Function mtxLookAt

Source/3rdParty/bx/src/math.cpp:28–71

	}

	void mtxLookAt(float* _result, const Vec3& _eye, const Vec3& _at, const Vec3& _up, Handedness::Enum _handedness)
	{
		const Vec3 view = normalize(
			Handedness::Right == _handedness
			? sub(_eye, _at)
			: sub(_at, _eye)
		);

		Vec3 right = bx::InitNone;
		Vec3 up    = bx::InitNone;

		const Vec3 uxv = cross(_up, view);

		if (0.0f == dot(uxv, uxv) )
		{
			right = { Handedness::Left == _handedness ? -1.0f : 1.0f, 0.0f, 0.0f };
		}
		else
		{
			right = normalize(uxv);
		}

		up = cross(view, right);

		_result[ 0] = right.x;
		_result[ 1] = up.x;
		_result[ 2] = view.x;
		_result[ 3] = 0.0f;

		_result[ 4] = right.y;
		_result[ 5] = up.y;
		_result[ 6] = view.y;
		_result[ 7] = 0.0f;

		_result[ 8] = right.z;
		_result[ 9] = up.z;
		_result[10] = view.z;
		_result[11] = 0.0f;

		_result[12] = -dot(right, _eye);
		_result[13] = -dot(up,    _eye);
		_result[14] = -dot(view,  _eye);
		_result[15] = 1.0f;
	}

	static void mtxProjXYWH(float* _result, float _x, float _y, float _width, float _height, float _near, float _far, bool _homogeneousNdc, Handedness::Enum _handedness)
	{