plstransform: Set a global coordinate transform function

plstransform (coordinate_transform,
 coordinate_transform_data);
 

This function can be used to define a coordinate transformation which affects all elements drawn within the current plot window. The coordinate_transform function is similar to that provided for the plmap and plmeridians functions. The coordinate_transform_data parameter may be used to pass extra data to coordinate_transform.

coordinate_transform (void (*) (PLFLT, PLFLT, PLFLT *, PLFLT *, PLPointer) , input)

Pointer to a function that defines a transformation from the input (x, y) coordinate to a new plot world coordinate. A NULL pointer means that no transform is applied.

coordinate_transform_data (PLPointer, input)

Optional extra data for coordinate_transform.

Redacted form:

This function is used in examples 19 and 22.