CPLpinholesinCPL

by Tim C. Lueth, SG-Lib Toolbox: SolidGeometry 5.6 - CPL/Closed Polygon Lists
Introduced first in SolidGeometry 4.7, Creation date: 2019-07-06, Last change: 2025-09-14

returns the CPLs of the pins that would fit into bore holes of servos or PCB

Description

.. on the flight JHU, Baltimore..
support real holes or structures at the outer

See Also: CPLofSGboreholes , CPLofSGhull

Example Illustration

missing image of CPLpinholesinCPL(CPL,rmin,bord)

Syntax

CPLH=CPLpinholesinCPL(CPL,[rmin,bord])

Input Parameter

CPL: CPL created by CPLofSGboreholes
rmin: minimal radius to consider; default 2 mm
bord: border of the outer contour that should not be touched by the pins; default 1mm

Output Parameter

CPLH: CPL of pins that fit into the bore holes

Examples


SGcmdsample('3156'); C=ans;
CPLofSGboreholes(C,'',1.5); CPLC=ans; CPLplot(CPLC,'m',4);
CPLpinholesinCPL(CPLC,1);CPLH=ans;
bb=BBofSG(C), SGofCPLz(CPLH,bb([5:6])), SGplotalpha(C,'r',0.2);



Copyright 2019-2025 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

Algorithm (Workflow)

This function, CPLpinholesinCPL, is designed to determine the CPLs (Closed Polygonal Lines) of pins that can fit into bore holes of servos or PCBs. It is part of the SolidGeometry library.

Input Parameters

Output

Algorithm Steps

  1. Retrieve the minimal radius rmin and border bord from the input parameters or use default values if not provided.
  2. Calculate Amin, the minimum area for a hole, using the formula: Amin = rmin * rmin * pi * 0.8.
  3. Compute the convex hull of the input CPL and buffer it by -bord to create a new CPL.
  4. Perform a boolean subtraction between the buffered convex hull and the original CPL to get CPLH.
  5. Calculate the area of each component in CPLH and store it in a.
  6. Identify indices ii where the area is greater than or equal to Amin.
  7. If there are valid indices, select the corresponding components from CPLH; otherwise, set CPLH to an empty array.
  8. If no output is requested, plot the original CPL in red and the resulting CPLH in green.
Algorithm explaination created using ChatGPT on 2025-08-19 07:58. (Please note: No guarantee for the correctness of this explanation)

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