/// <summary>
/// Provides perspective projection matrix.
/// The parameters describe the dimensions of the view volume.
/// </summary>
public static M4__x4t__ PerspectiveProjectionTransformRH(V__x2t__ size, __ft__ n, __ft__ f)
{
__ft__ w = size.X;
__ft__ h = size.Y;
// Fx 0 0 0
// 0 Fy 0 0
// 0 0 A B
// 0 0 -1 0
__ft__ Fx = 2 * n / w;
__ft__ Fy = 2 * n / h;
__ft__ A = f / (n - f);
__ft__ B = n * f / (n - f);
M4__x4t__ P = new M4__x4t__(
Fx, 0, 0, 0,
0, Fy, 0, 0,
0, 0, A, B,
0, 0, -1, 0);
return(P);
}
/// <summary>
/// Returns the outer product (tensor-product) of v1 * v2^T as a 3x3 Matrix.
/// </summary>
public static M2__x2t__ OuterProduct(this V__x2t__ v1, V__x2t__ v2)
{
return(new M2__x2t__(
v2.X * v1.X, v2.Y * v1.X,
v2.X * v1.Y, v2.Y * v1.Y));
}
/// <summary>
/// Multiplacation of a <see cref="Scale__x3t__"/> with a <see cref="V__x2t__"/>.
/// </summary>
public static V__x2t__ Multiply(Scale__x3t__ scale, V__x2t__ v)
{
return(new V__x2t__(v.X * scale.X, v.Y * scale.Y));
}
