+ for (yshift=[-1,1])
+ translate([0, yshift * frontbackslop, 0])
+ DoKnives();
+ AtSides() { BlockPegSlot(); BlockPegSlot(); }
+ DecorativeIndents();
+ }
+}
+
+module BlockPrint(){ ////toplevel
+ rotate([0,0,90])
+ Block();
+}
+
+module CoverTemplate(){
+ linear_extrude(height=coverthick)
+ polygon([[minx, 0],
+ [maxx, 0],
+ [maxx, coverlonglen+0.1],
+ [maxx - coverside, coverlonglen+0.1],
+ [minx, covershortlen+0.1]]);
+}
+
+module CoverSide(len){
+ translate([0, 0 ,0]) {
+ rotate([90,0,90])
+ linear_extrude(height=coverside)
+ polygon([[0, 0],
+ [0, totaldepth],
+ [covertopwing, totaldepth],
+ [covertopwingbase, coverside + coverthick],
+ [len - covertopwingbase, coverside + coverthick],
+ [len - covertopwing, totaldepth],
+ [len, totaldepth],
+ [len, 0]]);
+ cube([recessblockwidth, recessblockheight, totaldepth]);
+ }
+}
+
+module Peg(){
+ echo("peg angle slope (must be <1)",
+ (peghead-pegstem)/(pegheight-pegstemheight));
+ dx = pegsloph;
+ dy = pegslopv;
+ rotate([90,0,0]) {
+ linear_extrude(height=peglen-pegslopl) {
+ intersection(){
+ translate([-dx,-dy,0]) PegTemplate(0);
+ translate([-dx,+dy,0]) PegTemplate(0);
+ translate([+dx,+dy,0]) PegTemplate(0);
+ translate([+dx,-dy,0]) PegTemplate(0);
+ }
+ }
+ }
+}
+
+module CoverPegSlot(coverlen){
+ translate([recessblockwidth/2, 0, -1]){
+ linear_extrude(height= 1 + pegrecess + 0.5*peglen){
+ PegTemplate(0);
+ }
+ }
+}
+
+module HolesScope(){
+ intersection_for (dx=[-1,+1]) {
+ intersection_for (dy=[-1,+1]) {
+ translate([dx * holeedge, dy * holeedge, -5])
+ scale([1,1,10])
+ CoverTemplate();
+ }
+ }
+}
+
+module HexGrid(xa,xb,ya,yb) {
+ imin = floor(xa / holepitch);
+ imax = ceil(xb / holepitch);
+ jmin = floor(ya / (sqrt(3)*holepitch));
+ jmax = ceil(yb / (sqrt(3)*holepitch));
+ echo("HexGrid ",imin,imax,jmin,jmax);
+ for (i=[imin:imax]) {
+ for (j=[jmin:jmax]) {
+ translate([(j * sqrt(3) + holeoffx) * holepitch,
+ (i + 0.5 + holeoffy) * holepitch,
+ 0]) {
+ child();
+ translate([sqrt(3)/2 * holepitch, -0.5 * holepitch, 0])
+ child();
+ }
+ }
+ }
+}
+
+module Hole(){
+ cylinder(r=holesize/2, h=40, $fn=40);
+}
+
+module Holes(){
+ intersection(){
+ translate([0, 0, -20])
+ HexGrid(0, coverlonglen, minx, maxx)
+ Hole();
+ HolesScope();
+ }
+}
+
+module CoverCover(){
+ difference(){
+ CoverTemplate();
+ Holes();
+ }
+}
+
+module Cover(){
+ difference(){
+ union(){
+ CoverCover();
+ AtSides() { CoverSide(covershortlen); CoverSide(coverlonglen); }
+ }
+ AtSides() { CoverPegSlot(); CoverPegSlot(); }
+ }
+}
+
+module CoverAligned(){
+ translate([0,-front,-height])
+ rotate([-90,0,0])
+ Cover();
+}
+
+module DemoPeg(){
+ translate([recessblockwidth/2, pegrecess, -height])
+ Peg();
+}
+
+module Demo(){ ////toplevel
+ %Block();
+ DoKnives();
+ color([0,0,1]) CoverAligned();
+ color([1,0,0]) AtSides() { DemoPeg(); DemoPeg(); }
+}
+
+module Pegs(){ ////toplevel
+ Peg();
+ translate([-peghead-3, 0,0]) Peg();
+}
+
+module CoverParts(){ ////toplevel
+ Cover();
+ translate([0, coverlonglen, pegheight/2-pegslopv])
+ Pegs();
+}
+
+module FrontDemo(){ ////toplevel
+ color([1,0,1]) Block();
+ color([1,0,1]) CoverAligned();
+ color([0,0,0]) DoKnives();
+}
+
+module BlockFrontTest(){ ////toplevel
+ intersection(){
+ Block();
+ translate([minx-10, -front-10, -height-10]) {
+ cube([75,14,35]);
+ cube([75,25,13]);
+ }