truchet 0.1.1

Library for truchet tiling
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
143
144
145
146
147
148
149

use rand::{prelude::Distribution, distributions::Standard};
use svg::{node::element::Polygon, Node};

use crate::{to_svg::ToSVG, vec2::Vec2};

use super::traits::Tile;

#[derive(Clone, Copy)]
pub enum ElasticTileType {
    ///
    /// ```
    /// |*       |
    /// |***     |
    /// |*****   |
    /// |********|
    /// 
    A,
    ///
    /// ```
    /// |********|
    /// |*****   |
    /// |***     |
    /// |*       |
    /// 
    B,
    ///
    /// ```
    /// |********|
    /// |  ******|
    /// |     ***|
    /// |       *|
    /// 
    C,
    ///
    /// ```
    /// |       *|
    /// |     ***|
    /// |  ******|
    /// |********|
    /// 
    D
}

impl ToString for ElasticTileType {
    fn to_string(&self) -> String {
        return match self {
            ElasticTileType::A => "A".to_owned(),
            ElasticTileType::B => "B".to_owned(),
            ElasticTileType::C => "C".to_owned(),
            ElasticTileType::D => "D".to_owned(),
        };
    }
}

#[derive(Clone, Copy)]
pub struct ElasticTriangleTile {
    t: f32,
    tile_type: ElasticTileType
}

impl ElasticTriangleTile {
    pub const fn new(t: f32, tile_type: ElasticTileType) -> Self { 
        return Self { t, tile_type };
    }

    pub const fn type_a() -> Self {
        return Self::new(0.5, ElasticTileType::A);
    }

    pub const fn type_b() -> Self {
        return Self::new(0.5, ElasticTileType::B);
    }

    pub const fn type_c() -> Self {
        return Self::new(0.5, ElasticTileType::C);
    }

    pub const fn type_d() -> Self {
        return Self::new(0.5, ElasticTileType::D);
    }

    fn point(&self) -> Vec2<f32> {
        return  match self.tile_type {
            ElasticTileType::A => Vec2::new(1.0 - (0.5  * self.t + 0.25),  0.5 * self.t + 0.25),
            ElasticTileType::B => Vec2::new(1.0 - (0.5 * self.t + 0.25),   1.0 - (0.5 * self.t + 0.25)),
            ElasticTileType::C => Vec2::new(0.5  * self.t + 0.25,  1.0 - (0.5 * self.t + 0.25)),
            ElasticTileType::D => Vec2::new(0.5 * self.t + 0.25,  0.5 * self.t + 0.25),
        };
    }
}

impl Default for ElasticTriangleTile {
    #[inline]
    fn default() -> Self {
        return Self::type_a();
    }
}

impl Tile for ElasticTriangleTile {
    fn set_brightness(&mut self, brightness: f32) {
        if brightness < 0.25 {
            self.t = 0.0;
        } else if brightness > 0.75 {
            self.t = 1.0;
        } else {
            self.t = 2.0 * brightness - 0.5;
        }
    }
}

impl ToSVG for ElasticTriangleTile {
    fn to_svg_node(&self) -> Box<dyn Node> {
        let (mut x, mut y) = match self.tile_type {
            ElasticTileType::A => (vec![1_f32, 0_f32, 0_f32], vec![1_f32, 1_f32, 0_f32]),
            ElasticTileType::B => (vec![0_f32, 0_f32, 1_f32], vec![1_f32, 0_f32, 0_f32]),
            ElasticTileType::C => (vec![0_f32, 1_f32, 1_f32], vec![0_f32, 0_f32, 1_f32]),
            ElasticTileType::D => (vec![1_f32, 1_f32, 0_f32], vec![0_f32, 1_f32, 1_f32])
        };

        let t = self.point();
        x.push(t.x());
        y.push(t.y());

        let points: Vec<f32> = x.into_iter()
            .zip(
                y.into_iter()
            )
            .flat_map(|(x, y)| [x, y])
            .collect();

        let polygon = Polygon::new()
            .set("points", points)
            .set("t", self.t)
            .set("type", self.tile_type.to_string());

        return Box::new(polygon);
    }
}

impl Distribution<ElasticTriangleTile> for Standard {
    fn sample<R: rand::Rng + ?Sized>(&self, rng: &mut R) -> ElasticTriangleTile {
        match rng.gen_range(0..=3) {
            0 => ElasticTriangleTile::type_a(),
            1 => ElasticTriangleTile::type_b(),
            2 => ElasticTriangleTile::type_c(),
            _ => ElasticTriangleTile::type_d()
        }
    }
}