I don't know how to do it without storing a ton of data
// per cache entry... yuck!
// NOTE: We know the dot product can't be zero or illum would have been 0 to start with!
ratio = illum / DotProduct( pWorldLight->intensity, s_Grayscale );
if (pWorldLight->type == emit_skylight)
{
VectorFill( direction, 0 );
angularRatio = 1.0f;
}
else
{
VectorSubtract( pWorldLight->origin, bucketOrigin, direction );
VectorNormalize( direction );
// Recompute the ratios
angularRatio = Engine_WorldLightAngle( pWorldLight, pWorldLight->normal, direction, direction );
}
}
}
// Add the low light to the ambient box color
AddWorldLightToLightCube( pWorldLight, lightingState.r_boxcolor, direction, ratio * angularRatio );
return pVis;
}
//-----------------------------------------------------------------------------
// Construct a world light from a dynamic light
//-----------------------------------------------------------------------------
static void WorldLightFromDynamicLight( dlight_t const& dynamicLight,
dworldlight_t& worldLight )
{
VectorCopy( dynamicLight.origin, worldLight.origin );
worldLight.type = emit_point;
worldLight.intensity[0] = TexLightToLinear( dynamicLight.color.r, dynamicLight.color.exponent );
worldLight.intensity[1] = TexLightToLinear( dynamicLight.color.g, dynamicLight.color.exponent );
worldLight.intensity[2] = TexLightToLinear( dynamicLight.color.b, dynamicLight.color.exponent );
worldLight.style = dynamicLight.style;
// Compute cluster associated with the dynamic light
worldLight.cluster = CM_LeafCluster( CM_PointLeafnum(worldLight.origin) );
// Assume a quadratic attenuation factor; atten so we hit minlight
// at radius away...
float minlight = fpmax( dynamicLight.minlight, g_flMinLightingValue );
// NOTE: Previous implementation turned off attenuation at radius zero.
// clamping is more continuous
float radius = dynamicLight.GetRadius();
if ( radius < 0.1f )
radius = 0.1f;
worldLight.constant_attn = 0;
worldLight.linear_attn = 0;
worldLight.quadratic_attn = 1.0f / (minlight * radius * radius);
// Set the max radius
worldLight.radius = radius;
// Spotlights...
if (dynamicLight.m_OuterAngle > 0.0f)
{
worldLight.type = emit_spotlight;
VectorCopy( dynamicLight.m_Direction, worldLight.normal );
worldLight.stopdot = cos( dynamicLight.m_InnerAngle * M_PI / 180.0f );
worldLight.stopdot2 = cos( dynamicLight.m_OuterAngle * M_PI / 180.0f );
}
}
//-----------------------------------------------------------------------------
// Add in dynamic worldlights (lightstyles)
//-----------------------------------------------------------------------------
static const byte *ComputeLightStyles( lightcache_t* pCache, LightingState_t& lightingState,
const Vector& origin, int leaf, const byte* pVis )
{
VPROF_INCREMENT_COUNTER( "ComputeLightStyles", 1 );
LightingStateInfo_t info;
lightingState.ZeroLightingState();
// Next, add each world light with a lightstyle into the lighting state,
// ejecting less relevant local lights + folding them into the ambient cube
for ( int i = 0; i < host_state.worldbrush->numworldlights; ++i)
{
dworldlight_t *wl = &host_state.worldbrush->worldlights[i];
if (wl->style == 0)
continue;
int byte = wl->style >> 3;
int bit = wl->style & 0x7;
if( !( pCache->m_pLightstyles[byte] & ( 1 << bit ) ) )
{
continue;
}
// This is an optimization to avoid decompressing Vis twice
if (!pVis)
{
// Figure out the PVS info for this location
pVis = CM_ClusterPVS( CM_LeafCluster( leaf ) );
}
// Now add that world light into our list of worldlights
AddWorldLightToLightingState( wl, NULL, lightingState, info, origin, pVis );
}
pCache->m_LastFrameUpdated_LightStyles = r_framecount;
return pVis;
}
//-----------------------------------------------------------------------------
// Add in dynamic worldlights (lightstyles)
//-----------------------------------------------------------------------------
static void AddLightStylesForStaticProp( PropLightcache_t *pcache, LightingState_t& lightingState )
{
// Next, add each world light with a lightstyle into the lighting state,
// ejecting less relevant local lights + folding them into the ambient cube
for( int i = 0; i < pcache->m_LightStyleWorldLights.Count(); ++i )
{
Assert( pcache->m_LightStyleWorldLights[i] >= 0 );
Assert( pcache->m_LightStyleWorldLights[i] < host_state.worldbrush->numworldlights );
dworldlight_t *wl = &host_state.worldbrush->worldlights[pcache->m_LightStyleWorldLights[i]];
Assert( wl->style != 0 );
// Now add that world light into our list of worldlights
AddWorldLightToLightingState( wl, NULL, lightingState, *pcache, pcache->m_LightingOrigin, NULL,
false /*dynamic*/, true /*ignorevis*/ );
}
}
//-----------------------------------------------------------------------------
// Add DLights + ELights to the dynamic lighting
//-----------------------------------------------------------------------------
static dworldlight_t s_pDynamicLight[MAX_DLIGHTS + MAX_ELIGHTS];
static const byte* AddDLights( LightingStateInfo_t& info, LightingState_t& lightingState,
const Vector& origin, int leaf, const byte* pVis )
{
if ( !g_bActiveDlights )
return pVis;
const bool bIgnoreVis = false;
const bool bIgnoreVisTest = true;
// Next, add each world light with a lightstyle into the lighting state,
// ejecting less relevant local lights + folding them into the ambient cube
dlight_t* dl = cl_dlights;
for ( int i=0; i<MAX_DLIGHTS; ++i, ++dl )
{
// If the light's not active, then continue
if ( (r_dlightactive & (1 << i)) == 0 )
continue;
// If the light doesn't affect models, then continue
if (dl->flags & (DLIGHT_NO_MODEL_ILLUMINATION | DLIGHT_DISPLACEMENT_MASK))
continue;
// Fast reject. If we can reject it here, then we don't have to call WorldLightFromDynamicLight..
bool bReject;
int lightCluster = CM_LeafCluster( g_DLightLeafAccessors[i].GetLeaf( dl->origin ) );
pVis = FastRejectLightSource( bIgnoreVis, pVis, origin, emit_point, lightCluster, bReject );
if ( bReject )
continue;
// Construct a world light representing the dynamic light
// we're making a static list here because the lighting state
// contains a set of pointers to dynamic lights
WorldLightFromDynamicLight( *dl, s_pDynamicLight[i] );
// Now add that world light into our list of worldlights
pVis = AddWorldLightToLightingState( &s_pDynamicLight[i], NULL, lightingState,
info, origin, pVis, true, bIgnoreVis, bIgnoreVisTest );
}
return pVis;
}
static const byte* AddELights( LightingStateInfo_t& info, LightingState_t& lightingState,
const Vector& origin, int leaf, const byte* pVis )
{
if ( !g_bActiveElights )
return pVis;
const bool bIgnoreVis = false;
const bool bIgnoreVisTest = true;
// Next, add each world light with a lightstyle into the lighting state,
// ejecting less relevant local lights + folding them into the ambient cube
dlight_t* dl = cl_elights;
for ( int i=0; i<MAX_ELIGHTS; ++i, ++dl )
{
// If the light's not active, then continue
if ( !dl->IsRadiusGreaterThanZero() )
continue;
// If the light doesn't affect models, then continue
if (dl->flags & (DLIGHT_NO_MODEL_ILLUMINATION | DLIGHT_DISPLACEMENT_MASK))
continue;
// Fast reject. If we can reject it here, then we don't have to call WorldLightFromDynamicLight..
bool bReject;
int lightCluster = CM_LeafCluster( g_ELightLeafAccessors[i].GetLeaf( dl->origin ) );
pVis = FastRejectLightSource( bIgnoreVis, pVis, origin, emit_point, lightCluster, bReject );
if ( bReject )
continue;
// Construct a world light representing the dynamic light
// we're making a static list here because the lighting state
// contains a set of pointers to dynamic lights
WorldLightFromDynamicLight( *dl, s_pDynamicLight[i+MAX_DLIGHTS] );
// Now add that world light into our list of worldlights
pVis = AddWorldLightToLightingState( &s_pDynamicLight[i+MAX_DLIGHTS], NULL, lightingState,
info, origin, pVis, true, bIgnoreVis, bIgnoreVisTest );
}
return pVis;
}
//-----------------------------------------------------------------------------
// Given static + dynamic lighting, figure out the total light
//-----------------------------------------------------------------------------
static const byte *ComputeDynamicLighting( lightcache_t* pCache, LightingState_t& lightingState,
const Vector& origin, int leaf, const byte* pVis = 0 )
{
if (pCache->m_LastFrameUpdated_DynamicLighting != r_framecount)
{
VPROF_INCREMENT_COUNTER( "ComputeDynamicLighting", 1 );
// First factor in the cache into the current lighting state..
LightingStateInfo_t info;
pCache->m_DynamicLightingState.ZeroLightingState();
// Next, add each dlight one at a time
pVis = AddDLights( info, pCache->m_DynamicLightingState, origin, leaf, pVis );
// Finally, add in elights
// FIXME: Do we actually use these?
pVis = AddELights( info, pCache->m_DynamicLightingState, origin, leaf, pVis );
pCache->m_LastFrameUpdated_DynamicLighting = r_framecount;
}
Assert( pCache->m_DynamicLightingState.numlights >= 0 && pCache->m_DynamicLightingState.numlights <= MAXLOCALLIGHTS );
memcpy( &lightingState, &pCache->m_DynamicLightingState, sizeof(LightingState_t) );
return pVis;
}
//-----------------------------------------------------------------------------
// Adds a world light to the list of lights
//-----------------------------------------------------------------------------
static void AddWorldLightToLightingStateForStaticProps( dworldlight_t* pWorldLight,
LightingState_t& lightingState, LightingStateInfo_t& info, PropLightcache_t *pCache,
bool dynamic = false )
{
// FIXME: This is sort of a hack; only one skylight is allowed in the
// lighting...
if ((pWorldLight->type == emit_skylight) && info.m_LightingStateHasSkylight)
return;
// Get the lighting ratio
float ratio;
Vector direction;
if (!dynamic)
{
ratio = LightIntensityAndDirectionAtPoint( pWorldLight, NULL, pCache->m_LightingOrigin, 0, NULL, &direction );
}
else
{
Vector mins, maxs;
ComputeLightcacheBounds( pCache->m_LightingOrigin, &mins, &maxs );
ratio = LightIntensityAndDirectionInBox( pWorldLight, NULL, pCache->m_LightingOrigin,
pCache->mins, pCache->maxs, LIGHT_NO_OCCLUSION_CHECK, &direction );
}
// No light contribution? Get outta here!
if ( ratio <= 0.0f )
return;
// Check if we've got a skylight
if (pWorldLight->type == emit_skylight)
info.m_LightingStateHasSkylight = true;
// Figure out spotlight attenuation
float angularRatio = Engine_WorldLightAngle( pWorldLight, pWorldLight->normal, direction, direction );
// Use standard RGB to gray conversion
float illum = ratio * DotProduct( pWorldLight->intensity, s_Grayscale ); // Don't multiply by cone angle?
// It can't be a local light if it's too dark
// See the comment titled "EMIT_SURFACE LIGHTS" at the top for info.
if (pWorldLight->type == emit_surface || illum >= r_worldlightmin.GetFloat()) // FIXME: tune this value
{
int nWorldLights = min( g_pMaterialSystemHardwareConfig->MaxNumLights(), r_worldlights.GetInt() );
// if remaining slots, add to list
if ( lightingState.numlights < nWorldLights )
{
// save pointer to world light
lightingState.locallight[lightingState.numlights] = pWorldLight;
info.m_pIllum[lightingState.numlights] = illum;
++lightingState.numlights;
return;
}
// no remaining slots
// find the dimmest existing light and replace
int minLightIndex = FindDarkestWorldLight( lightingState.numlights, info.m_pIllum, dynamic ? 100000 : illum );
if (minLightIndex != -1)
{
// FIXME: We're sorting by ratio here instead of illum cause we either
// have to store more memory or do more computations; I'm not
// convinced it's any better of a metric though, so ratios for now...
// found a light was was dimmer, swap it with the current light
V_swap( pWorldLight, lightingState.locallight[minLightIndex] );
V_swap( illum, info.m_pIllum[minLightIndex] );
// FIXME: Avoid these recomputations
// But I don't know how to do it without storing a ton of data
// per cache entry... yuck!
// NOTE: We know the dot product can't be zero or illum would have been 0 to start with!
ratio = illum / DotProduct( pWorldLight->intensity, s_Grayscale );
if (pWorldLight->type == emit_skylight)
{
VectorFill( direction, 0 );
angularRatio = 1.0f;
}
else
{
VectorSubtract( pWorldLight->origin, pCache->m_LightingOrigin, direction );
VectorNormalize( direction );
// Recompute the ratios
angularRatio = Engine_WorldLightAngle( pWorldLight, pWorldLight->normal, direction, direction );
}
}
}
// Add the low light to the ambient box color
AddWorldLightToLightCube( pWorldLight, lightingState.r_boxcolor, direction, ratio * angularRatio );
}
static void AddDLightsForStaticProps( LightingStateInfo_t& info, LightingState_t& lightingState,
PropLightcache_t *pCache )
{
// mask off any dlights that have gone inactive
pCache->m_DLightActive &= r_dlightactive;
if ( pCache->m_DLightMarkFrame != r_framecount )
{
pCache->m_DLightActive = 0;
}
if ( !pCache->m_DLightActive )
return;
// Iterate the relevant dlights and add them to the lighting state
dlight_t *dl = cl_dlights;
for ( int i=0; i<MAX_DLIGHTS; ++i, ++dl )
{
// If the light doesn't affect this model, then continue.
if( !( pCache->m_DLightActive & ( 1 << i ) ) )
continue;
// Construct a world light representing the dynamic light
// we're making a static list here because the lighting state
// contains a set of pointers to dynamic lights
WorldLightFromDynamicLight( *dl, s_pDynamicLight[i] );
// Now add that world light into our list of worldlights
AddWorldLightToLightingStateForStaticProps( &s_pDynamicLight[i], lightingState,
info, pCache, true );
}
}
//-----------------------------------------------------------------------------
// Add static lighting to the lighting state
//-----------------------------------------------------------------------------
ConVar r_lightcache_zbuffercache( "r_lightcache_zbuffercache", "0", FCVAR_ALLOWED_IN_COMPETITIVE );
static void AddStaticLighting(
CBaseLightCache* pCache,
const Vector& origin,
const byte* pVis,
bool bStaticProp,
bool bAddedLeafAmbientCube )
{
VPROF( "AddStaticLighting" );
// First, blat out the lighting state
int i;
pCache->m_StaticLightingState.numlights = 0;
pCache->m_LightingStateHasSkylight = false;
// NOTE: for static props, we mark lightstyles elsewhere (BuildStaticLightingCacheLightStyleInfo)
if( !bStaticProp )
{
pCache->m_LightingFlags &= ~( HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE |
HACKLIGHTCACHEFLAGS_HASNONSWITCHABLELIGHTSTYLE );
memset( pCache->m_pLightstyles, 0, sizeof( pCache->m_pLightstyles ) );
}
// Next, add each static light one at a time into the lighting state,
// ejecting less relevant local lights + folding them into the ambient cube
// Also, we need to add *all* new lights into the total box color
for (i = 0; i < host_state.worldbrush->numworldlights; ++i)
{
dworldlight_t *wl = &host_state.worldbrush->worldlights[i];
lightzbuffer_t *pZBuf;
if ( r_lightcache_zbuffercache.GetInt() )
pZBuf = &host_state.worldbrush->shadowzbuffers[i];
else
pZBuf = NULL;
// See the comment titled "EMIT_SURFACE LIGHTS" at the top for info.
if ( bAddedLeafAmbientCube && (wl->flags & DWL_FLAGS_INAMBIENTCUBE) )
{
Assert( wl->type == emit_surface );
continue;
}
// Don't add lights without lightstyles... we cache static lighting + lightstyles separately from static lighting
if (wl->style == 0)
{
// Now add that world light into our list of worldlights
AddWorldLightToLightingState( wl, pZBuf, pCache->m_StaticLightingState, *pCache, origin, pVis,
false, false );
}
else
{
// This is a lighstyle (flickering or switchable light)
// NOTE: for static props, we mark lightstyles elsewhere. (BuildStaticLightingCacheLightStyleInfo)
if( !bStaticProp )
{
int byte = wl->style >> 3;
int bit = wl->style & 0x7;
if( !( pCache->m_pLightstyles[byte] & ( 1 << bit ) ) )
{
Vector mins, maxs;
Vector dummyDirection;
ComputeLightcacheBounds( origin, &mins, &maxs );
float ratio = LightIntensityAndDirectionInBox( wl, NULL, origin, mins, maxs,
LIGHT_NO_OCCLUSION_CHECK | LIGHT_IGNORE_LIGHTSTYLE_VALUE, &dummyDirection );
// See if this light has any contribution on this cache entry.
if( ratio > 0.0f )
{
if( d_lightstylenumframes[wl->style] <= 1 )
{
pCache->m_LightingFlags |= HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE;
}
else
{
pCache->m_LightingFlags |= HACKLIGHTCACHEFLAGS_HASNONSWITCHABLELIGHTSTYLE;
}
pCache->m_pLightstyles[byte] |= (1 << bit);
}
}
}
}
}
}
//-----------------------------------------------------------------------------
// Checks to see if the lightstyles are valid for this cache entry
//-----------------------------------------------------------------------------
static bool IsCachedLightStylesValid( CBaseLightCache* pCache )
{
if (!pCache->HasLightStyle())
return true;
// FIXME: Can this start at 1, or is 0 required?
for (int i = 1; i < MAX_LIGHTSTYLES; ++i)
{
int byte = i >> 3;
int bit = i & 0x7;
if (pCache->m_pLightstyles[byte] & ( 1 << bit ))
{
if (d_lightstyleframe[i] > pCache->m_LastFrameUpdated_LightStyles)
return false;
}
}
return true;
}
//-----------------------------------------------------------------------------
// Find a lightcache entry within the requested radius from a point
//-----------------------------------------------------------------------------
#if 0
static int FindRecentCacheEntryWithinRadius( int count, CacheInfo_t* pCache, const Vector& origin, float radius )
{
radius *= radius;
// Try to find something within the radius of an existing new sample
int minIndex = -1;
for (int i = 0; i < count; ++i)
{
Vector delta;
ComputeLightcacheOrigin( pCache[i].x, pCache[i].y, pCache[i].z, delta );
delta -= origin;
float distSq = delta.LengthSqr();
if (distSq < radius )
{
minIndex = i;
radius = distSq;
}
}
return minIndex;
}
#endif
//-----------------------------------------------------------------------------
// Draw the lightcache box for debugging
//-----------------------------------------------------------------------------
static void DebugRenderLightcache( Vector &sampleOrigin, LightingState_t& lightingState, bool bDebugModel )
{
#ifndef SWDS
// draw the cache entry defined by the sampling origin
Vector cacheOrigin, cacheMins, cacheMaxs, lightMins, lightMaxs;
ComputeLightcacheBounds( sampleOrigin, &cacheMins, &cacheMaxs );
cacheOrigin = ( cacheMins + cacheMaxs ) * 0.5f;
cacheMins -= cacheOrigin;
cacheMaxs -= cacheOrigin;
// For drawing irradiance light probes as shown in [Greger98]
if( r_drawlightcache.GetInt() == 5 )
{
if ( bDebugModel )
{
CDebugOverlay::AddSphereOverlay( sampleOrigin, 2.5f, 32, 32, 255, 255, 255, 255, 0.0f ); // 8 inch solid white sphere
for ( int j = 0; j < lightingState.numlights; ++j )
{
Vector vLightPosition;
int r, g, b;
if ( lightingState.locallight[j]->type == emit_skylight )
{
vLightPosition = sampleOrigin - lightingState.locallight[j]->normal * 10000.0f;
r = 255;
g = 50;
b = 50;
}
else
{
vLightPosition = lightingState.locallight[j]->origin;
r = 255;
g = 255;
b = 255;
}
CDebugOverlay::AddLineOverlay( sampleOrigin, vLightPosition, r, g, b, 255, true, 0.0f );
}
}
}
else
{
// draw cache entry
CDebugOverlay::AddBoxOverlay( cacheOrigin, cacheMins, cacheMaxs, vec3_angle, 255, 255, 255, 0, 0.0f );
// draw boxes at light ray terminals to visualize endpoints
if ( lightingState.numlights > 0 )
{
lightMins.Init( -2, -2, -2 );
lightMaxs.Init( 2, 2, 2);
CDebugOverlay::AddBoxOverlay( sampleOrigin, lightMins, lightMaxs, vec3_angle, 100, 255, 100, 0, 0.0f );
}
int nLineColor[4] = {255, 170, 85, 0};
for (int j = 0; j < lightingState.numlights; ++j)
{
Vector vLightPosition;
int r, g, b;
if ( lightingState.locallight[j]->type == emit_skylight )
{
vLightPosition = sampleOrigin - lightingState.locallight[j]->normal * 10000.0f;
r = 255;
g = 50;
b = 50;
}
else
{
vLightPosition = lightingState.locallight[j]->origin;
r = g = b = nLineColor[j];
}
// draw lines from sampling point to light
CDebugOverlay::AddLineOverlay( sampleOrigin, vLightPosition, r, g, b, 255, true, 0.0f );
CDebugOverlay::AddBoxOverlay( lightingState.locallight[j]->origin, lightMins, lightMaxs, vec3_angle, 255, 255, 100, 0, 0.0f );
}
}
#endif
}
//-----------------------------------------------------------------------------
// Identify lighting errors
//-----------------------------------------------------------------------------
bool IdentifyLightingErrors( int leaf, LightingState_t& lightingState )
{
if (r_drawlightcache.GetInt() == 3)
{
if (CM_LeafContents(leaf) == CONTENTS_SOLID)
{
// Try another choice...
lightingState.r_boxcolor[0].Init( 1, 0, 0 );
lightingState.r_boxcolor[1].Init( 1, 0, 0 );
lightingState.r_boxcolor[2].Init( 1, 0, 0 );
lightingState.r_boxcolor[3].Init( 1, 0, 0 );
lightingState.r_boxcolor[4].Init( 1, 0, 0 );
lightingState.r_boxcolor[5].Init( 1, 0, 0 );
lightingState.numlights = 0;
return true;
}
}
return false;
}
//-----------------------------------------------------------------------------
// Compute the cache...
//-----------------------------------------------------------------------------
static const byte* ComputeStaticLightingForCacheEntry( CBaseLightCache *pcache, const Vector& origin, int leaf, bool bStaticProp = false )
{
VPROF_INCREMENT_COUNTER( "ComputeStaticLightingForCacheEntry", 1 );
VPROF( "ComputeStaticLightingForCacheEntry" );
// Figure out the PVS info for this location
const byte* pVis = CM_ClusterPVS( CM_LeafCluster( leaf ) );
bool bAddedLeafAmbientCube;
R_StudioGetAmbientLightForPoint(
leaf,
origin,
pcache->m_StaticLightingState.r_boxcolor,
bStaticProp,
&bAddedLeafAmbientCube );
// get direct lighting from world light sources (point lights, etc.)
if ( !r_ambientlightingonly.GetInt() )
{
AddStaticLighting( pcache, origin, pVis, bStaticProp, bAddedLeafAmbientCube );
}
return pVis;
}
static void BuildStaticLightingCacheLightStyleInfo( PropLightcache_t* pcache, const Vector& mins, const Vector& maxs )
{
const byte *pVis = NULL;
Assert( pcache->m_LightStyleWorldLights.Count() == 0 );
pcache->m_LightingFlags &= ~( HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE | HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE );
// clear lightstyles
memset( pcache->m_pLightstyles, 0, MAX_LIGHTSTYLE_BYTES );
for ( short i = 0; i < host_state.worldbrush->numworldlights; ++i)
{
dworldlight_t *wl = &host_state.worldbrush->worldlights[i];
if (wl->style == 0)
continue;
// This is an optimization to avoid decompressing Vis twice
if (!pVis)
{
// Figure out the PVS info for this static prop
pVis = CM_ClusterPVS( CM_LeafCluster( pcache->leaf ) );
}
// FIXME: Could do better here if we had access to the list of leaves that this
// static prop is in. For now, we use the lighting origin.
if( pVis[ wl->cluster >> 3 ] & ( 1 << ( wl->cluster & 7 ) ) )
{
// Use the maximum illumination to cull out lights that are far away.
dworldlight_t tmpLight = *wl;
tmpLight.style = 0;
Vector dummyDirection;
float ratio = LightIntensityAndDirectionInBox( &tmpLight, NULL, pcache->m_LightingOrigin, mins, maxs,
LIGHT_NO_OCCLUSION_CHECK | LIGHT_IGNORE_LIGHTSTYLE_VALUE, &dummyDirection );
// See if this light has any contribution on this cache entry.
if( ratio <= 0.0f )
{
continue;
}
{
MEM_ALLOC_CREDIT();
pcache->m_LightStyleWorldLights.AddToTail( i );
}
int byte = wl->style >> 3;
int bit = wl->style & 0x7;
pcache->m_pLightstyles[byte] |= ( 1 << bit );
if( d_lightstylenumframes[wl->style] <= 1 )
{
pcache->m_LightingFlags |= HACKLIGHTCACHEFLAGS_HASSWITCHABLELIGHTSTYLE;
}
else
{
pcache->m_LightingFlags |= HACKLIGHTCACHEFLAGS_HASNONSWITCHABLELIGHTSTYLE;
}
}
}
}
static ITexture *FindEnvCubemapForPoint( const Vector& origin )
{
worldbrushdata_t *pBrushData = host_state.worldbrush;
if( pBrushData && pBrushData->m_nCubemapSamples > 0 )
{
int smallestIndex = 0;
Vector blah = origin - pBrushData->m_pCubemapSamples[0].origin;
float smallestDist = DotProduct( blah, blah );
for( int i = 1; i < pBrushData->m_nCubemapSamples; i++ )
{
Vector ign = origin - pBrushData->m_pCubemapSamples[i].origin;
float dist = DotProduct( ign, ign );
if( dist < smallestDist )
{
smallestDist = dist;
smallestIndex = i;
}
}
return pBrushData->m_pCubemapSamples[smallestIndex].pTexture;
}
else
{
return NULL;
}
}
//-----------------------------------------------------------------------------
// Create static light cache entry
//-----------------------------------------------------------------------------
LightCacheHandle_t CreateStaticLightingCache( const Vector& origin, const Vector& mins, const Vector& maxs )
{
PropLightcache_t* pcache = s_PropCache.Alloc();
pcache->m_LightingOrigin = origin;
pcache->m_Flags = 0;
pcache->mins = mins;
pcache->maxs = maxs;
// initialize this to point to our current origin
pcache->leaf = CM_PointLeafnum(origin);
// Add the prop to the list of props
pcache->m_pNextPropLightcache = s_pAllStaticProps;
s_pAllStaticProps = pcache;
pcache->m_Flags = 0; // must set this to zero so that this cache entry will be invalid.
pcache->m_pEnvCubemapTexture = FindEnvCubemapForPoint( origin );
BuildStaticLightingCacheLightStyleInfo( pcache, mins, maxs );
return (LightCacheHandle_t)pcache;
}
bool StaticLightCacheAffectedByDynamicLight( LightCacheHandle_t handle )
{
PropLightcache_t *pcache = ( PropLightcache_t *)handle;
return pcache->HasDlights();
}
bool StaticLightCacheAffectedByAnimatedLightStyle( LightCacheHandle_t handle )
{
PropLightcache_t *pcache = ( PropLightcache_t *)handle;
if( !pcache->HasLightStyle() )
{
return false;
}
else
{
for( int i = 0; i < pcache->m_LightStyleWorldLights.Count(); ++i )
{
Assert( pcache->m_LightStyleWorldLights[i] >= 0 );
Assert( pcache->m_LightStyleWorldLights[i] < host_state.worldbrush->numworldlights );
dworldlight_t *wl = &host_state.worldbrush->worldlights[pcache->m_LightStyleWorldLights[i]];
Assert( wl->style != 0 );
if( d_lightstylenumframes[wl->style] > 1 )
{
return true;
}
}
return false;
}
}
bool StaticLightCacheNeedsSwitchableLightUpdate( LightCacheHandle_t handle )
{
PropLightcache_t *pcache = ( PropLightcache_t *)handle;
if( !pcache->HasSwitchableLightStyle() )
{
return false;
}
else
{
for( int i = 0; i < pcache->m_LightStyleWorldLights.Count(); ++i )
{
Assert( pcache->m_LightStyleWorldLights[i] >= 0 );
Assert( pcache->m_LightStyleWorldLights[i] < host_state.worldbrush->numworldlights );
dworldlight_t *wl = &host_state.worldbrush->worldlights[pcache->m_LightStyleWorldLights[i]];
Assert( wl->style != 0 );
// Is it a switchable light?
if( d_lightstylenumframes[wl->style] <= 1 )
{
// Has it changed since the last time we updated our cached static VB version?
if( pcache->m_SwitchableLightFrame < d_lightstyleframe[wl->style] )
{
pcache->m_SwitchableLightFrame = r_framecount;
// return true since our static vb is dirty
return true;
}
}
}
return false;
}
}
//-----------------------------------------------------------------------------
// Clears the prop lighting cache
//-----------------------------------------------------------------------------
void ClearStaticLightingCache()
{
s_PropCache.Clear();
s_pAllStaticProps = NULL;
}
//-----------------------------------------------------------------------------
// Recomputes all static prop lighting
//-----------------------------------------------------------------------------
void InvalidateStaticLightingCache(void)
{
for ( PropLightcache_t *pCur=s_pAllStaticProps; pCur; pCur=pCur->m_pNextPropLightcache )
{
// Compute the static lighting
pCur->m_Flags = 0;
pCur->m_LightingFlags &=~HACKLIGHTCACHEFLAGS_HASDONESTATICLIGHTING;
LightcacheGetStatic( ( LightCacheHandle_t )pCur, NULL, LIGHTCACHEFLAGS_STATIC );
}
}
//-----------------------------------------------------------------------------
// Gets the lightcache entry for a static prop
//-----------------------------------------------------------------------------
LightingState_t *LightcacheGetStatic( LightCacheHandle_t cache, ITexture **pEnvCubemapTexture, unsigned int flags )
{
PropLightcache_t *pcache = ( PropLightcache_t * )cache;
Assert( pcache );
// get the cubemap texture
if ( pEnvCubemapTexture )
{
*pEnvCubemapTexture = pcache->m_pEnvCubemapTexture;
}
bool bRecalcStaticLighting = false;
bool bRecalcLightStyles = (pcache->HasLightStyle() && pcache->m_LastFrameUpdated_LightStyles != r_framecount) && !IsCachedLightStylesValid(pcache);
bool bRecalcDLights = pcache->HasDlights() && pcache->m_LastFrameUpdated_DynamicLighting != r_framecount;
if ( flags != pcache->m_Flags )
{
// This should not happen often, but if the flags change, blow away all of the lighting state.
// This cache entry's state must be regenerated.
bRecalcStaticLighting = true;
bRecalcLightStyles = true;
bRecalcDLights = true;
pcache->m_Flags = flags;
}
else if ( !bRecalcDLights && !bRecalcLightStyles )
{
// already have expected lighting state
// get out of here since we already did this this frame.
return &pcache->m_DynamicLightingState;
}
else
{
// the dlight cache includes lightstyles
// we have to recalc the dlight cache if lightstyles change.
if ( bRecalcLightStyles )
{
bRecalcDLights = true;
}
}
// must need to recalc, do so
LightingState_t accumulatedState;
// static lighting state gets preserved because its expensive to generate
// it gets re-requested for static props that rebake
if ( flags & LIGHTCACHEFLAGS_STATIC )
{
// want static lighting data
if ( bRecalcStaticLighting && !(pcache->m_LightingFlags & HACKLIGHTCACHEFLAGS_HASDONESTATICLIGHTING) )
{
ComputeStaticLightingForCacheEntry( pcache, pcache->m_LightingOrigin, pcache->leaf, true );
pcache->m_LightingFlags |= HACKLIGHTCACHEFLAGS_HASDONESTATICLIGHTING;
}
// set as start values for accumulation
accumulatedState = pcache->m_StaticLightingState;
}
else
{
// set as zero for accumulation
accumulatedState.ZeroLightingState();
}
// lightstyle lighting state gets preserved when there is no lightstyle change
if ( flags & LIGHTCACHEFLAGS_LIGHTSTYLE )
{
if ( bRecalcLightStyles )
{
// accumulate lightstyles
AddLightStylesForStaticProp( pcache, accumulatedState );
pcache->m_LightStyleLightingState = accumulatedState;
pcache->m_LastFrameUpdated_LightStyles = r_framecount;
}
else
{
accumulatedState = pcache->m_LightStyleLightingState;
}
}
if ( flags & LIGHTCACHEFLAGS_DYNAMIC )
{
if ( bRecalcDLights )
{
// accumulate dynamic lights
AddDLightsForStaticProps( *( LightingStateInfo_t *)pcache, accumulatedState, pcache );
pcache->m_DynamicLightingState = accumulatedState;
pcache->m_LastFrameUpdated_DynamicLighting = r_framecount;
}
else
{
accumulatedState = pcache->m_DynamicLightingState;
}
}
else
{
// hold the current state
pcache->m_DynamicLightingState = accumulatedState;
}
// caller gets requested data
return &pcache->m_DynamicLightingState;
}
inline const byte *AddLightingState(
LightingState_t &dst,
const LightingState_t &src,
LightingStateInfo_t &info,
const Vector& bucketOrigin,
const byte *pVis,
bool bDynamic,
bool bIgnoreVis )
{
int i;
for( i = 0; i < src.numlights; i++ )
{
pVis = AddWorldLightToLightingState( src.locallight[i], NULL, dst, info, bucketOrigin, pVis,
bDynamic, bIgnoreVis );
}
for( i = 0; i < 6; i++ )
{
dst.r_boxcolor[i] += src.r_boxcolor[i];
}
return pVis;
}
//-----------------------------------------------------------------------------
// Get or create the lighting information for this point
// This is the version for dynamic objects.
//-----------------------------------------------------------------------------
const byte* PrecalcLightingState( lightcache_t *pCache, const byte *pVis )
{
LightingState_t lightingState;
lightingState.ZeroLightingState();
pCache->m_StaticPrecalc_LightingStateInfo.Clear();
int i;
for( i = 0; i < pCache->m_StaticLightingState.numlights; i++ )
{
pVis = AddWorldLightToLightingState(
pCache->m_StaticLightingState.locallight[i],
NULL,
lightingState,
pCache->m_StaticPrecalc_LightingStateInfo,
pCache->m_LightingOrigin,
pVis,
true, // bDynamic
false // bIgnoreVis
);
}
for ( i=0; i < 6; i++ )
pCache->m_StaticLightingState.r_boxcolor[i] += lightingState.r_boxcolor[i];
pCache->m_StaticPrecalc_NumLocalLights = lightingState.numlights;
for ( i=0; i < pCache->m_StaticPrecalc_NumLocalLights; i++ )
pCache->m_StaticPrecalc_LocalLight[i] = lightingState.locallight[i];
return pVis;
}
void CopyPrecalcedLightingState( lightcache_t *pCache, LightingState_t &lightingState, LightingStateInfo_t &info )
{
info = pCache->m_StaticPrecalc_LightingStateInfo;
int i;
for ( i=0; i < 6; i++ )
lightingState.r_boxcolor[i] = pCache->m_StaticLightingState.r_boxcolor[i];
lightingState.numlights = pCache->m_StaticPrecalc_NumLocalLights;
for ( i=0; i < lightingState.numlights; i++ )
lightingState.locallight[i] = pCache->m_StaticPrecalc_LocalLight[i];
}
void AdjustLightCacheOrigin( lightcache_t *pCache, const Vector &origin, int originLeaf )
{
Vector cacheMins;
Vector cacheMaxs;
Vector center;
trace_t tr;
Ray_t ray;
CTraceFilterWorldOnly worldTraceFilter;
ITraceFilter *pTraceFilter = &worldTraceFilter;
// quiet compiler
tr.startsolid = false;
tr.fraction = 0;
// prefer to use the center of the light cache for all sampling
// which helps consistent stable cache entries
ComputeLightcacheBounds( origin, &cacheMins, &cacheMaxs );
center = cacheMins + cacheMaxs;
center *= 0.5f;
bool bTraceToCenter = true;
int centerLeaf = CM_PointLeafnum(center);
if (centerLeaf != originLeaf)
{
// preferred center resides in a different leaf
if (CM_LeafContents(centerLeaf) & MASK_OPAQUE)
{
// preferred center is invalid
bTraceToCenter = false;
}
else
{
// ensure the desired center resides in the leaf that the provided origin is in
CM_SnapPointToReferenceLeaf(origin, LIGHTCACHE_SNAP_EPSILON, &center);
}
}
if (bTraceToCenter)
{
// if the center is unavailable, fallback to provided origin
ray.Init( origin, center );
g_pEngineTraceClient->TraceRay( ray, MASK_OPAQUE, pTraceFilter, &tr );
}
if (bTraceToCenter && tr.startsolid)
{
// origin is in solid, can't trace anywhere, use bad origin as provided
VectorCopy(origin, pCache->m_LightingOrigin);
}
else if (!bTraceToCenter || tr.fraction < 1)
{
// center is occluded
// trace again, recompute alternate x-y center, substitute z
// ensure the desired center resides in the leaf that the provided origin is in
center.x = (cacheMins.x + cacheMaxs.x) * 0.5f;
center.y = (cacheMins.y + cacheMaxs.y) * 0.5f;
center.z = origin.z;
CM_SnapPointToReferenceLeaf(origin, LIGHTCACHE_SNAP_EPSILON, &center);
ray.Init( origin, center );
g_pEngineTraceClient->TraceRay( ray, MASK_OPAQUE, pTraceFilter, &tr );
if (tr.fraction < 1)
{
// no further fallback, use origin as provided
VectorCopy(origin, pCache->m_LightingOrigin);
}
else
{
// trace succeeded
VectorCopy(center, pCache->m_LightingOrigin);
}
}
else
{
// trace succeeded
VectorCopy(center, pCache->m_LightingOrigin);
}
}
bool AllowFullCacheMiss(int flags)
{
if ( r_framecount < 60 || r_framecount != g_FrameIndex )
{
g_FrameMissCount = 0;
g_FrameIndex = r_framecount;
}
if ( g_FrameMissCount < lightcache_maxmiss.GetInt() )
{
g_FrameMissCount++;
return true;
}
if ( flags & LIGHTCACHEFLAGS_ALLOWFAST )
return false;
return true;
}
lightcache_t *FindNearestCache( int x, int y, int z, int leafIndex )
{
int bestDist = INT_MAX;
lightcache_t *pBest = NULL;
short current = GetLightLRUTail().lru_prev;
int dx, dy, dz;
while ( current != LIGHT_LRU_HEAD_INDEX )
{
lightcache_t *pCache = &lightcache[current];
int dist = 0;
dx = pCache->x - x;
dx = abs(dx);
dy = pCache->y - y;
dy = abs(dy);
dz = pCache->z - z;
dz = abs(dz);
if ( leafIndex != pCache->leaf )
{
dist += 2;
}
dist = max(dist, dx);
dist = max(dist, dy);
dist = max(dist, dz);
if ( dist < bestDist )
{
pBest = pCache;
bestDist = dist;
if ( dist <= 1 )
break;
}
current = pCache->lru_prev;
}
return pBest;
}
ITexture *LightcacheGetDynamic( const Vector& origin, LightingState_t& lightingState,
LightcacheGetDynamic_Stats &stats, unsigned int flags, bool bDebugModel )
{
VPROF_BUDGET( "LightcacheGet", VPROF_BUDGETGROUP_LIGHTCACHE );
LightingStateInfo_t info;
// generate the hashing vars
int originLeaf = CM_PointLeafnum(origin);
/*
if (IdentifyLightingErrors(leaf, lightingState))
return false;
*/
int x, y, z;
OriginToCacheOrigin( origin, x, y, z );
// convert vars to hash key / bucket id
int bucket = LightcacheHashKey( x, y, z, originLeaf );
const byte* pVis = NULL;
bool bComputeLightStyles = ( flags & LIGHTCACHEFLAGS_LIGHTSTYLE ) != 0;
// See if we've already computed the light in this location
lightcache_t *pCache = FindInCache(bucket, x, y, z, originLeaf);
if ( pCache )
{
// cache hit, move to tail of LRU
LightcacheMark( pCache );
if ( bComputeLightStyles && IsCachedLightStylesValid( pCache ) )
{
bComputeLightStyles = false;
}
}
else if ( !AllowFullCacheMiss(flags) )
{
pCache = FindNearestCache( x, y, z, originLeaf );
originLeaf = pCache->leaf;
x = pCache->x;
y = pCache->y;
z = pCache->z;
}
if ( !pCache )
{
VPROF_INCREMENT_COUNTER( "lightcache miss", 1 );
// cache miss, nothing appropriate from the frame cache, make a new entry
pCache = NewLightcacheEntry(bucket);
// initialize the cache entry based on provided origin
pCache->x = x;
pCache->y = y;
pCache->z = z;
pCache->leaf = originLeaf;
if ( r_lightcachecenter.GetBool() )
{
AdjustLightCacheOrigin( pCache, origin, originLeaf );
}
else
{
// old behavior, use provided origin
VectorCopy(origin, pCache->m_LightingOrigin);
}
// Figure out which env_cubemap is used for this cache entry.
pCache->m_pEnvCubemapTexture = FindEnvCubemapForPoint( pCache->m_LightingOrigin );
// Compute the static portion of the cache
pVis = ComputeStaticLightingForCacheEntry( pCache, pCache->m_LightingOrigin, originLeaf );
pVis = PrecalcLightingState( pCache, pVis );
}
// NOTE: On a cache miss, this has to be after ComputeStaticLightingForCacheEntry since these flags are computed there.
stats.m_bHasNonSwitchableLightStyles = pCache->HasNonSwitchableLightStyle();
stats.m_bHasSwitchableLightStyles = pCache->HasSwitchableLightStyle();
if ( bComputeLightStyles )
{
pVis = ComputeLightStyles( pCache, pCache->m_LightStyleLightingState, pCache->m_LightingOrigin, originLeaf, pVis );
stats.m_bNeedsSwitchableLightStyleUpdate = true;
}
else
{
stats.m_bNeedsSwitchableLightStyleUpdate = false;
}
stats.m_bHasDLights = false;
if ( flags & LIGHTCACHEFLAGS_DYNAMIC )
{
pVis = ComputeDynamicLighting( pCache, pCache->m_DynamicLightingState, pCache->m_LightingOrigin, originLeaf, pVis );
if( pCache->m_DynamicLightingState.numlights > 0 )
{
stats.m_bHasDLights = true;
}
}
if ( flags & LIGHTCACHEFLAGS_STATIC )
{
CopyPrecalcedLightingState( pCache, lightingState, info );
}
else
{
lightingState.ZeroLightingState();
}
if ( flags & LIGHTCACHEFLAGS_LIGHTSTYLE )
{
pVis = AddLightingState( lightingState, pCache->m_LightStyleLightingState, info, pCache->m_LightingOrigin, pVis,
true /*bDynamic*/, false /*bIgnoreVis*/ );
}
if ( flags & LIGHTCACHEFLAGS_DYNAMIC )
{
pVis = AddLightingState( lightingState, pCache->m_DynamicLightingState, info, pCache->m_LightingOrigin, pVis,
true /*bDynamic*/, false /*bIgnoreVis*/ );
}
if ( r_drawlightcache.GetBool() )
{
DebugRenderLightcache( pCache->m_LightingOrigin, lightingState, bDebugModel );
}
return pCache->m_pEnvCubemapTexture;
}
//-----------------------------------------------------------------------------
// Compute the contribution of D- and E- lights at a point + normal
//-----------------------------------------------------------------------------
void ComputeDynamicLighting( const Vector& pt, const Vector* pNormal, Vector& color )
{
if ( !g_bActiveDlights && !g_bActiveElights )
{
VectorFill( color, 0 );
return;
}
// Next, add each world light with a lightstyle into the lighting state,
// ejecting less relevant local lights + folding them into the ambient cube
static Vector ambientTerm[6] =
{
Vector(0,0,0),
Vector(0,0,0),
Vector(0,0,0),
Vector(0,0,0),
Vector(0,0,0),
Vector(0,0,0)
};
int lightCount = 0;
LightDesc_t pLightDesc[MAX_DLIGHTS + MAX_ELIGHTS];
int i;
dlight_t* dl = cl_dlights;
if ( g_bActiveDlights )
{
for ( i=0; i<MAX_DLIGHTS; ++i, ++dl )
{
// If the light's not active, then continue
if ( (r_dlightactive & (1 << i)) == 0 )
continue;
// If the light doesn't affect models, then continue
if (dl->flags & (DLIGHT_NO_MODEL_ILLUMINATION | DLIGHT_DISPLACEMENT_MASK))
continue;
// Construct a world light representing the dynamic light
// we're making a static list here because the lighting state
// contains a set of pointers to dynamic lights
dworldlight_t worldLight;
WorldLightFromDynamicLight( *dl, worldLight );
WorldLightToMaterialLight( &worldLight, pLightDesc[lightCount] );
++lightCount;
}
}
if ( g_bActiveElights )
{
// Next, add each world light with a lightstyle into the lighting state,
// ejecting less relevant local lights + folding them into the ambient cube
dl = cl_elights;
for ( i=0; i<MAX_ELIGHTS; ++i, ++dl )
{
// If the light's not active, then continue
if ( !dl->IsRadiusGreaterThanZero() )
continue;
// If the light doesn't affect models, then continue
if (dl->flags & (DLIGHT_NO_MODEL_ILLUMINATION | DLIGHT_DISPLACEMENT_MASK))
continue;
// Construct a world light representing the dynamic light
// we're making a static list here because the lighting state
// contains a set of pointers to dynamic lights
dworldlight_t worldLight;
WorldLightFromDynamicLight( *dl, worldLight );
WorldLightToMaterialLight( &worldLight, pLightDesc[lightCount] );
++lightCount;
}
}
if ( lightCount )
{
g_pStudioRender->ComputeLighting( ambientTerm, lightCount,
pLightDesc, pt, *pNormal, color );
}
else
{
VectorFill( color, 0 );
}
}
//-----------------------------------------------------------------------------
// Is Dynamic Light?
//-----------------------------------------------------------------------------
static bool IsDynamicLight( dworldlight_t *pWorldLight )
{
// NOTE: This only works because we're using some implementation details
// that the dynamic lights are stored in a little static array
return ( pWorldLight >= s_pDynamicLight && pWorldLight < &s_pDynamicLight[ARRAYSIZE(s_pDynamicLight)] );
}
//-----------------------------------------------------------------------------
// Computes an average color (of sorts) at a particular point + optional normal
//-----------------------------------------------------------------------------
void ComputeLighting( const Vector& pt, const Vector* pNormal, bool bClamp, Vector& color, Vector *pBoxColors )
{
LightingState_t lightingState;
LightcacheGetDynamic_Stats stats;
LightcacheGetDynamic( pt, lightingState, stats, LIGHTCACHEFLAGS_STATIC|LIGHTCACHEFLAGS_DYNAMIC|LIGHTCACHEFLAGS_LIGHTSTYLE|LIGHTCACHEFLAGS_ALLOWFAST );
int i;
if ( pNormal )
{
LightDesc_t* pLightDesc = (LightDesc_t*)stackalloc( lightingState.numlights * sizeof(LightDesc_t) );
for ( i=0; i < lightingState.numlights; ++i )
{
// Construct a world light representing the dynamic light
// we're making a static list here because the lighting state
// contains a set of pointers to dynamic lights
WorldLightToMaterialLight( lightingState.locallight[i], pLightDesc[i] );
}
g_pStudioRender->ComputeLighting( lightingState.r_boxcolor, lightingState.numlights, pLightDesc, pt, *pNormal, color );
}
else
{
Vector direction;
for ( i = 0; i < lightingState.numlights; ++i )
{
if ( IsDynamicLight( lightingState.locallight[i] ) )
continue;
float ratio = LightIntensityAndDirectionAtPoint( lightingState.locallight[i], NULL, pt, LIGHT_NO_OCCLUSION_CHECK, NULL, &direction );
float angularRatio = Engine_WorldLightAngle( lightingState.locallight[i], lightingState.locallight[i]->normal, direction, direction );
AddWorldLightToLightCube( lightingState.locallight[i], lightingState.r_boxcolor, direction, ratio * angularRatio );
}
color.Init( 0, 0, 0 );
for ( i = 0; i < 6; ++i )
{
color += lightingState.r_boxcolor[i];
}
color /= 6.0f;
}
// If they want the colors for each box side, give it to them.
if ( pBoxColors )
{
memcpy( pBoxColors, lightingState.r_boxcolor, sizeof( lightingState.r_boxcolor ) );
}
if (bClamp)
{
if (color.x > 1.0f)
color.x = 1.0f;
if (color.y > 1.0f)
color.y = 1.0f;
if (color.z > 1.0f)
color.z = 1.0f;
}
}
static const byte *s_pDLightVis = NULL;
// All dlights that affect a static prop must mark that static prop every frame.
class MarkStaticPropLightsEmumerator : public IPartitionEnumerator
{
public:
void SetLightID( int nLightID )
{
m_nLightID = nLightID;
}
virtual IterationRetval_t EnumElement( IHandleEntity *pHandleEntity )
{
Assert( StaticPropMgr()->IsStaticProp( pHandleEntity ) );
PropLightcache_t *pCache =
( PropLightcache_t * )StaticPropMgr()->GetLightCacheHandleForStaticProp( pHandleEntity );
if ( !pCache )
{
return ITERATION_CONTINUE;
}
if( !s_pDLightVis )
{
s_pDLightVis = CM_ClusterPVS( CM_LeafCluster( CM_PointLeafnum( cl_dlights[m_nLightID].origin ) ) );
}
if( !StaticPropMgr()->IsPropInPVS( pHandleEntity, s_pDLightVis ) )
{
return ITERATION_CONTINUE;
}
if ( !pCache )
{
return ITERATION_CONTINUE;
}
#ifdef _DEBUG
if( r_drawlightcache.GetInt() == 4 )
{
Vector mins( -5, -5, -5 );
Vector maxs( 5, 5, 5 );
CDebugOverlay::AddLineOverlay( cl_dlights[m_nLightID].origin, pCache->m_LightingOrigin, 0, 0, 255, 255, true, 0.001f );
CDebugOverlay::AddBoxOverlay( pCache->m_LightingOrigin, mins, maxs, vec3_angle, 255, 0, 0, 0, 0.001f );
}
#endif
pCache->m_DLightActive |= ( 1 << m_nLightID );
pCache->m_DLightMarkFrame = r_framecount;
return ITERATION_CONTINUE;
}
private:
int m_nLightID;
};
static MarkStaticPropLightsEmumerator s_MarkStaticPropLightsEnumerator;
void MarkDLightsOnStaticProps( void )
{
if ( !g_bActiveDlights )
return;
dlight_t *l = cl_dlights;
for (int i=0 ; i<MAX_DLIGHTS ; i++, l++)
{
if (l->flags & (DLIGHT_NO_MODEL_ILLUMINATION | DLIGHT_DISPLACEMENT_MASK))
continue;
if (l->die < cl.GetTime() || !l->IsRadiusGreaterThanZero() )
continue;
// If the light's not active, then continue
if ( (r_dlightactive & (1 << i)) == 0 )
continue;
#ifdef _DEBUG
if( r_drawlightcache.GetInt() == 4 )
{
Vector mins( -5, -5, -5 );
Vector maxs( 5, 5, 5 );
CDebugOverlay::AddBoxOverlay( l->origin, mins, maxs, vec3_angle, 255, 255, 255, 0, 0.001f );
}
#endif
s_pDLightVis = NULL;
s_MarkStaticPropLightsEnumerator.SetLightID( i );
SpatialPartition()->EnumerateElementsInSphere( PARTITION_ENGINE_STATIC_PROPS,
l->origin, l->GetRadius(), true, &s_MarkStaticPropLightsEnumerator );
}
}
float g_flMinLightingValue = 1.0f;
void InitDLightGlobals( int nMapVersion )
{
if( nMapVersion >= 20 )
{
// The light level at which we are close enough to black to treat as black for
// culling purposes.
g_flMinLightingValue = 1.0f / 256.0f;
}
else
{
// This is the broken value from HL2. It is supposed to be
// the light level at which we are close enough to black to treat as black for
// culling purposes. We leave it at the broken value here for old bsp files
// Since HL2 maps were compiled with this bsp version.
g_flMinLightingValue = 20.0f / 256.0f;
}
}