// This should be added to SharpDX.
private static Matrix3x2 Invert(Matrix3x2 value)
{
Matrix3x2 result = Matrix3x2.Identity;
float determinant = value.Determinant();
if (determinant == 0.0f)
{
return(value);
}
float invdet = 1.0f / determinant;
float offsetX = value.M31;
float offsetY = value.M32;
return(new Matrix3x2(
value.M22 * invdet,
-value.M12 * invdet,
-value.M21 * invdet,
value.M11 * invdet,
((value.M21 * offsetY) - (offsetX * value.M22)) * invdet,
((offsetX * value.M12) - (value.M11 * offsetY)) * invdet));
}