thehans

/* L-system OpenSCAD library by Hans Loeblich

Version 2.0
 - Now supports "M" move without draw
 - Also support position save "[" and restore "]"
 - Core functions have been completely rewritten and are about twice as fast using half the memory from before.
 - Rules now take the form of a single string per rule: "X=ABC"
 - Added new examples to demonstrate added features

This library is for creating L-systems, aka Lindenmayer System, 

thehans

$fs=0.2;
$fa=0.2;

headNum = 2;

phillipsDrive(headNum);
//phillipsDemo(headNum);

module phillipsDemo(num) {
  difference() {

thehans

// shear such that point will translate by [p.x,p.y] as z-axis is traversed by p.z units
module shearAlongZ(p) {
  multmatrix([
    [1,0,p.x/p.z,0],
    [0,1,p.y/p.z,0],
    [0,0,1,0]
  ]) children();
}

rotate([0,0,0]) 

thehans

from __future__ import division # allows floating point division from integers
from FreeCAD import Base
import Part
import math

# Run this macro to create a generic project enclosure box
# You can change all the parameters by selecting the object in the tree view and tweaking values in the "Data" tab

# Possible additions/improvements
#   counterbore bridging .4mm

thehans

// Created in 2018 by Ryan A. Colyer.
// This work is released with CC0 into the public domain.
// https://creativecommons.org/publicdomain/zero/1.0/

include <plot_function.scad> // https://www.thingiverse.com/thing:2391851

finger_spacing = 21;
oblong_factor = 1.8;
ripple_sharpness = 0.6; // range [0:1]
grip_width = 20;

thehans

module rotate_about(a, v, p=[0,0,0]) {
     translate(p) rotate(a,v) translate(-p) children();
}

// example usage
rotate_about([0,45,0],p=[5,0,10]) 
  cylinder(r=5,h=10);

thehans

$fs = 2;
$fa = 2;
r_cyl = 10;
h_cyl = 100;

// Take a 2d shape and extrude outward (or inward with r_delta < 0) 
// from a theoretical cylinder of given radius and height (centered).
// Input geometry should fit within the bounds of [-PI*r_cyl, -h/2] and [PI*r_cyl, h/2]
module cylinder_extrude(r_cyl, r_delta, h, eps=0.01) {
  frags = fragments(r_cyl);

thehans

#!/bin/bash

# This script is meant to help with updating old PRs.
# Mainly any OpenSCAD branch which has not been updated since 2022-02-06
# It is intended to be run on a git repo in which a merge has already been started (merging master into the current, old branch),
# and has conflicts which show as "deleted by them:", or "(modified/deleted)".
#
# Due to how git DOES NOT track file moves/renames, in addition to how it determines file "similarity" (by # of exactly matched lines in a file),
# it makes it very difficult to merge master into branches created before 2 significant events in the OpenSCAD repo:
#   1) A large code style reformatting (PR #4095 on 2022-02-06), and

thehans

$fs=0.5; 
$fa=1;

// example usage
fillet_extrude(height=10,r1=3,r2=-3) {
  hull() { 
    translate([-10,0]) circle(5);
    translate([10,0]) circle(5);
  }
  rotate(90) hull() { 

thehans

$fs=0.5;
$fa=1;

// General offset_extrude and fillet_extrude.
// These use minkowski which can be incredibly slow and resource intensive, but should theoretically work on any 2d geometry.
// fillet_extrude is also much slower than offset_extrude, due to significantly more facets needed for rounded edges.

// There are some alternative methods which are much faster,
// ***BUT*** they have the limitation of only working for CONVEX children.
//    chamfer_extrude (basically like offset_extrude): https://gist.github.com/thehans/072005c68e5fcef3394b8c08e37d1c35