CPLgrow
by Tim C. Lueth, SG-Lib Toolbox: SolidGeometry 5.6 - CPL/Closed Polygon Lists
Introduced first in SolidGeometry 2.5.1, Creation date: 2015-09-11, Last change: 2025-09-14
grows a contour line in a distance
Description
Written on SY Bontekoning at Marina Panacea Palma de Mallorca.
2018-04-12 Modified in Dakhlar, Marocco, add parameter "unid" for handling of enclosed contours.
Supports fittings since SG-Lib 5.0.
"norm" - Outer contours grow, inner contours shrink
"outw" - Outer contours grow, inner contours grow also
"hole" - Outer contours grow, inner contours stay unchanged
"fitt" - Outer contours unchanged, inner contours grow
See Also: PLoutercontour
, CPLoutercontour
, PLgrow
, CPLbuffer
, CPLbufferEdges
, CPLofPLgrow
, CPLofPLgrowline
, CPLbuffer
Example Illustration
Syntax
[RPL,ENL,PNL,PDL]=CPLgrow(CPL,w,[edge,unid])
Input Parameter
CPL: | | Closed Polygon line |
w: | | distance for growing |
edge: | | true call CPLgrowEdge; default is false; |
unid: | | "norm", "outw", "hole" , "fitt", for handling growing |
Output Parameter
RPL: | | Recalculated CPL |
ENL: | | Edge normal vector list |
PNL: | | Point normal vector lit |
PDL: | | Point direction vector list |
Examples
CPLgrow(PLcircle(4),-1);
CPLgrow(PLstar(4,20),-1);
CPLgrow(PLstar(10,12),-3,true);
CPLgrow(CPLsample(12),1,false,'norm');
CPLgrow(CPLsample(12),1,false,'outw');
CPLgrow(CPLsample(12),1,false,'hole');
CPLgrow(CPLsample(12),1,false,'fitt');
Copyright 2015-2025 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