with-transformed-points Macro

Summary

Binds a list of transformed points in a port to a list across the execution of the macro's body.

Package

graphics-ports

Signature

with-transformed-points (points port) &body body => result

Arguments

Values

Description

The macro with-transformed-points binds points to a new list of x and y values obtained by post-multiplying them by the current transform of port, and then evaluates the forms in body as am implicit progn. points must be bound to a list of alternating x and y values representing coordinate points in port.