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

graphics-ports

untransform-distance `transform` `dx` `dy` => `x`, `y`

transform⇩ |
A transform. |

dx⇩ |
A real number. |

dy⇩ |
A real number. |

x |
A real number. |

y |
A real number. |

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 is returned as two values.

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

*CAPI User Guide and Reference Manual (Macintosh version) - 01 Dec 2021 19:31:44*