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//! Draw geometry using meshes of triangles.
use crate::Color;
#[cfg(not(target_arch = "wasm32"))]
use crate::Gradient;
use bytemuck::{Pod, Zeroable};
/// A set of [`Vertex2D`] and indices representing a list of triangles.
#[derive(Clone, Debug)]
pub struct Mesh2D {
/// The vertices of the mesh
pub vertices: Vec<Vertex2D>,
/// The list of vertex indices that defines the triangles of the mesh.
///
/// Therefore, this list should always have a length that is a multiple of 3.
pub indices: Vec<u32>,
}
/// A two-dimensional vertex.
#[derive(Copy, Clone, Debug, Zeroable, Pod)]
#[repr(C)]
pub struct Vertex2D {
/// The vertex position in 2D space.
pub position: [f32; 2],
}
#[derive(Debug, Clone, PartialEq)]
/// Supported shaders for triangle primitives.
pub enum Style {
/// Fill a primitive with a solid color.
Solid(Color),
#[cfg(not(target_arch = "wasm32"))]
/// Fill a primitive with an interpolated color.
Gradient(Gradient),
}
impl From<Color> for Style {
fn from(color: Color) -> Self {
Self::Solid(color)
}
}
#[cfg(not(target_arch = "wasm32"))]
impl From<Gradient> for Style {
fn from(gradient: Gradient) -> Self {
Self::Gradient(gradient)
}
}
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