add heart_maze

examples/maze/heart_maze.scad

@@ -0,0 +1,105 @@
+include <line2d.scad>;
+include <hollow_out.scad>;
+include <square_maze.scad>;
+
+// only for creating a small maze
+
+radius_of_heart = 15;
+wall_thickness = 2;
+wall_height = 1;
+cblocks = 6;
+levels = 3;
+
+module heart(radius, tip_r) {
+    offset_h = 0.410927 * radius;
+	
+    translate([radius * 0.707107, offset_h, 0]) 
+    rotate([0, 0, -45])
+    hull() {
+        circle(radius);
+		translate([radius - tip_r, -radius * 2 + tip_r, 0]) 
+		    circle(tip_r);
+	}
+	
+	translate([-radius * 0.707107, offset_h, 0]) 
+    rotate([0, 0, 45]) 
+    hull() {
+        circle(radius);
+		translate([-radius + tip_r, -radius * 2 + tip_r, 0]) 
+		    circle(tip_r);
+	}
+}
+    
+module ring_heart(radius, thickness) {
+    hollow_out(thickness) 
+        heart(radius + thickness, 5);
+}
+
+module ring_heart_sector(radius, angle, thickness, width) {
+	intersection() {
+		ring_heart(radius - 0.1, thickness + 0.2);
+		rotate([0, 0, angle]) 
+            line2d([0, 0], [0, radius * 3 + width], width);
+	}
+}
+
+module heart_to_heart_wall(radius, length, angle, thickness) {
+    intersection() {
+        difference() {
+            heart(radius + 1 + length , 5);
+            heart(radius + 1, 5);
+	    }
+	    rotate([0, 0, angle]) 
+            line2d([0, 0], [0, (radius + length) * 2 + thickness], thickness);
+	}
+}
+
+module heart_maze(radius, cblocks, levels, thickness = 1) {    
+    arc_angle = 360 / cblocks;
+	r = radius / (levels + 1);
+	
+	maze = go_maze(1, 1, 
+        starting_maze(cblocks, levels),
+        cblocks, levels, y_circular = true
+    );
+
+	difference() {
+		render() union() {
+			for(i = [1 : levels + 1]) {
+			    ring_heart(r * i, thickness);
+			}
+		  
+		  
+			for(i = [0:len(maze) - 1]) { 
+				block = maze[i];
+				cr = get_x(block); 
+				cc = get_y(block) - 1;    
+				
+				angle = cc * arc_angle;
+				 
+				if(upper_wall(block) || upper_right_wall(block)) { 
+				    heart_to_heart_wall(r * cr, r, cc * arc_angle , thickness);
+				} 
+			}
+	    }
+		
+		render() union() {
+		    // maze entry
+			// ring_heart_sector(r, arc_angle / 1.975 , thickness, r / 3);   
+
+	        // road to the next level
+			for(i = [0:len(maze) - 1]) { 
+				block = maze[i];
+				cr = get_x(block); 
+				cc = get_y(block) - 1;   
+				
+				if(no_wall(block) || upper_wall(block)) { 
+				    ring_heart_sector(r * (cr + 1), (cc + 0.5) * arc_angle , thickness, r / 3);
+				}  
+			}
+		}
+	}
+}
+
+linear_extrude(wall_height) 
+    heart_maze(radius_of_heart, cblocks, levels, wall_thickness);