C++ (Cpp) WorldToInstance Examples

Example #1

File: Primitive.cpp Project: MaartenBerns/Renderbaardman

bool InstancePrimitive::Intersect(const Ray &r, Intersection *isect) const {
	Ray ray = WorldToInstance(r);
	if (!instance->Intersect(ray, isect))
		return false;
	r.maxt = ray.maxt;
	isect->WorldToObject = isect->WorldToObject * WorldToInstance;
	// TODO: transform instance's differential geometry to world space
	return true;
}

Example #2

File: primitive.cpp Project: BackupTheBerlios/rendertoolbox-svn

// InstancePrimitive Method Definitions
bool InstancePrimitive::Intersect(const Ray &r,
                               Intersection *isect) const {
	Ray ray = WorldToInstance(r);
	if (!instance->Intersect(ray, isect))
		return false;
	r.maxt = ray.maxt;
	isect->WorldToObject = isect->WorldToObject *
		WorldToInstance;
	// Transform instance's differential geometry to world space
	isect->dg.p = InstanceToWorld(isect->dg.p);
	isect->dg.nn = Normalize(InstanceToWorld(isect->dg.nn));
	isect->dg.dpdu = InstanceToWorld(isect->dg.dpdu);
	isect->dg.dpdv = InstanceToWorld(isect->dg.dpdv);
	isect->dg.dndu = InstanceToWorld(isect->dg.dndu);
	isect->dg.dndv = InstanceToWorld(isect->dg.dndv);
	return true;
}

Example #3

File: primitive.cpp Project: BackupTheBerlios/rendertoolbox-svn

bool InstancePrimitive::IntersectP(const Ray &r) const {
	return instance->IntersectP(WorldToInstance(r));
}