polyhedron-ops 0.2.7

Conway/Hart Polyhedron Operations
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

use crate::*;
use bevy::render::mesh::{
    Indices, Mesh, PrimitiveTopology, VertexAttributeValues,
};

/// Conversion to a bevy [`Mesh`].
impl From<Polyhedron> for Mesh {
    fn from(mut polyhedron: Polyhedron) -> Self {
        polyhedron.reverse();

        let (index, positions, normals) = polyhedron.to_triangle_mesh_buffers();

        let mut mesh = Mesh::new(PrimitiveTopology::TriangleList);
        mesh.set_indices(Some(Indices::U32(index)));

        mesh.insert_attribute(
            Mesh::ATTRIBUTE_POSITION,
            VertexAttributeValues::Float32x3(
                positions
                    .par_iter()
                    .map(|p| [p.x, p.y, p.z])
                    .collect::<Vec<_>>(),
            ),
        );

        mesh.insert_attribute(
            Mesh::ATTRIBUTE_NORMAL,
            VertexAttributeValues::Float32x3(
                normals
                    .par_iter()
                    .map(|n| [-n.x, -n.y, -n.z])
                    .collect::<Vec<_>>(),
            ),
        );

        mesh
    }
}