add senbon_torii

examples/maze/senbon_torii.scad

@@ -0,0 +1,97 @@
+use <experimental/mz_hamiltonian.scad>;
+
+module senbon_torii(rows, columns, start, width, height) {
+    line = mz_hamiltonian(rows, columns, start);
+    leng = len(line);
+
+    // first torii
+    fst = line[0];
+    snd = line[1];
+    fa = atan2(snd[0] - fst[0], snd[1] - fst[1]);
+    
+    color("LightSalmon")
+    translate(line[0])
+    rotate([90, 0, fa]) 
+        linear_extrude(.1, center = true) 
+            translate([0, .175])
+                children(0);     
+               
+    // middle torris               
+    for(i = [0:leng - 2]) {
+        p1 = line[i];
+        p2 = line[i + 1];
+        md = (p1 + p2) / 2;
+        h = i * height + 0.1; 
+
+        a1 = atan2(p2[0] - p1[0], p2[1] - p1[1]);
+        
+        color("LightSalmon")
+        translate([md[0], md[1], h]) 
+        rotate([90, 0, a1]) 
+        linear_extrude(.1, center = true) 
+        translate([0, .1])
+            children(0);       
+                
+        color("LightSalmon")
+        if(i > 0) {
+            p0 = line[i - 1];
+            a2 = atan2(p1[0] - p0[0], p1[1] - p0[1]);
+            translate([p1[0], p1[1], h - width * 0.233333])
+            rotate([90, 0, a1 + (a1 - a2) / 2]) 
+            linear_extrude(.1, center = true) 
+            translate([0, .2])
+                children(0);  
+        }     
+        
+        color("OliveDrab")
+        hull() {
+            translate(p1) 
+            linear_extrude(h)
+                square(width, center = true);      
+
+            translate(p2) 
+            linear_extrude((i + 1) * height + 0.1)
+                square(width, center = true);     
+        }        
+    }
+    
+    // top
+    lst = line[leng - 1];
+    pre_lst = line[leng - 2];
+    la = atan2(lst[0] - pre_lst[0], lst[1] - pre_lst[1]);
+    
+    color("Gold")
+    translate([lst[0], lst[1], (leng - 1) * height])
+    rotate([90, 0, la]) 
+    linear_extrude(.3, center = true) 
+    translate([0, .175])
+        children(1);     
+}
+
+module torii_symbol() {       
+    
+    difference() {
+        translate([-0.025, 0.025])
+        text("⛩", font = "Segoe UI Emoji", size = 0.5 * 0.7, halign = "center");
+        
+        *translate([0, .285])
+            square([.275, .1], center = true);
+    }        
+}
+
+module top_symbol() {
+    translate([-0.005, .05])
+    scale([0.9, 1.5])
+        text("🏔", font = "Segoe UI Emoji", size = 0.45 * 0.7, halign = "center");  
+}
+
+senbon_torii(
+    rows = 2, 
+    columns = 3,
+    start = [0, 0],
+    width = .5,
+    height = .05
+) {
+    torii_symbol();
+    top_symbol();
+};