44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
//! Draw geometry using meshes of triangles.
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use crate::{Color, Gradient};
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use bytemuck::{Pod, Zeroable};
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/// A set of [`Vertex2D`] and indices representing a list of triangles.
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#[derive(Clone, Debug)]
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pub struct Mesh2D {
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/// The vertices of the mesh
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pub vertices: Vec<Vertex2D>,
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/// The list of vertex indices that defines the triangles of the mesh.
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///
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/// Therefore, this list should always have a length that is a multiple of 3.
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pub indices: Vec<u32>,
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}
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/// A two-dimensional vertex.
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#[derive(Copy, Clone, Debug, Zeroable, Pod)]
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#[repr(C)]
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pub struct Vertex2D {
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/// The vertex position in 2D space.
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pub position: [f32; 2],
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}
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#[derive(Debug, Clone, PartialEq)]
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/// Supported shaders for triangle primitives.
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pub enum Style {
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/// Fill a primitive with a solid color.
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Solid(Color),
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/// Fill a primitive with an interpolated color.
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Gradient(Gradient),
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}
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impl From<Color> for Style {
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fn from(color: Color) -> Self {
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Self::Solid(color)
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}
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}
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impl From<Gradient> for Style {
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fn from(gradient: Gradient) -> Self {
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Self::Gradient(gradient)
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}
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}
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