spine2d 0.3.0

Pure Rust runtime for Spine 4.3 (unofficial)
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

use crate::SkeletonData;

#[test]
fn json_physics_constraint_defaults_match_spine_cpp() {
    let json = r#"
{
  "skeleton": { "spine": "4.3.00" },
  "bones": [{ "name": "root" }],
  "slots": [],
  "constraints": [
    { "name": "p0", "type": "physics", "bone": "root" }
  ]
}
"#;

    let data = SkeletonData::from_json_str(json).expect("parse skeleton json");
    let c = data
        .physics_constraints
        .first()
        .expect("physics constraint");

    assert_eq!(c.inertia, 0.5);
    assert_eq!(c.strength, 100.0);
    assert_eq!(c.damping, 0.85);
    assert_eq!(c.mass_inverse, 1.0);
    assert_eq!(c.wind, 0.0);
    assert_eq!(c.gravity, 0.0);
    assert_eq!(c.mix, 1.0);
    assert_eq!(c.limit, 5000.0);
    assert!((c.step - (1.0 / 60.0)).abs() <= 1.0e-6);
}

#[test]
fn json_ik_scale_y_mode_matches_spine_cpp() {
    let json = r#"
{
  "skeleton": { "spine": "4.3.00" },
  "bones": [
    { "name": "root" },
    { "name": "bone", "parent": "root", "length": 10 },
    { "name": "target", "parent": "root", "x": 20 }
  ],
  "slots": [],
  "constraints": [
    { "name": "ik_default", "type": "ik", "bones": ["bone"], "target": "target" },
    { "name": "ik_uniform", "type": "ik", "bones": ["bone"], "target": "target", "scaleY": "uniform" },
    { "name": "ik_volume", "type": "ik", "bones": ["bone"], "target": "target", "scaleY": "volume" },
    { "name": "physics_scale_x", "type": "physics", "bone": "bone", "scaleX": 0.5, "scaleY": "uniform" }
  ]
}
"#;

    let data = SkeletonData::from_json_str(json).expect("parse skeleton json");

    assert_eq!(data.ik_constraints[0].scale_y_mode, crate::ScaleYMode::None);
    assert_eq!(
        data.ik_constraints[1].scale_y_mode,
        crate::ScaleYMode::Uniform
    );
    assert_eq!(
        data.ik_constraints[2].scale_y_mode,
        crate::ScaleYMode::Volume
    );
    assert_eq!(data.physics_constraints[0].scale_x, 0.5);
    assert_eq!(
        data.physics_constraints[0].scale_y_mode,
        crate::ScaleYMode::Uniform
    );
}

#[test]
fn json_bone_and_slot_nonessential_fields_are_preserved() {
    let json = r#"
{
  "skeleton": { "spine": "4.3.00" },
  "bones": [
    {
      "name": "root",
      "color": "11223344",
      "icon": "root-icon",
      "iconSize": 2.5,
      "iconRotation": 45,
      "visible": false
    }
  ],
  "slots": [
    { "name": "slot0", "bone": "root", "visible": false }
  ],
  "animations": {}
}
"#;

    let data = SkeletonData::from_json_str(json).expect("parse skeleton json");
    let bone = &data.bones[0];
    assert_eq!(
        bone.color,
        [
            0x11 as f32 / 255.0,
            0x22 as f32 / 255.0,
            0x33 as f32 / 255.0,
            0x44 as f32 / 255.0
        ]
    );
    assert_eq!(bone.icon, "root-icon");
    assert_eq!(bone.icon_size, 2.5);
    assert_eq!(bone.icon_rotation, 45.0);
    assert!(!bone.visible);
    assert!(!data.slots[0].visible);
}

#[test]
fn json_clipping_flags_parse_convex_and_inverse() {
    let json = r#"
{
  "skeleton": { "spine": "4.3.00" },
  "bones": [{ "name": "root" }],
  "slots": [
    { "name": "clip", "bone": "root", "attachment": "clip" },
    { "name": "end", "bone": "root" }
  ],
  "skins": {
    "default": {
      "clip": {
        "clip": {
          "type": "clipping",
          "end": "end",
          "convex": true,
          "inverse": true,
          "vertexCount": 3,
          "vertices": [0,0, 10,0, 0,10]
        }
      }
    }
  }
}
"#;

    let data = SkeletonData::from_json_str(json).expect("parse skeleton json");
    let clip = data
        .skin("default")
        .and_then(|skin| skin.attachment(0, "clip"))
        .and_then(|attachment| match attachment {
            crate::AttachmentData::Clipping(clip) => Some(clip),
            _ => None,
        })
        .expect("clipping attachment");

    assert_eq!(clip.end_slot, Some(1));
    assert!(clip.convex);
    assert!(clip.inverse);
}