296 lines
7.9 KiB
296 lines
7.9 KiB
/* |
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cl_part.c - particles and tracers |
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Copyright (C) 2010 Uncle Mike |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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*/ |
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#include "gl_local.h" |
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#include "r_efx.h" |
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#include "event_flags.h" |
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#include "entity_types.h" |
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#include "triangleapi.h" |
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#include "pm_local.h" |
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#include "cl_tent.h" |
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#include "studio.h" |
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static float gTracerSize[11] = { 1.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f }; |
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static color24 gTracerColors[] = |
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{ |
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{ 255, 255, 255 }, // White |
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{ 255, 0, 0 }, // Red |
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{ 0, 255, 0 }, // Green |
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{ 0, 0, 255 }, // Blue |
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{ 0, 0, 0 }, // Tracer default, filled in from cvars, etc. |
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{ 255, 167, 17 }, // Yellow-orange sparks |
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{ 255, 130, 90 }, // Yellowish streaks (garg) |
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{ 55, 60, 144 }, // Blue egon streak |
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{ 255, 130, 90 }, // More Yellowish streaks (garg) |
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{ 255, 140, 90 }, // More Yellowish streaks (garg) |
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{ 200, 130, 90 }, // More red streaks (garg) |
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{ 255, 120, 70 }, // Darker red streaks (garg) |
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}; |
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/* |
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================ |
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CL_DrawParticles |
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update particle color, position, free expired and draw it |
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================ |
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*/ |
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void CL_DrawParticles( double frametime, particle_t *cl_active_particles, float partsize ) |
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{ |
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particle_t *p; |
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vec3_t right, up; |
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color24 *pColor; |
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int alpha; |
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float size; |
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if( !cl_active_particles ) |
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return; // nothing to draw? |
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pglEnable( GL_BLEND ); |
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pglDisable( GL_ALPHA_TEST ); |
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pglBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); |
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GL_Bind( XASH_TEXTURE0, tr.particleTexture ); |
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pglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ); |
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pglDepthMask( GL_FALSE ); |
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pglBegin( GL_QUADS ); |
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for( p = cl_active_particles; p; p = p->next ) |
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{ |
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if(( p->type != pt_blob ) || ( p->packedColor == 255 )) |
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{ |
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size = partsize; // get initial size of particle |
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// scale up to keep particles from disappearing |
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size += (p->org[0] - RI.vieworg[0]) * RI.cull_vforward[0]; |
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size += (p->org[1] - RI.vieworg[1]) * RI.cull_vforward[1]; |
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size += (p->org[2] - RI.vieworg[2]) * RI.cull_vforward[2]; |
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if( size < 20.0f ) size = partsize; |
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else size = partsize + size * 0.002f; |
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// scale the axes by radius |
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VectorScale( RI.cull_vright, size, right ); |
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VectorScale( RI.cull_vup, size, up ); |
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p->color = bound( 0, p->color, 255 ); |
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pColor = gEngfuncs.CL_GetPaletteColor( p->color ); |
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alpha = 255 * (p->die - gpGlobals->time) * 16.0f; |
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if( alpha > 255 || p->type == pt_static ) |
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alpha = 255; |
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pglColor4ub( gEngfuncs.LightToTexGamma( pColor->r ), |
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gEngfuncs.LightToTexGamma( pColor->g ), |
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gEngfuncs.LightToTexGamma( pColor->b ), alpha ); |
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pglTexCoord2f( 0.0f, 1.0f ); |
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pglVertex3f( p->org[0] - right[0] + up[0], p->org[1] - right[1] + up[1], p->org[2] - right[2] + up[2] ); |
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pglTexCoord2f( 0.0f, 0.0f ); |
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pglVertex3f( p->org[0] + right[0] + up[0], p->org[1] + right[1] + up[1], p->org[2] + right[2] + up[2] ); |
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pglTexCoord2f( 1.0f, 0.0f ); |
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pglVertex3f( p->org[0] + right[0] - up[0], p->org[1] + right[1] - up[1], p->org[2] + right[2] - up[2] ); |
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pglTexCoord2f( 1.0f, 1.0f ); |
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pglVertex3f( p->org[0] - right[0] - up[0], p->org[1] - right[1] - up[1], p->org[2] - right[2] - up[2] ); |
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r_stats.c_particle_count++; |
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} |
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gEngfuncs.CL_ThinkParticle( frametime, p ); |
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} |
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pglEnd(); |
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pglDepthMask( GL_TRUE ); |
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} |
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/* |
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================ |
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CL_CullTracer |
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check tracer bbox |
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================ |
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*/ |
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static qboolean CL_CullTracer( particle_t *p, const vec3_t start, const vec3_t end ) |
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{ |
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vec3_t mins, maxs; |
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int i; |
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// compute the bounding box |
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for( i = 0; i < 3; i++ ) |
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{ |
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if( start[i] < end[i] ) |
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{ |
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mins[i] = start[i]; |
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maxs[i] = end[i]; |
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} |
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else |
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{ |
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mins[i] = end[i]; |
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maxs[i] = start[i]; |
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} |
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// don't let it be zero sized |
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if( mins[i] == maxs[i] ) |
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{ |
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maxs[i] += gTracerSize[p->type] * 2.0f; |
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} |
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} |
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// check bbox |
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return R_CullBox( mins, maxs ); |
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} |
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/* |
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================ |
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CL_DrawTracers |
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update tracer color, position, free expired and draw it |
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================ |
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*/ |
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void CL_DrawTracers( double frametime, particle_t *cl_active_tracers ) |
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{ |
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float scale, atten, gravity; |
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vec3_t screenLast, screen; |
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vec3_t start, end, delta; |
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particle_t *p; |
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// update tracer color if this is changed |
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if( FBitSet( tracerred->flags|tracergreen->flags|tracerblue->flags|traceralpha->flags, FCVAR_CHANGED )) |
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{ |
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color24 *customColors = &gTracerColors[4]; |
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customColors->r = (byte)(tracerred->value * traceralpha->value * 255); |
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customColors->g = (byte)(tracergreen->value * traceralpha->value * 255); |
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customColors->b = (byte)(tracerblue->value * traceralpha->value * 255); |
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ClearBits( tracerred->flags, FCVAR_CHANGED ); |
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ClearBits( tracergreen->flags, FCVAR_CHANGED ); |
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ClearBits( tracerblue->flags, FCVAR_CHANGED ); |
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ClearBits( traceralpha->flags, FCVAR_CHANGED ); |
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} |
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if( !cl_active_tracers ) |
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return; // nothing to draw? |
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if( !TriSpriteTexture( gEngfuncs.GetDefaultSprite( REF_DOT_SPRITE ), 0 )) |
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return; |
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pglEnable( GL_BLEND ); |
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pglBlendFunc( GL_SRC_ALPHA, GL_ONE ); |
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pglDisable( GL_ALPHA_TEST ); |
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pglDepthMask( GL_FALSE ); |
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gravity = frametime * MOVEVARS->gravity; |
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scale = 1.0 - (frametime * 0.9); |
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if( scale < 0.0f ) scale = 0.0f; |
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for( p = cl_active_tracers; p; p = p->next ) |
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{ |
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atten = (p->die - gpGlobals->time); |
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if( atten > 0.1f ) atten = 0.1f; |
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VectorScale( p->vel, ( p->ramp * atten ), delta ); |
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VectorAdd( p->org, delta, end ); |
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VectorCopy( p->org, start ); |
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if( !CL_CullTracer( p, start, end )) |
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{ |
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vec3_t verts[4], tmp2; |
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vec3_t tmp, normal; |
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color24 *pColor; |
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// Transform point into screen space |
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TriWorldToScreen( start, screen ); |
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TriWorldToScreen( end, screenLast ); |
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// build world-space normal to screen-space direction vector |
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VectorSubtract( screen, screenLast, tmp ); |
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// we don't need Z, we're in screen space |
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tmp[2] = 0; |
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VectorNormalize( tmp ); |
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// build point along noraml line (normal is -y, x) |
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VectorScale( RI.cull_vup, tmp[0] * gTracerSize[p->type], normal ); |
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VectorScale( RI.cull_vright, -tmp[1] * gTracerSize[p->type], tmp2 ); |
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VectorSubtract( normal, tmp2, normal ); |
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// compute four vertexes |
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VectorSubtract( start, normal, verts[0] ); |
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VectorAdd( start, normal, verts[1] ); |
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VectorAdd( verts[0], delta, verts[2] ); |
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VectorAdd( verts[1], delta, verts[3] ); |
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if( p->color > sizeof( gTracerColors ) / sizeof( color24 ) ) |
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{ |
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gEngfuncs.Con_Printf( S_ERROR "UserTracer with color > %d\n", sizeof( gTracerColors ) / sizeof( color24 )); |
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p->color = 0; |
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} |
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pColor = &gTracerColors[p->color]; |
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pglColor4ub( pColor->r, pColor->g, pColor->b, p->packedColor ); |
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pglBegin( GL_QUADS ); |
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pglTexCoord2f( 0.0f, 0.8f ); |
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pglVertex3fv( verts[2] ); |
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pglTexCoord2f( 1.0f, 0.8f ); |
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pglVertex3fv( verts[3] ); |
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pglTexCoord2f( 1.0f, 0.0f ); |
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pglVertex3fv( verts[1] ); |
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pglTexCoord2f( 0.0f, 0.0f ); |
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pglVertex3fv( verts[0] ); |
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pglEnd(); |
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} |
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// evaluate position |
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VectorMA( p->org, frametime, p->vel, p->org ); |
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if( p->type == pt_grav ) |
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{ |
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p->vel[0] *= scale; |
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p->vel[1] *= scale; |
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p->vel[2] -= gravity; |
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p->packedColor = 255 * (p->die - gpGlobals->time) * 2; |
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if( p->packedColor > 255 ) p->packedColor = 255; |
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} |
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else if( p->type == pt_slowgrav ) |
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{ |
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p->vel[2] = gravity * 0.05f; |
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} |
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} |
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pglDepthMask( GL_TRUE ); |
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} |
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/* |
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=============== |
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CL_DrawParticlesExternal |
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allow to draw effects from custom renderer |
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=============== |
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*/ |
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void CL_DrawParticlesExternal( const ref_viewpass_t *rvp, qboolean trans_pass, float frametime ) |
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{ |
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ref_instance_t oldRI = RI; |
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memcpy( &oldRI, &RI, sizeof( ref_instance_t )); |
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R_SetupRefParams( rvp ); |
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R_SetupFrustum(); |
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R_SetupGL( false ); // don't touch GL-states |
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tr.frametime = frametime; |
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gEngfuncs.CL_DrawEFX( frametime, trans_pass ); |
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// restore internal state |
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memcpy( &RI, &oldRI, sizeof( ref_instance_t )); |
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}
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