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Copy pathsurface.cpp
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3783 lines (3047 loc) · 92.9 KB
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/* -------------------------------------------------------------------------------
Copyright (C) 1999-2007 id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.
This file is part of GtkRadiant.
GtkRadiant 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 2 of the License, or
(at your option) any later version.
GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
----------------------------------------------------------------------------------
This code has been altered significantly from its original form, to support
several games based on the Quake III Arena engine, in the form of "Q3Map2."
------------------------------------------------------------------------------- */
/* marker */
#define SURFACE_C
/* dependencies */
#include "q3map2.h"
/*
AllocDrawSurface()
ydnar: gs mods: changed to force an explicit type when allocating
*/
mapDrawSurface_t *AllocDrawSurface( surfaceType_t type ){
mapDrawSurface_t *ds;
/* ydnar: gs mods: only allocate valid types */
if ( type <= SURFACE_BAD || type >= NUM_SURFACE_TYPES ) {
Error( "AllocDrawSurface: Invalid surface type %d specified", type );
}
/* bounds check */
if ( numMapDrawSurfs >= MAX_MAP_DRAW_SURFS ) {
Error( "MAX_MAP_DRAW_SURFS (%d) exceeded", MAX_MAP_DRAW_SURFS );
}
ds = &mapDrawSurfs[ numMapDrawSurfs ];
numMapDrawSurfs++;
/* ydnar: do initial surface setup */
memset( ds, 0, sizeof( mapDrawSurface_t ) );
ds->type = type;
ds->planeNum = -1;
ds->fogNum = defaultFogNum; /* ydnar 2003-02-12 */
ds->outputNum = -1; /* ydnar 2002-08-13 */
ds->surfaceNum = numMapDrawSurfs - 1; /* ydnar 2003-02-16 */
return ds;
}
/*
FinishSurface()
ydnar: general surface finish pass
*/
void FinishSurface( mapDrawSurface_t *ds ){
mapDrawSurface_t *ds2;
/* dummy check */
if ( ds->type <= SURFACE_BAD || ds->type >= NUM_SURFACE_TYPES || ds == NULL || ds->shaderInfo == NULL ) {
return;
}
/* ydnar: rocking tek-fu celshading */
if ( ds->celShader != NULL ) {
MakeCelSurface( ds, ds->celShader );
}
/* backsides stop here */
if ( ds->backSide ) {
return;
}
/* ydnar: rocking surface cloning (fur baby yeah!) */
if ( ds->shaderInfo->cloneShader != NULL && ds->shaderInfo->cloneShader[ 0 ] != '\0' ) {
CloneSurface( ds, ShaderInfoForShader( ds->shaderInfo->cloneShader ) );
}
/* ydnar: q3map_backShader support */
if ( ds->shaderInfo->backShader != NULL && ds->shaderInfo->backShader[ 0 ] != '\0' ) {
ds2 = CloneSurface( ds, ShaderInfoForShader( ds->shaderInfo->backShader ) );
ds2->backSide = qtrue;
}
}
/*
CloneSurface()
clones a map drawsurface, using the specified shader
*/
mapDrawSurface_t *CloneSurface( mapDrawSurface_t *src, shaderInfo_t *si ){
mapDrawSurface_t *ds;
/* dummy check */
if ( src == NULL || si == NULL ) {
return NULL;
}
/* allocate a new surface */
ds = AllocDrawSurface( src->type );
if ( ds == NULL ) {
return NULL;
}
/* copy it */
memcpy( ds, src, sizeof( *ds ) );
/* destroy side reference */
ds->sideRef = NULL;
/* set shader */
ds->shaderInfo = si;
/* copy verts */
if ( ds->numVerts > 0 ) {
ds->verts = static_cast<bspDrawVert_t*>(safe_malloc(ds->numVerts * sizeof(*ds->verts)));
memcpy( ds->verts, src->verts, ds->numVerts * sizeof( *ds->verts ) );
}
/* copy indexes */
if ( ds->numIndexes <= 0 ) {
return ds;
}
ds->indexes = static_cast<int *>(safe_malloc(ds->numIndexes * sizeof(*ds->indexes)));
memcpy( ds->indexes, src->indexes, ds->numIndexes * sizeof( *ds->indexes ) );
/* return the surface */
return ds;
}
/*
MakeCelSurface() - ydnar
makes a copy of a surface, but specific to cel shading
*/
mapDrawSurface_t *MakeCelSurface( mapDrawSurface_t *src, shaderInfo_t *si ){
mapDrawSurface_t *ds;
/* dummy check */
if ( src == NULL || si == NULL ) {
return NULL;
}
/* don't create cel surfaces for certain types of shaders */
if ( ( src->shaderInfo->compileFlags & C_TRANSLUCENT ) ||
( src->shaderInfo->compileFlags & C_SKY ) ) {
return NULL;
}
/* make a copy */
ds = CloneSurface( src, si );
if ( ds == NULL ) {
return NULL;
}
/* do some fixups for celshading */
ds->planar = qfalse;
ds->planeNum = -1;
ds->celShader = NULL; /* don't cel shade cels :P */
/* return the surface */
return ds;
}
/*
MakeSkyboxSurface() - ydnar
generates a skybox surface, viewable from everywhere there is sky
*/
mapDrawSurface_t *MakeSkyboxSurface( mapDrawSurface_t *src ){
int i;
mapDrawSurface_t *ds;
/* dummy check */
if ( src == NULL ) {
return NULL;
}
/* make a copy */
ds = CloneSurface( src, src->shaderInfo );
if ( ds == NULL ) {
return NULL;
}
/* set parent */
ds->parent = src;
/* scale the surface vertexes */
for ( i = 0; i < ds->numVerts; i++ )
{
m4x4_transform_point( skyboxTransform, ds->verts[ i ].xyz );
/* debug code */
//% bspDrawVerts[ bspDrawSurfaces[ ds->outputNum ].firstVert + i ].color[ 0 ][ 1 ] = 0;
//% bspDrawVerts[ bspDrawSurfaces[ ds->outputNum ].firstVert + i ].color[ 0 ][ 2 ] = 0;
}
/* so backface culling creep doesn't bork the surface */
VectorClear( ds->lightmapVecs[ 2 ] );
/* return the surface */
return ds;
}
/*
IsTriangleDegenerate
returns qtrue if all three points are colinear, backwards, or the triangle is just plain bogus
*/
#define TINY_AREA 1.0f
qboolean IsTriangleDegenerate( bspDrawVert_t *points, int a, int b, int c ){
vec3_t v1, v2, v3;
float d;
/* calcuate the area of the triangle */
VectorSubtract( points[ b ].xyz, points[ a ].xyz, v1 );
VectorSubtract( points[ c ].xyz, points[ a ].xyz, v2 );
CrossProduct( v1, v2, v3 );
d = VectorLength( v3 );
/* assume all very small or backwards triangles will cause problems */
if ( d < TINY_AREA ) {
return qtrue;
}
/* must be a good triangle */
return qfalse;
}
/*
ClearSurface() - ydnar
clears a surface and frees any allocated memory
*/
void ClearSurface( mapDrawSurface_t *ds ){
ds->type = SURFACE_BAD;
ds->planar = qfalse;
ds->planeNum = -1;
ds->numVerts = 0;
if ( ds->verts != NULL ) {
free( ds->verts );
}
ds->verts = NULL;
ds->numIndexes = 0;
if ( ds->indexes != NULL ) {
free( ds->indexes );
}
ds->indexes = NULL;
numClearedSurfaces++;
}
/*
TidyEntitySurfaces() - ydnar
deletes all empty or bad surfaces from the surface list
*/
void TidyEntitySurfaces( entity_t *e ){
int i, j, deleted;
mapDrawSurface_t *out, *in = NULL;
/* note it */
Sys_FPrintf( SYS_VRB, "--- TidyEntitySurfaces ---\n" );
/* walk the surface list */
deleted = 0;
for ( i = e->firstDrawSurf, j = e->firstDrawSurf; j < numMapDrawSurfs; i++, j++ )
{
/* get out surface */
out = &mapDrawSurfs[ i ];
/* walk the surface list again until a proper surface is found */
for ( ; j < numMapDrawSurfs; j++ )
{
/* get in surface */
in = &mapDrawSurfs[ j ];
/* this surface ok? */
if ( in->type == SURFACE_FLARE || in->type == SURFACE_SHADER ||
( in->type != SURFACE_BAD && in->numVerts > 0 ) ) {
break;
}
/* nuke it */
ClearSurface( in );
deleted++;
}
/* copy if necessary */
if ( i != j ) {
memcpy( out, in, sizeof( mapDrawSurface_t ) );
}
}
/* set the new number of drawsurfs */
numMapDrawSurfs = i;
/* emit some stats */
Sys_FPrintf( SYS_VRB, "%9d empty or malformed surfaces deleted\n", deleted );
}
/*
CalcSurfaceTextureRange() - ydnar
calculates the clamped texture range for a given surface, returns qtrue if it's within [-texRange,texRange]
*/
qboolean CalcSurfaceTextureRange( mapDrawSurface_t *ds ){
int i, j, v, size[ 2 ];
float mins[ 2 ], maxs[ 2 ];
/* try to early out */
if ( ds->numVerts <= 0 ) {
return qtrue;
}
/* walk the verts and determine min/max st values */
mins[ 0 ] = 999999;
mins[ 1 ] = 999999;
maxs[ 0 ] = -999999;
maxs[ 1 ] = -999999;
for ( i = 0; i < ds->numVerts; i++ )
{
for ( j = 0; j < 2; j++ )
{
if ( ds->verts[ i ].st[ j ] < mins[ j ] ) {
mins[ j ] = ds->verts[ i ].st[ j ];
}
if ( ds->verts[ i ].st[ j ] > maxs[ j ] ) {
maxs[ j ] = ds->verts[ i ].st[ j ];
}
}
}
/* clamp to integer range and calculate surface bias values */
for ( j = 0; j < 2; j++ )
ds->bias[ j ] = -floor( 0.5f * ( mins[ j ] + maxs[ j ] ) );
/* find biased texture coordinate mins/maxs */
size[ 0 ] = ds->shaderInfo->shaderWidth;
size[ 1 ] = ds->shaderInfo->shaderHeight;
ds->texMins[ 0 ] = 999999;
ds->texMins[ 1 ] = 999999;
ds->texMaxs[ 0 ] = -999999;
ds->texMaxs[ 1 ] = -999999;
for ( i = 0; i < ds->numVerts; i++ )
{
for ( j = 0; j < 2; j++ )
{
v = ( (float) ds->verts[ i ].st[ j ] + ds->bias[ j ] ) * size[ j ];
if ( v < ds->texMins[ j ] ) {
ds->texMins[ j ] = v;
}
if ( v > ds->texMaxs[ j ] ) {
ds->texMaxs[ j ] = v;
}
}
}
/* calc ranges */
for ( j = 0; j < 2; j++ )
ds->texRange[ j ] = ( ds->texMaxs[ j ] - ds->texMins[ j ] );
/* if range is zero, then assume unlimited precision */
if ( texRange == 0 ) {
return qtrue;
}
/* within range? */
for ( j = 0; j < 2; j++ )
{
if ( ds->texMins[ j ] < -texRange || ds->texMaxs[ j ] > texRange ) {
return qfalse;
}
}
/* within range */
return qtrue;
}
/*
CalcLightmapAxis() - ydnar
gives closed lightmap axis for a plane normal
*/
qboolean CalcLightmapAxis( vec3_t normal, vec3_t axis ){
vec3_t absolute;
/* test */
if ( normal[ 0 ] == 0.0f && normal[ 1 ] == 0.0f && normal[ 2 ] == 0.0f ) {
VectorClear( axis );
return qfalse;
}
/* get absolute normal */
absolute[ 0 ] = fabs( normal[ 0 ] );
absolute[ 1 ] = fabs( normal[ 1 ] );
absolute[ 2 ] = fabs( normal[ 2 ] );
/* test and set */
if ( absolute[ 2 ] > absolute[ 0 ] - 0.0001f && absolute[ 2 ] > absolute[ 1 ] - 0.0001f ) {
if ( normal[ 2 ] > 0.0f ) {
VectorSet( axis, 0.0f, 0.0f, 1.0f );
}
else{
VectorSet( axis, 0.0f, 0.0f, -1.0f );
}
}
else if ( absolute[ 0 ] > absolute[ 1 ] - 0.0001f && absolute[ 0 ] > absolute[ 2 ] - 0.0001f ) {
if ( normal[ 0 ] > 0.0f ) {
VectorSet( axis, 1.0f, 0.0f, 0.0f );
}
else{
VectorSet( axis, -1.0f, 0.0f, 0.0f );
}
}
else
{
if ( normal[ 1 ] > 0.0f ) {
VectorSet( axis, 0.0f, 1.0f, 0.0f );
}
else{
VectorSet( axis, 0.0f, -1.0f, 0.0f );
}
}
/* return ok */
return qtrue;
}
/*
ClassifySurfaces() - ydnar
fills out a bunch of info in the surfaces, including planar status, lightmap projection, and bounding box
*/
#define PLANAR_EPSILON 0.5f //% 0.126f 0.25f
void ClassifySurfaces( int numSurfs, mapDrawSurface_t *ds ){
int i, bestAxis;
float dist;
vec4_t plane;
shaderInfo_t *si;
static vec3_t axii[ 6 ] =
{
{ 0, 0, -1 },
{ 0, 0, 1 },
{ -1, 0, 0 },
{ 1, 0, 0 },
{ 0, -1, 0 },
{ 0, 1, 0 }
};
/* walk the list of surfaces */
for ( ; numSurfs > 0; numSurfs--, ds++ )
{
/* ignore bogus (or flare) surfaces */
if ( ds->type == SURFACE_BAD || ds->numVerts <= 0 ) {
continue;
}
/* get shader */
si = ds->shaderInfo;
/* -----------------------------------------------------------------
force meta if vertex count is too high or shader requires it
----------------------------------------------------------------- */
if ( ds->type != SURFACE_PATCH && ds->type != SURFACE_FACE ) {
if ( ds->numVerts > SHADER_MAX_VERTEXES ) {
ds->type = SURFACE_FORCED_META;
}
}
/* -----------------------------------------------------------------
plane and bounding box classification
----------------------------------------------------------------- */
/* set surface bounding box */
ClearBounds( ds->mins, ds->maxs );
for ( i = 0; i < ds->numVerts; i++ )
AddPointToBounds( ds->verts[ i ].xyz, ds->mins, ds->maxs );
/* try to get an existing plane */
if ( ds->planeNum >= 0 ) {
VectorCopy( mapplanes[ ds->planeNum ].normal, plane );
plane[ 3 ] = mapplanes[ ds->planeNum ].dist;
}
/* construct one from the first vert with a valid normal */
else
{
VectorClear( plane );
plane[ 3 ] = 0.0f;
for ( i = 0; i < ds->numVerts; i++ )
{
if ( ds->verts[ i ].normal[ 0 ] != 0.0f && ds->verts[ i ].normal[ 1 ] != 0.0f && ds->verts[ i ].normal[ 2 ] != 0.0f ) {
VectorCopy( ds->verts[ i ].normal, plane );
plane[ 3 ] = DotProduct( ds->verts[ i ].xyz, plane );
break;
}
}
}
/* test for bogus plane */
if ( VectorLength( plane ) <= 0.0f ) {
ds->planar = qfalse;
ds->planeNum = -1;
}
else
{
/* determine if surface is planar */
ds->planar = qtrue;
/* test each vert */
for ( i = 0; i < ds->numVerts; i++ )
{
/* point-plane test */
dist = DotProduct( ds->verts[ i ].xyz, plane ) - plane[ 3 ];
if ( fabs( dist ) > PLANAR_EPSILON ) {
//% if( ds->planeNum >= 0 )
//% {
//% Sys_FPrintf( SYS_WRN, "WARNING: Planar surface marked unplanar (%f > %f)\n", fabs( dist ), PLANAR_EPSILON );
//% ds->verts[ i ].color[ 0 ][ 0 ] = ds->verts[ i ].color[ 0 ][ 2 ] = 0;
//% }
ds->planar = qfalse;
break;
}
}
}
/* find map plane if necessary */
if ( ds->planar ) {
if ( ds->planeNum < 0 ) {
ds->planeNum = FindFloatPlane( plane, plane[ 3 ], 1, &ds->verts[ 0 ].xyz );
}
VectorCopy( plane, ds->lightmapVecs[ 2 ] );
}
else
{
ds->planeNum = -1;
VectorClear( ds->lightmapVecs[ 2 ] );
//% if( ds->type == SURF_META || ds->type == SURF_FACE )
//% Sys_FPrintf( SYS_WRN, "WARNING: Non-planar face (%d): %s\n", ds->planeNum, ds->shaderInfo->shader );
}
/* -----------------------------------------------------------------
lightmap bounds and axis projection
----------------------------------------------------------------- */
/* vertex lit surfaces don't need this information */
if ( si->compileFlags & C_VERTEXLIT || ds->type == SURFACE_TRIANGLES ) {
VectorClear( ds->lightmapAxis );
//% VectorClear( ds->lightmapVecs[ 2 ] );
ds->sampleSize = 0;
continue;
}
/* the shader can specify an explicit lightmap axis */
if ( si->lightmapAxis[ 0 ] || si->lightmapAxis[ 1 ] || si->lightmapAxis[ 2 ] ) {
VectorCopy( si->lightmapAxis, ds->lightmapAxis );
}
else if ( ds->type == SURFACE_FORCED_META ) {
VectorClear( ds->lightmapAxis );
}
else if ( ds->planar ) {
CalcLightmapAxis( plane, ds->lightmapAxis );
}
else
{
/* find best lightmap axis */
for ( bestAxis = 0; bestAxis < 6; bestAxis++ )
{
for ( i = 0; i < ds->numVerts && bestAxis < 6; i++ )
{
//% Sys_Printf( "Comparing %1.3f %1.3f %1.3f to %1.3f %1.3f %1.3f\n",
//% ds->verts[ i ].normal[ 0 ], ds->verts[ i ].normal[ 1 ], ds->verts[ i ].normal[ 2 ],
//% axii[ bestAxis ][ 0 ], axii[ bestAxis ][ 1 ], axii[ bestAxis ][ 2 ] );
if ( DotProduct( ds->verts[ i ].normal, axii[ bestAxis ] ) < 0.25f ) { /* fixme: adjust this tolerance to taste */
break;
}
}
if ( i == ds->numVerts ) {
break;
}
}
/* set axis if possible */
if ( bestAxis < 6 ) {
//% if( ds->type == SURFACE_PATCH )
//% Sys_Printf( "Mapped axis %d onto patch\n", bestAxis );
VectorCopy( axii[ bestAxis ], ds->lightmapAxis );
}
/* debug code */
//% if( ds->type == SURFACE_PATCH )
//% Sys_Printf( "Failed to map axis %d onto patch\n", bestAxis );
}
/* calculate lightmap sample size */
if ( ds->shaderInfo->lightmapSampleSize > 0 ) { /* shader value overrides every other */
ds->sampleSize = ds->shaderInfo->lightmapSampleSize;
}
else if ( ds->sampleSize <= 0 ) { /* may contain the entity asigned value */
ds->sampleSize = sampleSize; /* otherwise use global default */
}
if ( ds->lightmapScale > 0.0f ) { /* apply surface lightmap scaling factor */
ds->sampleSize = ds->lightmapScale * (float)ds->sampleSize;
ds->lightmapScale = 0; /* applied */
}
if ( ds->sampleSize < minSampleSize ) {
ds->sampleSize = minSampleSize;
}
if ( ds->sampleSize < 1 ) {
ds->sampleSize = 1;
}
if ( ds->sampleSize > 16384 ) { /* powers of 2 are preferred */
ds->sampleSize = 16384;
}
}
}
/*
ClassifyEntitySurfaces() - ydnar
classifies all surfaces in an entity
*/
void ClassifyEntitySurfaces( entity_t *e ){
int i;
/* note it */
Sys_FPrintf( SYS_VRB, "--- ClassifyEntitySurfaces ---\n" );
/* walk the surface list */
for ( i = e->firstDrawSurf; i < numMapDrawSurfs; i++ )
{
FinishSurface( &mapDrawSurfs[ i ] );
ClassifySurfaces( 1, &mapDrawSurfs[ i ] );
}
/* tidy things up */
TidyEntitySurfaces( e );
}
/*
GetShaderIndexForPoint() - ydnar
for shader-indexed surfaces (terrain), find a matching index from the indexmap
*/
byte GetShaderIndexForPoint( indexMap_t *im, vec3_t eMins, vec3_t eMaxs, vec3_t point ){
int i, x, y;
float s, t;
vec3_t mins, maxs, size;
/* early out if no indexmap */
if ( im == NULL ) {
return 0;
}
/* this code is really broken */
#if 0
/* legacy precision fudges for terrain */
for ( i = 0; i < 3; i++ )
{
mins[ i ] = floor( eMins[ i ] + 0.1 );
maxs[ i ] = floor( eMaxs[ i ] + 0.1 );
size[ i ] = maxs[ i ] - mins[ i ];
}
/* find st (fixme: support more than just z-axis projection) */
s = floor( point[ 0 ] + 0.1f - mins[ 0 ] ) / size[ 0 ];
t = floor( maxs[ 1 ] - point[ 1 ] + 0.1f ) / size[ 1 ];
if ( s < 0.0f ) {
s = 0.0f;
}
else if ( s > 1.0f ) {
s = 1.0f;
}
if ( t < 0.0f ) {
t = 0.0f;
}
else if ( t > 1.0f ) {
t = 1.0f;
}
/* make xy */
x = ( im->w - 1 ) * s;
y = ( im->h - 1 ) * t;
#else
/* get size */
for ( i = 0; i < 3; i++ )
{
mins[ i ] = eMins[ i ];
maxs[ i ] = eMaxs[ i ];
size[ i ] = maxs[ i ] - mins[ i ];
}
/* calc st */
s = ( point[ 0 ] - mins[ 0 ] ) / size[ 0 ];
t = ( maxs[ 1 ] - point[ 1 ] ) / size[ 1 ];
/* calc xy */
x = s * im->w;
y = t * im->h;
if ( x < 0 ) {
x = 0;
}
else if ( x > ( im->w - 1 ) ) {
x = ( im->w - 1 );
}
if ( y < 0 ) {
y = 0;
}
else if ( y > ( im->h - 1 ) ) {
y = ( im->h - 1 );
}
#endif
/* return index */
return im->pixels[ y * im->w + x ];
}
/*
GetIndexedShader() - ydnar
for a given set of indexes and an indexmap, get a shader and set the vertex alpha in-place
this combines a couple different functions from terrain.c
*/
shaderInfo_t *GetIndexedShader( shaderInfo_t *parent, indexMap_t *im, int numPoints, byte *shaderIndexes ){
int i;
byte minShaderIndex, maxShaderIndex;
char shader[ MAX_QPATH ];
shaderInfo_t *si;
/* early out if bad data */
if ( im == NULL || numPoints <= 0 || shaderIndexes == NULL ) {
return ShaderInfoForShader( "default" );
}
/* determine min/max index */
minShaderIndex = 255;
maxShaderIndex = 0;
for ( i = 0; i < numPoints; i++ )
{
if ( shaderIndexes[ i ] < minShaderIndex ) {
minShaderIndex = shaderIndexes[ i ];
}
if ( shaderIndexes[ i ] > maxShaderIndex ) {
maxShaderIndex = shaderIndexes[ i ];
}
}
/* set alpha inline */
for ( i = 0; i < numPoints; i++ )
{
/* straight rip from terrain.c */
if ( shaderIndexes[ i ] < maxShaderIndex ) {
shaderIndexes[ i ] = 0;
}
else{
shaderIndexes[ i ] = 255;
}
}
/* make a shader name */
if ( minShaderIndex == maxShaderIndex ) {
sprintf( shader, "textures/%s_%d", im->shader, maxShaderIndex );
}
else{
sprintf( shader, "textures/%s_%dto%d", im->shader, minShaderIndex, maxShaderIndex );
}
/* get the shader */
si = ShaderInfoForShader( shader );
/* inherit a few things from parent shader */
if ( parent->globalTexture ) {
si->globalTexture = qtrue;
}
if ( parent->forceMeta ) {
si->forceMeta = qtrue;
}
if ( parent->nonplanar ) {
si->nonplanar = qtrue;
}
if ( si->shadeAngleDegrees == 0.0 ) {
si->shadeAngleDegrees = parent->shadeAngleDegrees;
}
if ( parent->tcGen && si->tcGen == qfalse ) {
/* set xy texture projection */
si->tcGen = qtrue;
VectorCopy( parent->vecs[ 0 ], si->vecs[ 0 ] );
VectorCopy( parent->vecs[ 1 ], si->vecs[ 1 ] );
}
if ( VectorLength( parent->lightmapAxis ) > 0.0f && VectorLength( si->lightmapAxis ) <= 0.0f ) {
/* set lightmap projection axis */
VectorCopy( parent->lightmapAxis, si->lightmapAxis );
}
/* return the shader */
return si;
}
/*
DrawSurfaceForSide()
creates a SURF_FACE drawsurface from a given brush side and winding
*/
#define SNAP_FLOAT_TO_INT 8
#define SNAP_INT_TO_FLOAT ( 1.0 / SNAP_FLOAT_TO_INT )
mapDrawSurface_t *DrawSurfaceForSide( entity_t *e, brush_t *b, side_t *s, winding_t *w ){
int i, j, k;
mapDrawSurface_t *ds;
shaderInfo_t *si, *parent;
bspDrawVert_t *dv;
vec3_t texX, texY;
vec_t x, y;
vec3_t vTranslated;
qboolean indexed;
byte shaderIndexes[ 256 ];
float offsets[ 256 ];
char tempShader[ MAX_QPATH ];
/* ydnar: don't make a drawsurf for culled sides */
if ( s->culled ) {
return NULL;
}
/* range check */
if ( w->numpoints > MAX_POINTS_ON_WINDING ) {
Error( "DrawSurfaceForSide: w->numpoints = %d (> %d)", w->numpoints, MAX_POINTS_ON_WINDING );
}
/* get shader */
si = s->shaderInfo;
/* ydnar: gs mods: check for indexed shader */
if ( si->indexed && b->im != NULL ) {
/* indexed */
indexed = qtrue;
/* get shader indexes for each point */
for ( i = 0; i < w->numpoints; i++ )
{
shaderIndexes[ i ] = GetShaderIndexForPoint( b->im, b->eMins, b->eMaxs, w->p[ i ] );
offsets[ i ] = b->im->offsets[ shaderIndexes[ i ] ];
//% Sys_Printf( "%f ", offsets[ i ] );
}
/* get matching shader and set alpha */
parent = si;
si = GetIndexedShader( parent, b->im, w->numpoints, shaderIndexes );
}
else{
indexed = qfalse;
}
/* ydnar: sky hack/fix for GL_CLAMP borders on ati cards */
if ( skyFixHack && si->skyParmsImageBase[ 0 ] != '\0' ) {
//% Sys_FPrintf( SYS_VRB, "Enabling sky hack for shader %s using env %s\n", si->shader, si->skyParmsImageBase );
sprintf( tempShader, "%s_lf", si->skyParmsImageBase );
DrawSurfaceForShader( tempShader );
sprintf( tempShader, "%s_rt", si->skyParmsImageBase );
DrawSurfaceForShader( tempShader );
sprintf( tempShader, "%s_ft", si->skyParmsImageBase );
DrawSurfaceForShader( tempShader );
sprintf( tempShader, "%s_bk", si->skyParmsImageBase );
DrawSurfaceForShader( tempShader );
sprintf( tempShader, "%s_up", si->skyParmsImageBase );
DrawSurfaceForShader( tempShader );
sprintf( tempShader, "%s_dn", si->skyParmsImageBase );
DrawSurfaceForShader( tempShader );
}
/* ydnar: gs mods */
ds = AllocDrawSurface( SURFACE_FACE );
ds->entityNum = b->entityNum;
ds->castShadows = b->castShadows;
ds->recvShadows = b->recvShadows;
ds->planar = qtrue;
ds->planeNum = s->planenum;
VectorCopy( mapplanes[ s->planenum ].normal, ds->lightmapVecs[ 2 ] );
ds->shaderInfo = si;
ds->mapBrush = b;
ds->sideRef = AllocSideRef( s, NULL );
ds->fogNum = -1;
ds->sampleSize = b->lightmapSampleSize;
ds->lightmapScale = b->lightmapScale;
ds->numVerts = w->numpoints;
ds->verts = static_cast<bspDrawVert_t*>(safe_malloc(ds->numVerts * sizeof(*ds->verts)));
memset( ds->verts, 0, ds->numVerts * sizeof( *ds->verts ) );
/* compute s/t coordinates from brush primitive texture matrix (compute axis base) */
ComputeAxisBase( mapplanes[ s->planenum ].normal, texX, texY );
/* create the vertexes */
for ( j = 0; j < w->numpoints; j++ )
{
/* get the drawvert */
dv = ds->verts + j;
/* copy xyz and do potential z offset */
VectorCopy( w->p[ j ], dv->xyz );
if ( indexed ) {
dv->xyz[ 2 ] += offsets[ j ];
}
/* round the xyz to a given precision and translate by origin */
for ( i = 0 ; i < 3 ; i++ )
dv->xyz[ i ] = SNAP_INT_TO_FLOAT * floor( dv->xyz[ i ] * SNAP_FLOAT_TO_INT + 0.5f );
VectorAdd( dv->xyz, e->origin, vTranslated );
/* ydnar: tek-fu celshading support for flat shaded shit */
if ( flat ) {
dv->st[ 0 ] = si->stFlat[ 0 ];
dv->st[ 1 ] = si->stFlat[ 1 ];
}
/* ydnar: gs mods: added support for explicit shader texcoord generation */
else if ( si->tcGen ) {
dv->st[ 0 ] = DotProduct( si->vecs[ 0 ], vTranslated );
dv->st[ 1 ] = DotProduct( si->vecs[ 1 ], vTranslated );
}
/* old quake-style texturing */
else if ( g_bBrushPrimit == BPRIMIT_OLDBRUSHES ) {
/* nearest-axial projection */
dv->st[ 0 ] = s->vecs[ 0 ][ 3 ] + DotProduct( s->vecs[ 0 ], vTranslated );
dv->st[ 1 ] = s->vecs[ 1 ][ 3 ] + DotProduct( s->vecs[ 1 ], vTranslated );
dv->st[ 0 ] /= si->shaderWidth;