56 releases (2 stable)

1.0.1 Nov 6, 2022
1.0.0 Jul 11, 2022
0.17.10 Oct 12, 2021
0.17.5 Jan 30, 2021
0.1.1 Jul 14, 2016

#314 in Graphics APIs

Download history 13630/week @ 2024-07-29 13529/week @ 2024-08-05 15692/week @ 2024-08-12 10507/week @ 2024-08-19 11555/week @ 2024-08-26 11607/week @ 2024-09-02 12584/week @ 2024-09-09 12543/week @ 2024-09-16 13312/week @ 2024-09-23 11426/week @ 2024-09-30 8583/week @ 2024-10-07 11791/week @ 2024-10-14 10603/week @ 2024-10-21 11935/week @ 2024-10-28 10492/week @ 2024-11-04 9389/week @ 2024-11-11

42,894 downloads per month
Used in 157 crates (43 directly)

MIT/Apache

1MB
33K SLoC

Lyon

A path tessellation library written in rust for GPU-based 2D graphics rendering.

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Example

extern crate lyon;
use lyon::math::point;
use lyon::path::Path;
use lyon::tessellation::*;

fn main() {
    // Build a Path.
    let mut builder = Path::builder();
    builder.begin(point(0.0, 0.0));
    builder.line_to(point(1.0, 0.0));
    builder.quadratic_bezier_to(point(2.0, 0.0), point(2.0, 1.0));
    builder.cubic_bezier_to(point(1.0, 1.0), point(0.0, 1.0), point(0.0, 0.0));
    builder.end(true);
    let path = builder.build();
    // Let's use our own custom vertex type instead of the default one.
    #[derive(Copy, Clone, Debug)]
    struct MyVertex { position: [f32; 2] };
    // Will contain the result of the tessellation.
    let mut geometry: VertexBuffers<MyVertex, u16> = VertexBuffers::new();
    let mut tessellator = FillTessellator::new();
    {
        // Compute the tessellation.
        tessellator.tessellate_path(
            &path,
            &FillOptions::default(),
            &mut BuffersBuilder::new(&mut geometry, |vertex: FillVertex| {
                MyVertex {
                    position: vertex.position().to_array(),
                }
            }),
        ).unwrap();
    }
    // The tessellated geometry is ready to be uploaded to the GPU.
    println!(" -- {} vertices {} indices",
        geometry.vertices.len(),
        geometry.indices.len()
    );
}

Dependencies

~1.5MB
~39K SLoC