+
+module Machine_Arm(){
+ ysz = cutout_l_end_y_total;
+ // assume the round end is arc of a circle
+ chordlen = dist2d([0,0], [ cutout_l_end_y, cutout_l_end_curve ]);
+ endrad = cutout_l_end_y / cutout_l_end_curve * chordlen;
+
+ translate([0,0,-30]) linear_extrude(height=60) {
+ translate(tile01_tr + [0, (-cutout_tile01_y + cutout_tile11_y)/2]) {
+ intersection(){
+ translate([-100, -ysz/2])
+ square([400, ysz]);
+ translate([ endrad - cutout_tile11_x - cutout_l_end_x_slop, 0 ])
+ circle(r=endrad, $fa=0.01,$fd=5);
+ }
+ }
+ }
+}
+
+module Machine_Profile(){
+ first_rear = machine_rear_profile[0];
+ first_front = machine_front_profile[len(machine_front_profile)-1];
+ below_point = 0.5 * ( first_rear + first_front ) + [ 0, -10 ];
+ pol = concat( machine_rear_profile,
+ [ below_point ],
+ machine_front_profile);
+ skew_angle = atan2( first_front[1] - first_rear[1],
+ first_front[0] - first_rear[0] );
+ echo(below_point, pol, skew_angle);
+ hull(){
+ for (z=[0,-40]) {
+ translate([0,z]) {
+ //scale([1,5])
+ rotate([0,0, -skew_angle ]){
+ //translate( - first_front )
+ polygon(pol);
+ }
+ }
+ }
+ }
+}
+
+module Machine_RearProfile(){
+ intersection(){
+ Machine_Profile();
+ translate([ -200 + machine_rear_to_front/2, -100 ]) {
+ square([200,200]);
+ }
+ }
+}
+
+module Machine_Rear(){ ////toplevel
+ big_rad = rearcurve_total_len - rearcurve_strt_len + rearcurve_rad;
+ small_rad = rearcurve_rad + rearcurve_rad_slop;
+ translate([ tile01_tr[0] - cutout_l_end_x + rearedge_len,
+ cutout_tile11_y,
+ 0 ]){
+ //%cube([20,20,20]);
+ translate([ -reartablet_x,
+ -1,
+ -reartablet_z])
+ mirror([0,0,1])
+ cube([ reartablet_x+1,
+ reartablet_y+1,
+ 20 ]);
+ }
+ translate([ tile01_tr[0] - cutout_l_end_x + rearedge_len,
+ cutout_tile11_y,
+ 0 ]){
+ translate([ rearcurve_strt_len,
+ 0,
+ 0 ]){
+ translate([ 1,
+ 0,
+ 0
+ ]){
+ rotate([0,-90,0])rotate([0,0,-90]){
+ linear_extrude(height= rearcurve_strt_len + 1)
+ Machine_RearProfile();
+ }
+ }
+ translate([ 0,
+ 0,
+ rearcurve_double_inrad ]) {
+ intersection(){
+ rotate([90,0,0]){
+ rotate_extrude(convexity=10, $fn=32) {
+ rotate([0,0,90]) translate([ 0,
+ -rearcurve_double_inrad ]) {
+ Machine_RearProfile();
+ }
+ }
+ }
+ mirror([0,0,1])
+ translate([0,-75,0]) cube([150,150,150]);
+ }
+ }
+ }
+ }
+}
+
+module Machine(){ ////toplevel
+ Machine_Arm();
+ Machine_Rear();
+}
+
+function Rectangle_corners(c0, sz) =
+ // returns the corners of a rectangle from c0 to c0+sz
+ // if sz is positive, the corners are anticlockwise starting with c0
+ [ c0 + [ 0, 0 ],
+ c0 + [ sz[0], 0 ],
+ c0 + [ sz[0], sz[1] ],
+ c0 + [ 0, sz[1] ] ];
+
+function Rectangle_corners2posts(c) =
+ [ c[0] + thehd_tr,
+ c[1] + thehd_tl,
+ c[2] + thehd_bl,
+ c[3] + thehd_br ];
+
+module Rectangle_TileBase(c) { TileBase(c[0], c[2]); }
+
+function Posts_interpolate_one(c0,c1) = [c0, (c0+c1)/2, c1];
+
+m4_dnl R_EDGE(c,ix)
+m4_dnl c is from Rectangle_corners and
+m4_dnl ix is a corner number
+m4_dnl expands to two comma-separated corners:
+m4_dnl that denoted by ix, and the next one anticlockwise
+m4_define(`R_EDGE',`$1[$2],$1[(($2)+1)%4]')
+
+module Tile02(){ ////toplevel
+ sz = [100,170];
+ c0 = tile02_tr + -sz;
+ c = Rectangle_corners(c0, sz);
+ posts = Rectangle_corners2posts(c);
+ rcs = [R_EDGE(c,0)];
+ difference(){
+ union(){
+ Rectangle_TileBase(c);
+ Posts(posts);
+ RoundEdge(R_EDGE(c,0));
+ RoundEdge(R_EDGE(c,3));
+ InterlockEdge(R_EDGE(c,2), 0);
+ }
+ InterlockEdge(R_EDGE(c,1), 1);
+ RoundCornerCut(rcs);
+ }
+ RoundCornerAdd(rcs);
+}
+
+module Tile12(){ ////toplevel
+ sz = [100,250];
+ c0 = tile02_tr + [-sz[0], 0];
+ c = Rectangle_corners(c0, sz);
+ posts = Rectangle_corners2posts(c);
+ rcs = [R_EDGE(c,3)];
+ difference(){
+ union(){
+ Rectangle_TileBase(c);
+ Posts(posts);
+ RoundEdge(R_EDGE(c,2));
+ RoundEdge(R_EDGE(c,3));
+ }
+ InterlockEdge(R_EDGE(c,0), 1);
+ InterlockEdge(R_EDGE(c,1), 1);
+ RoundCornerCut(rcs);
+ }
+ RoundCornerAdd(rcs);
+}
+
+tile_01_11_cnr = tile01_tr + [-cutout_tile11_x, 0];
+tile_11_10_cnr = tile01_tr + [0, cutout_tile11_y];
+
+module Tile11(){ ////toplevel
+ sz = [250,250];
+ c0 = tile02_tr + [0,0];
+ c = Rectangle_corners(c0, sz);
+ cnr_posts = Rectangle_corners2posts(c);
+ posts = concat(
+ Posts_interpolate_one(cnr_posts[0],
+ cnr_posts[1] - [cutout_tile11_x, 0]),
+ [ cnr_posts[1] + [0, cutout_tile11_y],
+ cnr_posts[2],
+ cnr_posts[3]
+ ]);
+ difference(){
+ union(){
+ Rectangle_TileBase(c);
+ Posts(posts);
+ RoundEdge(R_EDGE(c,2));
+ InterlockEdge(R_EDGE(c,3));
+ }
+ InterlockEdge(c[0], tile_01_11_cnr, 1);
+ InterlockEdge(tile_11_10_cnr, c[2], 1);
+ Machine();
+ }
+}
+
+tile_01_00_cnr = tile01_tr + [0, -cutout_tile01_y];
+
+module Tile01(){ ////toplevel
+ sz = [250,170];
+ c0 = tile02_tr + [0,-sz[1]];
+ c = Rectangle_corners(c0, sz);
+ cnr_posts = Rectangle_corners2posts(c);
+ posts = concat(
+ Posts_interpolate_one(R_EDGE(cnr_posts,0)),
+ [ cnr_posts[2] + [0, -cutout_tile01_y] ],
+ Posts_interpolate_one(cnr_posts[2] - [cutout_tile11_x, 0],
+ cnr_posts[3])
+ );
+ difference(){
+ union(){
+ Rectangle_TileBase(c);
+ Posts(posts);
+ RoundEdge(R_EDGE(c,0));
+ InterlockEdge(tile_01_11_cnr, c[3]);
+ InterlockEdge(R_EDGE(c,3));
+ }
+ InterlockEdge(c[1], tile_01_00_cnr, 1);
+ Machine();
+ }
+}
+
+module Tile10(){ ////toplevel
+ sz = [250,250];
+ c0 = tile02_tr + [sz[0],0];
+ c = Rectangle_corners(c0, sz);
+ cnr_posts = Rectangle_corners2posts(c);
+ cty = cutout_tile11_y;
+ rcy = cty + rearcurve_avoid_y;
+ posts = [ cnr_posts[0] + [ 0, cty ],
+ cnr_posts[1] + [ -sz[1] + rearedge_len - cutout_l_end_x, cty ],
+ cnr_posts[1] + [ 0, rcy ],
+ cnr_posts[2],
+ cnr_posts[3] ];
+ rcs = [R_EDGE(c,2)];
+ difference(){
+ union(){
+ Rectangle_TileBase(c);
+ Posts(posts);
+ RoundEdge(R_EDGE(c,1));
+ RoundEdge(R_EDGE(c,2));
+ InterlockEdge(c[3], tile_11_10_cnr);
+ }
+ RoundCornerCut(rcs);
+ Machine();
+ }
+ RoundCornerAdd(rcs);
+}
+
+module Demo(){ ////toplevel
+ translate(demo_slop*[-2,1]) color("blue") Tile12();
+ translate(demo_slop*[-2,0]) color("red") Tile02();
+ translate(demo_slop*[-2,1]) color("orange") Tile11();
+ translate(demo_slop*[-2,0]) color("purple") Tile01();
+ translate(demo_slop*[-3,1]) color("blue") Tile10();
+ %Machine();
+}