scale sf
sca sfSCALE(nged)
NAME
scale - scale the current view by a uniform factor
On this page
SYNOPSIS
DESCRIPTION
The scale command (also available as sca) multiplies the current view scale by the given scale factor sf. A value greater than 1 zooms out (makes objects appear smaller); a value less than 1 zooms in (makes objects appear larger).
The scale factor must be a positive, finite number. Zero, negative, and infinite values are silently ignored. The resulting view scale is clamped at a minimum value (BV_MINVIEWSIZE) to prevent the view from collapsing to zero.
This command scales the view only — it does not modify any geometry in the database. To scale a primitive’s attributes directly, use pscale.
Only a single (uniform) scale factor is accepted. Providing three separate XYZ scale factors returns an error: "Can not scale xyz independently on a view." Per-axis independent scaling is only available in MGED object-edit mode via the sca Tcl binding.
EXAMPLES
Example 1. Zoom in by a factor of 2
mged> scale 0.5
Halves the view scale, making objects appear twice as large (zooming in).
Example 2. Zoom out by a factor of 4
mged> sca 4
Multiplies the view scale by 4, making objects appear four times smaller (zooming out). Uses the short sca alias.
Example 3. Restore a zoom after inspecting detail
mged> set s [view size] mged> scale 0.1 mged> view size $s
Saves the current view size, zooms in to 10% of original scale for detail inspection, then restores the original view size.
AUTHOR
BRL-CAD Team
BUG REPORTS
Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org