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.TH PLSTRANSFORM 3plplot  "January, 2019" "" "PLplot API"
.SH NAME
\fBplstransform\fP - Set a global coordinate transform function
.SH SYNOPSIS
\fBplstransform\fP(\fIcoordinate_transform\fP, \fIcoordinate_transform_data\fP)
.SH DESCRIPTION

.P
This function can be used to define a coordinate transformation which affects all elements drawn within the current plot window.  The \fIcoordinate_transform\fP callback function is similar to that provided for the \fBplmap\fP(3plplot) and \fBplmeridians\fP(3plplot) functions.  The \fIcoordinate_transform_data\fP parameter may be used to pass extra data to \fIcoordinate_transform\fP.
.P
Redacted form: General: \fBplstransform(coordinate_transform, coordinate_transform_data)\fP

.P
This function is used in examples 19 and 22.
.SH ARGUMENTS
.TP
\fIcoordinate_transform\fP (\fBPLTRANSFORM_callback\fP(3plplot), input)
A callback function that defines the transformation from the input (x, y) world coordinates to new PLplot world coordinates.  If \fIcoordinate_transform\fP is not supplied (e.g., is set to NULL in the C case), then no transform is applied.
.TP
\fIcoordinate_transform_data\fP (\fBPLPointer\fP(3plplot), input)
Optional extra data for \fIcoordinate_transform\fP.

.SH AUTHORS
Many developers (who are credited at http://plplot.org/credits.php)
have contributed to PLplot over its long history.
.SH SEE ALSO
PLplot documentation at http://plplot.org/documentation.php.