/
tr_shade.c
1737 lines (1456 loc) · 42.2 KB
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tr_shade.c
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/*
===========================================================================
Wolfenstein: Enemy Territory GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company.
This file is part of the Wolfenstein: Enemy Territory GPL Source Code (Wolf ET Source Code).
Wolf ET Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Wolf ET Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Wolf ET Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Wolf: ET Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Wolf ET Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
// tr_shade.c
#include "tr_local.h"
/*
THIS ENTIRE FILE IS BACK END
This file deals with applying shaders to surface data in the tess struct.
*/
/*
================
R_ArrayElementDiscrete
This is just for OpenGL conformance testing, it should never be the fastest
================
*/
static void APIENTRY R_ArrayElementDiscrete( GLint index ) {
qglColor4ubv( tess.svars.colors[ index ] );
if ( glState.currenttmu ) {
qglMultiTexCoord2fARB( 0, tess.svars.texcoords[ 0 ][ index ][0], tess.svars.texcoords[ 0 ][ index ][1] );
qglMultiTexCoord2fARB( 1, tess.svars.texcoords[ 1 ][ index ][0], tess.svars.texcoords[ 1 ][ index ][1] );
} else {
qglTexCoord2fv( tess.svars.texcoords[ 0 ][ index ] );
}
qglVertex3fv( tess.xyz[ index ].v );
}
/*
===================
R_DrawStripElements
===================
*/
static int c_vertexes; // for seeing how long our average strips are
static int c_begins;
static void R_DrawStripElements( int numIndexes, const glIndex_t *indexes, void ( APIENTRY *element )( GLint ) ) {
int i;
int last[3] = { -1, -1, -1 };
qboolean even;
c_begins++;
if ( numIndexes <= 0 ) {
return;
}
qglBegin( GL_TRIANGLE_STRIP );
// prime the strip
element( indexes[0] );
element( indexes[1] );
element( indexes[2] );
c_vertexes += 3;
last[0] = indexes[0];
last[1] = indexes[1];
last[2] = indexes[2];
even = qfalse;
for ( i = 3; i < numIndexes; i += 3 )
{
// odd numbered triangle in potential strip
if ( !even ) {
// check previous triangle to see if we're continuing a strip
if ( ( indexes[i + 0] == last[2] ) && ( indexes[i + 1] == last[1] ) ) {
element( indexes[i + 2] );
c_vertexes++;
assert( indexes[i + 2] < tess.numVertexes );
even = qtrue;
}
// otherwise we're done with this strip so finish it and start
// a new one
else
{
qglEnd();
qglBegin( GL_TRIANGLE_STRIP );
c_begins++;
element( indexes[i + 0] );
element( indexes[i + 1] );
element( indexes[i + 2] );
c_vertexes += 3;
even = qfalse;
}
} else
{
// check previous triangle to see if we're continuing a strip
if ( ( last[2] == indexes[i + 1] ) && ( last[0] == indexes[i + 0] ) ) {
element( indexes[i + 2] );
c_vertexes++;
even = qfalse;
}
// otherwise we're done with this strip so finish it and start
// a new one
else
{
qglEnd();
qglBegin( GL_TRIANGLE_STRIP );
c_begins++;
element( indexes[i + 0] );
element( indexes[i + 1] );
element( indexes[i + 2] );
c_vertexes += 3;
even = qfalse;
}
}
// cache the last three vertices
last[0] = indexes[i + 0];
last[1] = indexes[i + 1];
last[2] = indexes[i + 2];
}
qglEnd();
}
/*
==================
R_DrawElements
Optionally performs our own glDrawElements that looks for strip conditions
instead of using the single glDrawElements call that may be inefficient
without compiled vertex arrays.
==================
*/
static void R_DrawElements( int numIndexes, const glIndex_t *indexes ) {
int primitives;
primitives = r_primitives->integer;
// default is to use triangles if compiled vertex arrays are present
if ( primitives == 0 ) {
if ( qglLockArraysEXT ) {
primitives = 2;
} else {
primitives = 1;
}
}
if ( primitives == 2 ) {
qglDrawElements( GL_TRIANGLES,
numIndexes,
GL_INDEX_TYPE,
indexes );
return;
}
if ( primitives == 1 ) {
R_DrawStripElements( numIndexes, indexes, qglArrayElement );
return;
}
if ( primitives == 3 ) {
R_DrawStripElements( numIndexes, indexes, R_ArrayElementDiscrete );
return;
}
// anything else will cause no drawing
}
/*
=============================================================
SURFACE SHADERS
=============================================================
*/
shaderCommands_t tess;
static qboolean setArraysOnce;
/*
=================
R_BindAnimatedImage
=================
*/
static void R_BindAnimatedImage( textureBundle_t *bundle ) {
int index;
if ( bundle->isVideoMap ) {
ri.CIN_RunCinematic( bundle->videoMapHandle );
ri.CIN_UploadCinematic( bundle->videoMapHandle );
return;
}
if ( bundle->numImageAnimations <= 1 ) {
if ( bundle->isLightmap && ( backEnd.refdef.rdflags & RDF_SNOOPERVIEW ) ) {
GL_Bind( tr.whiteImage );
} else {
GL_Bind( bundle->image[0] );
}
return;
}
// it is necessary to do this messy calc to make sure animations line up
// exactly with waveforms of the same frequency
index = myftol( tess.shaderTime * bundle->imageAnimationSpeed * FUNCTABLE_SIZE );
index >>= FUNCTABLE_SIZE2;
if ( index < 0 ) {
index = 0; // may happen with shader time offsets
}
index %= bundle->numImageAnimations;
if ( bundle->isLightmap && ( backEnd.refdef.rdflags & RDF_SNOOPERVIEW ) ) {
GL_Bind( tr.whiteImage );
} else {
GL_Bind( bundle->image[ index ] );
}
}
/*
================
DrawTris
Draws triangle outlines for debugging
================
*/
static void DrawTris( shaderCommands_t *input ) {
char *s = r_trisColor->string;
vec4_t trisColor = { 1, 1, 1, 1 };
unsigned int stateBits = 0;
GL_Bind( tr.whiteImage );
if ( *s == '0' && ( *( s + 1 ) == 'x' || *( s + 1 ) == 'X' ) ) {
s += 2;
if ( Q_IsHexColorString( s ) ) {
trisColor[0] = ( (float)( gethex( *( s ) ) * 16 + gethex( *( s + 1 ) ) ) ) / 255.00;
trisColor[1] = ( (float)( gethex( *( s + 2 ) ) * 16 + gethex( *( s + 3 ) ) ) ) / 255.00;
trisColor[2] = ( (float)( gethex( *( s + 4 ) ) * 16 + gethex( *( s + 5 ) ) ) ) / 255.00;
if ( Q_HexColorStringHasAlpha( s ) ) {
trisColor[3] = ( (float)( gethex( *( s + 6 ) ) * 16 + gethex( *( s + 7 ) ) ) ) / 255.00;
}
}
} else {
int i;
char *token;
for ( i = 0 ; i < 4 ; i++ ) {
token = COM_Parse( &s );
if ( token ) {
trisColor[i] = atof( token );
} else {
trisColor[i] = 1.f;
}
}
if ( !trisColor[3] ) {
trisColor[3] = 1.f;
}
}
if ( trisColor[3] < 1.f ) {
stateBits |= ( GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA );
}
qglColor4fv( trisColor );
// ydnar r_showtris 2
if ( r_showtris->integer == 2 ) {
stateBits |= ( GLS_POLYMODE_LINE | GLS_DEPTHMASK_TRUE );
GL_State( stateBits );
qglDepthRange( 0, 0 );
}
#ifdef CELSHADING_HACK
else if ( r_showtris->integer == 3 ) {
stateBits |= ( GLS_POLYMODE_LINE | GLS_DEPTHMASK_TRUE );
GL_State( stateBits );
qglEnable( GL_POLYGON_OFFSET_LINE );
qglPolygonOffset( 4.0, 0.5 );
qglLineWidth( 5.0 );
}
#endif
else
{
stateBits |= ( GLS_POLYMODE_LINE );
GL_State( stateBits );
qglEnable( GL_POLYGON_OFFSET_LINE );
qglPolygonOffset( r_offsetFactor->value, r_offsetUnits->value );
}
qglDisableClientState( GL_COLOR_ARRAY );
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
qglVertexPointer( 3, GL_FLOAT, 16, input->xyz ); // padded for SIMD
if ( qglLockArraysEXT ) {
qglLockArraysEXT( 0, input->numVertexes );
GLimp_LogComment( "glLockArraysEXT\n" );
}
R_DrawElements( input->numIndexes, input->indexes );
if ( qglUnlockArraysEXT ) {
qglUnlockArraysEXT();
GLimp_LogComment( "glUnlockArraysEXT\n" );
}
qglDepthRange( 0, 1 );
qglDisable( GL_POLYGON_OFFSET_LINE );
}
/*
================
DrawNormals
Draws vertex normals for debugging
================
*/
static void DrawNormals( shaderCommands_t *input ) {
int i;
vec3_t temp;
GL_Bind( tr.whiteImage );
qglColor3f( 1,1,1 );
qglDepthRange( 0, 0 ); // never occluded
GL_State( GLS_POLYMODE_LINE | GLS_DEPTHMASK_TRUE );
// ydnar: light direction
if ( r_shownormals->integer == 2 ) {
trRefEntity_t *ent = backEnd.currentEntity;
vec3_t temp2;
if ( ent->e.renderfx & RF_LIGHTING_ORIGIN ) {
VectorSubtract( ent->e.lightingOrigin, backEnd.orientation.origin, temp2 );
} else {
VectorClear( temp2 );
}
temp[ 0 ] = DotProduct( temp2, backEnd.orientation.axis[ 0 ] );
temp[ 1 ] = DotProduct( temp2, backEnd.orientation.axis[ 1 ] );
temp[ 2 ] = DotProduct( temp2, backEnd.orientation.axis[ 2 ] );
qglColor3f( ent->ambientLight[ 0 ] / 255, ent->ambientLight[ 1 ] / 255, ent->ambientLight[ 2 ] / 255 );
qglPointSize( 5 );
qglBegin( GL_POINTS );
qglVertex3fv( temp );
qglEnd();
qglPointSize( 1 );
if ( fabs( VectorLengthSquared( ent->lightDir ) - 1.0f ) > 0.2f ) {
qglColor3f( 1, 0, 0 );
} else {
qglColor3f( ent->directedLight[ 0 ] / 255, ent->directedLight[ 1 ] / 255, ent->directedLight[ 2 ] / 255 );
}
qglLineWidth( 3 );
qglBegin( GL_LINES );
qglVertex3fv( temp );
VectorMA( temp, 32, ent->lightDir, temp );
qglVertex3fv( temp );
qglEnd();
qglLineWidth( 1 );
}
// ydnar: normals drawing
else
{
qglBegin( GL_LINES );
for ( i = 0 ; i < input->numVertexes ; i++ ) {
qglVertex3fv( input->xyz[i].v );
VectorMA( input->xyz[i].v, r_normallength->value, input->normal[i].v, temp );
qglVertex3fv( temp );
}
qglEnd();
}
qglDepthRange( 0, 1 );
}
/*
==============
RB_BeginSurface
We must set some things up before beginning any tesselation,
because a surface may be forced to perform a RB_End due
to overflow.
==============
*/
void RB_BeginSurface( shader_t *shader, int fogNum ) {
shader_t *state = ( shader->remappedShader ) ? shader->remappedShader : shader;
tess.numIndexes = 0;
tess.numVertexes = 0;
tess.shader = state;
tess.fogNum = fogNum;
tess.dlightBits = 0; // will be OR'd in by surface functions
tess.xstages = state->stages;
tess.numPasses = state->numUnfoggedPasses;
tess.currentStageIteratorFunc = state->optimalStageIteratorFunc;
tess.shaderTime = backEnd.refdef.floatTime - tess.shader->timeOffset;
if ( tess.shader->clampTime && tess.shaderTime >= tess.shader->clampTime ) {
tess.shaderTime = tess.shader->clampTime;
}
// done.
}
/*
===================
DrawMultitextured
output = t0 * t1 or t0 + t1
t0 = most upstream according to spec
t1 = most downstream according to spec
===================
*/
static void DrawMultitextured( shaderCommands_t *input, int stage ) {
shaderStage_t *pStage;
pStage = tess.xstages[stage];
// Ridah
if ( tess.shader->noFog && pStage->isFogged ) {
R_FogOn();
} else if ( tess.shader->noFog && !pStage->isFogged ) {
R_FogOff(); // turn it back off
} else { // make sure it's on
R_FogOn();
}
// done.
GL_State( pStage->stateBits );
// this is an ugly hack to work around a GeForce driver
// bug with multitexture and clip planes
if ( backEnd.viewParms.isPortal ) {
qglPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
}
//
// base
//
GL_SelectTexture( 0 );
qglTexCoordPointer( 2, GL_FLOAT, 0, input->svars.texcoords[0] );
R_BindAnimatedImage( &pStage->bundle[0] );
//
// lightmap/secondary pass
//
GL_SelectTexture( 1 );
qglEnable( GL_TEXTURE_2D );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
if ( r_lightmap->integer ) {
GL_TexEnv( GL_REPLACE );
} else {
GL_TexEnv( tess.shader->multitextureEnv );
}
qglTexCoordPointer( 2, GL_FLOAT, 0, input->svars.texcoords[1] );
R_BindAnimatedImage( &pStage->bundle[1] );
R_DrawElements( input->numIndexes, input->indexes );
//
// disable texturing on TEXTURE1, then select TEXTURE0
//
//qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
qglDisable( GL_TEXTURE_2D );
GL_SelectTexture( 0 );
}
/*
DynamicLightSinglePass()
perform all dynamic lighting with a single rendering pass
*/
static void DynamicLightSinglePass( void ) {
int i, l, a, b, c, color, *intColors;
vec3_t origin;
byte *colors;
unsigned hitIndexes[ SHADER_MAX_INDEXES ];
int numIndexes;
float radius, radiusInverseCubed;
float intensity, remainder, modulate;
vec3_t floatColor, dir;
dlight_t *dl;
// early out
if ( backEnd.refdef.num_dlights == 0 ) {
return;
}
// clear colors
Com_Memset( tess.svars.colors, 0, sizeof( tess.svars.colors ) );
// walk light list
for ( l = 0; l < backEnd.refdef.num_dlights; l++ )
{
// early out
if ( !( tess.dlightBits & ( 1 << l ) ) ) {
continue;
}
// setup
dl = &backEnd.refdef.dlights[ l ];
VectorCopy( dl->transformed, origin );
radius = dl->radius;
radiusInverseCubed = dl->radiusInverseCubed;
intensity = dl->intensity;
floatColor[ 0 ] = dl->color[ 0 ] * 255.0f;
floatColor[ 1 ] = dl->color[ 1 ] * 255.0f;
floatColor[ 2 ] = dl->color[ 2 ] * 255.0f;
// directional lights have max intensity and washout remainder intensity
if ( dl->flags & REF_DIRECTED_DLIGHT ) {
remainder = intensity * 0.125;
} else {
remainder = 0.0f;
}
// illuminate vertexes
colors = tess.svars.colors[ 0 ];
for ( i = 0; i < tess.numVertexes; i++, colors += 4 )
{
backEnd.pc.c_dlightVertexes++;
// directional dlight, origin is a directional normal
if ( dl->flags & REF_DIRECTED_DLIGHT ) {
// twosided surfaces use absolute value of the calculated lighting
modulate = intensity * DotProduct( dl->origin, tess.normal[ i ].v );
if ( tess.shader->cullType == CT_TWO_SIDED ) {
modulate = fabs( modulate );
}
modulate += remainder;
}
// ball dlight
else
{
dir[ 0 ] = radius - fabs( origin[ 0 ] - tess.xyz[ i ].v[ 0 ] );
if ( dir[ 0 ] <= 0.0f ) {
continue;
}
dir[ 1 ] = radius - fabs( origin[ 1 ] - tess.xyz[ i ].v[ 1 ] );
if ( dir[ 1 ] <= 0.0f ) {
continue;
}
dir[ 2 ] = radius - fabs( origin[ 2 ] - tess.xyz[ i ].v[ 2 ] );
if ( dir[ 2 ] <= 0.0f ) {
continue;
}
modulate = intensity * dir[ 0 ] * dir[ 1 ] * dir[ 2 ] * radiusInverseCubed;
}
// optimizations
if ( modulate < ( 1.0f / 128.0f ) ) {
continue;
} else if ( modulate > 1.0f ) {
modulate = 1.0f;
}
// add to color
color = colors[ 0 ] + myftol( floatColor[ 0 ] * modulate );
colors[ 0 ] = color > 255 ? 255 : color;
color = colors[ 1 ] + myftol( floatColor[ 1 ] * modulate );
colors[ 1 ] = color > 255 ? 255 : color;
color = colors[ 2 ] + myftol( floatColor[ 2 ] * modulate );
colors[ 2 ] = color > 255 ? 255 : color;
}
}
// build a list of triangles that need light
intColors = (int*) tess.svars.colors;
numIndexes = 0;
for ( i = 0; i < tess.numIndexes; i += 3 )
{
a = tess.indexes[ i ];
b = tess.indexes[ i + 1 ];
c = tess.indexes[ i + 2 ];
if ( !( intColors[ a ] | intColors[ b ] | intColors[ c ] ) ) {
continue;
}
hitIndexes[ numIndexes++ ] = a;
hitIndexes[ numIndexes++ ] = b;
hitIndexes[ numIndexes++ ] = c;
}
if ( numIndexes == 0 ) {
return;
}
// debug code
//% for( i = 0; i < numIndexes; i++ )
//% intColors[ hitIndexes[ i ] ] = 0x000000FF;
qglEnableClientState( GL_COLOR_ARRAY );
qglColorPointer( 4, GL_UNSIGNED_BYTE, 0, tess.svars.colors );
// render the dynamic light pass
R_FogOff();
GL_Bind( tr.whiteImage );
GL_State( GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL );
R_DrawElements( numIndexes, hitIndexes );
backEnd.pc.c_totalIndexes += numIndexes;
backEnd.pc.c_dlightIndexes += numIndexes;
R_FogOn();
}
/*
DynamicLightPass()
perform dynamic lighting with multiple rendering passes
*/
static void DynamicLightPass( void ) {
int i, l, a, b, c, color, *intColors;
vec3_t origin;
byte *colors;
unsigned hitIndexes[ SHADER_MAX_INDEXES ];
int numIndexes;
float radius, radiusInverseCubed;
float intensity, remainder, modulate;
vec3_t floatColor, dir;
dlight_t *dl;
// early out
if ( backEnd.refdef.num_dlights == 0 ) {
return;
}
// walk light list
for ( l = 0; l < backEnd.refdef.num_dlights; l++ )
{
// early out
if ( !( tess.dlightBits & ( 1 << l ) ) ) {
continue;
}
// clear colors
Com_Memset( tess.svars.colors, 0, sizeof( tess.svars.colors ) );
// setup
dl = &backEnd.refdef.dlights[ l ];
VectorCopy( dl->transformed, origin );
radius = dl->radius;
radiusInverseCubed = dl->radiusInverseCubed;
intensity = dl->intensity;
floatColor[ 0 ] = dl->color[ 0 ] * 255.0f;
floatColor[ 1 ] = dl->color[ 1 ] * 255.0f;
floatColor[ 2 ] = dl->color[ 2 ] * 255.0f;
// directional lights have max intensity and washout remainder intensity
if ( dl->flags & REF_DIRECTED_DLIGHT ) {
remainder = intensity * 0.125;
} else {
remainder = 0.0f;
}
// illuminate vertexes
colors = tess.svars.colors[ 0 ];
for ( i = 0; i < tess.numVertexes; i++, colors += 4 )
{
backEnd.pc.c_dlightVertexes++;
// directional dlight, origin is a directional normal
if ( dl->flags & REF_DIRECTED_DLIGHT ) {
// twosided surfaces use absolute value of the calculated lighting
modulate = intensity * DotProduct( dl->origin, tess.normal[ i ].v );
if ( tess.shader->cullType == CT_TWO_SIDED ) {
modulate = fabs( modulate );
}
modulate += remainder;
}
// ball dlight
else
{
dir[ 0 ] = radius - fabs( origin[ 0 ] - tess.xyz[ i ].v[ 0 ] );
if ( dir[ 0 ] <= 0.0f ) {
continue;
}
dir[ 1 ] = radius - fabs( origin[ 1 ] - tess.xyz[ i ].v[ 1 ] );
if ( dir[ 1 ] <= 0.0f ) {
continue;
}
dir[ 2 ] = radius - fabs( origin[ 2 ] - tess.xyz[ i ].v[ 2 ] );
if ( dir[ 2 ] <= 0.0f ) {
continue;
}
modulate = intensity * dir[ 0 ] * dir[ 1 ] * dir[ 2 ] * radiusInverseCubed;
}
// optimizations
if ( modulate < ( 1.0f / 128.0f ) ) {
continue;
} else if ( modulate > 1.0f ) {
modulate = 1.0f;
}
// set color
color = myftol( floatColor[ 0 ] * modulate );
colors[ 0 ] = color > 255 ? 255 : color;
color = myftol( floatColor[ 1 ] * modulate );
colors[ 1 ] = color > 255 ? 255 : color;
color = myftol( floatColor[ 2 ] * modulate );
colors[ 2 ] = color > 255 ? 255 : color;
}
// build a list of triangles that need light
intColors = (int*) tess.svars.colors;
numIndexes = 0;
for ( i = 0; i < tess.numIndexes; i += 3 )
{
a = tess.indexes[ i ];
b = tess.indexes[ i + 1 ];
c = tess.indexes[ i + 2 ];
if ( !( intColors[ a ] | intColors[ b ] | intColors[ c ] ) ) {
continue;
}
hitIndexes[ numIndexes++ ] = a;
hitIndexes[ numIndexes++ ] = b;
hitIndexes[ numIndexes++ ] = c;
}
if ( numIndexes == 0 ) {
continue;
}
// debug code (fixme, there's a bug in this function!)
//% for( i = 0; i < numIndexes; i++ )
//% intColors[ hitIndexes[ i ] ] = 0x000000FF;
qglEnableClientState( GL_COLOR_ARRAY );
qglColorPointer( 4, GL_UNSIGNED_BYTE, 0, tess.svars.colors );
R_FogOff();
GL_Bind( tr.whiteImage );
GL_State( GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL );
R_DrawElements( numIndexes, hitIndexes );
backEnd.pc.c_totalIndexes += numIndexes;
backEnd.pc.c_dlightIndexes += numIndexes;
R_FogOn();
}
}
/*
===================
RB_FogPass
Blends a fog texture on top of everything else
===================
*/
static void RB_FogPass( void ) {
fog_t *fog;
int i;
// no fog pass in snooper
if ( tr.refdef.rdflags & RDF_SNOOPERVIEW || tess.shader->noFog || !r_wolffog->integer ) {
return;
}
// ydnar: no world, no fogging
if ( backEnd.refdef.rdflags & RDF_NOWORLDMODEL ) {
return;
}
qglEnableClientState( GL_COLOR_ARRAY );
qglColorPointer( 4, GL_UNSIGNED_BYTE, 0, tess.svars.colors );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
qglTexCoordPointer( 2, GL_FLOAT, 0, tess.svars.texcoords[0] );
fog = tr.world->fogs + tess.fogNum;
for ( i = 0; i < tess.numVertexes; i++ ) {
*( int * )&tess.svars.colors[i] = fog->shader->fogParms.colorInt;
}
RB_CalcFogTexCoords( ( float * ) tess.svars.texcoords[0] );
GL_Bind( tr.fogImage );
if ( tess.shader->fogPass == FP_EQUAL ) {
GL_State( GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA | GLS_DEPTHFUNC_EQUAL );
} else {
GL_State( GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA );
}
R_DrawElements( tess.numIndexes, tess.indexes );
}
/*
===============
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;
}