Macro

Summary

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

Signature

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

Arguments

points

A list of real numbers

port

A graphics port

Values

result

The return value of the last form executed in body

Description

The with-transformed-points macro 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 body . The points symbol must be bound to a list of alternating x and y values representing coordinate points in the port .