Lighting texture creation

gistfile1.cpp

// lr,lg,lb - light color
// spec = specular power
int idx = 0;
for (int y = 0; y < height; ++y)
{
	for (int x = 0; x < width; ++x, idx+=4)
	{
		float vx = float(x) / width;
		float vy = float(y) / height;
		float nl = vx;
		float nh = vy;
		float s = powf (nh, spec);
		data[idx+0] = nl * lr * 255.0f;
		data[idx+1] = nl * lg * 255.0f;
		data[idx+2] = nl * lb * 255.0f;
		data[idx+3] = s * 255.0f;
	}
}