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.TH "al_invert_transform" "3" "" "Allegro reference manual"
.SH NAME
al_invert_transform \- Allegro 5 API
.SH SYNOPSIS
.IP
.EX
#include \f[B]<allegro5/allegro.h>\f[R]

void al_invert_transform(ALLEGRO_TRANSFORM *trans)
.EE
.SH DESCRIPTION
Inverts the passed transformation.
If the transformation is nearly singular (close to not having an
inverse) then the returned transformation may be invalid.
Use al_check_inverse(3) to ascertain if the transformation has an
inverse before inverting it if you are in doubt.
.PP
\f[I]Parameters:\f[R]
.IP \[bu] 2
trans \- Transformation to invert
.RS
.PP
\f[I]Note\f[R]: Allegro\[cq]s transformation inversion functions work
correctly only with 2D transformations.
.RE
.SH SEE ALSO
al_check_inverse(3)