Constructs the inverse of a transform.
graphics-ports
invert-transform transform &optional into => inverse
transform⇩ |
A transform object. |
into⇩ |
A transform object or nil . |
inverse |
A transform object. |
The function invert-transform
constructs the inverse of transform. If T is transform and T' is its inverse, then TT' = I. If into is non-nil it is modified to contain T' and returned, otherwise a new transform is constructed and returned.
See graphics-state for details of how a transform is used.
CAPI User Guide and Reference Manual (Windows version) - 01 Dec 2021 19:34:15