lox 0.1.1

Fast polygon mesh library with different data structures and traits to abstract over those.
Documentation 
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//! Tests related to the `mesh!` macro.

use lox::{
    mesh, FaceHandle,
    prelude::*,
    core::SharedVertexMesh,
};


#[test]
fn empty_mesh() {
    let mesh = mesh! {
        type: SharedVertexMesh,
        vertices: [],
        faces: [],
    };

    assert_eq!(mesh.num_vertices(), 0);
    assert_eq!(mesh.num_faces(), 0);
}

#[test]
fn triangle() {
    let mesh = mesh! {
        type: SharedVertexMesh,
        vertices: [v0, v1, v2],
        faces: [[v0, v1, v2]],
    };

    assert_eq!(mesh.num_vertices(), 3);
    assert_eq!(mesh.num_faces(), 1);

    check_vertices_of_face_are_unique(&mesh);
}

#[test]
fn triangle_verbose() {
    let mesh = mesh! {
        type: SharedVertexMesh,
        vertices: [
            v0: (),
            v1,
            v2: (),
        ],
        faces: [
            [v0, v1, v2]: (),
        ],
    };

    assert_eq!(mesh.num_vertices(), 3);
    assert_eq!(mesh.num_faces(), 1);

    check_vertices_of_face_are_unique(&mesh);
}

#[test]
fn triangle_with_prop() {
    let (mesh, props) = mesh! {
        type: SharedVertexMesh,
        vertices: [
            v0: (10),
            v1: (20),
            v2: (30),
        ],
        faces: [[v0, v1, v2]],
    };

    assert_eq!(mesh.num_vertices(), 3);
    assert_eq!(mesh.num_faces(), 1);

    check_vertices_of_face_are_unique(&mesh);

    let face = mesh.faces().next().unwrap();
    let [va, vb, vc] = mesh.vertices_around_triangle(face.handle());

    let valid_props = [10, 20, 30];
    assert!(valid_props.contains(&props[va]));
    assert!(valid_props.contains(&props[vb]));
    assert!(valid_props.contains(&props[vc]));
}

#[test]
fn rectangle_multi_props() {
    let (mesh, _positions, _labels, names) = mesh! {
        type: SharedVertexMesh,
        vertices: [
            v0: (3.0, 'x'),
            v1: (5.0, 'y'),
            v2: (1.0, 'z'),
            v3: (8.2, 'w'),
        ],
        faces: [
            [v0, v1, v2]: ("one"),
            [v1, v2, v3]: ("two"),
        ],
    };


    assert_eq!(mesh.num_vertices(), 4);
    assert_eq!(mesh.num_faces(), 2);

    // TODO: check number of entries in property maps

    check_vertices_of_face_are_unique(&mesh);

    let valid_names = ["one", "two"];
    for face in mesh.faces() {
        assert!(valid_names.contains(&names[face.handle()]));
    }
}

fn check_vertices_of_face_are_unique(mesh: &(impl BasicAdj + TriMesh)) {
    for face in mesh.faces() {
        let [va, vb, vc] = mesh.vertices_around_triangle(face.handle());
        assert_ne!(va, vb);
        assert_ne!(va, vc);
        assert_ne!(vb, vc);
    }
}

mod inner {
    pub(crate) fn make_mesh() -> (
        lox::core::SharedVertexMesh,
        lox::map::DenseMap<lox::VertexHandle, char>,
        lox::map::DenseMap<lox::FaceHandle, u32>,
    ) {
        lox::mesh! {
            type: lox::core::SharedVertexMesh,
            vertices: [
                v0: ('x'),
                v1: ('y'),
                v2: ('z'),
                v3: ('w'),
            ],
            faces: [
                [v0, v1, v2]: (1u32),
                [v1, v2, v3]: (2u32),
            ],
        }
    }
}

#[test]
fn rectangle_multi_props_inner_mod() {
    let (mesh, labels, nums) = inner::make_mesh();

    assert_eq!(mesh.num_vertices(), 4);
    assert_eq!(mesh.num_faces(), 2);

    check_vertices_of_face_are_unique(&mesh);
    assert_eq!(labels.num_elements(), 4);
    assert_eq!(nums.num_elements(), 2);

    // TODO: check more
}

#[test]
fn poly_faces() {
    use lox::{
        core::{HalfEdgeMesh, half_edge::PolyConfig},
    };

    let mesh = mesh! {
        type: HalfEdgeMesh<PolyConfig>,
        vertices: [v0, v1, v2, v3, v4],
        faces: [
            [v0, v1, v2],
            [v1, v3, v4, v2],
        ],
    };

    assert_eq!(mesh.num_vertices(), 5);
    assert_eq!(mesh.num_faces(), 2);
    assert_eq!(mesh.vertices_around_face(FaceHandle::new(0)).count(), 3);
    assert_eq!(mesh.vertices_around_face(FaceHandle::new(1)).count(), 4);
}