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238 lines
6.7 KiB
238 lines
6.7 KiB
![]()
4 years ago
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: Dynamic light
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//
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// $Workfile: $
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// $Date: $
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// $NoKeywords: $
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//=============================================================================//
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#include "cbase.h"
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#include "dlight.h"
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#include "iefx.h"
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#include "iviewrender.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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#if HL2_EPISODIC
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// In Episodic we unify the NO_WORLD_ILLUMINATION lights to use
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// the more efficient elight structure instead. This should theoretically
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// be extended to other projects but may have unintended consequences
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// and bears more thorough testing.
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//
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// For an earlier iteration on this technique see changelist 214433,
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// which had a specific flag for use of elights.
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#define DLIGHT_NO_WORLD_USES_ELIGHT 1
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#endif
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//-----------------------------------------------------------------------------
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// A dynamic light, with the goofy hack needed for spotlights
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//-----------------------------------------------------------------------------
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class C_DynamicLight : public C_BaseEntity
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{
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public:
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DECLARE_CLASS( C_DynamicLight, C_BaseEntity );
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DECLARE_CLIENTCLASS();
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C_DynamicLight();
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public:
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void OnDataChanged(DataUpdateType_t updateType);
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bool ShouldDraw();
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void ClientThink( void );
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void Release( void );
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unsigned char m_Flags;
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unsigned char m_LightStyle;
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float m_Radius;
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int m_Exponent;
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float m_InnerAngle;
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float m_OuterAngle;
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float m_SpotRadius;
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private:
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dlight_t* m_pDynamicLight;
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dlight_t* m_pSpotlightEnd;
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inline bool ShouldBeElight() { return (m_Flags & DLIGHT_NO_WORLD_ILLUMINATION); }
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};
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IMPLEMENT_CLIENTCLASS_DT(C_DynamicLight, DT_DynamicLight, CDynamicLight)
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RecvPropInt (RECVINFO(m_Flags)),
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RecvPropInt (RECVINFO(m_LightStyle)),
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RecvPropFloat (RECVINFO(m_Radius)),
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RecvPropInt (RECVINFO(m_Exponent)),
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RecvPropFloat (RECVINFO(m_InnerAngle)),
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RecvPropFloat (RECVINFO(m_OuterAngle)),
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RecvPropFloat (RECVINFO(m_SpotRadius)),
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END_RECV_TABLE()
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//------------------------------------------------------------------------------
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// Purpose :
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//------------------------------------------------------------------------------
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C_DynamicLight::C_DynamicLight(void) : m_pSpotlightEnd(0), m_pDynamicLight(0)
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{
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}
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//------------------------------------------------------------------------------
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// Purpose :
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//------------------------------------------------------------------------------
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void C_DynamicLight::OnDataChanged(DataUpdateType_t updateType)
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{
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if ( updateType == DATA_UPDATE_CREATED )
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{
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SetNextClientThink(gpGlobals->curtime + 0.05);
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}
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BaseClass::OnDataChanged( updateType );
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}
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//------------------------------------------------------------------------------
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// Purpose :
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//------------------------------------------------------------------------------
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bool C_DynamicLight::ShouldDraw()
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{
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return false;
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}
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//------------------------------------------------------------------------------
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// Purpose : Disable drawing of this light when entity perishes
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//------------------------------------------------------------------------------
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void C_DynamicLight::Release()
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{
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if (m_pDynamicLight)
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{
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m_pDynamicLight->die = gpGlobals->curtime;
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m_pDynamicLight = 0;
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}
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if (m_pSpotlightEnd)
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{
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m_pSpotlightEnd->die = gpGlobals->curtime;
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m_pSpotlightEnd = 0;
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}
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BaseClass::Release();
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}
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//------------------------------------------------------------------------------
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// Purpose :
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//------------------------------------------------------------------------------
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void C_DynamicLight::ClientThink(void)
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{
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Vector forward;
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AngleVectors( GetAbsAngles(), &forward );
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if ( (m_Flags & DLIGHT_NO_MODEL_ILLUMINATION) == 0 )
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{
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// Deal with the model light
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if ( !m_pDynamicLight || (m_pDynamicLight->key != index) )
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{
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#if DLIGHT_NO_WORLD_USES_ELIGHT
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m_pDynamicLight = ShouldBeElight() != 0
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? effects->CL_AllocElight( index )
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: effects->CL_AllocDlight( index );
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#else
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m_pDynamicLight = effects->CL_AllocDlight( index );
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#endif
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Assert (m_pDynamicLight);
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m_pDynamicLight->minlight = 0;
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}
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m_pDynamicLight->style = m_LightStyle;
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m_pDynamicLight->radius = m_Radius;
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m_pDynamicLight->flags = m_Flags;
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if ( m_OuterAngle > 0 )
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m_pDynamicLight->flags |= DLIGHT_NO_WORLD_ILLUMINATION;
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m_pDynamicLight->color.r = m_clrRender->r;
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m_pDynamicLight->color.g = m_clrRender->g;
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m_pDynamicLight->color.b = m_clrRender->b;
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m_pDynamicLight->color.exponent = m_Exponent; // this makes it match the world
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m_pDynamicLight->origin = GetAbsOrigin();
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m_pDynamicLight->m_InnerAngle = m_InnerAngle;
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m_pDynamicLight->m_OuterAngle = m_OuterAngle;
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m_pDynamicLight->die = gpGlobals->curtime + 1e6;
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m_pDynamicLight->m_Direction = forward;
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}
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else
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{
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// In this case, the m_Flags could have changed; which is how we turn the light off
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if (m_pDynamicLight)
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{
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m_pDynamicLight->die = gpGlobals->curtime;
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m_pDynamicLight = 0;
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}
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}
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#if DLIGHT_NO_WORLD_USES_ELIGHT
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if (( m_OuterAngle > 0 ) && !ShouldBeElight())
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#else
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if (( m_OuterAngle > 0 ) && ((m_Flags & DLIGHT_NO_WORLD_ILLUMINATION) == 0))
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#endif
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{
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// Raycast to where the endpoint goes
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// Deal with the environment light
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if ( !m_pSpotlightEnd || (m_pSpotlightEnd->key != -index) )
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{
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m_pSpotlightEnd = effects->CL_AllocDlight( -index );
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Assert (m_pSpotlightEnd);
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}
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// Trace a line outward, don't use hitboxes (too slow)
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Vector end;
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VectorMA( GetAbsOrigin(), m_Radius, forward, end );
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trace_t pm;
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C_BaseEntity::PushEnableAbsRecomputations( false ); // HACK don't recompute positions while doing RayTrace
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UTIL_TraceLine( GetAbsOrigin(), end, MASK_NPCWORLDSTATIC, NULL, COLLISION_GROUP_NONE, &pm );
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C_BaseEntity::PopEnableAbsRecomputations();
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VectorCopy( pm.endpos, m_pSpotlightEnd->origin );
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if (pm.fraction == 1.0f)
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{
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m_pSpotlightEnd->die = gpGlobals->curtime;
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m_pSpotlightEnd = 0;
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}
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else
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{
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float falloff = 1.0 - pm.fraction;
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falloff *= falloff;
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m_pSpotlightEnd->style = m_LightStyle;
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m_pSpotlightEnd->flags = DLIGHT_NO_MODEL_ILLUMINATION | (m_Flags & DLIGHT_DISPLACEMENT_MASK);
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m_pSpotlightEnd->radius = m_SpotRadius; // * falloff;
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m_pSpotlightEnd->die = gpGlobals->curtime + 1e6;
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m_pSpotlightEnd->color.r = m_clrRender->r * falloff;
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m_pSpotlightEnd->color.g = m_clrRender->g * falloff;
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m_pSpotlightEnd->color.b = m_clrRender->b * falloff;
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m_pSpotlightEnd->color.exponent = m_Exponent;
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// For bumped lighting
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m_pSpotlightEnd->m_Direction = forward;
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// Update list of surfaces we influence
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render->TouchLight( m_pSpotlightEnd );
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}
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}
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else
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{
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// In this case, the m_Flags could have changed; which is how we turn the light off
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if (m_pSpotlightEnd)
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{
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m_pSpotlightEnd->die = gpGlobals->curtime;
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m_pSpotlightEnd = 0;
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}
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}
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SetNextClientThink(gpGlobals->curtime + 0.001);
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}
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