From f7c30e539330ece7e671d23f309e5ee5e6505f9f Mon Sep 17 00:00:00 2001
From: Kenneth <40445044+kennetek@users.noreply.github.com>
Date: Sat, 30 Jul 2022 23:13:47 -0700
Subject: [PATCH] Added script

---
 gridfinity-rebuilt.scad | 315 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 315 insertions(+)
 create mode 100644 gridfinity-rebuilt.scad

diff --git a/gridfinity-rebuilt.scad b/gridfinity-rebuilt.scad
new file mode 100644
index 0000000..f61ea7f
--- /dev/null
+++ b/gridfinity-rebuilt.scad
@@ -0,0 +1,315 @@
+$fa = 5;
+$fs = 0.25;
+
+
+// ===== Parameters =====
+
+gridx = 2;      // number of bases along x-axis
+gridy = 2;      // number of bases along y-axis
+gridz = 3;      // unit height along z-axis (2, 3, or 6, but can be anything)
+n_div = 2;      // number of compartments (ideally, coprime w/ gridx)
+                // set n_div to 0 for a solid bin (for custom bins)
+
+length = 42;    // base unit (if you want to go rogue ig)
+
+// type of tab style. alignment only matters if tabs are large enough
+// 0:full, 1:automatic, 2:right, 3:center, 4:left, 5:none
+style_tab = 0; 
+
+enable_scoop    = true; // the rounded edge that allows for easy removal
+enable_holes    = true; // holes on the base for magnet / screw
+enable_holeslit = true; // extra cut within holes for better slicing
+
+// ===== Info =====
+// the red plane that is the top of the internal bin is d_height+h_base above z=0
+// the tab cutter object causes serious lag in the preview, I think it has something to do with cutting the same surfaces as other cutting objects, but I cannot seem to fix it, apologies
+// the magnet holes have an extra cut in them to make it easier to print without supports
+
+// ===== Dimensions =====
+
+// base
+h_base = 5;     // height of the base
+r_base = 4;     // outside rounded radius of bin
+r_c1 = 0.8;     // lower base chamfer "radius"
+r_c2 = 2.4;     // upper base chamfer "radius"
+h_bot = 2.2;    // bottom thiccness of bin
+
+// base holes
+r_hole1 = 1.5;  // screw hole radius
+r_hole2 = 3.25; // magnet hole radius
+d_hole = 26;    // center-to-center distance between holes
+h_hole = 2.4;   // magnet hole depth
+
+// fillets
+r_f1 = 0.6;     // top edge fillet radius
+r_f2 = 2.8;     // internal fillet radius
+r_f3 = 0.6;     // lip fillet radius
+
+// misc
+d_div = 1.2;    // width of divider between compartments
+d_wall = 0.95;   // minimum wall thickness
+d_clear = 0.25; // tolerance fit factor
+
+// tabs
+d_tabh = 15.85;   // height of tab (yaxis, measured from inner wall)
+d_tabw = length; // maximum width of tab
+a_tab = 32; 
+
+// calculations
+d_height = (gridz-1)*7 + 2;  
+r_scoop = length*gridz/12;  // scoop radius
+d_wall2 = r_base-r_c1-d_clear*sqrt(2);
+
+d_width = (gridx*length-2*d_wall-(n_div-1)*d_div)/n_div; 
+b_notab = style_tab == 5 || gridz < 3; 
+
+// magic numbers (cutter parameters)
+v_tab = [r_f2, r_f3, d_height-h_bot-(d_tabh-d_wall)*tan(a_tab), d_tabh-d_wall-r_f3/tan(a_tab/2), d_height-h_bot-r_f3, 179, a_tab, r_f2];
+v_edg = [r_f2, 0, d_height-h_bot-d_wall2, d_wall2-d_wall, d_height-h_bot-d_wall, 90, 45];
+v_slo = [r_scoop, 0, 2*d_height, 0, 0, 30, 10];
+
+
+
+gridfinity();
+
+
+// ===== Modules =====
+
+module gridfinity() {
+    difference() {
+        // solid bin
+        block_bottom(d_height);
+        
+        // subtraction blocks
+        block_cutter();
+    }
+    block_base();
+    block_wall();
+}
+
+module profile_base() {
+    polygon([
+        [0,0],
+        [0,h_base],
+        [r_base,h_base],
+        [r_base-r_c2,h_base-r_c2],
+        [r_base-r_c2,r_c1],
+        [r_base-r_c2-r_c1,0]
+    ]);
+}
+
+module block_base() {
+    color("orange")
+    pattern_linear(gridx, gridy, length) 
+    render() union() {
+        sweep_rounded(length-2*r_base,length-2*r_base) profile_base();
+        pattern_circular(4) difference() {
+            linear_extrude(h_base) square(length/2-r_base);
+            if (enable_holes)
+            translate([d_hole/2, d_hole/2, 0]) union() {
+                cylinder(h = 3*h_base, r = r_hole1, center=true);
+                cylinder(h = 2*h_hole, r = r_hole2, center=true);
+                if (enable_holeslit) intersection() {
+                    cylinder(h = 2*(h_hole+0.2), r = r_hole2, center=true);
+                    cube([r_hole1*2,r_hole2*3,2*(h_hole+0.4)], center=true);
+                }
+            }
+        }
+    }
+}
+
+module profile_wall_sub() {
+    difference() {
+        polygon([
+            [0,0],
+            [d_wall/2,0],
+            [d_wall/2,d_height-d_wall2-d_wall/2],
+            [d_wall2,d_height-d_wall],
+            [d_wall2,d_height+h_base],
+            [0,d_height+h_base]
+        ]);
+        offset(delta = 0.25) 
+        translate([r_base,d_height,0]) 
+        mirror([1,0,0]) 
+        profile_base();
+    }
+}
+
+module profile_wall() {
+    translate([r_base,0,0])
+    mirror([1,0,0])
+    difference() {
+        profile_wall_sub();
+        difference() {
+            translate([0, d_height+h_base-d_clear*sqrt(2), 0]) 
+            circle(r_base/2);
+            offset(r = r_f1) 
+            offset(delta = -r_f1)
+            profile_wall_sub();
+        }
+    }
+}
+
+module block_wall() {
+    color("royalblue")
+    translate([0,0,h_base]) 
+    sweep_rounded(gridx*length-2*r_base, gridy*length-2*r_base)
+    profile_wall();
+}
+
+module block_bottom( h = 2.2 ) {
+    color("firebrick")
+    translate([0,0,h_base])
+    hull()
+    sweep_rounded(gridx*length-2*r_base, gridy*length-2*r_base)
+    translate([r_base-0.1,0,0])
+    mirror([1,0,0])
+    square([d_wall, d_height]);
+}
+
+module profile_cutter(r = 0, width = 1, stretch = 0) {
+    extent = width/2-r_f2+0.1;
+    translate([r-r_f2,0,0]) 
+    union() {
+        difference() {
+            union() {
+                translate([0,extent,0]) circle(r=r_f2);
+                square([r_f2,extent]);
+            }
+            translate([-r_f2,0,0]) square([r_f2,extent+r_f2]);
+        }
+        mirror([1,0,0]) square([stretch,extent+r_f2]);
+    }
+}
+
+module part_bend(t=[0,0], rot, ang, rad, width, s = 0) {
+    translate([t.x,t.y,0]) 
+    rotate([0,0,rot]) 
+    rotate_extrude(angle = ang, convexity = 4) 
+    profile_cutter(rad,width,s);
+}
+
+module part_line(t=[0,0], rot, d, width, s = 0) {
+    translate([t.x,t.y,0])
+    rotate([90,0,rot])
+    translate([r_f2,0,0])
+    linear_extrude(d) 
+    profile_cutter(0,width,s);
+}
+
+module cutter_main(arr, width, offset = 0) {
+    
+    r1 = arr[0]; 
+    r2 = arr[1];
+    a_end = arr[5];
+    a_slo = arr[6];
+    p_y3 = arr[2] - r1*tan((90-a_slo)/2);
+    p_x4 = arr[3];
+    p_y4 = arr[4];
+    
+    d_width = width;
+    d_extent = gridy*length/2 - d_wall + 0.1;
+    
+    l_angle = ([p_x4-r1,p_y4-p_y3] * [[cos(a_slo), -sin(a_slo)], [sin(a_slo), cos(a_slo)]])[0];
+    
+    translate([0,gridy*length/2-d_wall,h_base+h_bot])
+    rotate([90,0,-90])
+    union() 
+    copy_mirror([0,0,1])
+    translate([offset,0,-0.1]) {
+        // outside of hull because of its concave geometry
+        if (p_x4 != 0 || p_y4 != 0) difference() 
+            { 
+            union() {
+                render() part_bend([p_x4, p_y4], a_slo+90, a_end-a_slo, -r2, d_width, 2*r_f2);
+                part_line([p_x4, p_y4]+(r_f2+r2)*ta(a_end-90)-0.1*ta(a_end), a_end+90, d_extent, d_width, 2*r_f2);
+                part_line([r1, p_y3]+(r1-r_f2)*-ta(-a_slo)+l_angle*ta(a_slo), a_slo+90, l_angle, d_width, 2*r_f2);
+            }
+            copy_mirror([0,1,0]) translate([0,-0.1,-0.1]) cube([d_extent+0.1,r_f2,d_width]);
+        }
+        hull() 
+        {
+            // left bottom, angle, and scoop fillets
+            part_bend([r1, r1], -180, 90, r1, d_width);
+            part_bend([r1, p_y3], 90+a_slo, 90-a_slo, r1, d_width);
+            
+            // bottom, left, right, angle (thin), angle (thicc)
+            part_line([d_extent, r_f2], -90, d_extent - r1, d_width);
+            part_line([r_f2, r1], 180, p_y3 - r1, d_width);
+            part_line([r1, p_y3]+(r1-r_f2)*-ta(-a_slo), a_slo+90, (d_extent-r1+(r1-r_f2)*cos(a_slo))/cos(a_slo), d_width);
+            
+        }
+    }
+}
+
+module cutter_tab(s = 1) {
+    d_divw = (gridx*length-2*d_wall-(n_div-1)*d_div)/n_div; 
+    if ((d_divw > d_tabw && s != 0 && d_divw - d_tabw > 4*r_f2 ) || s == 5) {
+        d_w = (d_divw - (s==5?0:length)) / (s==3?2:1);
+        mirror([s==2?1:0, 0, 0])
+        copy_mirror([s==3?1:0, 0, 0])
+        translate([(d_divw-d_w)/2,0,0])
+        cutter_main(v_edg, d_w);
+    }
+}
+
+module block_cutter() {
+    if (n_div > 0) {
+        pattern_linear(n_div, 1, d_width + d_div) 
+        cutter_main(b_notab ? v_edg : v_tab, d_width);
+        if (!b_notab) {
+            for (i = [1:n_div]) 
+            translate([((i-1)-(n_div-1)/2)*(d_width + d_div),0,0])
+            cutter_tab(style_tab==1?(i==1?4:(i==n_div?2:3)):style_tab);
+        }
+        mirror([0,1,0])
+        for (i = [1:n_div]) 
+        translate(((i-1)-(n_div-1)/2)*(d_width + d_div)*[1,0,0])
+        cutter_main(enable_scoop?v_slo:v_edg, d_width, enable_scoop?d_wall2-d_wall : 0);
+    }
+}
+
+
+// ==== Utilities =====
+
+ta = function (a) [cos(a), sin(a)];
+
+module copy_mirror(vec=[0,1,0]) {
+    children();
+    mirror(vec) children();
+} 
+
+module pattern_linear(x = 1, y = 1, spacing = 0) {
+    translate([-(x-1)*spacing/2,-(y-1)*spacing/2,0])
+    for (i = [1:x])
+    for (j = [1:y])
+    translate([(i-1)*spacing,(j-1)*spacing,0]) 
+    children();
+}
+
+module pattern_circular(n=2) {
+    for (i = [1:n]) 
+    rotate(i*360/n) 
+    children();
+}
+
+module sweep_rounded(w=10, h=10) {
+    union() pattern_circular(2) {
+        copy_mirror([1,0,0]) 
+        translate([w/2,h/2,0])
+        rotate_extrude(angle = 90, convexity = 4) 
+        children();
+        
+        translate([w/2,0,0])
+        rotate([90,0,0])
+        linear_extrude(height = h, center = true)
+        children();
+        
+        rotate([0,0,90])
+        translate([h/2,0,0])
+        rotate([90,0,0])
+        linear_extrude(height = w, center = true)
+        children();
+    }
+}
+