SharpMath.float4x4.MakeProjectionPerspective C# (CSharp) 메소드

        public float4x4 MakeProjectionPerspective( float _FOVY, float _AspectRatio, float _Near, float _Far )
        {
            float	H = (float) Math.Tan( 0.5f * _FOVY );
            float	W = _AspectRatio * H;
            float	Q =  _Far / (_Far - _Near);

            MakeIdentity();
            SetRow( 0, new float4( 1.0f / W, 0.0f, 0.0f, 0.0f ) );
            SetRow( 1, new float4( 0.0f, 1.0f / H, 0.0f, 0.0f ) );
            SetRow( 2, new float4( 0.0f, 0.0f, Q, 1.0f ) );
            SetRow( 3, new float4( 0.0f, 0.0f, -_Near * Q, 0.0f ) );

            return this;
        }