RepoMirrors/xonotic
1
0
Fork 0
mirror of https://gitlab.com/xonotic/xonotic synced 2025-01-18 20:21:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

also add normalmap to heightmap, but this way is bad :P better use gimp-normalmap plugin

Browse Source
This commit is contained in:
Rudolf Polzer 2010-08-22 18:54:24 +02:00
parent c151bbe676
commit 71e33d08cb
1 changed files with 127 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

135
misc/tools/fft-normalmap-to-heightmap.c
View File

@ -161,12 +161,6 @@ void nmap_to_hmap(unsigned char *map, int w, int h, double scale, double offset)
v = -1;
if(v > 1)
v = 1;
/*
map[(w*y+x)*4+0] = 128 + 127 * v;
map[(w*y+x)*4+1] = 128 + 127 * v;
map[(w*y+x)*4+2] = 128 + 127 * v;
map[(w*y+x)*4+3] = 255;
*/
map[(w*y+x)*4+3] = floor(128.5 + 127 * v);
}
@ -180,6 +174,122 @@ void nmap_to_hmap(unsigned char *map, int w, int h, double scale, double offset)
fftw_free(imgspace1);
}
void hmap_to_nmap(unsigned char *map, int w, int h, int src_chan, double scale)
{
int x, y;
double nx, ny, nz;
double v, vmin, vmax;
#ifndef C99
double save;
#endif
fftw_complex *imgspace1 = fftw_malloc(w*h * sizeof(fftw_complex));
fftw_complex *imgspace2 = fftw_malloc(w*h * sizeof(fftw_complex));
fftw_complex *freqspace1 = fftw_malloc(w*h * sizeof(fftw_complex));
fftw_complex *freqspace2 = fftw_malloc(w*h * sizeof(fftw_complex));
fftw_plan i12f1 = fftw_plan_dft_2d(w, h, imgspace1, freqspace1, FFTW_FORWARD, FFTW_ESTIMATE);
fftw_plan f12i1 = fftw_plan_dft_2d(w, h, freqspace1, imgspace1, FFTW_BACKWARD, FFTW_ESTIMATE);
fftw_plan f22i2 = fftw_plan_dft_2d(w, h, freqspace2, imgspace2, FFTW_BACKWARD, FFTW_ESTIMATE);
for(y = 0; y < h; ++y)
for(x = 0; x < w; ++x)
{
switch(src_chan)
{
case 0:
case 1:
case 2:
case 3:
v = map[(w*y+x)*4+src_chan];
break;
case 4:
v = (map[(w*y+x)*4+0] + map[(w*y+x)*4+1] + map[(w*y+x)*4+2]) / 3;
break;
default:
case 5:
v = (map[(w*y+x)*4+0]*0.114 + map[(w*y+x)*4+1]*0.587 + map[(w*y+x)*4+2]*0.299);
break;
}
#ifdef C99
imgspace1[(w*y+x)] = (v - 128.0) / 127.0;
#else
imgspace1[(w*y+x)][0] = (v - 128.0) / 127.0;
imgspace1[(w*y+x)][1] = 0;
#endif
map[(w*y+x)*4+3] = floor(v + 0.5);
}
/* see http://www.gamedev.net/community/forums/topic.asp?topic_id=561430 */
fftw_execute(i12f1);
for(y = 0; y < h; ++y)
for(x = 0; x < w; ++x)
{
int fx = x;
int fy = y;
if(fx > w/2)
fx -= w;
if(fy > h/2)
fy -= h;
#ifdef C99
/* a lowpass to prevent the worst */
freqspace1[(w*y+x)] *= 1 - pow(abs(fx) / (double)(w/2), 1);
freqspace1[(w*y+x)] *= 1 - pow(abs(fy) / (double)(h/2), 1);
freqspace2[(w*y+x)] = I * fy * freqspace1[(w*y+x)]; /* y derivative */
freqspace1[(w*y+x)] = I * fx * freqspace1[(w*y+x)]; /* x derivative */
#else
/* a lowpass to prevent the worst */
freqspace1[(w*y+x)][0] *= 1 - pow(abs(fx) / (double)(w/2), 1);
freqspace1[(w*y+x)][1] *= 1 - pow(abs(fx) / (double)(w/2), 1);
freqspace1[(w*y+x)][0] *= 1 - pow(abs(fy) / (double)(h/2), 1);
freqspace1[(w*y+x)][1] *= 1 - pow(abs(fy) / (double)(h/2), 1);
freqspace2[(w*y+x)][0] = -fy * freqspace1[(w*y+x)][1]; /* y derivative */
freqspace2[(w*y+x)][1] = fy * freqspace1[(w*y+x)][0];
save = freqspace1[(w*y+x)][0];
freqspace1[(w*y+x)][0] = -fx * freqspace1[(w*y+x)][1]; /* x derivative */
freqspace1[(w*y+x)][1] = fx * save;
#endif
}
fftw_execute(f12i1);
fftw_execute(f22i2);
scale /= (w*h);
for(y = 0; y < h; ++y)
for(x = 0; x < w; ++x)
{
#ifdef C99
nx = creal(imgspace1[(w*y+x)]);
ny = creal(imgspace2[(w*y+x)]);
#else
nx = imgspace1[(w*y+x)][0];
ny = imgspace2[(w*y+x)][0];
#endif
nz = 1 / scale;
v = sqrt(nx*nx + ny*ny + nz*nz);
nx /= v;
ny /= v;
nz /= v;
ny = -ny; /* DP inverted normals */
map[(w*y+x)*4+2] = floor(127.5 + 127.5 * nx);
map[(w*y+x)*4+1] = floor(127.5 + 127.5 * ny);
map[(w*y+x)*4+0] = floor(127.5 + 127.5 * nz);
}
fftw_destroy_plan(i12f1);
fftw_destroy_plan(f12i1);
fftw_destroy_plan(f22i2);
fftw_free(freqspace2);
fftw_free(freqspace1);
fftw_free(imgspace2);
fftw_free(imgspace1);
}
unsigned char *FS_LoadFile(const char *fn, int *len)
{
unsigned char *buf = NULL;
@ -663,7 +773,13 @@ int Image_WriteTGABGRA (const char *filename, int width, int height, const unsig
int usage(const char *me)
{
printf("Usage: %s <infile.tga> <outfile.tga> [<scale> [<offset>]]\n", me);
printf("Usage: %s <infile_norm.tga> <outfile_normandheight.tga> [<scale> [<offset>]] (get heightmap from normalmap)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -1 [<scale>] (read from R)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -2 [<scale>] (read from G)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -3 [<scale>] (read from R)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -4 [<scale>] (read from A)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -5 [<scale>] (read from (R+G+B)/3)\n", me);
printf("or: %s <infile_height.tga> <outfile_normandheight.tga> -6 [<scale>] (read from Y)\n", me);
return 1;
}
@ -707,7 +823,10 @@ int main(int argc, char **argv)
printf("LoadTGA_BGRA failed\n");
return 2;
}
nmap_to_hmap(nmap, image_width, image_height, scale, offset);
if(scale < 0)
hmap_to_nmap(nmap, image_width, image_height, -scale-1, offset);
else
nmap_to_hmap(nmap, image_width, image_height, scale, offset);
if(!Image_WriteTGABGRA(outfile, image_width, image_height, nmap))
{
printf("Image_WriteTGABGRA failed\n");