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 |
#197 in Graphics APIs
49,579 downloads per month
Used in 155 crates
(43 directly)
1MB
33K
SLoC
Lyon
A path tessellation library written in rust for GPU-based 2D graphics rendering.
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
~2MB
~40K SLoC