plottery_lib 0.7.0

Core geometry library of Plottery, a creative coding framework for generative vector graphics and pen plotting.
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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180

#[cfg(test)]
mod test_normalize {
    use crate::{
        traits::{normalize::Alignment, Normalize},
        BoundingBox, Rect, Translate, V2,
    };

    #[test]
    fn normalize_simple_0() {
        let target = Rect::new(V2::new(1.0, 1.0), V2::new(2.0, 2.0));
        let rect = Rect::new(V2::new(-1.0, -1.0), V2::new(5.0, 5.0));

        // all normalizations should result in the target rectangle
        let normalized = rect
            .normalize(&target, Alignment::Left)
            .unwrap()
            .bounding_box()
            .unwrap();
        assert_eq!(normalized.bl(), target.bl());
        assert_eq!(normalized.tr(), target.tr());

        let normalized = rect
            .normalize(&target, Alignment::Top)
            .unwrap()
            .bounding_box()
            .unwrap();
        assert_eq!(normalized.bl(), target.bl());
        assert_eq!(normalized.tr(), target.tr());

        let normalized = rect
            .normalize(&target, Alignment::Right)
            .unwrap()
            .bounding_box()
            .unwrap();
        assert_eq!(normalized.bl(), target.bl());
        assert_eq!(normalized.tr(), target.tr());

        let normalized = rect
            .normalize(&target, Alignment::Bottom)
            .unwrap()
            .bounding_box()
            .unwrap();
        assert_eq!(normalized.bl(), target.bl());
        assert_eq!(normalized.tr(), target.tr());

        let normalized = rect
            .normalize(&target, Alignment::Center)
            .unwrap()
            .bounding_box()
            .unwrap();
        assert_eq!(normalized.bl(), target.bl());
        assert_eq!(normalized.tr(), target.tr());
    }

    #[test]
    fn normalize_simple_1() {
        let target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let rect = Rect::new(V2::new(0.0, 0.0), V2::new(6.0, 5.0)); // rect ist wider than target
        let normalized = rect.normalize(&target, Alignment::Bottom).unwrap();

        assert_eq!(normalized.bounding_box().unwrap().bl(), target.bl());
        assert_eq!(normalized.bounding_box().unwrap().tr().x, target.tr().x);
        assert_ne!(normalized.bounding_box().unwrap().tr().y, target.tr().y); // result is less high than target
    }

    #[test]
    fn normalize_alignment_tall_shape_left() {
        let target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let rect = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 2.0)); // rect is taller than target
        let normalized = rect.normalize(&target, Alignment::Left).unwrap();
        let normalized_bounds = normalized.bounding_box().unwrap();

        assert_eq!(normalized_bounds.width(), 0.5);
        assert_eq!(normalized_bounds.height(), target.height());
        assert_eq!(normalized_bounds.bl(), V2::new(0.0, 0.0));
        assert_eq!(normalized_bounds.tr(), V2::new(0.5, 1.0));
    }

    #[test]
    fn normalize_alignment_tall_shape_center() {
        let target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let rect = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 2.0));
        let normalized = rect.normalize(&target, Alignment::Center).unwrap();
        let normalized_bounds = normalized.bounding_box().unwrap();

        assert_eq!(normalized_bounds.width(), 0.5);
        assert_eq!(normalized_bounds.height(), target.height());
        assert_eq!(normalized_bounds.bl(), V2::new(0.25, 0.0));
        assert_eq!(normalized_bounds.tr(), V2::new(0.75, 1.0));

        let normalized_bottom_bounds = rect
            .normalize(&target, Alignment::Bottom)
            .unwrap()
            .bounding_box()
            .unwrap();
        let normalized_top_bounds = rect
            .normalize(&target, Alignment::Top)
            .unwrap()
            .bounding_box()
            .unwrap();

        // top and bottom should result in centering the shape, too
        assert_eq!(normalized_bounds.bl(), normalized_bottom_bounds.bl());
        assert_eq!(normalized_bounds.tr(), normalized_bottom_bounds.tr());
        assert_eq!(normalized_bounds.bl(), normalized_top_bounds.bl());
        assert_eq!(normalized_bounds.tr(), normalized_top_bounds.tr());
    }

    #[test]
    fn normalize_alignment_tall_shape_right() {
        let target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let rect = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 2.0));
        let normalized = rect.normalize(&target, Alignment::Right).unwrap();
        let normalized_bounds = normalized.bounding_box().unwrap();

        assert_eq!(normalized_bounds.width(), 0.5);
        assert_eq!(normalized_bounds.height(), target.height());
        assert_eq!(normalized_bounds.bl(), V2::new(0.5, 0.0));
        assert_eq!(normalized_bounds.tr(), V2::new(1.0, 1.0));
    }

    #[test]
    fn noramlize_different_positions() {
        let mut target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let mut rect = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 2.0));

        let target_offset = V2::new(0.1, -20.0);
        let rect_offset = V2::new(-40.0, 10.0);
        target.translate_mut(target_offset);
        rect.translate_mut(rect_offset);

        let normalized = rect.normalize(&target, Alignment::Right).unwrap();
        let mut normalized_bounds = normalized.bounding_box().unwrap();
        normalized_bounds.translate_mut(target_offset * -1.0);

        assert_eq!(normalized_bounds.width(), 0.5);
        assert_eq!(normalized_bounds.height(), target.height());
        assert_eq!(normalized_bounds.bl(), V2::new(0.5, 0.0));
        assert_eq!(normalized_bounds.tr(), V2::new(1.0, 1.0));
    }

    #[test]
    fn normalize_alignment_wide_shape_bottom() {
        let target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let rect = Rect::new(V2::new(0.0, 0.0), V2::new(2.0, 1.0));
        let normalized = rect.normalize(&target, Alignment::Bottom).unwrap();
        let normalized_bounds = normalized.bounding_box().unwrap();

        assert_eq!(normalized_bounds.width(), target.width());
        assert_eq!(normalized_bounds.height(), 0.5);
        assert_eq!(normalized_bounds.bl(), V2::new(0.0, 0.0));
        assert_eq!(normalized_bounds.tr(), V2::new(1.0, 0.5));
    }

    #[test]
    fn normalize_alignment_wide_shape_center() {
        let target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let rect = Rect::new(V2::new(0.0, 0.0), V2::new(2.0, 1.0));
        let normalized = rect.normalize(&target, Alignment::Center).unwrap();
        let normalized_bounds = normalized.bounding_box().unwrap();

        assert_eq!(normalized_bounds.width(), target.width());
        assert_eq!(normalized_bounds.height(), 0.5);
        assert_eq!(normalized_bounds.bl(), V2::new(0.0, 0.25));
        assert_eq!(normalized_bounds.tr(), V2::new(1.0, 0.75));
    }

    #[test]
    fn normalize_alignment_wide_shape_top() {
        let target = Rect::new(V2::new(0.0, 0.0), V2::new(1.0, 1.0));
        let rect = Rect::new(V2::new(0.0, 0.0), V2::new(2.0, 1.0));
        let normalized = rect.normalize(&target, Alignment::Top).unwrap();
        let normalized_bounds = normalized.bounding_box().unwrap();

        assert_eq!(normalized_bounds.width(), target.width());
        assert_eq!(normalized_bounds.height(), 0.5);
        assert_eq!(normalized_bounds.bl(), V2::new(0.0, 0.5));
        assert_eq!(normalized_bounds.tr(), V2::new(1.0, 1.0));
    }
}