rustsim-spaces 0.0.1

Space implementations (grid, continuous, graph, hybrid) for rustsim
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
150
151
152
153
154
155
156

use rustsim_core::{interaction::PositionedAgent, prelude::Agent, types::AgentId};
use rustsim_spaces::continuous::{ContinuousPos, ContinuousSpace2D};

#[derive(Debug, Clone)]
struct Particle {
    id: AgentId,
    pos: ContinuousPos,
}

impl Agent for Particle {
    fn id(&self) -> AgentId {
        self.id
    }
}

impl PositionedAgent for Particle {
    type Position = ContinuousPos;

    fn position(&self) -> &ContinuousPos {
        &self.pos
    }

    fn set_position(&mut self, pos: ContinuousPos) {
        self.pos = pos;
    }
}

#[test]
fn continuous_space_add_and_nearby() {
    let mut space = ContinuousSpace2D::new(10.0, 10.0, false, 1.0).unwrap();

    let p1 = Particle {
        id: 1,
        pos: ContinuousPos::new(2.5, 2.5),
    };
    let p2 = Particle {
        id: 2,
        pos: ContinuousPos::new(3.0, 2.5),
    };
    let p3 = Particle {
        id: 3,
        pos: ContinuousPos::new(8.0, 8.0),
    };

    use rustsim_core::interaction::SpaceInteraction;
    space.add_agent(&p1).unwrap();
    space.add_agent(&p2).unwrap();
    space.add_agent(&p3).unwrap();

    let near = space.nearby_ids_euclidean(&ContinuousPos::new(2.5, 2.5), 1.0);
    assert!(near.contains(&1));
    assert!(near.contains(&2));
    assert!(!near.contains(&3));
}

#[test]
fn continuous_space_periodic_wrapping() {
    let mut space = ContinuousSpace2D::new(10.0, 10.0, true, 2.0).unwrap();

    let p1 = Particle {
        id: 1,
        pos: ContinuousPos::new(0.5, 0.5),
    };
    let p2 = Particle {
        id: 2,
        pos: ContinuousPos::new(9.5, 9.5),
    };

    use rustsim_core::interaction::SpaceInteraction;
    space.add_agent(&p1).unwrap();
    space.add_agent(&p2).unwrap();

    let near = space.nearby_ids_euclidean(&ContinuousPos::new(0.5, 0.5), 2.0);
    assert!(near.contains(&1));
    assert!(near.contains(&2), "periodic wrapping should find agent 2");
}

#[test]
fn continuous_space_move_updates_grid() {
    let mut space = ContinuousSpace2D::new(10.0, 10.0, false, 1.0).unwrap();

    let p1 = Particle {
        id: 1,
        pos: ContinuousPos::new(1.0, 1.0),
    };

    use rustsim_core::interaction::SpaceInteraction;
    space.add_agent(&p1).unwrap();

    let near_old = space.nearby_ids_euclidean(&ContinuousPos::new(1.0, 1.0), 0.5);
    assert!(near_old.contains(&1));

    space
        .move_agent_pos(1, ContinuousPos::new(8.0, 8.0))
        .unwrap();

    let near_old = space.nearby_ids_euclidean(&ContinuousPos::new(1.0, 1.0), 0.5);
    assert!(!near_old.contains(&1));

    let near_new = space.nearby_ids_euclidean(&ContinuousPos::new(8.0, 8.0), 0.5);
    assert!(near_new.contains(&1));
}

#[test]
fn continuous_space_remove() {
    let mut space = ContinuousSpace2D::new(10.0, 10.0, false, 1.0).unwrap();

    let p1 = Particle {
        id: 1,
        pos: ContinuousPos::new(5.0, 5.0),
    };

    use rustsim_core::interaction::SpaceInteraction;
    space.add_agent(&p1).unwrap();
    assert!(!space
        .nearby_ids_euclidean(&ContinuousPos::new(5.0, 5.0), 1.0)
        .is_empty());

    space.remove_agent(&p1).unwrap();
    assert!(space
        .nearby_ids_euclidean(&ContinuousPos::new(5.0, 5.0), 1.0)
        .is_empty());
}

#[test]
fn continuous_pos_2d_arithmetic() {
    let a = ContinuousPos::new(1.0, 2.0);
    let b = ContinuousPos::new(3.0, 5.0);

    let sum = a + b;
    assert!((sum.x - 4.0).abs() < 1e-10);
    assert!((sum.y - 7.0).abs() < 1e-10);

    let diff = b - a;
    assert!((diff.x - 2.0).abs() < 1e-10);
    assert!((diff.y - 3.0).abs() < 1e-10);

    let scaled = a * 3.0;
    assert!((scaled.x - 3.0).abs() < 1e-10);
    assert!((scaled.y - 6.0).abs() < 1e-10);
}

#[test]
fn continuous_pos_2d_length_and_normalized() {
    let v = ContinuousPos::new(3.0, 4.0);
    assert!((v.length() - 5.0).abs() < 1e-10);

    let n = v.normalized();
    assert!((n.length() - 1.0).abs() < 1e-10);
    assert!((n.x - 0.6).abs() < 1e-10);
    assert!((n.y - 0.8).abs() < 1e-10);

    let zero = ContinuousPos::zero();
    let nz = zero.normalized();
    assert!((nz.length()).abs() < 1e-10);
}