#include "Tetrahedron3.h"


namespace GtpVisibilityPreprocessor {


float Tetrahedron3::GetArea() const
{
	float area = 0;
	for (int i = 0; i < 4; ++ i)
		area += GetTriangle(i).GetArea();

	return area;
}


float Tetrahedron3::GetVolume() const
{
	const Vector3 a = mVertices[2] - mVertices[1];
	const Vector3 b = mVertices[3] - mVertices[1];
	const Vector3 c = mVertices[4] - mVertices[1];

	return (1.0f / 6.0f) * fabs(DotProd(a, CrossProd(b, c)));
}


bool Tetrahedron3::Valid() const
{
	return true;
}

}