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#7831 closed enhancement (fixed)
Make measure center command work on surfaces
| Reported by: | Tom Goddard | Owned by: | Tom Goddard |
|---|---|---|---|
| Priority: | moderate | Milestone: | |
| Component: | Surface | Version: | |
| Keywords: | Cc: | Elaine Meng | |
| Blocked By: | Blocking: | ||
| Notify when closed: | Platform: | all | |
| Project: | ChimeraX |
Description
Have measure center report the area weighted center of surfaces. Currently "measure center" only works on volumes and atoms.
Change History (3)
comment:1 by , 3 years ago
| Resolution: | → fixed |
|---|---|
| Status: | assigned → closed |
follow-up: 2 comment:2 by , 3 years ago
Is the following correct for "measure center" of a surface (copied from "measure inertia" details)? The approach for surfaces is analogous, where atoms are replaced by vertices of the triangulated surface, and the “mass” of each vertex is ⅓ of the area of the attached triangle. This treats the surface as a thin shell.
follow-up: 3 comment:3 by , 3 years ago
Yes, that is correct, although best to say each vertex position is weighted by the sum of 1/3 triangle areas for all attached triangles.
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Done.