Macro

Summary

Transforms the coordinates of a rectangle and binds them to four variables for the duration of the macro's body.

Signature

with-transformed-rect (nx1
 ny1
 nx2
 ny2
 port
 x1
 y1
 x2
 y2
)

                      &body body
 => result

Arguments

nx1

A variable

ny1

A variable

nx2

A variable

ny2

A variable

port

A graphics port

x1

A real number

y1

A real number

x2

A real number

y2

A real number

body

A body of Lisp code

Values

result

The return value of the last form executed in body

Description

During the evaluation of the with-transformed-rect macro body , the two points ( x1, y1 ) and ( x2, y2 ) are transformed by the port's current transform and the resulting values bound to the variables named by the nx1 ny1 nx2 ny2 args.