public Color GetColor(Ray ray, float distance, RenderObject targetObject, Scene scene)
{
Color returnValue = new Color(color);
Vector3 collisionPoint = ray.GetPoint(distance);
Vector3 normal = targetObject.GetNormalAtPoint(collisionPoint);
Color lightColor = new Color(0, 0, 0);
//Apply directional lights
for (int i = 0; i < scene.lamps.Count; i++)
{
float lightReflected = albedo / MathF.PI;
DirectionalLamp lamp = scene.lamps[i];
Vector3 directionToLamp = (-lamp.direction).GetNormalized();
float lightIntensity = lamp.intensity;
Ray shadowRay = new Ray(collisionPoint + (normal * bias), directionToLamp, -1);
for (int j = 0; j < scene.objects.Count; j++)
{
if (scene.objects[j].CheckCollision(shadowRay, out distance))
{
lightIntensity = 0;
break;
}
}
lightColor += lamp.color * lightReflected * lightIntensity * MathF.Max(0, Vector3.Dot(directionToLamp, normal));
}
returnValue = returnValue * lightColor;
Color reflectionColor = new Color(0, 0, 0);
if (reflectivity > 0 && ray.recusiveNumber > 0)
{
returnValue -= new Color(255, 255, 255) * reflectivity;
Vector3 reflectionOrigin = collisionPoint + (normal * bias);
Vector3 reflectionDirection = ray.direction - (normal * (2.0f * Vector3.Dot(ray.direction, normal)));
Ray reflectionRay = new Ray(reflectionOrigin, reflectionDirection, ray.recusiveNumber - 1);
reflectionColor = reflectionRay.GetCast(scene);
}
returnValue += reflectionColor;
returnValue.Clamp();
return(returnValue);
}
internal void AddLamp(DirectionalLamp lamp)
{
lamps.Add(lamp);
}