bool RayBouncer::ReflectionBounce( RayBounce& raybounce, const Ray& ray, const Scene& scene, const RayShader& shader, const PrimitiveHit& primitivehit, const real& ior1, const real& ior2, std::size_t depth ) const {
raybounce.ray = ray;
const Primitive& primitive = primitivehit.first;
const PrecalculatedMaterial& material = primitivehit.second;
const Hit& hit = primitivehit.third;
bool hasreflectivity = std::any_of( material.reflectivity.begin( ), material.reflectivity.end( ), real_compare<std::greater<>, 0>( ) );
if ( !hasreflectivity )
return false;
vec3 reflectionraydir = reflect( ray.direction, hit.normal );
Ray reflectionray( hit.contact + reflectionraydir * scene.Bias(),
reflectionraydir );
Bounce( raybounce, reflectionray, scene, shader, primitivehit, depth + 1 );
return true;
}
bool RayBouncer::RefractionBounce( RayBounce& raybounce, const Ray& ray, const Scene& scene, const RayShader& shader, const PrimitiveHit& primitivehit, const real& ior1, const real& ior2, std::size_t depth ) const {
const Primitive& primitive = primitivehit.first;
const PrecalculatedMaterial& material = primitivehit.second;
const Hit& hit = primitivehit.third;
bool hastransparency = std::any_of( material.refractivity.begin( ), material.refractivity.end( ), real_compare<std::less<>, 1>( ) );
if ( !hastransparency )
return false;
Fur::optional<vec3> oprefractionraydir = refract( ray.direction, hit.inside ? hit.normal * real_neg_one : hit.normal, ior1, ior2 );
if ( !oprefractionraydir )
return false;
// Not total internal reflection
const vec3& refractionraydir = *oprefractionraydir;
Ray refractionray( hit.contact + refractionraydir * scene.Bias(), refractionraydir );
raybounce.ray = refractionray;
Bounce( raybounce, refractionray, scene, shader, primitivehit, depth + 1 );
return true;
}