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#pragma once
#include "Matrix4.h"
/**
* Specialisation of the Matrix4 class offering convenience methods
* for viewprojection-related calculations.
*/
class ViewProjection :
public Matrix4
{
public:
ViewProjection() :
Matrix4()
{}
ViewProjection(const Matrix4& other) :
Matrix4(other)
{}
bool testPoint(const Vector3& point) const;
bool testPoint(const Vector3& point, const Matrix4& localToWorld) const;
};
inline bool ViewProjection::testPoint(const Vector3& point) const
{
Vector4 hpoint = transform(Vector4(point, 1.0f));
if (fabs(hpoint[0]) < fabs(hpoint[3]) &&
fabs(hpoint[1]) < fabs(hpoint[3]) &&
fabs(hpoint[2]) < fabs(hpoint[3]))
{
return true;
}
return false;
}
inline bool ViewProjection::testPoint(const Vector3& point, const Matrix4& localToWorld) const
{
return testPoint(localToWorld.transformPoint(point));
}
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