2 GP Reference Entries

with-transformed-point

Macro

Summary
: Binds a point transformed by a given ports transform to two variables across the body of the macro.
Signature

with-transformed-point (new-x new-y port x y) &body body
                       => result

Arguments

new-x: A variable
new-y: A variable
port: A graphics port
x: A real number
y: A real number
body: A body of Lisp code

Values

result: The return value of the last form executed in body

Description

Thewith-transformed-point macro transforms the point given by (x y) using the port's transform and the resulting values are bound to the new-x and new-y variables. The body of the macro is then evaluated with this binding.