Function

Summary

Transforms a distance by the rotation and scale of the inverse of a given transform.

Package

graphics-ports

Signature

untransform-distance transform dx dy => x , y

Arguments

transform

A transform.

dx

A real number.

dy

A real number.

Values

x

A real number.

y

A real number.

Description

The function untransform-distance transforms the distance ( dx dy ) by the rotation and scale of the effective inverse of transform . The translation in the inverse transform is ignored. The transformed distance ( dx dy ) is returned as two values.

Notes

See graphics-state for details of how a transform is used.

See also

graphics-state
transform