KdtreeAABB.h

Go to the documentation of this file.

#pragma once
 
#include "Math/Geometry/TAABB3D.h"
#include "Core/Ray.h"
#include "Core/Intersection/Kdtree/kdtree_core.h"
#include "Math/math_fwd.h"
 
#include <Common/primitive_type.h>
 
namespace ph
{
 
// TODO: replace this with TAABB3D
class KdtreeAABB final
{
public:
    KdtreeAABB();
    explicit KdtreeAABB(const math::AABB3D& aabb);
    KdtreeAABB(const math::Vector3R& minVertex, const math::Vector3R& maxVertex);
 
    bool isIntersectingVolume(const Ray& ray, real* const out_rayNearHitDist, real* const out_rayFarHitDist) const;
    bool isIntersectingVolume(const math::AABB3D& aabb) const;
    bool trySplitAt(const int32 axis, const real splitPos, KdtreeAABB* const out_negativeAABB, KdtreeAABB* const out_positiveAABB) const;
 
    void getMinVertex(real* const out_vector3f) const;
    void getMaxVertex(real* const out_vector3f) const;
    real getMinVertex(const int32 axis) const;
    real getMaxVertex(const int32 axis) const;
    void getAABB(math::AABB3D* const out_aabb) const;
 
    inline real getExtent(const int32 axis) const
    {
        real minVertex[KDTREE_NUM_AXES];
        real maxVertex[KDTREE_NUM_AXES];
        getMinVertex(minVertex);
        getMaxVertex(maxVertex);
        return maxVertex[axis] - minVertex[axis];
    }
 
    inline real getSurfaceArea() const
    {
        const real xExtent = m_aabb.getMaxVertex().x() - m_aabb.getMinVertex().x();
        const real yExtent = m_aabb.getMaxVertex().y() - m_aabb.getMinVertex().y();
        const real zExtent = m_aabb.getMaxVertex().z() - m_aabb.getMinVertex().z();
        return 2.0_r * (xExtent * yExtent + yExtent * zExtent + zExtent * xExtent);
    }
 
private:
    math::AABB3D m_aabb;
};
 
}// end namespace ph