/*
==================
RB_RenderFlare
==================
*/
void RB_RenderFlare( flare_t *f ) {
float size;
vec3_t color;
int iColor[3];
float distance, intensity, factor;
byte fogFactors[3] = {255, 255, 255};
backEnd.pc.c_flareRenders++;
// We don't want too big values anyways when dividing by distance.
if(f->eyeZ > -1.0f)
distance = 1.0f;
else
distance = -f->eyeZ;
// calculate the flare size..
size = backEnd.viewParms.viewportWidth * ( r_flareSize->value/640.0f + 8 / distance );
/*
* This is an alternative to intensity scaling. It changes the size of the flare on screen instead
* with growing distance. See in the description at the top why this is not the way to go.
// size will change ~ 1/r.
size = backEnd.viewParms.viewportWidth * (r_flareSize->value / (distance * -2.0f));
*/
/*
* As flare sizes stay nearly constant with increasing distance we must decrease the intensity
* to achieve a reasonable visual result. The intensity is ~ (size^2 / distance^2) which can be
* got by considering the ratio of
* (flaresurface on screen) : (Surface of sphere defined by flare origin and distance from flare)
* An important requirement is:
* intensity <= 1 for all distances.
*
* The formula used here to compute the intensity is as follows:
* intensity = flareCoeff * size^2 / (distance + size*sqrt(flareCoeff))^2
* As you can see, the intensity will have a max. of 1 when the distance is 0.
* The coefficient flareCoeff will determine the falloff speed with increasing distance.
*/
factor = distance + size * sqrt(flareCoeff);
intensity = flareCoeff * size * size / (factor * factor);
VectorScale(f->color, f->drawIntensity * intensity, color);
// Calculations for fogging
if(tr.world && f->fogNum < tr.world->numfogs)
{
tess.numVertexes = 1;
VectorCopy(f->origin, tess.xyz[0]);
tess.fogNum = f->fogNum;
RB_CalcModulateColorsByFog(fogFactors);
// We don't need to render the flare if colors are 0 anyways.
if(!(fogFactors[0] || fogFactors[1] || fogFactors[2]))
return;
}
iColor[0] = color[0] * fogFactors[0];
iColor[1] = color[1] * fogFactors[1];
iColor[2] = color[2] * fogFactors[2];
RB_BeginSurface( tr.flareShader, f->fogNum );
// FIXME: use quadstamp?
tess.xyz[tess.numVertexes][0] = f->windowX - size;
tess.xyz[tess.numVertexes][1] = f->windowY - size;
tess.texCoords[tess.numVertexes][0][0] = 0;
tess.texCoords[tess.numVertexes][0][1] = 0;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX - size;
tess.xyz[tess.numVertexes][1] = f->windowY + size;
tess.texCoords[tess.numVertexes][0][0] = 0;
tess.texCoords[tess.numVertexes][0][1] = 1;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX + size;
tess.xyz[tess.numVertexes][1] = f->windowY + size;
tess.texCoords[tess.numVertexes][0][0] = 1;
tess.texCoords[tess.numVertexes][0][1] = 1;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX + size;
tess.xyz[tess.numVertexes][1] = f->windowY - size;
tess.texCoords[tess.numVertexes][0][0] = 1;
tess.texCoords[tess.numVertexes][0][1] = 0;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.indexes[tess.numIndexes++] = 0;
tess.indexes[tess.numIndexes++] = 1;
tess.indexes[tess.numIndexes++] = 2;
tess.indexes[tess.numIndexes++] = 0;
tess.indexes[tess.numIndexes++] = 2;
tess.indexes[tess.numIndexes++] = 3;
RB_EndSurface();
}
/*
==================
RB_RenderFlare
==================
*/
void RB_RenderFlare( flare_t *f ) {
float size;
vec3_t color;
int iColor[3];
int iAlpha, srcBlend;
float distance, intensity, factor;
byte fogFactors[3] = {255, 255, 255};
backEnd.pc.c_flareRenders++;
// We don't want too big values anyways when dividing by distance.
if(f->eyeZ > -1.0f)
distance = 1.0f;
else
distance = -f->eyeZ;
// calculate the flare size..
size = backEnd.viewParms.viewportWidth * ( ( r_flareSize->value * f->scale )/640.0f + 8 / distance );
/*
* This is an alternative to intensity scaling. It changes the size of the flare on screen instead
* with growing distance. See in the description at the top why this is not the way to go.
// size will change ~ 1/r.
size = backEnd.viewParms.viewportWidth * ( ( r_flareSize->value * f->scale ) / (distance * -2.0f));
*/
/*
* As flare sizes stay nearly constant with increasing distance we must decrease the intensity
* to achieve a reasonable visual result. The intensity is ~ (size^2 / distance^2) which can be
* got by considering the ratio of
* (flaresurface on screen) : (Surface of sphere defined by flare origin and distance from flare)
* An important requirement is:
* intensity <= 1 for all distances.
*
* The formula used here to compute the intensity is as follows:
* intensity = flareCoeff * size^2 / (distance + size*sqrt(flareCoeff))^2
* As you can see, the intensity will have a max. of 1 when the distance is 0.
* The coefficient flareCoeff will determine the falloff speed with increasing distance.
*/
factor = distance + size * sqrt(flareCoeff);
intensity = flareCoeff * size * size / (factor * factor);
// Calculations for RGBA
srcBlend = f->shader->stages[0] ? ( f->shader->stages[0]->stateBits & GLS_SRCBLEND_BITS ) : 0;
if ( srcBlend == GLS_SRCBLEND_ONE ) {
// Q3 flare, fade color. blendfunc GL_ONE GL_ONE
VectorScale(f->color, f->drawIntensity * intensity, color);
iAlpha = 65535;
} else {
// RTCW/ET flare, fade alpha. blendfunc GL_SRC_ALPHA GL_ONE
// Note: RTCW source says it uses alpha blend/fade because overwise it doesn't blend in global fog and to switch back when it's fixed.
VectorScale(f->color, intensity, color);
iAlpha = f->drawIntensity * 255 * 257;
}
// Calculations for fogging
if(tr.world && f->fogNum > 0 && f->fogNum < tr.world->numfogs && !f->shader->noFog)
{
tess.numVertexes = 1;
VectorCopy(f->origin, tess.xyz[0]);
tess.fogNum = f->fogNum;
RB_CalcModulateColorsByFog(fogFactors);
// We don't need to render the flare if colors are 0 anyways.
if(!(fogFactors[0] || fogFactors[1] || fogFactors[2]))
return;
}
iColor[0] = color[0] * fogFactors[0] * 257;
iColor[1] = color[1] * fogFactors[1] * 257;
iColor[2] = color[2] * fogFactors[2] * 257;
// fog calculation already done, use fogNum 0
RB_BeginSurface( f->shader, 0, 0 );
// FIXME: use quadstamp?
tess.xyz[tess.numVertexes][0] = f->windowX - size;
tess.xyz[tess.numVertexes][1] = f->windowY - size;
tess.texCoords[tess.numVertexes][0][0] = 0;
tess.texCoords[tess.numVertexes][0][1] = 0;
tess.color[tess.numVertexes][0] = iColor[0];
tess.color[tess.numVertexes][1] = iColor[1];
tess.color[tess.numVertexes][2] = iColor[2];
tess.color[tess.numVertexes][3] = iAlpha;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX - size;
tess.xyz[tess.numVertexes][1] = f->windowY + size;
tess.texCoords[tess.numVertexes][0][0] = 0;
tess.texCoords[tess.numVertexes][0][1] = 1;
tess.color[tess.numVertexes][0] = iColor[0];
tess.color[tess.numVertexes][1] = iColor[1];
tess.color[tess.numVertexes][2] = iColor[2];
tess.color[tess.numVertexes][3] = iAlpha;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX + size;
tess.xyz[tess.numVertexes][1] = f->windowY + size;
tess.texCoords[tess.numVertexes][0][0] = 1;
tess.texCoords[tess.numVertexes][0][1] = 1;
tess.color[tess.numVertexes][0] = iColor[0];
tess.color[tess.numVertexes][1] = iColor[1];
tess.color[tess.numVertexes][2] = iColor[2];
tess.color[tess.numVertexes][3] = iAlpha;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX + size;
tess.xyz[tess.numVertexes][1] = f->windowY - size;
tess.texCoords[tess.numVertexes][0][0] = 1;
tess.texCoords[tess.numVertexes][0][1] = 0;
tess.color[tess.numVertexes][0] = iColor[0];
tess.color[tess.numVertexes][1] = iColor[1];
tess.color[tess.numVertexes][2] = iColor[2];
tess.color[tess.numVertexes][3] = iAlpha;
tess.numVertexes++;
tess.indexes[tess.numIndexes++] = 0;
tess.indexes[tess.numIndexes++] = 1;
tess.indexes[tess.numIndexes++] = 2;
tess.indexes[tess.numIndexes++] = 0;
tess.indexes[tess.numIndexes++] = 2;
tess.indexes[tess.numIndexes++] = 3;
RB_EndSurface();
}
/*
===============
ComputeColors
===============
*/
static void ComputeColors( shaderStage_t *pStage )
{
int i;
//
// rgbGen
//
switch ( pStage->rgbGen )
{
case CGEN_IDENTITY:
Com_Memset( tess.svars.colors, 0xff, tess.numVertexes * 4 );
break;
default:
case CGEN_IDENTITY_LIGHTING:
Com_Memset( tess.svars.colors, tr.identityLightByte, tess.numVertexes * 4 );
break;
case CGEN_LIGHTING_DIFFUSE:
RB_CalcDiffuseColor( ( unsigned char * ) tess.svars.colors );
break;
case CGEN_EXACT_VERTEX:
Com_Memcpy( tess.svars.colors, tess.vertexColors, tess.numVertexes * sizeof( tess.vertexColors[0] ) );
break;
case CGEN_CONST:
for ( i = 0; i < tess.numVertexes; i++ ) {
*(int *)tess.svars.colors[i] = *(int *)pStage->constantColor;
}
break;
case CGEN_VERTEX:
if ( tr.identityLight == 1 )
{
Com_Memcpy( tess.svars.colors, tess.vertexColors, tess.numVertexes * sizeof( tess.vertexColors[0] ) );
}
else
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = tess.vertexColors[i][0] * tr.identityLight;
tess.svars.colors[i][1] = tess.vertexColors[i][1] * tr.identityLight;
tess.svars.colors[i][2] = tess.vertexColors[i][2] * tr.identityLight;
tess.svars.colors[i][3] = tess.vertexColors[i][3];
}
}
break;
case CGEN_ONE_MINUS_VERTEX:
if ( tr.identityLight == 1 )
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = 255 - tess.vertexColors[i][0];
tess.svars.colors[i][1] = 255 - tess.vertexColors[i][1];
tess.svars.colors[i][2] = 255 - tess.vertexColors[i][2];
}
}
else
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = ( 255 - tess.vertexColors[i][0] ) * tr.identityLight;
tess.svars.colors[i][1] = ( 255 - tess.vertexColors[i][1] ) * tr.identityLight;
tess.svars.colors[i][2] = ( 255 - tess.vertexColors[i][2] ) * tr.identityLight;
}
}
break;
case CGEN_FOG:
{
fog_t *fog;
fog = tr.world->fogs + tess.fogNum;
for ( i = 0; i < tess.numVertexes; i++ ) {
* ( int * )&tess.svars.colors[i] = fog->colorInt;
}
}
break;
case CGEN_WAVEFORM:
RB_CalcWaveColor( &pStage->rgbWave, ( unsigned char * ) tess.svars.colors );
break;
case CGEN_ENTITY:
RB_CalcColorFromEntity( ( unsigned char * ) tess.svars.colors );
break;
case CGEN_ONE_MINUS_ENTITY:
RB_CalcColorFromOneMinusEntity( ( unsigned char * ) tess.svars.colors );
break;
}
//
// alphaGen
//
switch ( pStage->alphaGen )
{
case AGEN_SKIP:
break;
case AGEN_IDENTITY:
if ( pStage->rgbGen != CGEN_IDENTITY ) {
if ( ( pStage->rgbGen == CGEN_VERTEX && tr.identityLight != 1 ) ||
pStage->rgbGen != CGEN_VERTEX ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = 0xff;
}
}
}
break;
case AGEN_CONST:
if ( pStage->rgbGen != CGEN_CONST ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = pStage->constantColor[3];
}
}
break;
case AGEN_WAVEFORM:
RB_CalcWaveAlpha( &pStage->alphaWave, ( unsigned char * ) tess.svars.colors );
break;
case AGEN_LIGHTING_SPECULAR:
RB_CalcSpecularAlpha( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_ENTITY:
RB_CalcAlphaFromEntity( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_ONE_MINUS_ENTITY:
RB_CalcAlphaFromOneMinusEntity( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_VERTEX:
if ( pStage->rgbGen != CGEN_VERTEX ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = tess.vertexColors[i][3];
}
}
break;
case AGEN_ONE_MINUS_VERTEX:
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][3] = 255 - tess.vertexColors[i][3];
}
break;
case AGEN_PORTAL:
{
unsigned char alpha;
for ( i = 0; i < tess.numVertexes; i++ )
{
float len;
vec3_t v;
VectorSubtract( tess.xyz[i], backEnd.viewParms.or.origin, v );
len = VectorLength( v );
len /= tess.shader->portalRange;
if ( len < 0 )
{
alpha = 0;
}
else if ( len > 1 )
{
alpha = 0xff;
}
else
{
alpha = len * 0xff;
}
tess.svars.colors[i][3] = alpha;
}
}
break;
}
//
// fog adjustment for colors to fade out as fog increases
//
if ( tess.fogNum )
{
switch ( pStage->adjustColorsForFog )
{
case ACFF_MODULATE_RGB:
RB_CalcModulateColorsByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_MODULATE_ALPHA:
RB_CalcModulateAlphasByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_MODULATE_RGBA:
RB_CalcModulateRGBAsByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_NONE:
break;
}
}
// if in greyscale rendering mode turn all color values into greyscale.
if(r_greyscale->integer)
{
int scale;
for(i = 0; i < tess.numVertexes; i++)
{
scale = LUMA(tess.svars.colors[i][0], tess.svars.colors[i][1], tess.svars.colors[i][2]);
tess.svars.colors[i][0] = tess.svars.colors[i][1] = tess.svars.colors[i][2] = scale;
}
}
else if(r_greyscale->value)
{
float scale;
for(i = 0; i < tess.numVertexes; i++)
{
scale = LUMA(tess.svars.colors[i][0], tess.svars.colors[i][1], tess.svars.colors[i][2]);
tess.svars.colors[i][0] = LERP(tess.svars.colors[i][0], scale, r_greyscale->value);
tess.svars.colors[i][1] = LERP(tess.svars.colors[i][1], scale, r_greyscale->value);
tess.svars.colors[i][2] = LERP(tess.svars.colors[i][2], scale, r_greyscale->value);
}
}
}
/*
===============
ComputeColors
===============
*/
static void ComputeColors( shaderStage_t *pStage ) {
int i;
//
// rgbGen
//
switch ( pStage->rgbGen )
{
case CGEN_IDENTITY:
memset( tess.svars.colors, 0xff, tess.numVertexes * 4 );
break;
default:
case CGEN_IDENTITY_LIGHTING:
memset( tess.svars.colors, tr.identityLightByte, tess.numVertexes * 4 );
break;
case CGEN_LIGHTING_DIFFUSE:
RB_CalcDiffuseColor( ( unsigned char * ) tess.svars.colors );
break;
case CGEN_EXACT_VERTEX:
memcpy( tess.svars.colors, tess.vertexColors, tess.numVertexes * sizeof( tess.vertexColors[0].v ) );
break;
case CGEN_CONST:
for ( i = 0; i < tess.numVertexes; i++ ) {
*(int *)tess.svars.colors[i] = *(int *)pStage->constantColor;
}
break;
case CGEN_VERTEX:
if ( tr.identityLight == 1 ) {
memcpy( tess.svars.colors, tess.vertexColors, tess.numVertexes * sizeof( tess.vertexColors[0].v ) );
} else
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = tess.vertexColors[i].v[0] * tr.identityLight;
tess.svars.colors[i][1] = tess.vertexColors[i].v[1] * tr.identityLight;
tess.svars.colors[i][2] = tess.vertexColors[i].v[2] * tr.identityLight;
tess.svars.colors[i][3] = tess.vertexColors[i].v[3];
}
}
break;
case CGEN_ONE_MINUS_VERTEX:
if ( tr.identityLight == 1 ) {
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = 255 - tess.vertexColors[i].v[0];
tess.svars.colors[i][1] = 255 - tess.vertexColors[i].v[1];
tess.svars.colors[i][2] = 255 - tess.vertexColors[i].v[2];
}
} else
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = ( 255 - tess.vertexColors[i].v[0] ) * tr.identityLight;
tess.svars.colors[i][1] = ( 255 - tess.vertexColors[i].v[1] ) * tr.identityLight;
tess.svars.colors[i][2] = ( 255 - tess.vertexColors[i].v[2] ) * tr.identityLight;
}
}
break;
case CGEN_FOG:
{
fog_t *fog;
fog = tr.world->fogs + tess.fogNum;
for ( i = 0; i < tess.numVertexes; i++ ) {
*( int * )&tess.svars.colors[i] = fog->shader->fogParms.colorInt;
}
}
break;
case CGEN_WAVEFORM:
RB_CalcWaveColor( &pStage->rgbWave, ( unsigned char * ) tess.svars.colors );
break;
case CGEN_ENTITY:
RB_CalcColorFromEntity( ( unsigned char * ) tess.svars.colors );
break;
case CGEN_ONE_MINUS_ENTITY:
RB_CalcColorFromOneMinusEntity( ( unsigned char * ) tess.svars.colors );
break;
}
//
// alphaGen
//
switch ( pStage->alphaGen )
{
case AGEN_SKIP:
break;
case AGEN_IDENTITY:
if ( pStage->rgbGen != CGEN_IDENTITY ) {
if ( ( pStage->rgbGen == CGEN_VERTEX && tr.identityLight != 1 ) ||
pStage->rgbGen != CGEN_VERTEX ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = 0xff;
}
}
}
break;
case AGEN_CONST:
if ( pStage->rgbGen != CGEN_CONST ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = pStage->constantColor[3];
}
}
break;
case AGEN_WAVEFORM:
RB_CalcWaveAlpha( &pStage->alphaWave, ( unsigned char * ) tess.svars.colors );
break;
case AGEN_LIGHTING_SPECULAR:
RB_CalcSpecularAlpha( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_ENTITY:
RB_CalcAlphaFromEntity( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_ONE_MINUS_ENTITY:
RB_CalcAlphaFromOneMinusEntity( ( unsigned char * ) tess.svars.colors );
break;
// Ridah
case AGEN_NORMALZFADE:
{
float alpha, range, lowest, highest, dot;
vec3_t worldUp;
qboolean zombieEffect = qfalse;
if ( VectorCompare( backEnd.currentEntity->e.fireRiseDir, vec3_origin ) ) {
VectorSet( backEnd.currentEntity->e.fireRiseDir, 0, 0, 1 );
}
if ( backEnd.currentEntity->e.hModel ) { // world surfaces dont have an axis
VectorRotate( backEnd.currentEntity->e.fireRiseDir, backEnd.currentEntity->e.axis, worldUp );
} else {
VectorCopy( backEnd.currentEntity->e.fireRiseDir, worldUp );
}
lowest = pStage->zFadeBounds[0];
if ( lowest == -1000 ) { // use entity alpha
lowest = backEnd.currentEntity->e.shaderTime;
zombieEffect = qtrue;
}
highest = pStage->zFadeBounds[1];
if ( highest == -1000 ) { // use entity alpha
highest = backEnd.currentEntity->e.shaderTime;
zombieEffect = qtrue;
}
range = highest - lowest;
for ( i = 0; i < tess.numVertexes; i++ ) {
dot = DotProduct( tess.normal[i].v, worldUp );
// special handling for Zombie fade effect
if ( zombieEffect ) {
alpha = (float)backEnd.currentEntity->e.shaderRGBA[3] * ( dot + 1.0 ) / 2.0;
alpha += ( 2.0 * (float)backEnd.currentEntity->e.shaderRGBA[3] ) * ( 1.0 - ( dot + 1.0 ) / 2.0 );
if ( alpha > 255.0 ) {
alpha = 255.0;
} else if ( alpha < 0.0 ) {
alpha = 0.0;
}
tess.svars.colors[i][3] = (byte)( alpha );
continue;
}
if ( dot < highest ) {
if ( dot > lowest ) {
if ( dot < lowest + range / 2 ) {
alpha = ( (float)pStage->constantColor[3] * ( ( dot - lowest ) / ( range / 2 ) ) );
} else {
alpha = ( (float)pStage->constantColor[3] * ( 1.0 - ( ( dot - lowest - range / 2 ) / ( range / 2 ) ) ) );
}
if ( alpha > 255.0 ) {
alpha = 255.0;
} else if ( alpha < 0.0 ) {
alpha = 0.0;
}
// finally, scale according to the entity's alpha
if ( backEnd.currentEntity->e.hModel ) {
alpha *= (float)backEnd.currentEntity->e.shaderRGBA[3] / 255.0;
}
tess.svars.colors[i][3] = (byte)( alpha );
} else {
tess.svars.colors[i][3] = 0;
}
} else {
tess.svars.colors[i][3] = 0;
}
}
}
break;
// done.
case AGEN_VERTEX:
if ( pStage->rgbGen != CGEN_VERTEX ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = tess.vertexColors[i].v[3];
}
}
break;
case AGEN_ONE_MINUS_VERTEX:
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][3] = 255 - tess.vertexColors[i].v[3];
}
break;
case AGEN_PORTAL:
{
unsigned char alpha;
for ( i = 0; i < tess.numVertexes; i++ )
{
float len;
vec3_t v;
VectorSubtract( tess.xyz[i].v, backEnd.viewParms.orientation.origin, v );
len = VectorLength( v );
len /= tess.shader->portalRange;
if ( len < 0 ) {
alpha = 0;
} else if ( len > 1 ) {
alpha = 0xff;
} else
{
alpha = len * 0xff;
}
tess.svars.colors[i][3] = alpha;
}
}
break;
}
//
// fog adjustment for colors to fade out as fog increases
//
if ( tess.fogNum && !tess.shader->noFog ) {
switch ( pStage->adjustColorsForFog )
{
case ACFF_MODULATE_RGB:
RB_CalcModulateColorsByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_MODULATE_ALPHA:
RB_CalcModulateAlphasByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_MODULATE_RGBA:
RB_CalcModulateRGBAsByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_NONE:
break;
}
}
}
static void ComputeColors( shaderStage_t *pStage, int forceRGBGen )
{
int i;
color4ub_t *colors = tess.svars.colors;
qboolean killGen = qfalse;
alphaGen_t forceAlphaGen = pStage->alphaGen;//set this up so we can override below
if ( tess.shader != tr.projectionShadowShader && tess.shader != tr.shadowShader &&
( backEnd.currentEntity->e.renderfx & (RF_DISINTEGRATE1|RF_DISINTEGRATE2)))
{
RB_CalcDisintegrateColors( (unsigned char *)tess.svars.colors );
RB_CalcDisintegrateVertDeform();
// We've done some custom alpha and color stuff, so we can skip the rest. Let it do fog though
killGen = qtrue;
}
//
// rgbGen
//
if ( !forceRGBGen )
{
forceRGBGen = pStage->rgbGen;
}
if ( backEnd.currentEntity->e.renderfx & RF_VOLUMETRIC ) // does not work for rotated models, technically, this should also be a CGEN type, but that would entail adding new shader commands....which is too much work for one thing
{
int i;
float *normal, dot;
unsigned char *color;
int numVertexes;
normal = tess.normal[0];
color = tess.svars.colors[0];
numVertexes = tess.numVertexes;
for ( i = 0 ; i < numVertexes ; i++, normal += 4, color += 4)
{
dot = DotProduct( normal, backEnd.refdef.viewaxis[0] );
dot *= dot * dot * dot;
if ( dot < 0.2f ) // so low, so just clamp it
{
dot = 0.0f;
}
color[0] = color[1] = color[2] = color[3] = Q_ftol( backEnd.currentEntity->e.shaderRGBA[0] * (1-dot) );
}
killGen = qtrue;
}
if (killGen)
{
goto avoidGen;
}
//
// rgbGen
//
switch ( forceRGBGen )
{
case CGEN_IDENTITY:
memset( tess.svars.colors, 0xff, tess.numVertexes * 4 );
break;
default:
case CGEN_IDENTITY_LIGHTING:
memset( tess.svars.colors, tr.identityLightByte, tess.numVertexes * 4 );
break;
case CGEN_LIGHTING_DIFFUSE:
RB_CalcDiffuseColor( ( unsigned char * ) tess.svars.colors );
break;
case CGEN_LIGHTING_DIFFUSE_ENTITY:
RB_CalcDiffuseEntityColor( ( unsigned char * ) tess.svars.colors );
if ( forceAlphaGen == AGEN_IDENTITY &&
backEnd.currentEntity->e.shaderRGBA[3] == 0xff
)
{
forceAlphaGen = AGEN_SKIP; //already got it in this set since it does all 4 components
}
break;
case CGEN_EXACT_VERTEX:
memcpy( tess.svars.colors, tess.vertexColors, tess.numVertexes * sizeof( tess.vertexColors[0] ) );
break;
case CGEN_CONST:
for ( i = 0; i < tess.numVertexes; i++ ) {
byteAlias_t *baDest = (byteAlias_t *)&tess.svars.colors[i],
*baSource = (byteAlias_t *)&pStage->constantColor;
baDest->i = baSource->i;
}
break;
case CGEN_VERTEX:
if ( tr.identityLight == 1 )
{
memcpy( tess.svars.colors, tess.vertexColors, tess.numVertexes * sizeof( tess.vertexColors[0] ) );
}
else
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = tess.vertexColors[i][0] * tr.identityLight;
tess.svars.colors[i][1] = tess.vertexColors[i][1] * tr.identityLight;
tess.svars.colors[i][2] = tess.vertexColors[i][2] * tr.identityLight;
tess.svars.colors[i][3] = tess.vertexColors[i][3];
}
}
break;
case CGEN_ONE_MINUS_VERTEX:
if ( tr.identityLight == 1 )
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = 255 - tess.vertexColors[i][0];
tess.svars.colors[i][1] = 255 - tess.vertexColors[i][1];
tess.svars.colors[i][2] = 255 - tess.vertexColors[i][2];
}
}
else
{
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][0] = ( 255 - tess.vertexColors[i][0] ) * tr.identityLight;
tess.svars.colors[i][1] = ( 255 - tess.vertexColors[i][1] ) * tr.identityLight;
tess.svars.colors[i][2] = ( 255 - tess.vertexColors[i][2] ) * tr.identityLight;
}
}
break;
case CGEN_FOG:
{
fog_t *fog;
fog = tr.world->fogs + tess.fogNum;
for ( i = 0; i < tess.numVertexes; i++ ) {
byteAlias_t *ba = (byteAlias_t *)&tess.svars.colors[i];
ba->i = fog->colorInt;
}
}
break;
case CGEN_WAVEFORM:
RB_CalcWaveColor( &pStage->rgbWave, ( unsigned char * ) tess.svars.colors );
break;
case CGEN_ENTITY:
RB_CalcColorFromEntity( ( unsigned char * ) tess.svars.colors );
if ( forceAlphaGen == AGEN_IDENTITY &&
backEnd.currentEntity->e.shaderRGBA[3] == 0xff
)
{
forceAlphaGen = AGEN_SKIP; //already got it in this set since it does all 4 components
}
break;
case CGEN_ONE_MINUS_ENTITY:
RB_CalcColorFromOneMinusEntity( ( unsigned char * ) tess.svars.colors );
break;
case CGEN_LIGHTMAPSTYLE:
for ( i = 0; i < tess.numVertexes; i++ )
{
byteAlias_t *baDest = (byteAlias_t *)&tess.svars.colors[i],
*baSource = (byteAlias_t *)&styleColors[pStage->lightmapStyle];
baDest->i = baSource->i;
}
break;
}
//
// alphaGen
//
switch ( pStage->alphaGen )
{
case AGEN_SKIP:
break;
case AGEN_IDENTITY:
if ( forceRGBGen != CGEN_IDENTITY ) {
if ( ( forceRGBGen == CGEN_VERTEX && tr.identityLight != 1 ) ||
forceRGBGen != CGEN_VERTEX ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = 0xff;
}
}
}
break;
case AGEN_CONST:
if ( forceRGBGen != CGEN_CONST ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = pStage->constantColor[3];
}
}
break;
case AGEN_WAVEFORM:
RB_CalcWaveAlpha( &pStage->alphaWave, ( unsigned char * ) tess.svars.colors );
break;
case AGEN_LIGHTING_SPECULAR:
RB_CalcSpecularAlpha( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_ENTITY:
RB_CalcAlphaFromEntity( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_ONE_MINUS_ENTITY:
RB_CalcAlphaFromOneMinusEntity( ( unsigned char * ) tess.svars.colors );
break;
case AGEN_VERTEX:
if ( forceRGBGen != CGEN_VERTEX ) {
for ( i = 0; i < tess.numVertexes; i++ ) {
tess.svars.colors[i][3] = tess.vertexColors[i][3];
}
}
break;
case AGEN_ONE_MINUS_VERTEX:
for ( i = 0; i < tess.numVertexes; i++ )
{
tess.svars.colors[i][3] = 255 - tess.vertexColors[i][3];
}
break;
case AGEN_PORTAL:
{
unsigned char alpha;
for ( i = 0; i < tess.numVertexes; i++ )
{
float len;
vec3_t v;
VectorSubtract( tess.xyz[i], backEnd.viewParms.ori.origin, v );
len = VectorLength( v );
len /= tess.shader->portalRange;
if ( len < 0 )
{
alpha = 0;
}
else if ( len > 1 )
{
alpha = 0xff;
}
else
{
alpha = len * 0xff;
}
tess.svars.colors[i][3] = alpha;
}
}
break;
case AGEN_BLEND:
if ( forceRGBGen != CGEN_VERTEX )
{
for ( i = 0; i < tess.numVertexes; i++ )
{
colors[i][3] = tess.vertexAlphas[i][pStage->index]; //rwwRMG - added support
}
}
break;
default:
break;
}
avoidGen:
//
// fog adjustment for colors to fade out as fog increases
//
if ( tess.fogNum )
{
switch ( pStage->adjustColorsForFog )
{
case ACFF_MODULATE_RGB:
RB_CalcModulateColorsByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_MODULATE_ALPHA:
RB_CalcModulateAlphasByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_MODULATE_RGBA:
RB_CalcModulateRGBAsByFog( ( unsigned char * ) tess.svars.colors );
break;
case ACFF_NONE:
break;
}
}
}
void RB_RenderFlare( flare_t *f ) {
float size;
vec3_t color;
int iColor[3];
float distance, intensity, factor;
byte fogFactors[3] = {255, 255, 255};
int ind=0;
int alphcal;
backEnd.pc.c_flareRenders++;
flaredsize = backEnd.viewParms.viewportHeight * (f->radius * 0.06);
float flaredsize2 = backEnd.viewParms.viewportHeight;
// We don't want too big values anyways when dividing by distance.
if(f->eyeZ > -1.0f)
distance = 1.0f;
else
distance = -f->eyeZ;
if ( (r_flaresDlightShrink->integer) && (f->type == 1) ) // leilei - dynamic light flares shrinking when close
{
float newd = distance / (48.0f);
if (newd > 1) newd = 1.0f;
flaredsize *= newd;
}
if(!f->radius)
f->radius = 0.0f; // leilei - don't do a radius if there is no radius at all!
// calculate the flare size..
/*
* This is an alternative to intensity scaling. It changes the size of the flare on screen instead
* with growing distance. See in the description at the top why this is not the way to go.
*/
// size will change ~ 1/r.
if (r_flareMethod->integer == 1 || r_flareMethod->integer == 4 ){ // The "not the way to go" method.
// seen in EF
size = flaredsize * (r_flareSize->value / (distance * -2.0f));
}
else if (r_flareMethod->integer == 2){ // Raven method
size = flaredsize * ( r_flareSize->value/640.0f + 8 / -f->eyeZ ); }
else
{
size = flaredsize * ( (r_flareSize->value) /640.0f + 8 / distance );
}
/*
* As flare sizes stay nearly constant with increasing distance we must decrease the intensity
* to achieve a reasonable visual result. The intensity is ~ (size^2 / distance^2) which can be
* got by considering the ratio of
* (flaresurface on screen) : (Surface of sphere defined by flare origin and distance from flare)
* An important requirement is:
* intensity <= 1 for all distances.
*
* The formula used here to compute the intensity is as follows:
* intensity = flareCoeff * size^2 / (distance + size*sqrt(flareCoeff))^2
* As you can see, the intensity will have a max. of 1 when the distance is 0.
* The coefficient flareCoeff will determine the falloff speed with increasing distance.
*/
factor = distance + size * sqrt(flareCoeff);
if (r_flareMethod->integer == 4) // leilei - EF didn't scale intensity on distance. Speed I guess
intensity = 1;
else
intensity = flareCoeff * size * size / (factor * factor);
if (r_flareMethod->integer == 1) // leilei - stupid hack to fix the not the way method
{
if (intensity > 1) intensity = 1;
}
if (pvrhack)
VectorScale(f->color, 1, color );
else
VectorScale(f->color, f->drawIntensity * intensity, color);
// Calculations for fogging
if(tr.world && f->fogNum > 0 && f->fogNum < tr.world->numfogs)
{
tess.numVertexes = 1;
VectorCopy(f->origin, tess.xyz[0]);
tess.fogNum = f->fogNum;
RB_CalcModulateColorsByFog(fogFactors);
// We don't need to render the flare if colors are 0 anyways.
if(!(fogFactors[0] || fogFactors[1] || fogFactors[2]))
return;
}
iColor[0] = color[0] * fogFactors[0];
iColor[1] = color[1] * fogFactors[1];
iColor[2] = color[2] * fogFactors[2];
if (pvrhack)
alphcal = f->drawIntensity * tr.identityLight * 255; // Calculate alphas from intensity instead
else
alphcal = 255; // Don't mess with alpha.
float halfer = 1;
if (f->ftype == 5 || f->ftype == 6 || f->ftype == 7 || f->ftype == 166){
RB_BeginSurface( tr.flareShaderAtlas, f->fogNum );
halfer = 0.5f;
}
else
{
if (r_flareQuality->integer) // leilei - high quality flares get no depth testing
{
int index;
for(index = 0; index <f->theshader->numUnfoggedPasses; index++)
{
f->theshader->stages[index]->adjustColorsForFog = ACFF_NONE;
f->theshader->stages[index]->stateBits |= GLS_DEPTHTEST_DISABLE;
}
}
RB_BeginSurface( f->theshader, f->fogNum );
halfer = 1;
}
// FIXME: use quadstamp?
tess.xyz[tess.numVertexes][0] = f->windowX - size;
tess.xyz[tess.numVertexes][1] = f->windowY - size;
tess.texCoords[tess.numVertexes][0][0] = 0;
tess.texCoords[tess.numVertexes][0][1] = 0;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = alphcal;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX - size;
tess.xyz[tess.numVertexes][1] = f->windowY + size;
tess.texCoords[tess.numVertexes][0][0] = 0;
tess.texCoords[tess.numVertexes][0][1] = 1 * halfer;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = alphcal;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX + size;
tess.xyz[tess.numVertexes][1] = f->windowY + size;
tess.texCoords[tess.numVertexes][0][0] = 1 * halfer;
tess.texCoords[tess.numVertexes][0][1] = 1 * halfer;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = alphcal;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = f->windowX + size;
tess.xyz[tess.numVertexes][1] = f->windowY - size;
tess.texCoords[tess.numVertexes][0][0] = 1 * halfer;
tess.texCoords[tess.numVertexes][0][1] = 0;
tess.vertexColors[tess.numVertexes][0] = iColor[0];
tess.vertexColors[tess.numVertexes][1] = iColor[1];
tess.vertexColors[tess.numVertexes][2] = iColor[2];
tess.vertexColors[tess.numVertexes][3] = alphcal;
tess.numVertexes++;
tess.indexes[tess.numIndexes++] = 0;
tess.indexes[tess.numIndexes++] = 1;
tess.indexes[tess.numIndexes++] = 2;
tess.indexes[tess.numIndexes++] = 0;
tess.indexes[tess.numIndexes++] = 2;
tess.indexes[tess.numIndexes++] = 3;
ind+=4;
// reflections -- tcpparena
if(f->ftype == 2 || f->ftype == 4){
// renders sharp lens flare.
float cx, cy;
float dx, dy;
float size2;
const float poses[]= {-.15f, 0.6f, -.1f, -.6f, -1.8f};
const float sizes[]= {0.14f, 0.2f, 0.1f, 0.2f, 1.0f};
int brightness1[]= {8,25, 40, 26, 10}; // red
int brightness2[]= {15,23, 25, 30, 5}; // green
int brightness3[]= {12,20, 30, 28, 10}; // blue
const float r3_2=0.866025403784439f;
int n;
cx=backEnd.viewParms.viewportX+(backEnd.viewParms.viewportWidth>>1);
cy=backEnd.viewParms.viewportY+(backEnd.viewParms.viewportHeight>>1);
for(n=0;n<5;n++){
dx=(f->windowX-cx)*poses[n]+cx;
dy=(f->windowY-cy)*poses[n]+cy;
size2=sizes[n]*backEnd.viewParms.viewportWidth*.25f;
brightness1[n]=(int)(brightness1[n]*r_lensReflectionBrightness->value);
brightness2[n]=(int)(brightness2[n]*r_lensReflectionBrightness->value);
brightness3[n]=(int)(brightness3[n]*r_lensReflectionBrightness->value);
tess.xyz[tess.numVertexes][0] = dx-size2;
tess.xyz[tess.numVertexes][1] = dy;
tess.texCoords[tess.numVertexes][0][0] = .5f;
tess.texCoords[tess.numVertexes][0][1] = .5f;
tess.vertexColors[tess.numVertexes][0] = (iColor[0]*brightness1[n])>>8;
tess.vertexColors[tess.numVertexes][1] = (iColor[1]*brightness2[n])>>8;
tess.vertexColors[tess.numVertexes][2] = (iColor[2]*brightness3[n])>>8;
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = dx-size2*.5f;
tess.xyz[tess.numVertexes][1] = dy-size2*r3_2;
tess.texCoords[tess.numVertexes][0][0] = .5f;
tess.texCoords[tess.numVertexes][0][1] = .5f;
tess.vertexColors[tess.numVertexes][0] = (iColor[0]*brightness1[n])>>8;
tess.vertexColors[tess.numVertexes][1] = (iColor[1]*brightness2[n])>>8;
tess.vertexColors[tess.numVertexes][2] = (iColor[2]*brightness3[n])>>8;
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = dx+size2*.5f;
tess.xyz[tess.numVertexes][1] = dy-size2*r3_2;
tess.texCoords[tess.numVertexes][0][0] = .5f;
tess.texCoords[tess.numVertexes][0][1] = .5f;
tess.vertexColors[tess.numVertexes][0] = (iColor[0]*brightness1[n])>>8;
tess.vertexColors[tess.numVertexes][1] = (iColor[1]*brightness2[n])>>8;
tess.vertexColors[tess.numVertexes][2] = (iColor[2]*brightness3[n])>>8;
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = dx+size2;
tess.xyz[tess.numVertexes][1] = dy;
tess.texCoords[tess.numVertexes][0][0] = .5f;
tess.texCoords[tess.numVertexes][0][1] = .5f;
tess.vertexColors[tess.numVertexes][0] = (iColor[0]*brightness1[n])>>8;
tess.vertexColors[tess.numVertexes][1] = (iColor[1]*brightness2[n])>>8;
tess.vertexColors[tess.numVertexes][2] = (iColor[2]*brightness3[n])>>8;
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = dx+size2*.5f;
tess.xyz[tess.numVertexes][1] = dy+size2*r3_2;
tess.texCoords[tess.numVertexes][0][0] = .5f;
tess.texCoords[tess.numVertexes][0][1] = .5f;
tess.vertexColors[tess.numVertexes][0] = (iColor[0]*brightness1[n])>>8;
tess.vertexColors[tess.numVertexes][1] = (iColor[1]*brightness2[n])>>8;
tess.vertexColors[tess.numVertexes][2] = (iColor[2]*brightness3[n])>>8;
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.xyz[tess.numVertexes][0] = dx-size2*.5f;
tess.xyz[tess.numVertexes][1] = dy+size2*r3_2;
tess.texCoords[tess.numVertexes][0][0] = .5f;
tess.texCoords[tess.numVertexes][0][1] = .5f;
tess.vertexColors[tess.numVertexes][0] = (iColor[0]*brightness1[n])>>8;
tess.vertexColors[tess.numVertexes][1] = (iColor[1]*brightness2[n])>>8;
tess.vertexColors[tess.numVertexes][2] = (iColor[2]*brightness3[n])>>8;
tess.vertexColors[tess.numVertexes][3] = 255;
tess.numVertexes++;
tess.indexes[tess.numIndexes++] = 2+ind;
tess.indexes[tess.numIndexes++] = 1+ind;
tess.indexes[tess.numIndexes++] = 0+ind;
tess.indexes[tess.numIndexes++] = 3+ind;
tess.indexes[tess.numIndexes++] = 2+ind;
tess.indexes[tess.numIndexes++] = 0+ind;
tess.indexes[tess.numIndexes++] = 4+ind;
tess.indexes[tess.numIndexes++] = 3+ind;
tess.indexes[tess.numIndexes++] = 0+ind;
tess.indexes[tess.numIndexes++] = 5+ind;
tess.indexes[tess.numIndexes++] = 4+ind;
tess.indexes[tess.numIndexes++] = 0+ind;
ind+=6;
}
}
