round_edge_rad = 2.0;
+round_cnr_rad = 10;
+
interlock_dia = 10;
+interlock_fine = 0.66;
+
+interlock_fine_slope = 1.0;
+interlock_fine_lenslop = 1.0;
+
+demo_slop = 0.1;
// calculated
interlock_rad = interlock_dia/2;
interlock_negative_rad = interlock_rad + 0.125;
+interlock_sq_adj = 0.2; // arbitrary
+
module Post(){
mirror([0,0,1]) {
difference(){
}
}
-module InterlockLobePlan(r, ymir) {
+module RoundCornerCut(this_cnr, right_cnr) {
+ offr= round_cnr_rad - round_edge_rad;
+ INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE {
+ difference(){
+ cube(offr*2 - 0.1, center=true);
+ translate([offr, offr, 0])
+ cylinder(center=true, h=20, r= offr);
+ }
+ }
+}
+
+module RoundCornerAdd(this_cnr, right_cnr) {
+ bigr = round_cnr_rad - round_edge_rad;
+ INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE {
+ intersection(){
+ cube(bigr*2 + 0.1, center=true);
+ translate([bigr, bigr, 0])
+ rotate_extrude(convexity=10, $fn=50)
+ translate([bigr, 0])
+ difference(){
+ circle(r= round_edge_rad, $fn=50);
+ mirror([1,1])
+ square([20,20]);
+ }
+ }
+ }
+}
+
+module InterlockLobePlan(negative) {
+ r = negative ? interlock_negative_rad : interlock_rad;
+ ymir = negative ? 0 : 1;
+
dx = sqrt(3) * r;
$fn= 80;
translate([thehd[0], 0]){
- mirror([0,ymir,0]){
+ mirror([0,ymir]){
circle(r=r);
difference(){
translate([-dx, -0.1])
}
}
-module InterlockLobeCore(r, plusth, ymir) {
- translate([0, 0, plusth]){
- mirror([0,0,1]){
- linear_extrude(height=tile_th+plusth*2, convexity=10){
- InterlockLobePlan(r, ymir);
- }
+module InterlockEdgePlan(negative, nlobes, length, dosquare=true) {
+ for (lobei = [ 0 : nlobes-1 ]) {
+ lobex = (length - thehd[0]*2) * (lobei ? lobei / (nlobes-1) : 0);
+ translate([lobex, 0, 0]) {
+ InterlockLobePlan(negative);
}
}
+
+ if (dosquare) {
+ iadj = 0;
+ slotshorter = negative ? -0.1 : interlock_fine_lenslop;
+ mirror([0, negative])
+ translate([slotshorter, iadj])
+ square([length - slotshorter*2, interlock_fine + iadj*2]);
+ }
}
-module InterlockLobe(this_cnr, right_cnr, negative=0) {
- INREFFRAME(this_cnr, right_cnr)
- InterlockLobeCore(negative ? interlock_negative_rad : interlock_rad,
- negative ? 1 : 0,
- negative ? 0 : 1);
+module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) {
+ plusth = negative * 1.0;
+ protr = interlock_fine + interlock_sq_adj;
+
+ z2 = -tile_th/2;
+ z1 = -tile_th/2 - protr / interlock_fine_slope;
+ z3 = -tile_th/2 + protr / interlock_fine_slope;
+
+ negsign = negative ? -1 : +1;
+ yprotr = negsign * protr;
+
+ INREFFRAME(left_cnr, right_cnr) {
+ for (vsect = [ // zs0 zs1 ys0, ys1
+ [ -tile_th-plusth, plusth, 0, 0],
+ [ z1, z2, 0, yprotr],
+ [ z2, z3, yprotr, 0],
+ ]) {
+ zs0 = vsect[0];
+ zs1 = vsect[1];
+ zsd = zs1-zs0;
+ ys0 = vsect[2];
+ ys1 = vsect[3];
+ ysd = ys1-ys0;
+ sl = ysd/zsd;
+ m = [ [ 1,0, 0, 0 ],
+ [ 0,1, -sl, -ys0 + negsign*interlock_sq_adj ],
+ [ 0,0, 1, zs0 ],
+ [ 0,0, 0, 1 ] ];
+ multmatrix(m)
+ linear_extrude(height=zsd, convexity=10)
+ InterlockEdgePlan(negative, nlobes, length, !!ysd);
+ }
+ }
}
function TestPiece_holes2corners(holes) =
];
corners = TestPiece_holes2corners(holes);
difference(){
- TileBase(corners[0], corners[2]);
- InterlockLobe(corners[1], corners[2], 1);
+ union(){
+ TileBase(corners[0], corners[2]);
+ Posts(holes);
+ RoundEdge(corners[0], corners[1]);
+ RoundEdge(corners[3], corners[0]);
+ }
+ InterlockEdge(corners[1], corners[2], 1, nlobes=1);
+ RoundCornerCut(corners[0], corners[1]);
}
- Posts(holes);
- RoundEdge(corners[0], corners[1]);
- RoundEdge(corners[3], corners[0]);
- RoundLeftCorner(corners[0], corners[1]);
+ RoundCornerAdd(corners[0], corners[1]);
}
module TestPiece2(){ ////toplevel
TileBase(corners[0], corners[2]);
Posts(holes);
RoundEdge(corners[0], corners[1]);
- InterlockLobe(corners[3], corners[0]);
+ InterlockEdge(corners[3], corners[0], 0, nlobes=1);
}
module TestDemo(){ ////toplevel
translate([ -thehd[0], 0 ])
color("blue")
TestPiece1();
- translate([ +thehd[0], 0 ])
+ translate([ +thehd[0] + demo_slop, 0 ])
TestPiece2();
}
c = Rectangle_corners(c0, sz);
posts = Rectangle_corners2posts(c);
difference(){
- TileBase(c[0], c[2]);
+ union(){
+ TileBase(c[0], c[2]);
+ Posts(posts);
+ RoundEdge(c[0], c[1]);
+ RoundEdge(c[3], c[0]);
+ InterlockEdge(c[2], c[3], 0);
+ }
+ InterlockEdge(c[1], c[2], 1);
+ RoundCornerCut(c[0], c[1]);
}
- Posts(posts);
- RoundEdge(c[0], c[1]);
- RoundEdge(c[3], c[0]);
- RoundLeftCorner(c[0], c[1]);
+ RoundCornerAdd(c[0], c[1]);
}
module Tile12(){ ////toplevel
c = Rectangle_corners(c0, sz);
posts = Rectangle_corners2posts(c);
difference(){
- TileBase(c[0], c[2]);
+ union(){
+ TileBase(c[0], c[2]);
+ RoundEdge(c[2], c[3]);
+ RoundEdge(c[3], c[0]);
+ RoundLeftCorner(c[2], c[3]);
+ Posts(posts);
+ }
+ InterlockEdge(c[0], c[1], 1);
}
- Posts(posts);
- RoundEdge(c[2], c[3]);
- RoundEdge(c[3], c[0]);
- RoundLeftCorner(c[2], c[3]);
}
module Demo(){ ////toplevel
- color("blue") Tile12();
- color("red") Tile02();
+ translate(demo_slop*[-2,1]) color("blue") Tile12();
+ translate(demo_slop*[-2,0]) color("red") Tile02();
}
//TestPiece1();