argui-animation 0.2.1

Animation timing and interpolation for Argui interfaces
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

use argui_core::{Color, Point, Rect, Size, Transform2D};

#[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
pub enum Composition {
    #[default]
    Replace,
    Add,
    Accumulate,
}

#[derive(Clone, Copy, Debug, PartialEq)]
pub struct Contribution<T> {
    pub value: T,
    pub composition: Composition,
    pub priority: i32,
    pub order: u64,
    pub completed_iterations: u64,
}

impl<T> Contribution<T> {
    #[must_use]
    pub const fn replace(value: T, priority: i32, order: u64) -> Self {
        Self {
            value,
            composition: Composition::Replace,
            priority,
            order,
            completed_iterations: 0,
        }
    }
}

pub trait Compose: Copy {
    fn add(self, contribution: Self) -> Self;

    fn scale(self, factor: f32) -> Self;
}

#[must_use]
pub fn compose<T: Compose>(base: T, contributions: &mut [Contribution<T>]) -> T {
    contributions.sort_by_key(|item| (item.priority, item.order));
    contributions
        .iter()
        .fold(base, |value, contribution| match contribution.composition {
            Composition::Replace => contribution.value,
            Composition::Add => value.add(contribution.value),
            Composition::Accumulate => value.add(
                contribution
                    .value
                    .scale(contribution.completed_iterations as f32 + 1.0),
            ),
        })
}

impl Compose for f32 {
    fn add(self, contribution: Self) -> Self {
        self + contribution
    }

    fn scale(self, factor: f32) -> Self {
        self * factor
    }
}

impl Compose for f64 {
    fn add(self, contribution: Self) -> Self {
        self + contribution
    }

    fn scale(self, factor: f32) -> Self {
        self * f64::from(factor)
    }
}

impl<const N: usize> Compose for [f32; N] {
    fn add(mut self, contribution: Self) -> Self {
        for (value, contribution) in self.iter_mut().zip(contribution) {
            *value += contribution;
        }
        self
    }

    fn scale(mut self, factor: f32) -> Self {
        for value in &mut self {
            *value *= factor;
        }
        self
    }
}

impl Compose for Color {
    fn add(self, contribution: Self) -> Self {
        let left = self.to_linear_rgba();
        let right = contribution.to_linear_rgba();
        Self::linear_rgba(
            left[0] + right[0],
            left[1] + right[1],
            left[2] + right[2],
            left[3] + right[3],
        )
    }

    fn scale(self, factor: f32) -> Self {
        let value = self.to_linear_rgba();
        Self::linear_rgba(
            value[0] * factor,
            value[1] * factor,
            value[2] * factor,
            value[3] * factor,
        )
    }
}

impl Compose for Point {
    fn add(self, contribution: Self) -> Self {
        Self::new(self.x + contribution.x, self.y + contribution.y)
    }

    fn scale(self, factor: f32) -> Self {
        Self::new(self.x * factor, self.y * factor)
    }
}

impl Compose for Size {
    fn add(self, contribution: Self) -> Self {
        Self::new(
            self.width + contribution.width,
            self.height + contribution.height,
        )
    }

    fn scale(self, factor: f32) -> Self {
        Self::new(self.width * factor, self.height * factor)
    }
}

impl Compose for Rect {
    fn add(self, contribution: Self) -> Self {
        Self::new(
            self.origin.add(contribution.origin),
            self.size.add(contribution.size),
        )
    }

    fn scale(self, factor: f32) -> Self {
        Self::new(self.origin.scale(factor), self.size.scale(factor))
    }
}

impl Compose for Transform2D {
    fn add(self, contribution: Self) -> Self {
        Self {
            translation: self.translation.add(contribution.translation),
            scale: self.scale.add(contribution.scale),
            rotation: self.rotation + contribution.rotation,
            skew: self.skew.add(contribution.skew),
        }
    }

    fn scale(self, factor: f32) -> Self {
        Self {
            translation: self.translation.scale(factor),
            scale: self.scale.scale(factor),
            rotation: self.rotation * factor,
            skew: self.skew.scale(factor),
        }
    }
}