add cylinder_maze

examples/cylinder_maze.scad

@@ -0,0 +1,100 @@
+include <hollow_out.scad>;
+include <bend.scad>;
+include <square_maze.scad>;
+
+radius = 30; 
+height = 60;
+block_width = 8;
+
+wall_thickness = 5;
+wall_height = 5;
+wall_top_scale = 0.25;
+
+shell_thickness = 2;
+fn = 24;
+
+module draw_ramp_maze(rows, columns, blocks, block_width, wall_thickness, wall_height, wall_top_scale) {
+
+    module ramp_line(point1, point2, width = 1, height = 1, top_scale = 0.25) {
+        angle = 90 - atan((point2[1] - point1[1]) / (point2[0] - point1[0]));
+        offset_x = 0.5 * width * cos(angle);
+        offset_y = 0.5 * width * sin(angle);
+
+        offset1 = [-offset_x, offset_y];
+        offset2 = [offset_x, -offset_y];
+
+        hull() {
+            translate(point1) 
+                linear_extrude(height, scale = top_scale) 
+                    square(width, center = true);
+            translate(point2) 
+                linear_extrude(height, scale = top_scale) 
+                    square(width, center = true);
+        }
+    }
+
+    module draw_ramp_block(wall_type, block_width, wall_thickness, wall_height, wall_top_scale) {
+        if(wall_type == UPPER_WALL || wall_type == UPPER_RIGHT_WALL) {
+            ramp_line(
+                [0, block_width], [block_width, block_width], wall_thickness, wall_height, wall_top_scale
+            ); 
+        }
+
+        if(wall_type == RIGHT_WALL || wall_type == UPPER_RIGHT_WALL) {
+            ramp_line(
+                [block_width, block_width], [block_width, 0], wall_thickness, wall_height, wall_top_scale
+            ); 
+        }
+    }
+
+    for(block = blocks) {
+        translate([get_x(block) - 1, get_y(block) - 1] * block_width) 
+            draw_ramp_block(
+                get_wall_type(block), 
+                block_width, 
+                wall_thickness,
+                wall_height,
+                wall_top_scale
+            );
+    }
+
+    ramp_line(
+        [0, 0], [block_width * columns, 0], 
+        wall_thickness, wall_height, wall_top_scale
+    );
+} 
+
+   
+module maze_cylinder() {
+    maze_rows = round(height / block_width);
+    maze_columns = round(2 * 3.14159 * radius / block_width);
+
+    maze_blocks = go_maze(
+        1, maze_rows,   
+        starting_maze(maze_rows, maze_columns),  
+        maze_rows, maze_columns,
+        x_circular = true
+    );
+    
+    leng_circumference = block_width * maze_columns + wall_thickness;
+
+    union() {
+        bend(size = [leng_circumference, block_width * maze_rows + wall_thickness, wall_height], angle = 360 + 360 * wall_thickness / leng_circumference, frags = fn) 
+        translate([0, wall_thickness / 2, 0]) draw_ramp_maze(
+            maze_rows, 
+            maze_columns, 
+            maze_blocks, 
+            block_width, 
+            wall_thickness,
+            wall_height,
+            wall_top_scale
+        );
+
+        linear_extrude(maze_rows * block_width + wall_thickness) 
+            hollow_out(shell_thickness = shell_thickness) 
+                circle(radius - wall_height + 0.5, $fn = fn);
+
+    }
+}
+
+maze_cylinder();