f3l_surface 0.2.0

3D Point Cloud Library
Documentation 
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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

#[cfg(feature = "app_kiss3d")]
use kiss3d::light::Light;
#[cfg(feature = "app_kiss3d")]
use kiss3d::nalgebra::Point3;
#[cfg(feature = "app_kiss3d")]
use kiss3d::window::Window;

#[cfg(not(feature = "app_kiss3d"))]
fn main() {
    println!("Add --features=app_kiss3d")
}

pub fn hsv_to_rgb(hsv: &[f32; 3]) -> [f32; 3] {
    let [h, s, v] = *hsv;

    let hh = h * 6.;
    let hi = hh as usize;
    let f = hh - hi as f32;
    let p = v * (1. - s);
    let q = v * (1. - f * s);
    let t = v * (1. - (1. - f) * s);

    match hi {
        0 => [v, t, p],
        1 => [q, v, p],
        2 => [p, v, t],
        3 => [p, q, v],
        4 => [t, p, v],
        5 => [v, p, q],
        _ => [0., 0., 0.],
    }
}

pub fn random_color() -> [f32; 3] {
    use rand::Rng;
    let mut rng = rand::thread_rng();
    hsv_to_rgb(&[rng.gen_range(0f32..1f32), 1.0, 1.0])
}

#[cfg(feature = "app_kiss3d")]
fn load_img(path: &str) -> Vec<[f32; 2]> {
    use image::GenericImageView;
    let img = image::open(path).unwrap();
    let dimension = img.dimensions();
    img.pixels()
        .into_iter()
        .enumerate()
        .filter_map(|(i, (x, y, rgb))| {
            if i % 10 != 0 {
                return None;
            }
            let a = rgb.0;
            if a.iter().all(|&c| c != 0) {
                Some([x as f32 / dimension.0 as f32, y as f32 / dimension.1 as f32])
            } else {
                None
            }
        })
        .collect::<Vec<_>>()
}

#[cfg(feature = "app_kiss3d")]
fn main() {
    use f3l_surface::{Delaunay2D, Delaunay2DShape, FaceIdType};

    println!("Using Kiss3d app");
    println!("Vertex Voxel Down 10x, so edges may not be straight.");

    let mut window = Window::new("Kiss3d: points");

    window.set_light(Light::StickToCamera);
    window.set_point_size(10.0); // (Not supported by all graphic drivers)

    // Four pictures could be used to show example.
    // let points = load_img("../../data/hull.png");
    // let points = load_img("../../data/hull_hole.png");
    // let points = load_img("../../data/hull_hole_multiple.png");
    let points = load_img("../../data/hull_hole_multiples.png");

    let mut solver = Delaunay2D::new(&points);

    solver.compute(0.005);

    let view_points = points
        .iter()
        .map(|&p| Point3::new(p[0], p[1], 0.))
        .collect::<Vec<_>>();

    let o = Point3::<f32>::origin();
    let x = Point3::<f32>::new(1., 0., 0.);
    let y = Point3::<f32>::new(0., 1., 0.);
    let z = Point3::<f32>::new(0., 0., 1.);
    let xc = Point3::<f32>::new(1., 0., 0.);
    let yc = Point3::<f32>::new(0., 1., 0.);
    let zc = Point3::<f32>::new(0., 0., 1.);
    let w = Point3::<f32>::new(1., 1., 1.);

    let shapes = solver.shapes;

    let shapes = shapes
        .into_iter()
        .map(|shape| {
            let Delaunay2DShape { mesh, contours } = shape;
            let c: Point3<f32> = random_color().into();

            let mesh = mesh
                .into_iter()
                .flat_map(|FaceIdType { point }| {
                    [(0, 1), (0, 2), (1, 2)]
                        .into_iter()
                        .map(|(a, b)| (view_points[point[a]], view_points[point[b]]))
                        .collect::<Vec<_>>()
                })
                .collect::<Vec<_>>();
            let contours = contours
                .into_iter()
                .flat_map(|contour| {
                    contour
                        .into_iter()
                        .map(|(a, b)| (view_points[a], view_points[b]))
                        .collect::<Vec<_>>()
                })
                .collect::<Vec<_>>();
            (c, mesh, contours)
        })
        .collect::<Vec<_>>();

    while window.render() {
        window.draw_line(&o, &x, &xc);
        window.draw_line(&o, &y, &yc);
        window.draw_line(&o, &z, &zc);

        shapes.iter().for_each(|(color, mesh, contours)| {
            mesh.iter().for_each(|(a, b)| {
                window.draw_line(a, b, color);
            });
            contours.iter().for_each(|(a, b)| {
                window.draw_line(a, b, &w);
            });
        });
    }
}