photonic 0.1.1

Dynamic light controller and animator
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

use std::collections::VecDeque;
use std::time::Duration;

pub fn combine_opts<V, F>(v1: Option<V>, v2: Option<V>, f: F) -> Option<V>
where F: FnOnce(V, V) -> V {
    match (v1, v2) {
        (Some(v1), Some(v2)) => Some(f(v1, v2)),
        (Some(v1), None) => Some(v1),
        (None, Some(v2)) => Some(v2),
        (None, None) => None,
    }
}

#[derive(Debug, Clone)]
pub struct FrameStats {
    cycles: usize,

    min_time: Duration,
    max_time: Duration,
    sum_time: Duration,
}

impl FrameStats {
    pub fn update(&mut self, duration: Duration) {
        self.cycles += 1;
        self.sum_time += duration;
        self.min_time = Duration::min(self.min_time, duration);
        self.max_time = Duration::max(self.max_time, duration);
    }

    pub fn reset(&mut self, reset_cycles: usize) -> Option<Self> {
        if self.cycles >= reset_cycles {
            let old = self.clone();

            self.cycles = 0;
            self.sum_time = Duration::new(0, 0);
            self.min_time = Duration::new(u64::MAX, 0);
            self.max_time = Duration::new(u64::MIN, 0);

            return Some(old);
        } else {
            return None;
        }
    }

    pub fn cycles(&self) -> usize {
        self.cycles
    }

    pub fn min_time(&self) -> Duration {
        self.min_time
    }

    pub fn max_time(&self) -> Duration {
        self.max_time
    }

    pub fn min_fps(&self) -> f64 {
        return 1.0f64 / self.max_time.as_secs_f64();
    }

    pub fn max_fps(&self) -> f64 {
        return 1.0f64 / self.min_time.as_secs_f64();
    }

    pub fn avg_fps(&self) -> f64 {
        return 1.0f64 / (self.sum_time.as_secs_f64() / self.cycles as f64);
    }
}

impl Default for FrameStats {
    fn default() -> Self {
        return Self {
            cycles: 0,
            sum_time: Duration::new(0, 0),
            min_time: Duration::new(u64::MAX, 0),
            max_time: Duration::new(u64::MIN, 0),
        };
    }
}

#[derive(Debug)]
pub struct FrameTimer {
    ticker: tokio::time::Interval,

    frame_last: tokio::time::Instant,
    frame_curr: tokio::time::Instant,
}

impl FrameTimer {
    pub fn new(fps: usize) -> Self {
        let frame_time = Duration::from_secs(1) / fps as u32;

        let start = tokio::time::Instant::now();

        Self {
            ticker: tokio::time::interval_at(start, frame_time),
            frame_last: start,
            frame_curr: start,
        }
    }

    pub async fn tick(&mut self) -> Duration {
        // Sleep until it's time to render next frame
        let now = self.ticker.tick().await;

        // Remember current and previous frame start time
        self.frame_last = self.frame_curr;
        self.frame_curr = now;

        // Calculate differences between previous and current frame star times
        let duration = self.frame_curr - self.frame_last;

        return duration;
    }
}

pub struct TreeIterator<'a, T, F, I>
where
    T: 'a,
    F: Fn(&'a T) -> I,
    I: Iterator<Item = &'a T>,
{
    sprawl: F,
    queue: VecDeque<&'a T>,
}

impl<'a, T, F, I> TreeIterator<'a, T, F, I>
where
    F: Fn(&'a T) -> I,
    I: Iterator<Item = &'a T>,
{
    pub fn new(t: &'a T, sprawl: F) -> Self {
        return Self {
            sprawl,
            queue: VecDeque::from([t]),
        };
    }
}

impl<'a, T, F, I> Iterator for TreeIterator<'a, T, F, I>
where
    F: Fn(&'a T) -> I,
    I: Iterator<Item = &'a T>,
{
    type Item = &'a T;

    #[inline]
    fn next(&mut self) -> Option<Self::Item> {
        if let Some(t) = self.queue.pop_front() {
            self.queue.extend((self.sprawl)(t));
            return Some(t);
        } else {
            return None;
        }
    }
}