rot_point x y z
rot_point "x y z"ROT_POINT(nged)
NAME
rot_point - transform a point by the inverse of the current view rotation
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SYNOPSIS
DESCRIPTION
The rot_point command applies the inverse of the current view rotation matrix to the given point and returns the transformed point as a space-separated triplet.
The input point may be specified as three separate floating-point arguments, or as a single quoted space-separated triplet. The output is a space-separated x y z string of the resulting point coordinates.
Note: the command applies the inverse of the view rotation matrix (not the forward rotation). This transforms a point from view-rotated space back into unrotated model space orientation — effectively "un-rotating" the point by the amount the view has been rotated. This is distinct from model2view, which applies the full model-to-view transform including scale and translation.
EXAMPLES
Example 1. Transform a point using three separate arguments
mged> rot_point 10 0 0
Transforms the point (10, 0, 0) by the inverse of the current view rotation and returns the result as three space-separated values.
Example 2. Transform a point using a quoted triplet
mged> rot_point "10 0 0"
Equivalent to the above — the single quoted string form is accepted for scripting convenience.
Example 3. Use in a scripting context
mged> set rp [rot_point 0 0 100]
Stores the inverse-rotation-transformed version of (0, 0, 100) in the Tcl variable rp for use in subsequent calculations.
AUTHOR
BRL-CAD Team
BUG REPORTS
Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org