void GenericImage::gen_normalMap(const char* filename)
{
GenericImage dst;
dst.width = width;
dst.height = height;
dst.components = 3;
dst.pixels = (unsigned char*)malloc(width * height * 3);
char* nmap = gen_normal();
//cast from char to unsigned char to save as an normalmap image
//and be able to look at the normalmap and make sense
int index=0;
unsigned char* p = (unsigned char*)dst.pixels;
for(int y = 0; y < height; y++)
{
for(int x = 0; x < width; x++)
{
p[3*index + 0] = (unsigned char)(nmap[3*index + 0] + 127);
p[3*index + 1] = (unsigned char)(nmap[3*index + 1] + 127);
p[3*index + 2] = (unsigned char)(nmap[3*index + 2] + 127);
//fprintf(stderr, "normal map[%d](%d, %d, %d)\n", index, nmap[3*index + 0], nmap[3*index + 1], nmap[3*index + 2]);
index++;
}
}
bool ret = dst.save(filename);
if(ret) printf("success! normalmap saved to image %s\n", filename);
else printf("error! normalmap save to image %s failed\n", filename);
}
int main(void)
{
for(size_t i=0; i<10; ++i)
std::cout<<gen_normal()
<<std::endl;
}
