private MyColor traceRay(Ray ray, int rayDepth, bool isInShape)
{
//Determine if we hit anything
RayIntersectionResult intersectResult = scene.IntersectRay(ray);
if (intersectResult == null)
{
return(scene.backgroundColor);
}
//Get the primary color (using the illumination model) of what we hit
bool isInShadow = isPointInShadow(intersectResult.intersectionPoint);
MyColor primaryColor = getColorAtPoint(intersectResult.intersectedShape, intersectResult.intersectionPoint, isInShadow);
//If we've hit the max ray depth, stop.
if (rayDepth >= MAX_RAY_DEPTH)
{
return(primaryColor);
}
MyColor reflectionColor = new MyColor();
MyColor refractionColor = new MyColor();
//Trace reflection ray
if (intersectResult.intersectedShape.reflectionAmount > 0)
{
Ray reflectionRay = getReflectionRay(intersectResult.intersectedShape, intersectResult.intersectionPoint, ray);
reflectionColor = traceRay(reflectionRay, rayDepth + 1, isInShape);
}
//Trace refraction ray
if (intersectResult.intersectedShape.refractionAmount > 0)
{
Ray refractionRay = getRefractionRay(intersectResult.intersectedShape, intersectResult.intersectionPoint, ray, isInShape);
refractionColor = traceRay(refractionRay, rayDepth + 1, !isInShape);
}
return(primaryColor * intersectResult.intersectedShape.ownColorAmount +
reflectionColor * intersectResult.intersectedShape.reflectionAmount +
refractionColor * intersectResult.intersectedShape.refractionAmount);
}
public Scene()
{
shapes = new List <Shape>();
backgroundColor = new MyColor(); //Constructor defaults to black
}
public static System.Drawing.Color ToSystemColor(MyColor c)
{
return(System.Drawing.Color.FromArgb(Convert.ToByte(c.red * 255), Convert.ToByte(c.green * 255), Convert.ToByte(c.blue * 255)));
}