// Calculate and return the inverse matrix
public static Perspective operator~(Perspective b)
{
Perspective ret = b;
ret.Invert();
return(ret);
}
//------------------------------------------------------------------------
public Perspective MultiplyInverse(Perspective m)
{
Perspective t = m;
t.Invert();
return(Multiply(t));
}
// Multiply inverse of "m" by "this" and assign the result to "this"
public Perspective PreMultiplyInverse(Affine m)
{
Perspective t = new Perspective(m);
t.Invert();
Set(t.Multiply(this));
return(this);
}
//------------------------------------------------------------------------
public Perspective PreMultiplyInverse(Perspective m)
{
Perspective t = m;
t.Invert();
Set(t.Multiply(this));
return(this);
}
// Inverse transformation of x and y. It works slow because
// it explicitly inverts the matrix on every call. For massive
// operations it's better to Invert() the matrix and then use
// direct transformations.
public void InverseTransform(ref double x, ref double y)
{
Perspective t = new Perspective(this);
if (t.Invert())
{
t.Transform(ref x, ref y);
}
}
// Multiply inverse of "m" by "this" and assign the result to "this"
public Perspective PreMultiplyInverse(Affine m)
{
Perspective t=new Perspective(m);
t.Invert();
Set(t.Multiply(this));
return this;
}
// Inverse transformation of x and y. It works slow because
// it explicitly inverts the matrix on every call. For massive
// operations it's better to Invert() the matrix and then use
// direct transformations.
public void InverseTransform(ref double x, ref double y)
{
Perspective t = new Perspective(this);
if(t.Invert()) t.Transform(ref x, ref y);
}