intersectstriangle
by Tim C. Lueth, SG-Lib Toolbox: SolidGeometry 5.6 - Analytical Geometry
Introduced first in SolidGeometry 1.0, Creation date: 2012-07-13, Last change: 2025-09-14
fundamental fnct for the intersection between a ray and a triangle
Use carefully: The 'intersectstriangle' function has not yet been extensively tested
Description
References see: http://www.lighthouse3d.com/tutorials/maths
MAJOR CHANGE IN SG-LIB 4.7 because of a clear missing intersection. Threshold is now applied to all decisions
See Also: crossingfacets2VLFL
, cross2F
, VLprojection
, crosspointVLFL
, crosspointsVLFLofT
, crosspointVLFL2
Example Illustration
Syntax
[b,t]=intersectstriangle(p,d,v0,v1,v2)
Input Parameter
p: | | Point of line |
d: | | Direction of line |
v0: | | Vertex 0 |
v1: | | Vertex 1 |
v2: | | Vertex 2 |
Output Parameter
b: | | if t>0 and intersecting point exists |
t: | | intersecting point is p+t*d |
Examples
[a,b]=intersectstriangle([5 5 -10],[0 0 1],[0 0 0],[10 0 0],[10 10 0])
Copyright 2012-2025 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