PEmpty.h

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#pragma once
 
#include "Core/Intersection/Primitive.h"
#include "Math/Geometry/TAABB3D.h"
 
#include <Common/assertion.h>
 
namespace ph
{
 
class PEmpty : public Primitive
{
public:
    PEmpty();
 
    bool isIntersecting(const Ray& ray, HitProbe& probe) const override;
 
    bool reintersect(
        const Ray& ray,
        HitProbe& probe,
        const Ray& srcRay,
        HitProbe& srcProbe) const override;
 
    void calcHitDetail(
        const Ray& ray, 
        HitProbe&  probe,
        HitDetail* out_detail) const override;
 
    bool isOccluding(const Ray& ray) const override;
 
    bool mayOverlapVolume(const math::AABB3D& volume) const override;
    math::AABB3D calcAABB() const override;
};
 
// In-header Implementation:
 
inline PEmpty::PEmpty() : 
    Primitive()
{}
 
inline bool PEmpty::isIntersecting(const Ray& ray, HitProbe& probe) const
{
    return false;
}
 
inline bool PEmpty::isOccluding(const Ray& ray) const
{
    return false;
}
 
inline bool PEmpty::reintersect(
    const Ray& /* ray */,
    HitProbe& /* probe */,
    const Ray& /* srcRay */,
    HitProbe& /* srcProbe */) const
{
    return false;
}
 
inline void PEmpty::calcHitDetail(
    const Ray& ray,
    HitProbe&  probe,
    HitDetail* const out_detail) const
{
    // An empty always returns false for intersection probing, it is therefore
    // impossible to have this method called with a valid HitProbe instance.
    PH_ASSERT_UNREACHABLE_SECTION();
}
 
inline bool PEmpty::mayOverlapVolume(const math::AABB3D& volume) const
{
    return false;
}
 
inline math::AABB3D PEmpty::calcAABB() const
{
    return math::AABB3D::makeEmpty();
}
 
}// end namespace ph