add pyramid_hex_maze

examples/maze/pyramid_hex_maze.scad

@@ -0,0 +1,60 @@
+use <polyline2d.scad>;
+use <maze/mz_blocks.scad>;
+use <maze/mz_hex_walls.scad>;
+
+columns = 10;
+cell_radius = 2;
+wall_thickness = 1;
+
+module pyramid_hex_maze(columns, cell_radius, wall_thickness) {
+    module bottom(rows, columns, cell_radius, wall_thickness) {
+        grid_h = 2 * cell_radius * sin(60);
+        grid_w = cell_radius + cell_radius * cos(60);	
+        for(x_cell = [0:columns - 1]) {
+            for(y_cell = [0:rows - 1]) {
+                translate([grid_w * x_cell, grid_h * y_cell + (x_cell % 2 == 0 ? 0 : grid_h / 2), 0])  
+                    circle(cell_radius + wall_thickness, $fn = 6);
+            }
+        }
+    }
+
+    rows = round(0.866 * columns - 0.211);
+
+    grid_h = 2 * cell_radius * sin(60);
+    grid_w = cell_radius + cell_radius * cos(60);	
+    
+    square_w = grid_w * (columns - 1) + cell_radius * 2 + wall_thickness * 2;
+    square_h = grid_h * rows + grid_h / 2 + wall_thickness * 2;
+    square_offset_x = square_w / 2 -cell_radius - wall_thickness;
+    square_offset_y = square_h / 2 -grid_h / 2 - wall_thickness;
+    
+    pyramid_height = square_w / sqrt(2);
+
+    blocks = mz_blocks(
+        [1, 1],  
+        rows, columns
+    );
+
+    walls = mz_hex_walls(blocks, rows, columns, cell_radius, wall_thickness);
+
+    intersection() {    
+        linear_extrude(pyramid_height) 
+            for(wall = walls) {
+                polyline2d(
+                    wall, 
+                    wall_thickness,
+                    startingStyle = "CAP_ROUND", endingStyle = "CAP_ROUND"
+                );    
+            }
+
+        translate([square_offset_x, square_offset_y, 0]) 
+            linear_extrude(pyramid_height, scale = 0) 
+              square([square_w, square_h], center = true);       
+    }
+        
+    linear_extrude(wall_thickness)
+        bottom(rows, columns, cell_radius, wall_thickness);
+        
+}
+
+pyramid_hex_maze(columns, cell_radius, wall_thickness);