ColorFloat Shade(Primitive &primitive, int currPrimitiveNum, Ray &ray, float distance, LightSource *lightSources, int numLightSources, Primitive *primitives, int numPrimitives, int depth)
{
ColorFloat returnColor;
returnColor.r=0;
returnColor.g=0;
returnColor.b=0;
Vector intersection = CalculateIntersection(ray,distance);
Vector normal = CalculateNormal(primitive, intersection);
//specular
for(int i=0; i<numLightSources; i++)
{
Ray rayToLight;
float distanceToLight = CalculateLightRay(lightSources[i].location, intersection, rayToLight); // sets rayToLight
float lightCoef = CalculateLightingCoef(IsShadowed(currPrimitiveNum, rayToLight, distanceToLight, primitives, numPrimitives) , rayToLight.direction, normal);
returnColor.r += primitive.surface.baseColor.r * lightCoef * lightSources[i].color.r; // try checking first if lightCoef is 0... the check will probably be amortized over the
returnColor.g += primitive.surface.baseColor.g * lightCoef * lightSources[i].color.g; // cost of all these multiplications
returnColor.b += primitive.surface.baseColor.b * lightCoef * lightSources[i].color.b;
}
//reflective
if(primitive.surface.reflectivity!=0)
{
ColorFloat reflectedColor = CalculateReflection(ray, intersection, normal, currPrimitiveNum, primitives, numPrimitives, lightSources, numLightSources, depth);
returnColor.r += reflectedColor.r * primitive.surface.reflectivity;
returnColor.g += reflectedColor.g * primitive.surface.reflectivity;
returnColor.b += reflectedColor.b * primitive.surface.reflectivity;
}
return returnColor;
}
void CHardwareBuffer::UpdateFromShadow()
{
if (!IsShadowed())
Error("This hardware buffer is not shadowed.");
}
