X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=sewing-table.scad.m4;h=5a6aec036ea8e4c6841387de5f815e4e600e37e6;hp=630d48911b8a2f393c6bf5d848fdbc40d85ec53e;hb=d966533a620dcfd35e9aebd199212fcbba6ba83c;hpb=173a156f03a3d5dfccf04f354a07d2e14f661412

diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4
index 630d489..5a6aec0 100644
--- a/sewing-table.scad.m4
+++ b/sewing-table.scad.m4
@@ -150,7 +150,7 @@ module InterlockLobePlan(negative) {
   }
 }
 
-module InterlockEdgePlan(negative, nlobes, length) {
+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]) {
@@ -158,11 +158,13 @@ module InterlockEdgePlan(negative, nlobes, length) {
     }
   }
 
-  iadj = interlock_sq_adj;
-  slotshorter = negative ? 0 : interlock_fine_lenslop;
-  mirror([0, negative])
-    translate([slotshorter, iadj])
-    square([length - slotshorter*2, interlock_fine + iadj*2]);
+  if (dosquare) {
+    iadj = 0;
+    slotshorter = negative ? 0 : interlock_fine_lenslop;
+    mirror([0, negative])
+      translate([slotshorter, iadj])
+      square([length - slotshorter*2, interlock_fine + iadj*2]);
+  }
 }
 
 module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) {
@@ -173,15 +175,29 @@ module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=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 = [ // zstart         zend     ystart,      yend
+    for (vsect = [ // zs0            zs1      ys0,            ys1
 		  [ -tile_th-plusth, plusth,  0,              0],
-		  //[ z1,              z2,      0, protr],
-		  //[ z2,              z3,      protr, 0],
+		  [ z1,              z2,      0, yprotr],
+		  [ z2,              z3,      yprotr, 0],
 		  ]) {
-      translate([0, 0, vsect[0]])
-	linear_extrude(height=vsect[1]-vsect[0], convexity=10)
-	InterlockEdgePlan(negative, nlobes, length);
+      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);
     }
   }
 }