surfacesofSG

by Tim C. Lueth, SG-Lib Toolbox: SolidGeometry 5.6 - Surfaces
Introduced first in SolidGeometry 4.0, Creation date: 2017-07-06, Last change: 2025-09-14

returns all feature surfaces (open boundaries) that have a limited angle between their normal vectors

Description

This function can take several seconds to classify all OPEN surfaces of a solid by using TR3neighborsAngle and neighborsAngleSurface.
When called without output parameter; drawing the surfaces take the most time.
SGsurfaces returns CLOSED surfaces
TR3mountingfaces is a very similar function


See Also: FSofSG , neighborsAngleSurface , TR3neighborsAngle , SGsurfaces , TR3mountingfaces

Example Illustration

missing image of surfacesofSG(TR,alpha)

Syntax

[FIL,k,FNL,NAL,NBL,Ai]=surfacesofSG(TR,[alpha])

Input Parameter

TR: Solid Geometry or Triangulation
alpha: maximum angle between two facets; default is 1 ~ 60 degree

Output Parameter

FIL: Index List for the Surface Indices
k: maximum value of FIL
FNL: Facet Normal List - TR3neighborsAngle
NAL: Neigbor Angle List - TR3neighborsAngle
NBL: Neigbor List - TR3neighborsAngle
Ai: Area of the indexed surfaces 1:k

Examples


load JACO_robot.mat
surfacesofSG(JC3);



Copyright 2017-2025 Tim C. Lueth. All rights reserved. The code is the property of Tim C. Lueth and may not be redistributed or modified without explicit written permission. This software may be used free of charge for academic research and teaching purposes only. Commercial use, redistribution, modification, or reverse engineering is strictly prohibited. Access to source code is restricted and granted only under specific agreements. For licensing inquiries or commercial use, please contact: Tim C. Lueth

Last html export of this page out of FM database by TL: 2025-09-21