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improved normal map calculation

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ehofman 2010-03-14 13:41:56 +00:00 • committed by Tim Moore
parent 4329945e74
commit 19b857d9be
1 changed files with 6 additions and 2 deletions
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8
utils/Modeller/texture.cxx
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@ -901,6 +901,7 @@ SGTexture::make_normalmap(float brightness, float contrast) {
int yp1 = (y < (texture_height-1)) ? y+1 : 0;
int posxp1 = (xp1 + ytw)*num_colors;
int posyp1 = (x + yp1*texture_width)*num_colors;
float fx,fy;
GLubyte c = texture_data[dpos];
GLubyte cx1 = texture_data[posxp1];
@ -918,8 +919,11 @@ SGTexture::make_normalmap(float brightness, float contrast) {
map[mpos+3] = a;
}
map[mpos+0] = (128+(cx1-c)/2);
map[mpos+1] = (128+(cy1-c)/2);
fx = asin(((c-cx1)/256.0)-0.5)+0,785398163;
fy = asin(((cy1-c)/256.0)-0.5)+0,785398163;
map[mpos+0] = (GLuint)(fx*256.0);
map[mpos+1] = (GLuint)(fy*256.0);
map[mpos+2] = 127+int(brightness*128); // 255-c/2;
mpos += colors;