Created first model of the string art generator

.gitmodules

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+[submodule "string-art-model/libraries/MCAD"]
+	path = string-art-model/libraries/MCAD
+	url = https://github.com/openscad/MCAD.git
+[submodule "string-art-model/libraries/sprockets"]
+	path = string-art-model/libraries/sprockets
+	url = https://github.com/dallenwilson/OpenSCAD-Sprockets.git

string-art-model/constants/fabricFeeder.scad

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+
+
+fabric_arm_height = 100*mm;
+fabric_arm_width = 20*mm;
+
+fabric_arm_color = "white";
+fabric_arm_gear_color = "silver";
+fabric_arm_axel_radius = 5;
+fabric_arm_top_height = 30;
+arm_dimensions = [fabric_arm_width, fabric_arm_width, fabric_arm_height];
+arm_translation = 0;

string-art-model/constants/motorMount.scad

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+include <units.scad>
+include <nailBoard.scad>
+
+motor_mount_colour = "grey";
+motor_mount_width = 800*mm;
+motor_mount_height = 600*mm;
+motor_mount_thickness = 20*mm;
+
+
+motor_mount_axel_radius = nail_board_axel_radius + 1*mm;
+motor_mount_axel_offset_x = motor_mount_width*0.3;
+motor_mount_axel_offset_y = motor_mount_height*0.3;
+
+motor_mount_fabric_pole_radius = 4*mm;
+motor_mount_fabric_pole_height = 30*mm;
+motor_mount_fabric_pole_offset_x = -motor_mount_width*0.3;
+motor_mount_fabric_pole_offset_y = -motor_mount_height*0.3;

string-art-model/constants/nailBoard.scad

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+include <units.scad>
+
+// Nail board parameters
+number_of_nails = 100*mm;
+nail_board_radius = 300*mm; 
+nail_board_thickness = 20*mm; 
+nail_board_nail_indent = 3*mm; 
+nail_board_axel_radius = 3*mm; 
+nail_board_colour = "white";
+
+// Nail parameters
+nail_height = 10*mm; 
+nail_radius = 3*mm;
+nail_head_radius = 4*mm;
+nail_head_height = 2*mm;
+nail_colour = "silver";

string-art-model/constants/units.scad

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+mm = 1;
+cm = 10 * mm;
+m = 1000 * mm;
+inch = 25.4 * mm;
+ft = 12 * inch;
+yd = 3 * ft;
+mile = 1760 * yd;
+deg = 1;
+rad = 180 / PI * deg;

string-art-model/libraries/MCAD/.gitignore

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+*~
+*.pyc
+.pytest_cache/
+__pycache__/

string-art-model/libraries/MCAD/2Dshapes.scad

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+/*
+ *  OpenSCAD 2D Shapes Library (www.openscad.org)
+ *  Copyright (C) 2012 Peter Uithoven
+ *
+ *  License: LGPL 2.1 or later
+
+ *  2D Shapes
+ *  ngon(sides, radius, center=false);
+ *  complexRoundSquare(size,rads1=[0,0], rads2=[0,0], rads3=[0,0], rads4=[0,0], center=true)
+ *  roundedSquare(pos=[10,10],r=2)
+ *  ellipsePart(width,height,numQuarters)
+ *  donutSlice(innerSize,outerSize, start_angle, end_angle)
+ *  pieSlice(size, start_angle, end_angle) //size in radius(es)
+ *  ellipse(width, height) {
+*/
+
+// Examples - (layouts.scad is required for examples)
+// example2DShapes(); use <layouts.scad>;
+
+module example2DShapes() {
+    grid(105,105,true,4)
+    {
+        // ellipse
+        ellipse(50,75);
+
+        // part of ellipse (a number of quarters)
+        ellipsePart(50,75,3);
+        ellipsePart(50,75,2);
+        ellipsePart(50,75,1);
+
+        // complexRoundSquare examples
+        complexRoundSquare([75,100],[20,10],[20,10],[20,10],[20,10]);
+        complexRoundSquare([75,100],[0,0],[0,0],[30,50],[20,10]);
+        complexRoundSquare([50,50],[10,20],[10,20],[10,20],[10,20],false);
+        complexRoundSquare([100,100]);
+        complexRoundSquare([100,100],rads1=[20,20],rads3=[20,20]);
+
+        // pie slice
+        pieSlice(50,0,10);
+        pieSlice(50,45,190);
+        pieSlice([50,20],180,270);
+
+        // donut slice
+        donutSlice(20,50,0,350);
+        donutSlice(30,50,190,270);
+        donutSlice([40,22],[50,30],180,270);
+        donutSlice([50,20],50,180,270);
+        donutSlice([20,30],[50,40],0,270);
+    }
+}
+// end examples ----------------------
+
+module complexRoundSquare(
+    size, // Size
+    rads1=[0,0], // Top left radius
+    rads2=[0,0], // Top right radius
+    rads3=[0,0], // Bottom right radius
+    rads4=[0,0], // Bottom left radius
+    center=true // center
+) {
+    width = size[0];
+    height = size[1];
+    // %square(size=[width, height],center=true);
+    x1 = 0-width/2+rads1[0];
+    y1 = 0-height/2+rads1[1];
+    x2 = width/2-rads2[0];
+    y2 = 0-height/2+rads2[1];
+    x3 = width/2-rads3[0];
+    y3 = height/2-rads3[1];
+    x4 = 0-width/2+rads4[0];
+    y4 = height/2-rads4[1];
+
+    scs = 0.1; // straight corner size
+
+    x = (center)? 0: width/2;
+    y = (center)? 0: height/2;
+
+    translate([x,y,0])
+    hull()
+    {
+        // top left
+        if(rads1[0] > 0 && rads1[1] > 0)
+            translate([x1,y1])
+            mirror([1,0])
+            ellipsePart(rads1[0]*2,rads1[1]*2,1);
+        else
+            translate([x1,y1])
+            square(size=[scs, scs]);
+
+        // top right
+        if(rads2[0] > 0 && rads2[1] > 0)
+            translate([x2,y2])
+            ellipsePart(rads2[0]*2,rads2[1]*2,1);
+        else
+            translate([width/2-scs,0-height/2])
+            square(size=[scs, scs]);
+
+        // bottom right
+        if(rads3[0] > 0 && rads3[1] > 0)
+            translate([x3,y3])
+            mirror([0,1])
+            ellipsePart(rads3[0]*2,rads3[1]*2,1);
+        else
+            translate([width/2-scs,height/2-scs])
+            square(size=[scs, scs]);
+
+        // bottom left
+        if(rads4[0] > 0 && rads4[1] > 0)
+            translate([x4,y4])
+            rotate([0,0,-180])
+            ellipsePart(rads4[0]*2,rads4[1]*2,1);
+        else
+            #translate([x4,height/2-scs])
+            square(size=[scs, scs]);
+    }
+}
+
+module roundedSquare(pos=[10,10],r=2) {
+    minkowski()
+    {
+        square([pos[0]-r*2,pos[1]-r*2],center=true);
+
+
+        circle(r=r);
+    }
+}
+
+// round shapes
+// The orientation might change with the implementation of circle...
+module ngon(sides, radius, center=false) {
+    rotate([0, 0, 360/sides/2])
+    circle(r=radius, $fn=sides, center=center);
+}
+
+module ellipsePart(width,height,numQuarters) {
+    o = 1; //slight overlap to fix a bug
+    difference()
+    {
+        ellipse(width,height);
+
+        if(numQuarters <= 3)
+            translate([0-width/2-o,0-height/2-o,0])
+            square([width/2+o,height/2+o]);
+        if(numQuarters <= 2)
+            translate([0-width/2-o,-o,0])
+            square([width/2+o,height/2+o*2]);
+        if(numQuarters < 2)
+            translate([-o,0,0])
+            square([width/2+o*2,height/2+o]);
+    }
+}
+
+module donutSlice(innerSize,outerSize, start_angle, end_angle) {
+    difference()
+    {
+        pieSlice(outerSize, start_angle, end_angle);
+
+        if(is_list(innerSize) && len(innerSize) > 1)
+             ellipse(innerSize[0]*2,innerSize[1]*2);
+        else
+            circle(innerSize);
+    }
+}
+
+module pieSlice(size, start_angle, end_angle) { //size in radius(es)
+    rx = (is_list(size) && len(size) > 1)? size[0] : size;
+    ry = (is_list(size) && len(size) > 1)? size[1] : size;
+    trx = rx* sqrt(2) + 1;
+    try = ry* sqrt(2) + 1;
+    a0 = (4 * start_angle + 0 * end_angle) / 4;
+    a1 = (3 * start_angle + 1 * end_angle) / 4;
+    a2 = (2 * start_angle + 2 * end_angle) / 4;
+    a3 = (1 * start_angle + 3 * end_angle) / 4;
+    a4 = (0 * start_angle + 4 * end_angle) / 4;
+
+    if(end_angle > start_angle)
+        intersection() {
+        if(is_list(size) && len(size) > 1)
+            ellipse(rx*2,ry*2);
+        else
+            circle(rx);
+        polygon([
+            [0,0],
+            [trx * cos(a0), try * sin(a0)],
+            [trx * cos(a1), try * sin(a1)],
+            [trx * cos(a2), try * sin(a2)],
+            [trx * cos(a3), try * sin(a3)],
+            [trx * cos(a4), try * sin(a4)],
+            [0,0]
+        ]);
+    }
+}
+
+module ellipse(width, height) {
+    scale([1, height/width, 1])
+    circle(r=width/2);
+}