dotSCAD/examples/tiles/2_edge_wang_tiles_basic.scad

use <experimental/tile_w2e.scad>;
use <arc.scad>;

rows = 10;
columns = 15;
tile_width = 10;
tile_thickness = 2;
$fn = 24;

translate([tile_width, tile_width] / 2)
	for(tile = tile_w2e(rows, columns)) {
		x = tile[0];
		y = tile[1];
		i = tile[2];
		translate([x, y] * tile_width)
			sample_tile(i, tile_width, tile_thickness);
	}
	
translate([0, tile_width * (rows + 1)] + [tile_width, tile_width] / 2)
	color("green")
	for(tile = tile_w2e(rows, columns)) {
		x = tile[0];
		y = tile[1];
		i = tile[2];
		translate([x, y] * tile_width)
			path_tile(i, tile_width);
	}

module sample_tile(n, width, thickness) {
    half_w = width / 2;
	
	diff_polygons = [
	    [[]],
		[[[0, 0], [half_w, half_w], [-half_w, half_w]]],
		[[[0, 0], [half_w, -half_w], [half_w, half_w]]],
		[[[-half_w, half_w], [half_w, -half_w], [half_w, half_w]]],
		[[[0, 0], [-half_w, -half_w], [half_w, -half_w]]],
		[
		    [[0, 0], [half_w, half_w], [-half_w, half_w]],
		    [[0, 0], [-half_w, -half_w], [half_w, -half_w]]
		],
		[[[-half_w, -half_w], [half_w, -half_w], [half_w, half_w]]],
		[[[0, 0], [-half_w, -half_w], [half_w, -half_w], [half_w, half_w], [-half_w, half_w]]],
		[[[0, 0], [-half_w, half_w], [-half_w, -half_w]]],
		[[[-half_w, half_w], [-half_w, -half_w], [half_w, half_w]]],
		[
		    [[0, 0], [-half_w, half_w], [-half_w, -half_w]],
		    [[0, 0], [half_w, -half_w], [half_w, half_w]]
		],
		[[[0, 0], [half_w, -half_w], [half_w, half_w], [-half_w, half_w], [-half_w, -half_w]]],
		[[[-half_w, half_w], [-half_w, -half_w], [half_w, -half_w]]],
		[[[0, 0], [half_w, half_w], [-half_w, half_w], [-half_w, -half_w], [half_w, -half_w]]],
		[[[0, 0], [-half_w, half_w], [-half_w, -half_w], [half_w, -half_w], [half_w, half_w]]],
		[[[half_w, half_w], [-half_w, half_w], [-half_w, -half_w], [half_w, -half_w]]]
	];

    color("blue")
    linear_extrude(thickness) 
	difference() {
        square(width, center = true);
		for(diff_polygon = diff_polygons[n]) {
		    offset(0.01) polygon(diff_polygon);
		}
	}
	
	color("yellow")
	linear_extrude(thickness / 2)
	    square(width, center = true);
}

module path_tile(n, width) {
    half_w = width / 2;
	quarter_w = width / 4;
	
	module tile1() {
		difference() {
			square(width, center = true);
			circle(quarter_w);
			translate([0, quarter_w])
				square([quarter_w, quarter_w * 2], center = true);
		}
	}
	
	module tile3() {
        difference() {
			square(width, center = true);
			translate([half_w, half_w])
			arc(radius = half_w, angle = [180, 270], width = quarter_w);
		}
	}

	module tile5() {
        difference() {
			square(width, center = true);
			square([quarter_w, width], center = true);
		}
	}
	
	module tile7() {
        intersection() {
			square(width, center = true);
			translate([half_w, half_w])
			    circle(1.5 * quarter_w);
		}
        intersection() {
			square(width, center = true);
			translate([half_w, -half_w])
			    circle(1.5 * quarter_w);
		}
        intersection() {
			square(width, center = true);
			translate([-1.25 * half_w, 0])
                square(width, center = true);
		}
	}
	
	module tile15() {
	    for(i = [0:3]) {
			rotate(90 * i)
			intersection() {
				square(width, center = true);
				translate([half_w, half_w])
					circle(1.5 * quarter_w);
			}
		}
	}

	module select_child(n) {
		children(n);
	}

	select_child(n) {
		square(width, center = true);
		tile1();
		rotate(-90) tile1();
		tile3();
		rotate(-180) tile1();
		tile5();
		rotate(-90) tile3();
		tile7();
		rotate(90) tile1();
		rotate(90) tile3();
		rotate(90) tile5();
		rotate(90) tile7();
		rotate(-180) tile3();
		rotate(180) tile7();
		rotate(270) tile7();
		tile15();
	}
}