PreCompose

Inside Macintosh: OpenDoc Class Reference /: Part 1 - Classes and Methods / ODTransform

PreCompose
The PreCompose method modifies this transform's matrix by premultiplying it with the specified transform's matrix.
ODTransform PreCompose (in ODTransform transform);
transform
A reference to the transform whose matrix is to be premultiplied with this transform's matrix.
return value
A reference to this transform after the precompose operation.

DISCUSSION
Precomposing multiplies this transform's matrix on the left side by the specified transform.
   this ¨ transform  this
The resulting transform has the same effect as applying the two original transforms in sequence: first the other transform, then this one.

OVERRIDING
If you subclass ODTransform to create a nonlinear transform class, you must override this method. Your override method can call its inherited method at any point in your implementation (it does not matter where).