RepoMirrors/xonotic
1
0
Fork 0
mirror of https://gitlab.com/xonotic/xonotic synced 2024-12-16 20:04:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

make the algorithm a bit more customizable

Browse Source
This commit is contained in:
Rudolf Polzer 2010-08-26 06:05:04 +02:00
parent 53f03d541f
commit 6dcb9aea90
1 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
misc/tools/fft-normalmap-to-heightmap.c
View File

@ -38,6 +38,8 @@
void nmap_to_hmap(unsigned char *map, const unsigned char *refmap, int w, int h, double scale, double offset)
{
int x, y;
int fx, fy;
int ffx, ffy;
double nx, ny, nz;
double v, vmin, vmax;
#ifndef C99
@ -86,23 +88,26 @@ void nmap_to_hmap(unsigned char *map, const unsigned char *refmap, int w, int h,
for(y = 0; y < h; ++y)
for(x = 0; x < w; ++x)
{
int fx = x;
int fy = y;
fx = x;
fy = y;
if(fx > w/2)
fx -= w;
if(fy > h/2)
fy -= h;
/* these must have the same sign as fx and fy (so ffx*fx + ffy*fy is nonzero), otherwise do not matter */
ffx = fx;
ffy = fy;
#ifdef C99
if(fx||fy)
freqspace1[(w*y+x)] = _Complex_I * (fx * freqspace1[(w*y+x)] + fy * freqspace2[(w*y+x)]) / (fx*fx + fy*fy) / TWO_PI;
freqspace1[(w*y+x)] = _Complex_I * (ffx * freqspace1[(w*y+x)] + ffy * freqspace2[(w*y+x)]) / (ffx*fx + ffy*fy) / TWO_PI;
else
freqspace1[(w*y+x)] = 0;
#else
if(fx||fy)
{
save = freqspace1[(w*y+x)][0];
freqspace1[(w*y+x)][0] = -(fx * freqspace1[(w*y+x)][1] + fy * freqspace2[(w*y+x)][1]) / (fx*fx + fy*fy) / TWO_PI;
freqspace1[(w*y+x)][1] = (fx * save + fy * freqspace2[(w*y+x)][0]) / (fx*fx + fy*fy) / TWO_PI;
freqspace1[(w*y+x)][0] = -(ffx * freqspace1[(w*y+x)][1] + ffy * freqspace2[(w*y+x)][1]) / (ffx*fx + ffy*fy) / TWO_PI;
freqspace1[(w*y+x)][1] = (ffx * save + ffy * freqspace2[(w*y+x)][0]) / (ffx*fx + ffy*fy) / TWO_PI;
}
else
{