void LoadCubeMap(const char *dir, const char *ext)
{
char path[FILENAME_MAX];
CubeTexParameters(GL_TEXTURE_CUBE_MAP);
sprintf(path, "%s/left.%s", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, path);
sprintf(path, "%s/right.%s", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_POSITIVE_X, path);
sprintf(path, "%s/bottom.%s", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, path);
sprintf(path, "%s/top.%s", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, path);
sprintf(path, "%s/back.%s", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, path);
sprintf(path, "%s/front.%s", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, path);
}
void LoadCubeMap(const char *dir, const char *ext)
{
std::string path;
CubeTexParameters(GL_TEXTURE_CUBE_MAP);
io::sprintf(path, "{1}/left.{2}", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, path);
io::sprintf(path, "{1}/right.{2}", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_POSITIVE_X, path);
io::sprintf(path, "{1}/bottom.{2}", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, path);
io::sprintf(path, "{1}/top.{2}", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, path);
io::sprintf(path, "{1}/back.{[2}", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, path);
io::sprintf(path, "{1}/front.{2}", dir, ext);
LoadCubeFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, path);
}
void NormalCubeMap(int power)
{
int size = 1 << power;
int half = size >> 1;
char map[6][size][size][3];
for (int i = 0; i < size; ++i)
{
double v = 0.5 + i - half;
for (int j = 0; j < size; ++j)
{
double u = 0.5 + j - half;
CubeMapPackPixel(map[0][i][j], +half, -v, -u);
CubeMapPackPixel(map[1][i][j], -half, -v, +u);
CubeMapPackPixel(map[2][i][j], +u, +half, +v);
CubeMapPackPixel(map[3][i][j], +u, -half, -v);
CubeMapPackPixel(map[4][i][j], +u, -v, +half);
CubeMapPackPixel(map[5][i][j], -u, -v, -half);
}
}
CubeTexParameters(GL_TEXTURE_CUBE_MAP);
glTexImage2D
(GL_TEXTURE_CUBE_MAP_POSITIVE_X
,0
,GL_RGB
,size
,size
,0
,GL_RGB
,GL_UNSIGNED_BYTE
,map[0]
);
glTexImage2D
(GL_TEXTURE_CUBE_MAP_NEGATIVE_X
,0
,GL_RGB
,size
,size
,0
,GL_RGB
,GL_UNSIGNED_BYTE
,map[1]
);
glTexImage2D
(GL_TEXTURE_CUBE_MAP_POSITIVE_Y
,0
,GL_RGB
,size
,size
,0
,GL_RGB
,GL_UNSIGNED_BYTE
,map[2]
);
glTexImage2D
(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y
,0
,GL_RGB
,size
,size
,0
,GL_RGB
,GL_UNSIGNED_BYTE
,map[3]
);
glTexImage2D
(GL_TEXTURE_CUBE_MAP_POSITIVE_Z
,0
,GL_RGB
,size
,size
,0
,GL_RGB
,GL_UNSIGNED_BYTE
,map[4]
);
glTexImage2D
(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
,0
,GL_RGB
,size
,size
,0
,GL_RGB
,GL_UNSIGNED_BYTE
,map[5]
);
}