/// <summary>
/// Specify the scale matrix
/// </summary>
/// <param name="vectorScale"></param>
/// <returns></returns>
public static Matrix4f Scale(Vec2 vectorScale)
{
Matrix4f res = Matrix4f.Identity();
res.Matrix[0 + 0 * 4] = vectorScale.X;
res.Matrix[1 + 1 * 4] = vectorScale.Y;
res.Matrix[2 + 2 * 4] = 1.0f;
return(res);
}
/// <summary>
/// Matrix translation matrix formed from a vectoroffset
/// </summary>
/// <param name="VectorOffset"></param>
/// <returns></returns>
public static Matrix4f Translate(Vec2 VectorOffset)
{
Matrix4f res = Matrix4f.Identity();
res.Matrix[0 + 3 * 4] = VectorOffset.X;
res.Matrix[1 + 3 * 4] = VectorOffset.Y;
res.Matrix[2 + 3 * 4] = 0f;
return(res);
}
/// <summary>
/// Specify the rotation matrix for z in degrees
/// </summary>
/// <param name="angleDegrees"></param>
/// <returns></returns>
public static Matrix4f RotateZ(float angleDegrees)
{
Matrix4f res = Matrix4f.Identity();
float rad = angleDegrees * ((float)Math.PI / 180);
float cos = (float)Math.Cos(rad);
float sin = (float)Math.Sin(rad);
res.Matrix[0 + 0 * 4] = cos;
res.Matrix[0 + 1 * 4] = -sin;
res.Matrix[1 + 0 * 4] = sin;
res.Matrix[1 + 1 * 4] = cos;
return(res);
}