Crate lyon_tessellation [−] [src]
Lyon Tessellation
This crate implements tools to compute the tessellation of 2d paths fill and stroke operations, in order to render them efficiently on the GPU.
Overview
The path (fill and stroke) tessellators consume iterators of path events, and generate the tessellation using the BezierGeometryBuilder trait.
The input: iterators
The path tessellators are not tied to a particular data structure. Instead they consume iterators of path events. A Path struct in the crate lyon_path is provided for convenience (but is not mandatory).
The fill tessellator builds a FillEvents object from the iterator. It is an intermediate representation which can be cached if the path needs to be tessellated again.
The output: geometry builders
The tessellators are parametrized over a type implementing the BezierGeometryBuilder trait. This trait provides some simple methods to add vertices and triangles, without enforcing any particular representation for the resulting geometry. This is important because each application has its own internal representation for the vertex and index buffers sent to the GPU, and the tessellator needs to be able to write directly into these buffers without enforcing a particular vertex layout.
Each application will implement the BezierGeometryBuilder<Point>
trait in order to
generate vertex buffers and index buffers any type of vertex they want taking a 2d Point
as input for each vertex.
The structs VertexBuffers and
geometry_buider::BuffersBuilder are provided
for convenience.
Example
TODO
Reexports
pub use core::*; |
Modules
basic_shapes |
Tessellation routines for simple shapes. |
geometry_builder | |
path_fill | |
path_stroke |