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lightmaps_ydnar.c
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/* -------------------------------------------------------------------------------
Copyright (C) 1999-2006 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 LIGHTMAPS_YDNAR_C
/* dependencies */
//#include "q3map2.h"
#include "kmap2.h" //add hypov8
//#define USE_HDR_LIGHTMAPS
/* -------------------------------------------------------------------------------
this file contains code that doe lightmap allocation and projection that
runs in the -light phase.
this is handled here rather than in the bsp phase for a few reasons--
surfaces are no longer necessarily convex polygons, patches may or may not be
planar or have lightmaps projected directly onto control points.
also, this allows lightmaps to be calculated before being allocated and stored
in the bsp. lightmaps that have little high-frequency information are candidates
for having their resolutions scaled down.
------------------------------------------------------------------------------- */
/*
WriteTGA24()
based on WriteTGA() from imagelib.c
*/
void WriteTGA24(char *filename, byte * data, int width, int height, qboolean flip)
{
int i, c;
byte *buffer, *in;
FILE *file;
/* allocate a buffer and set it up */
buffer = safe_malloc(width * height * 3 + 18);
memset(buffer, 0, 18);
buffer[2] = 2;
buffer[12] = width & 255;
buffer[13] = width >> 8;
buffer[14] = height & 255;
buffer[15] = height >> 8;
buffer[16] = 24;
/* swap rgb to bgr */
c = (width * height * 3) + 18;
for(i = 18; i < c; i += 3)
{
buffer[i] = data[i - 18 + 2]; /* blue */
buffer[i + 1] = data[i - 18 + 1]; /* green */
buffer[i + 2] = data[i - 18 + 0]; /* red */
}
/* write it and free the buffer */
file = fopen(filename, "wb");
if(file == NULL)
Error("Unable to open %s for writing", filename);
/* flip vertically? */
if(flip)
{
fwrite(buffer, 1, 18, file);
for(in = buffer + ((height - 1) * width * 3) + 18; in >= buffer; in -= (width * 3))
fwrite(in, 1, (width * 3), file);
}
else
fwrite(buffer, 1, c, file);
/* close the file */
fclose(file);
free(buffer);
}
// ================================================================
/*
WriteRGBE()
*/
void WriteRGBE(char *filename, float * data, int width, int height)
{
int i, c;
FILE *file;
// unsigned char rgbe[4];
float rgb[3];
file = fopen(filename, "wb");
if(file == NULL)
Error("Unable to open %s for writing", filename);
// write header
if(fprintf(file,"#?RGBE\n") < 0)
Error("RGBE write error: %s", filename);
if(fprintf(file,"# Generated by kmap2 \n") < 0)
Error("RGBE write error: %s", filename);
if(fprintf(file, "FORMAT=32-bit_rle_rgbe\n\n") < 0)
Error("RGBE write error: %s", filename);
if(fprintf(file, "-Y %d +X %d\n", height, width) < 0)
Error("RGBE write error: %s", filename);
c = (width * height * 3);
for(i = 0; i < c; i += 3)
{
#if 0
// FIXME XMap2's output is 255 times too high
rgb[0] = data[i + 0] / 255.0f;
rgb[1] = data[i + 1] / 255.0f;
rgb[2] = data[i + 2] / 255.0f;
ColorToRGBE(rgb, rgbe);
if(fwrite(rgbe, sizeof(rgbe), 1, file) < 1)
Error("RGBE write error: %s", filename);
#else
rgb[0] = data[i + 0];
rgb[1] = data[i + 1];
rgb[2] = data[i + 2];
if(fwrite(rgb, sizeof(rgb), 1, file) < 1)
Error("RGBE write error: %s", filename);
#endif
}
// close the file
fclose(file);
}
/*
ExportLightmaps()
exports the lightmaps as a list of numbered tga images
*/
void ExportLightmaps(void)
{
int i;
char dirname[1024], filename[1024];
byte *lightmap;
/* note it */
Sys_FPrintf(SYS_VRB, "--- ExportLightmaps ---\n");
/* do some path mangling */
strcpy(dirname, source);
StripExtension(dirname);
/* sanity check */
if(bspLightBytes == NULL)
{
Sys_Printf("WARNING: No BSP lightmap data\n");
return;
}
/* make a directory for the lightmaps */
Q_mkdir(dirname);
/* iterate through the lightmaps */
for(i = 0, lightmap = bspLightBytes; lightmap < (bspLightBytes + numBSPLightBytes);
i++, lightmap += (game->lightmapSize * game->lightmapSize * 3))
{
/* write a tga image out */
sprintf(filename, "%s/lightmap_%04d.tga", dirname, i);
Sys_Printf("Writing %s\n", filename);
WriteTGA24(filename, lightmap, game->lightmapSize, game->lightmapSize, qfalse);
}
}
/*
ExportLightmapsMain()
exports the lightmaps as a list of numbered tga images
*/
int ExportLightmapsMain(int argc, char **argv)
{
/* arg checking */
if(argc < 1)
{
Sys_Printf("Usage: kmap -export [-v] <mapname>\n");
return 0;
}
/* do some path mangling */
strcpy(source, ExpandArg(argv[argc - 1]));
StripExtension(source);
DefaultExtension(source, ".bsp");
/* load the bsp */
Sys_Printf("Loading %s\n", source);
LoadBSPFile(source);
/* export the lightmaps */
ExportLightmaps();
/* return to sender */
return 0;
}
/*
ImportLightmapsMain()
imports the lightmaps from a list of numbered tga images
*/
int ImportLightmapsMain(int argc, char **argv)
{
int i, x, y, len, width, height;
char dirname[1024], filename[1024];
byte *lightmap, *buffer, *pixels, *in, *out;
/* arg checking */
if(argc < 1)
{
Sys_Printf("Usage: kmap -import [-v] <mapname>\n");
return 0;
}
/* do some path mangling */
strcpy(source, ExpandArg(argv[argc - 1]));
StripExtension(source);
DefaultExtension(source, ".bsp");
/* load the bsp */
Sys_Printf("Loading %s\n", source);
LoadBSPFile(source);
/* note it */
Sys_FPrintf(SYS_VRB, "--- ImportLightmaps ---\n");
/* do some path mangling */
strcpy(dirname, source);
StripExtension(dirname);
/* sanity check */
if(bspLightBytes == NULL)
Error("No lightmap data");
/* make a directory for the lightmaps */
Q_mkdir(dirname);
/* iterate through the lightmaps */
for(i = 0, lightmap = bspLightBytes; lightmap < (bspLightBytes + numBSPLightBytes);
i++, lightmap += (game->lightmapSize * game->lightmapSize * 3))
{
/* read a tga image */
sprintf(filename, "%s/lightmap_%04d.tga", dirname, i);
Sys_Printf("Loading %s\n", filename);
buffer = NULL;
len = vfsLoadFile(filename, (void *)&buffer, -1);
if(len < 0)
{
Sys_Printf("WARNING: Unable to load image %s\n", filename);
continue;
}
/* parse file into an image */
pixels = NULL;
LoadTGABuffer(buffer, &pixels, &width, &height);
free(buffer);
/* sanity check it */
if(pixels == NULL)
{
Sys_Printf("WARNING: Unable to load image %s\n", filename);
continue;
}
if(width != game->lightmapSize || height != game->lightmapSize)
Sys_Printf("WARNING: Image %s is not the right size (%d, %d) != (%d, %d)\n",
filename, width, height, game->lightmapSize, game->lightmapSize);
/* copy the pixels */
in = pixels;
for(y = 1; y <= game->lightmapSize; y++)
{
out = lightmap + ((game->lightmapSize - y) * game->lightmapSize * 3);
for(x = 0; x < game->lightmapSize; x++, in += 4, out += 3)
VectorCopy(in, out);
}
/* free the image */
free(pixels);
}
/* write the bsp */
Sys_Printf("writing %s\n", source);
WriteBSPFile(source);
/* return to sender */
return 0;
}
/* -------------------------------------------------------------------------------
this section deals with projecting a lightmap onto a raw drawsurface
------------------------------------------------------------------------------- */
/*
CompareLightSurface()
compare function for qsort()
*/
static int CompareLightSurface(const void *a, const void *b)
{
shaderInfo_t *asi, *bsi;
/* get shaders */
asi = surfaceInfos[*((int *)a)].si;
bsi = surfaceInfos[*((int *)b)].si;
/* dummy check */
if(asi == NULL)
return -1;
if(bsi == NULL)
return 1;
/* compare shader names */
return strcmp(asi->shader, bsi->shader);
}
/*
FinishRawLightmap()
allocates a raw lightmap's necessary buffers
*/
void FinishRawLightmap(rawLightmap_t * lm)
{
int i, j, c, size, *sc;
float is;
surfaceInfo_t *info;
/* sort light surfaces by shader name */
qsort(&lightSurfaces[lm->firstLightSurface], lm->numLightSurfaces, sizeof(int), CompareLightSurface);
/* count clusters */
lm->numLightClusters = 0;
for(i = 0; i < lm->numLightSurfaces; i++)
{
/* get surface info */
info = &surfaceInfos[lightSurfaces[lm->firstLightSurface + i]];
/* add surface clusters */
lm->numLightClusters += info->numSurfaceClusters;
}
/* allocate buffer for clusters and copy */
lm->lightClusters = safe_malloc(lm->numLightClusters * sizeof(*lm->lightClusters));
c = 0;
for(i = 0; i < lm->numLightSurfaces; i++)
{
/* get surface info */
info = &surfaceInfos[lightSurfaces[lm->firstLightSurface + i]];
/* add surface clusters */
for(j = 0; j < info->numSurfaceClusters; j++)
lm->lightClusters[c++] = surfaceClusters[info->firstSurfaceCluster + j];
}
/* set styles */
lm->styles[0] = LS_NORMAL;
for(i = 1; i < MAX_LIGHTMAPS; i++)
lm->styles[i] = LS_NONE;
/* set supersampling size */
lm->sw = lm->w * superSample;
lm->sh = lm->h * superSample;
/* add to super luxel count */
numRawSuperLuxels += (lm->sw * lm->sh);
/* manipulate origin/vecs for supersampling */
if(superSample > 1 && lm->vecs != NULL)
{
/* calc inverse supersample */
is = 1.0f / superSample;
/* scale the vectors and shift the origin */
#if 1
/* new code that works for arbitrary supersampling values */
VectorMA(lm->origin, -0.5, lm->vecs[0], lm->origin);
VectorMA(lm->origin, -0.5, lm->vecs[1], lm->origin);
VectorScale(lm->vecs[0], is, lm->vecs[0]);
VectorScale(lm->vecs[1], is, lm->vecs[1]);
VectorMA(lm->origin, is, lm->vecs[0], lm->origin);
VectorMA(lm->origin, is, lm->vecs[1], lm->origin);
#else
/* old code that only worked with a value of 2 */
VectorScale(lm->vecs[0], is, lm->vecs[0]);
VectorScale(lm->vecs[1], is, lm->vecs[1]);
VectorMA(lm->origin, -is, lm->vecs[0], lm->origin);
VectorMA(lm->origin, -is, lm->vecs[1], lm->origin);
#endif
}
/* allocate bsp lightmap storage */
size = lm->w * lm->h * BSP_LUXEL_SIZE * sizeof(float);
if(lm->bspLuxels[0] == NULL)
lm->bspLuxels[0] = safe_malloc(size);
memset(lm->bspLuxels[0], 0, size);
/* allocate radiosity lightmap storage */
if(bounce)
{
size = lm->w * lm->h * RAD_LUXEL_SIZE * sizeof(float);
if(lm->radLuxels[0] == NULL)
lm->radLuxels[0] = safe_malloc(size);
memset(lm->radLuxels[0], 0, size);
}
/* allocate sampling lightmap storage */
size = lm->sw * lm->sh * SUPER_LUXEL_SIZE * sizeof(float);
if(lm->superLuxels[0] == NULL)
lm->superLuxels[0] = safe_malloc(size);
memset(lm->superLuxels[0], 0, size);
/* allocate origin map storage */
size = lm->sw * lm->sh * SUPER_ORIGIN_SIZE * sizeof(float);
if(lm->superOrigins == NULL)
lm->superOrigins = safe_malloc(size);
memset(lm->superOrigins, 0, size);
/* allocate normal map storage */
size = lm->sw * lm->sh * SUPER_NORMAL_SIZE * sizeof(float);
if(lm->superNormals == NULL)
lm->superNormals = safe_malloc(size);
memset(lm->superNormals, 0, size);
/* allocate floodlight map storage */
size = lm->sw * lm->sh * SUPER_FLOODLIGHT_SIZE * sizeof(float);
if(lm->superFloodLight == NULL)
lm->superFloodLight = safe_malloc(size);
memset(lm->superFloodLight, 0, size);
/* allocate cluster map storage */
size = lm->sw * lm->sh * sizeof(int);
if(lm->superClusters == NULL)
lm->superClusters = safe_malloc(size);
size = lm->sw * lm->sh;
sc = lm->superClusters;
for(i = 0; i < size; i++)
(*sc++) = CLUSTER_UNMAPPED;
/* deluxemap allocation */
if(deluxemap)
{
/* allocate sampling deluxel storage */
size = lm->sw * lm->sh * SUPER_DELUXEL_SIZE * sizeof(float);
if(lm->superDeluxels == NULL)
lm->superDeluxels = safe_malloc(size);
memset(lm->superDeluxels, 0, size);
/* allocate bsp deluxel storage */
size = lm->w * lm->h * BSP_DELUXEL_SIZE * sizeof(float);
if(lm->bspDeluxels == NULL)
lm->bspDeluxels = safe_malloc(size);
memset(lm->bspDeluxels, 0, size);
}
/* add to count */
numLuxels += (lm->sw * lm->sh);
}
/*
AddPatchToRawLightmap()
projects a lightmap for a patch surface
since lightmap calculation for surfaces is now handled in a general way (light_ydnar.c),
it is no longer necessary for patch verts to fall exactly on a lightmap sample
based on AllocateLightmapForPatch()
*/
qboolean AddPatchToRawLightmap(int num, rawLightmap_t * lm)
{
bspDrawSurface_t *ds;
surfaceInfo_t *info;
int x, y;
bspDrawVert_t *verts, *a, *b;
vec3_t delta;
mesh_t src, *subdivided, *mesh;
float sBasis, tBasis, s, t;
float length, widthTable[MAX_EXPANDED_AXIS], heightTable[MAX_EXPANDED_AXIS];
/* patches finish a raw lightmap */
lm->finished = qtrue;
/* get surface and info */
ds = &bspDrawSurfaces[num];
info = &surfaceInfos[num];
/* make a temporary mesh from the drawsurf */
src.width = ds->patchWidth;
src.height = ds->patchHeight;
src.verts = &yDrawVerts[ds->firstVert];
//% subdivided = SubdivideMesh( src, 8, 512 );
subdivided = SubdivideMesh2(src, info->patchIterations);
/* fit it to the curve and remove colinear verts on rows/columns */
PutMeshOnCurve(*subdivided);
mesh = RemoveLinearMeshColumnsRows(subdivided);
FreeMesh(subdivided);
/* find the longest distance on each row/column */
verts = mesh->verts;
memset(widthTable, 0, sizeof(widthTable));
memset(heightTable, 0, sizeof(heightTable));
for(y = 0; y < mesh->height; y++)
{
for(x = 0; x < mesh->width; x++)
{
/* get width */
if(x + 1 < mesh->width)
{
a = &verts[(y * mesh->width) + x];
b = &verts[(y * mesh->width) + x + 1];
VectorSubtract(a->xyz, b->xyz, delta);
length = VectorLength(delta);
if(length > widthTable[x])
widthTable[x] = length;
}
/* get height */
if(y + 1 < mesh->height)
{
a = &verts[(y * mesh->width) + x];
b = &verts[((y + 1) * mesh->width) + x];
VectorSubtract(a->xyz, b->xyz, delta);
length = VectorLength(delta);
if(length > heightTable[y])
heightTable[y] = length;
}
}
}
/* determine lightmap width */
length = 0;
for(x = 0; x < (mesh->width - 1); x++)
length += widthTable[x];
lm->w = ceil(length / lm->sampleSize) + 1;
if(lm->w < ds->patchWidth)
lm->w = ds->patchWidth;
if(lm->w > lm->customWidth)
lm->w = lm->customWidth;
sBasis = (float)(lm->w - 1) / (float)(ds->patchWidth - 1);
/* determine lightmap height */
length = 0;
for(y = 0; y < (mesh->height - 1); y++)
length += heightTable[y];
lm->h = ceil(length / lm->sampleSize) + 1;
if(lm->h < ds->patchHeight)
lm->h = ds->patchHeight;
if(lm->h > lm->customHeight)
lm->h = lm->customHeight;
tBasis = (float)(lm->h - 1) / (float)(ds->patchHeight - 1);
/* free the temporary mesh */
FreeMesh(mesh);
/* set the lightmap texture coordinates in yDrawVerts */
lm->wrap[0] = qtrue;
lm->wrap[1] = qtrue;
verts = &yDrawVerts[ds->firstVert];
for(y = 0; y < ds->patchHeight; y++)
{
t = (tBasis * y) + 0.5f;
for(x = 0; x < ds->patchWidth; x++)
{
s = (sBasis * x) + 0.5f;
verts[(y * ds->patchWidth) + x].lightmap[0][0] = s * superSample;
verts[(y * ds->patchWidth) + x].lightmap[0][1] = t * superSample;
if(y == 0 && !VectorCompare(verts[x].xyz, verts[((ds->patchHeight - 1) * ds->patchWidth) + x].xyz))
lm->wrap[1] = qfalse;
}
if(!VectorCompare(verts[(y * ds->patchWidth)].xyz, verts[(y * ds->patchWidth) + (ds->patchWidth - 1)].xyz))
lm->wrap[0] = qfalse;
}
/* debug code: */
//% Sys_Printf( "wrap S: %d wrap T: %d\n", lm->wrap[ 0 ], lm->wrap[ 1 ] );
//% if( lm->w > (ds->lightmapWidth & 0xFF) || lm->h > (ds->lightmapHeight & 0xFF) )
//% Sys_Printf( "Patch lightmap: (%3d %3d) > (%3d, %3d)\n", lm->w, lm->h, ds->lightmapWidth & 0xFF, ds->lightmapHeight & 0xFF );
//% ds->lightmapWidth = lm->w | (ds->lightmapWidth & 0xFFFF0000);
//% ds->lightmapHeight = lm->h | (ds->lightmapHeight & 0xFFFF0000);
/* add to counts */
numPatchesLightmapped++;
/* return */
return qtrue;
}
/*
AddSurfaceToRawLightmap()
projects a lightmap for a surface
based on AllocateLightmapForSurface()
*/
qboolean AddSurfaceToRawLightmap(int num, rawLightmap_t * lm)
{
bspDrawSurface_t *ds, *ds2;
surfaceInfo_t *info, *info2;
int num2, n, i, axisNum;
float s, t, d, len, sampleSize;
vec3_t mins, maxs, origin, faxis, size, exactSize, delta, normalized, vecs[2];
vec4_t plane;
bspDrawVert_t *verts;
/* get surface and info */
ds = &bspDrawSurfaces[num];
info = &surfaceInfos[num];
/* add the surface to the raw lightmap */
lightSurfaces[numLightSurfaces++] = num;
lm->numLightSurfaces++;
/* does this raw lightmap already have any surfaces? */
if(lm->numLightSurfaces > 1)
{
/* surface and raw lightmap must have the same lightmap projection axis */
if(VectorCompare(info->axis, lm->axis) == qfalse)
return qfalse;
/* match identical attributes */
if(info->sampleSize != lm->sampleSize ||
info->entityNum != lm->entityNum ||
info->recvShadows != lm->recvShadows ||
info->si->lmCustomWidth != lm->customWidth ||
info->si->lmCustomHeight != lm->customHeight ||
info->si->lmBrightness != lm->brightness ||
info->si->lmFilterRadius != lm->filterRadius || info->si->splotchFix != lm->splotchFix)
return qfalse;
/* surface bounds must intersect with raw lightmap bounds */
for(i = 0; i < 3; i++)
{
if(info->mins[i] > lm->maxs[i])
return qfalse;
if(info->maxs[i] < lm->mins[i])
return qfalse;
}
/* plane check (fixme: allow merging of nonplanars) */
if(info->si->lmMergable == qfalse)
{
if(info->plane == NULL || lm->plane == NULL)
return qfalse;
/* compare planes */
for(i = 0; i < 4; i++)
if(fabs(info->plane[i] - lm->plane[i]) > EQUAL_EPSILON)
return qfalse;
}
/* debug code hacking */
//% if( lm->numLightSurfaces > 1 )
//% return qfalse;
}
/* set plane */
if(info->plane == NULL)
lm->plane = NULL;
/* add surface to lightmap bounds */
AddPointToBounds(info->mins, lm->mins, lm->maxs);
AddPointToBounds(info->maxs, lm->mins, lm->maxs);
/* check to see if this is a non-planar patch */
if(ds->surfaceType == MST_PATCH && lm->axis[0] == 0.0f && lm->axis[1] == 0.0f && lm->axis[2] == 0.0f)
return AddPatchToRawLightmap(num, lm);
/* start with initially requested sample size */
sampleSize = lm->sampleSize;
/* round to the lightmap resolution */
for(i = 0; i < 3; i++)
{
exactSize[i] = lm->maxs[i] - lm->mins[i];
mins[i] = sampleSize * floor(lm->mins[i] / sampleSize);
maxs[i] = sampleSize * ceil(lm->maxs[i] / sampleSize);
size[i] = (maxs[i] - mins[i]) / sampleSize + 1.0f;
/* hack (god this sucks) */
if(size[i] > lm->customWidth || size[i] > lm->customHeight || (lmLimitSize && size[i] > lmLimitSize))
{
i = -1;
sampleSize += 1.0f;
}
}
if(sampleSize != lm->sampleSize && lmLimitSize == 0)
{
Sys_FPrintf(SYS_VRB,
"WARNING: surface at (%6.0f %6.0f %6.0f) (%6.0f %6.0f %6.0f) too large for desired samplesize/lightmapsize/lightmapscale combination, increased samplesize from %d to %d\n",
info->mins[0], info->mins[1], info->mins[2], info->maxs[0], info->maxs[1], info->maxs[2], lm->sampleSize,
(int)sampleSize);
}
/* set actual sample size */
lm->actualSampleSize = sampleSize;
/* fixme: copy rounded mins/maxes to lightmap record? */
if(lm->plane == NULL)
{
VectorCopy(mins, lm->mins);
VectorCopy(maxs, lm->maxs);
VectorCopy(mins, origin);
}
/* set lightmap origin */
VectorCopy(lm->mins, origin);
/* make absolute axis */
faxis[0] = fabs(lm->axis[0]);
faxis[1] = fabs(lm->axis[1]);
faxis[2] = fabs(lm->axis[2]);
/* clear out lightmap vectors */
memset(vecs, 0, sizeof(vecs));
/* classify the plane (x y or z major) (ydnar: biased to z axis projection) */
if(faxis[2] >= faxis[0] && faxis[2] >= faxis[1])
{
axisNum = 2;
lm->w = size[0];
lm->h = size[1];
vecs[0][0] = 1.0f / sampleSize;
vecs[1][1] = 1.0f / sampleSize;
}
else if(faxis[0] >= faxis[1] && faxis[0] >= faxis[2])
{
axisNum = 0;
lm->w = size[1];
lm->h = size[2];
vecs[0][1] = 1.0f / sampleSize;
vecs[1][2] = 1.0f / sampleSize;
}
else
{
axisNum = 1;
lm->w = size[0];
lm->h = size[2];
vecs[0][0] = 1.0f / sampleSize;
vecs[1][2] = 1.0f / sampleSize;
}
/* check for bogus axis */
if(faxis[axisNum] == 0.0f)
{
Sys_Printf("WARNING: ProjectSurfaceLightmap: Chose a 0 valued axis\n");
lm->w = lm->h = 0;
return qfalse;
}
/* store the axis number in the lightmap */
lm->axisNum = axisNum;
/* walk the list of surfaces on this raw lightmap */
for(n = 0; n < lm->numLightSurfaces; n++)
{
/* get surface */
num2 = lightSurfaces[lm->firstLightSurface + n];
ds2 = &bspDrawSurfaces[num2];
info2 = &surfaceInfos[num2];
verts = &yDrawVerts[ds2->firstVert];
/* set the lightmap texture coordinates in yDrawVerts in [0, superSample * lm->customWidth] space */
for(i = 0; i < ds2->numVerts; i++)
{
VectorSubtract(verts[i].xyz, origin, delta);
s = DotProduct(delta, vecs[0]) + 0.5f;
t = DotProduct(delta, vecs[1]) + 0.5f;
verts[i].lightmap[0][0] = s * superSample;
verts[i].lightmap[0][1] = t * superSample;
if(s > (float)lm->w || t > (float)lm->h)
{
Sys_FPrintf(SYS_VRB, "WARNING: Lightmap texture coords out of range: S %1.4f > %3d || T %1.4f > %3d\n",
s, lm->w, t, lm->h);
}
}
}
/* get first drawsurface */
num2 = lightSurfaces[lm->firstLightSurface];
ds2 = &bspDrawSurfaces[num2];
info2 = &surfaceInfos[num2];
verts = &yDrawVerts[ds2->firstVert];
/* calculate lightmap origin */
if(VectorLength(ds2->lightmapVecs[2]))
VectorCopy(ds2->lightmapVecs[2], plane);
else
VectorCopy(lm->axis, plane);
plane[3] = DotProduct(verts[0].xyz, plane);
VectorCopy(origin, lm->origin);
d = DotProduct(lm->origin, plane) - plane[3];
d /= plane[axisNum];
lm->origin[axisNum] -= d;
/* legacy support */
VectorCopy(lm->origin, ds->lightmapOrigin);
/* for planar surfaces, create lightmap vectors for st->xyz conversion */
if(VectorLength(ds->lightmapVecs[2]) || 1) /* ydnar: can't remember what exactly i was thinking here... */
{
/* allocate space for the vectors */
lm->vecs = safe_malloc(3 * sizeof(vec3_t));
memset(lm->vecs, 0, 3 * sizeof(vec3_t));
VectorCopy(ds->lightmapVecs[2], lm->vecs[2]);
/* project stepped lightmap blocks and subtract to get planevecs */
for(i = 0; i < 2; i++)
{
len = VectorNormalize2(vecs[i], normalized);
VectorScale(normalized, (1.0 / len), lm->vecs[i]);
d = DotProduct(lm->vecs[i], plane);
d /= plane[axisNum];
lm->vecs[i][axisNum] -= d;
}
}
else
{
/* lightmap vectors are useless on a non-planar surface */
lm->vecs = NULL;
}
/* add to counts */
if(ds->surfaceType == MST_PATCH)
{
numPatchesLightmapped++;
if(lm->plane != NULL)
numPlanarPatchesLightmapped++;
}
else
{
if(lm->plane != NULL)
numPlanarsLightmapped++;
else
numNonPlanarsLightmapped++;
}
/* return */
return qtrue;
}
/*
CompareSurfaceInfo()
compare function for qsort()
*/
static int CompareSurfaceInfo(const void *a, const void *b)
{
surfaceInfo_t *aInfo, *bInfo;
int i;
/* get surface info */
aInfo = &surfaceInfos[*((int *)a)];
bInfo = &surfaceInfos[*((int *)b)];
/* model first */
if(aInfo->modelindex < bInfo->modelindex)
return 1;
else if(aInfo->modelindex > bInfo->modelindex)
return -1;
/* then lightmap status */
if(aInfo->hasLightmap < bInfo->hasLightmap)
return 1;
else if(aInfo->hasLightmap > bInfo->hasLightmap)
return -1;
/* 27: then shader! */
if(aInfo->si < bInfo->si)
return 1;
else if(aInfo->si > bInfo->si)
return -1;
/* then lightmap sample size */
if(aInfo->sampleSize < bInfo->sampleSize)
return 1;
else if(aInfo->sampleSize > bInfo->sampleSize)
return -1;
/* then lightmap axis */
for(i = 0; i < 3; i++)
{
if(aInfo->axis[i] < bInfo->axis[i])
return 1;
else if(aInfo->axis[i] > bInfo->axis[i])
return -1;
}
/* then plane */
if(aInfo->plane == NULL && bInfo->plane != NULL)
return 1;
else if(aInfo->plane != NULL && bInfo->plane == NULL)
return -1;
else if(aInfo->plane != NULL && bInfo->plane != NULL)
{
for(i = 0; i < 4; i++)
{
if(aInfo->plane[i] < bInfo->plane[i])
return 1;
else if(aInfo->plane[i] > bInfo->plane[i])
return -1;
}
}
/* then position in world */
for(i = 0; i < 3; i++)
{
if(aInfo->mins[i] < bInfo->mins[i])
return 1;
else if(aInfo->mins[i] > bInfo->mins[i])
return -1;
}
/* these are functionally identical (this should almost never happen) */
return 0;
}
/*
SetupSurfaceLightmaps()
allocates lightmaps for every surface in the bsp that needs one
this depends on yDrawVerts being allocated
*/
void SetupSurfaceLightmaps(void)
{
int i, j, k, s, num, num2;
bspModel_t *model;
bspLeaf_t *leaf;
bspDrawSurface_t *ds, *ds2;
surfaceInfo_t *info, *info2;
rawLightmap_t *lm;
qboolean added;
vec3_t mapSize, entityOrigin;
/* note it */
Sys_FPrintf(SYS_VRB, "--- SetupSurfaceLightmaps ---\n");
/* determine supersample amount */
if(superSample < 1)
superSample = 1;
else if(superSample > 8)
{
Sys_Printf("WARNING: Insane supersampling amount (%d) detected.\n", superSample);
superSample = 8;