-module Interlock(this_post, right_post) {
- INREFFRAME(this_post, right_post)
- InterlockCore(interlock_rad, 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);
+ }
+ }