/** Raytrace one frame. */ private void raytrace() { double aspect = width / (double) height; Ray ray = new Ray(); camPos.set(0, -distance, 0); transform.transform(camPos); camPos.add(.5, .5, .5); for (int x = 0; x < width; ++x) { double rayx = fovTan * aspect * (.5 - ((double) x) / width); for (int y = 0; y < height; ++y) { ray.setDefault(); ray.d.set(rayx, 1, fovTan * (.5 - ((double) y) / height)); ray.d.normalize(); transform.transform(ray.d); ray.o.set(camPos); raytrace(ray); ray.color.x = QuickMath.min(1, FastMath.sqrt(ray.color.x)); ray.color.y = QuickMath.min(1, FastMath.sqrt(ray.color.y)); ray.color.z = QuickMath.min(1, FastMath.sqrt(ray.color.z)); backBuffer.setRGB(x, y, Color.getRGB(ray.color)); } } }