tiling

tiling is a library for constructing tilings of regular polygons and their dual tilings.

Resources

• Documentation
• Tilings by regular polygons
• List of Euclidian uniform tilings

Examples

Here are some tilings produced by the examples in the examples directory.

Requirements

tiling uses cairo-rs for rendering and requires cairo to be installed.

Usage

Create an empty tiling model.

```rust let (width, height, scale) = (1024, 1024, 128.0);

let mut model = Model::new(width, height, scale); ```

Place a polygon at the origin. This adds a hexagon.

```rust let stroke = Color::new(242, 60, 60)?; let fill_hexagon = Color::new(242, 194, 106)?;

model.add(Shape::new(6, fill_hexagon, stroke)?); ```

At this point we can render the model.

```rust let background = Color::new(242, 242, 242)?; let margin = 0.1; let showlabels = false; let linewidth = 0.1;

let render = model.render(background, margin, linewidth, showlabels)?; render.writetopng("output.png")?; ```

Let's continue by attaching a square to each of the hexagon's sides.

```rust let fill_square = Color::new(23, 216, 146)?;

let squares = model.addmulti(0..1, 0..6, Shape::new(4, fillsquare, stroke)?)?; ```

The first parameter 0..1 is a range that indicates the shape(s) to attach to (by their index). In this example, the square is attached to the hexagon (index 0).

When show_labels is true, each shape is labeled with its index.

The second paramter 0..6 is a range that indicates the edge(s) to attach to (by their index). In this example, the square is attached to all six edges of the hexagon.

When show_labels is true, each edge is labeled with its index.

The final paramter defines the shape to add (a square).

The add_multi method returns a range containing the indexes of the added square shapes so they can be referenced later. We'll see how to do that next.

Now, attach triangles to all of the squares using the previously returned range squares. Here, a triangle is attached to edge 1 of each square.

```rust let fill_triangle = Color::new(242, 209, 48)?;

let _ = model.addmulti(squares.clone(), 1..2, Shape::new(3, filltriangle, stroke)?)?; ```

Let's wrap up by attaching a hexagon to the outer edge of each square. These hexagons will define the repeating positions of the tiling.

rust let hexagons = model.add_multi(squares.clone(), 2..3, Shape::new(6, fill_hexagon, stroke)?)?;

Now that the tiling's repeating pattern is complete, use the repeat method to fill the rest of the surface with the pattern.

rust model.repeat(hexagons)?;

Once satisfied, disable the shape and edge labels and adjust the scale.

The complete code for this example is in examples/intro.rs.

Dual tilings may be created using the render_dual method. A tiling's dual is formed by drawing edges between the centers of adjacent polygons.

Here is the dual tiling of the above example.

Installation

tiling is available on crates.io and can be included in your Cargo enabled project.

toml [dependencies] tiling = "0.1.0"

Future improvements

• Declarative API
• Reduce memory usage by reusing Shape references
• Generate tiling models by interpreting their vertex configuration
• Command line tool
• Support shape and edge attachment via disjoint ranges
• Support different image output types

Acknowledgements

This library was inspired by Michael Fogleman's Tiling Python tool. Several of the low-level geometric computations in this crate are based on implementations found in Tiling.