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Fix for flares. Can be enabled by setting r_flares 1
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7aed801011
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5 changed files with 121 additions and 86 deletions
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@ -75,6 +75,7 @@ typedef struct flare_s {
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int windowX, windowY;
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float eyeZ;
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vec3_t origin;
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vec3_t color;
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} flare_t;
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@ -83,6 +84,8 @@ typedef struct flare_s {
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flare_t r_flareStructs[MAX_FLARES];
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flare_t *r_activeFlares, *r_inactiveFlares;
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int flareCoeff;
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/*
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==================
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R_ClearFlares
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@ -113,11 +116,22 @@ void RB_AddFlare( void *surface, int fogNum, vec3_t point, vec3_t color, vec3_t
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int i;
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flare_t *f, *oldest;
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vec3_t local;
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float d;
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float d = 1;
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vec4_t eye, clip, normalized, window;
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backEnd.pc.c_flareAdds++;
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if(normal && (normal[0] || normal[1] || normal[2]))
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{
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VectorSubtract( backEnd.viewParms.or.origin, point, local );
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VectorNormalizeFast(local);
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d = DotProduct(local, normal);
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// If the viewer is behind the flare don't add it.
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if(d < 0)
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return;
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}
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// if the point is off the screen, don't bother adding it
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// calculate screen coordinates and depth
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R_TransformModelToClip( point, backEnd.or.modelMatrix,
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@ -171,16 +185,12 @@ void RB_AddFlare( void *surface, int fogNum, vec3_t point, vec3_t color, vec3_t
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f->addedFrame = backEnd.viewParms.frameCount;
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f->fogNum = fogNum;
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VectorCopy(point, f->origin);
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VectorCopy( color, f->color );
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// fade the intensity of the flare down as the
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// light surface turns away from the viewer
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if ( normal ) {
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VectorSubtract( backEnd.viewParms.or.origin, point, local );
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VectorNormalizeFast( local );
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d = DotProduct( local, normal );
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VectorScale( f->color, d, f->color );
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}
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VectorScale( f->color, d, f->color );
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// save info needed to test
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f->windowX = backEnd.viewParms.viewportX + window[0];
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@ -197,31 +207,39 @@ RB_AddDlightFlares
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void RB_AddDlightFlares( void ) {
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dlight_t *l;
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int i, j, k;
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fog_t *fog;
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fog_t *fog = NULL;
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if ( !r_flares->integer ) {
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return;
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}
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l = backEnd.refdef.dlights;
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fog = tr.world->fogs;
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if(tr.world)
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fog = tr.world->fogs;
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for (i=0 ; i<backEnd.refdef.num_dlights ; i++, l++) {
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// find which fog volume the light is in
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for ( j = 1 ; j < tr.world->numfogs ; j++ ) {
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fog = &tr.world->fogs[j];
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for ( k = 0 ; k < 3 ; k++ ) {
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if ( l->origin[k] < fog->bounds[0][k] || l->origin[k] > fog->bounds[1][k] ) {
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if(fog)
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{
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// find which fog volume the light is in
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for ( j = 1 ; j < tr.world->numfogs ; j++ ) {
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fog = &tr.world->fogs[j];
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for ( k = 0 ; k < 3 ; k++ ) {
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if ( l->origin[k] < fog->bounds[0][k] || l->origin[k] > fog->bounds[1][k] ) {
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break;
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}
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}
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if ( k == 3 ) {
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break;
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}
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}
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if ( k == 3 ) {
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break;
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if ( j == tr.world->numfogs ) {
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j = 0;
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}
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}
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if ( j == tr.world->numfogs ) {
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else
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j = 0;
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}
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RB_AddFlare( (void *)l, j, l->origin, l->color, NULL );
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}
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@ -294,16 +312,61 @@ void RB_RenderFlare( flare_t *f ) {
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float size;
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vec3_t color;
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int iColor[3];
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float distance, intensity, factor;
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byte fogFactors[3] = {255, 255, 255};
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backEnd.pc.c_flareRenders++;
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VectorScale( f->color, f->drawIntensity*tr.identityLight, color );
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iColor[0] = color[0] * 255;
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iColor[1] = color[1] * 255;
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iColor[2] = color[2] * 255;
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// We don't want too big values anyways when dividing by distance.
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if(f->eyeZ > -1.0f)
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distance = 1.0f;
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else
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distance = -f->eyeZ;
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size = backEnd.viewParms.viewportWidth * ( r_flareSize->value/640.0f + 8 / -f->eyeZ );
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// calculate the flare size..
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size = backEnd.viewParms.viewportWidth * ( r_flareSize->value/640.0f + 8 / distance );
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/*
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* This is an alternative to intensity scaling. It changes the size of the flare on screen instead
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* with growing distance. See in the description at the top why this is not the way to go.
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// size will change ~ 1/r.
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size = backEnd.viewParms.viewportWidth * (r_flareSize->value / (distance * -2.0f));
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*/
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/*
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* As flare sizes stay nearly constant with increasing distance we must decrease the intensity
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* to achieve a reasonable visual result. The intensity is ~ (size^2 / distance^2) which can be
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* got by considering the ratio of
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* (flaresurface on screen) : (Surface of sphere defined by flare origin and distance from flare)
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* An important requirement is:
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* intensity <= 1 for all distances.
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*
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* The formula used here to compute the intensity is as follows:
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* intensity = flareCoeff * size^2 / (distance + size*sqrt(flareCoeff))^2
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* As you can see, the intensity will have a max. of 1 when the distance is 0.
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* The coefficient flareCoeff will determine the falloff speed with increasing distance.
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*/
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factor = distance + size * sqrt(flareCoeff);
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intensity = flareCoeff * size * size / (factor * factor);
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VectorScale(f->color, f->drawIntensity * tr.identityLight * intensity, color);
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// Calculations for fogging
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if(f->fogNum)
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{
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tess.numVertexes = 1;
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VectorCopy(f->origin, tess.xyz[0]);
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tess.fogNum = f->fogNum;
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RB_CalcModulateColorsByFog(fogFactors);
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}
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iColor[0] = color[0] * fogFactors[0];
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iColor[1] = color[1] * fogFactors[1];
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iColor[2] = color[2] * fogFactors[2];
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RB_BeginSurface( tr.flareShader, f->fogNum );
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// FIXME: use quadstamp?
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@ -382,6 +445,21 @@ void RB_RenderFlares (void) {
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return;
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}
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if(r_flareCoeff->modified)
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{
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if(r_flareCoeff->value == 0.0f)
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flareCoeff = atof(FLARE_STDCOEFF);
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else
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flareCoeff = r_flareCoeff->value;
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r_flareCoeff->modified = qfalse;
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}
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// Reset currentEntity to world so that any previously referenced entities
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// don't have influence on the rendering of these flares (i.e. RF_ renderer flags).
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backEnd.currentEntity = &tr.worldEntity;
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backEnd.or = backEnd.viewParms.world;
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// RB_AddDlightFlares();
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// perform z buffer readback on each flare in this view
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@ -30,6 +30,7 @@ static void GfxInfo_f( void );
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cvar_t *r_flareSize;
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cvar_t *r_flareFade;
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cvar_t *r_flareCoeff;
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cvar_t *r_railWidth;
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cvar_t *r_railCoreWidth;
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@ -997,6 +998,7 @@ void R_Register( void )
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r_flareSize = ri.Cvar_Get ("r_flareSize", "40", CVAR_CHEAT);
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r_flareFade = ri.Cvar_Get ("r_flareFade", "7", CVAR_CHEAT);
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r_flareCoeff = ri.Cvar_Get ("r_flareCoeff", FLARE_STDCOEFF, CVAR_CHEAT);
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r_showSmp = ri.Cvar_Get ("r_showSmp", "0", CVAR_CHEAT);
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r_skipBackEnd = ri.Cvar_Get ("r_skipBackEnd", "0", CVAR_CHEAT);
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@ -976,6 +976,9 @@ extern glstate_t glState; // outside of TR since it shouldn't be cleared during
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//
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extern cvar_t *r_flareSize;
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extern cvar_t *r_flareFade;
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// coefficient for the flare intensity falloff function.
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#define FLARE_STDCOEFF "150"
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extern cvar_t *r_flareCoeff;
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extern cvar_t *r_railWidth;
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extern cvar_t *r_railCoreWidth;
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@ -3010,6 +3010,17 @@ static void CreateInternalShaders( void ) {
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static void CreateExternalShaders( void ) {
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tr.projectionShadowShader = R_FindShader( "projectionShadow", LIGHTMAP_NONE, qtrue );
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tr.flareShader = R_FindShader( "flareShader", LIGHTMAP_NONE, qtrue );
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// Hack to make fogging work correctly on flares. Fog colors are calculated
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// in tr_flare.c already.
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if(!tr.flareShader->defaultShader)
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{
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int index;
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for(index = 0; index < tr.flareShader->numUnfoggedPasses; index++)
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tr.flareShader->stages[index]->adjustColorsForFog = ACFF_NONE;
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}
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tr.sunShader = R_FindShader( "sun", LIGHTMAP_NONE, qtrue );
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}
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@ -1214,71 +1214,12 @@ void RB_SurfaceBad( surfaceType_t *surfType ) {
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ri.Printf( PRINT_ALL, "Bad surface tesselated.\n" );
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}
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#if 0
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void RB_SurfaceFlare( srfFlare_t *surf ) {
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vec3_t left, up;
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float radius;
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byte color[4];
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vec3_t dir;
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vec3_t origin;
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float d;
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// calculate the xyz locations for the four corners
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radius = 30;
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VectorScale( backEnd.viewParms.or.axis[1], radius, left );
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VectorScale( backEnd.viewParms.or.axis[2], radius, up );
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if ( backEnd.viewParms.isMirror ) {
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VectorSubtract( vec3_origin, left, left );
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}
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color[0] = color[1] = color[2] = color[3] = 255;
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VectorMA( surf->origin, 3, surf->normal, origin );
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VectorSubtract( origin, backEnd.viewParms.or.origin, dir );
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VectorNormalize( dir );
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VectorMA( origin, r_ignore->value, dir, origin );
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d = -DotProduct( dir, surf->normal );
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if ( d < 0 ) {
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return;
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}
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#if 0
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color[0] *= d;
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color[1] *= d;
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color[2] *= d;
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#endif
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RB_AddQuadStamp( origin, left, up, color );
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void RB_SurfaceFlare(srfFlare_t *surf)
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{
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if (r_flares->integer)
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RB_AddFlare(surf, tess.fogNum, surf->origin, surf->color, surf->normal);
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}
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#else
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void RB_SurfaceFlare( srfFlare_t *surf ) {
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#if 0
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vec3_t left, up;
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byte color[4];
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color[0] = surf->color[0] * 255;
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color[1] = surf->color[1] * 255;
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color[2] = surf->color[2] * 255;
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color[3] = 255;
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VectorClear( left );
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VectorClear( up );
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left[0] = r_ignore->value;
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up[1] = r_ignore->value;
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RB_AddQuadStampExt( surf->origin, left, up, color, 0, 0, 1, 1 );
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#endif
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}
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#endif
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void RB_SurfaceDisplayList( srfDisplayList_t *surf ) {
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// all apropriate state must be set in RB_BeginSurface
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// this isn't implemented yet...
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