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light: obj exporter

This commit is contained in:
Eric Wasylishen 2016-04-11 00:46:42 -06:00
parent 37d0d14ccd
commit 8228bf979f
1 changed files with 61 additions and 0 deletions
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61
light/light.cc
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@ -657,6 +657,65 @@ LoadExtendedTexinfoFlags(const char *sourcefilename, const bsp2_t *bsp)
fclose(texinfofile);
}
//obj
static FILE *
InitObjFile(const char *filename)
{
FILE *objfile;
char objfilename[1024];
strcpy(objfilename, filename);
StripExtension(objfilename);
DefaultExtension(objfilename, ".obj");
objfile = fopen(objfilename, "wt");
if (!objfile)
Error("Failed to open %s: %s", objfilename, strerror(errno));
return objfile;
}
static void
ExportObjFace(FILE *f, const bsp2_t *bsp, const bsp2_dface_t *face, int *vertcount)
{
// export the vertices and uvs
for (int i=0; i<face->numedges; i++)
{
int vertnum = GetSurfaceVertex(bsp, face, i);
const vec_t *normal = GetSurfaceVertexNormal(bsp, face, i);
const float *pos = bsp->dvertexes[vertnum].point;
fprintf(f, "v %.9g %.9g %.9g\n", pos[0], pos[1], pos[2]);
fprintf(f, "vn %.9g %.9g %.9g\n", normal[0], normal[1], normal[2]);
}
fprintf(f, "f");
for (int i=0; i<face->numedges; i++) {
// .obj vertexes start from 1
// .obj faces are CCW, quake is CW, so reverse the order
const int vertindex = *vertcount + (face->numedges - 1 - i) + 1;
fprintf(f, " %d//%d", vertindex, vertindex);
}
fprintf(f, "\n");
*vertcount += face->numedges;
}
void
ExportObj(const char *filename, const bsp2_t *bsp)
{
FILE *objfile = InitObjFile(filename);
int vertcount = 0;
for (int i=0; i<bsp->numfaces; i++) {
ExportObjFace(objfile, bsp, &bsp->dfaces[i], &vertcount);
}
fclose(objfile);
}
//obj
/*
* ==================
* main
@ -922,6 +981,8 @@ main(int argc, const char **argv)
if (scaledonly && (write_litfile & 2))
bsp->lightdatasize = 0;
ExportObj(source, bsp);
WriteEntitiesToString(bsp);
/* Convert data format back if necessary */
if (loadversion != BSP2VERSION)