tomodoro 0.5.2

Terminal Pomodoro timer with animated backgrounds
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

use super::*;

fn draw_snow_landscape(buf: &mut PixBuf, pw: usize, ph: usize) {
    let base_ground = ph * 84 / 100;
    let pi = std::f64::consts::PI;

    // Per-column ground height — gentle rolling hills
    let ground_at = |ppx: usize| -> usize {
        let xf = ppx as f64 / pw as f64;
        let h1 = ((xf * pi * 2.3).sin() * 0.5 + 0.5) * ph as f64 * 0.035;
        let h2 = ((xf * pi * 4.7 + 0.8).sin() * 0.5 + 0.5) * ph as f64 * 0.018;
        let noise = (hash(ppx as u64 * 17 + 333) % 4) as f64;
        ((base_ground as f64) - h1 - h2 - noise).max(0.0) as usize
    };

    // Helper: draw a mountain range with gradient base
    let draw_range = |buf: &mut PixBuf, base: usize, amp1: f64, freq1: f64, phase1: f64,
                                                       amp2: f64, freq2: f64, phase2: f64,
                      rock: (u8,u8,u8), snow_frac: f64| {
        for ppx in 0..pw {
            let xf  = ppx as f64 / pw as f64;
            let h1  = ((xf * pi * freq1 + phase1).sin() * 0.5 + 0.5) * ph as f64 * amp1;
            let h2  = ((xf * pi * freq2 + phase2).sin() * 0.5 + 0.5) * ph as f64 * amp2;
            let ht  = (h1 + h2) as usize;
            if ht == 0 { continue; }

            // Per-column noise on the base — breaks up the hard horizontal edge
            let base_noise = (hash(ppx as u64 * 13 + base as u64 * 7 + 444) % 7) as usize;
            let base_y  = (base + base_noise).min(ph);
            let top     = base_y.saturating_sub(ht);
            let snow_ln = top + (ht as f64 * snow_frac) as usize;
            let fade_h  = ((ht / 5) + 3).min(ht);
            let fade_y  = base_y.saturating_sub(fade_h);

            for py in top..base_y {
                if py >= buf.len() || ppx >= buf[0].len() { continue; }
                let noise = (hash(ppx as u64 * 5 + py as u64 * 9 + 1234) % 6) as f64 * 0.5;
                buf[py][ppx] = Some(if py < snow_ln {
                    let b = (py - top) as f64 / (snow_ln - top).max(1) as f64;
                    Color::Rgb((220.0 - b*25.0 + noise) as u8, (232.0 - b*22.0 + noise) as u8, (248.0 - b*14.0) as u8)
                } else if py < fade_y {
                    Color::Rgb(
                        (rock.0 as f64 + noise) as u8,
                        (rock.1 as f64 + noise) as u8,
                        (rock.2 as f64 + noise) as u8,
                    )
                } else {
                    // Gradient: rock → snow colour, with per-pixel noise for rough edge
                    let f = (py - fade_y) as f64 / fade_h as f64;
                    let n2 = (hash(ppx as u64 * 3 + py as u64 * 17 + 5678) % 10) as f64;
                    Color::Rgb(
                        (rock.0 as f64 + f * (190.0 - rock.0 as f64) + n2) as u8,
                        (rock.1 as f64 + f * (205.0 - rock.1 as f64) + n2) as u8,
                        (rock.2 as f64 + f * (222.0 - rock.2 as f64) + n2) as u8,
                    )
                });
            }
        }
    };

    // Distant range — more snow, lighter rock
    draw_range(buf, ph * 76 / 100, 0.14, 2.2, 0.0, 0.06, 4.3, 0.8, (22, 28, 48), 0.52);
    // Close range — more snow, heavier mountains
    draw_range(buf, base_ground,   0.24, 1.5, 0.5, 0.10, 3.1, 1.3, (8, 11, 20),  0.40);

    // Snow ground — per-column hill height
    for ppx in 0..pw {
        let gy = ground_at(ppx);
        for py in gy..ph {
            if py >= buf.len() || ppx >= buf[0].len() { continue; }
            let depth    = (py - gy) as f64 / (ph - gy).max(1) as f64;
            let aurora_t = (1.0 - depth) * 16.0;
            let v        = hash((ppx as u64 * 5).wrapping_add(py as u64 * 13).wrapping_add(9999));
            let noise    = (v % 6) as f64 * 0.5;
            let bright   = 182.0 + depth * 22.0;
            buf[py][ppx] = Some(Color::Rgb(
                (bright + noise) as u8,
                (bright + aurora_t + noise) as u8,
                (bright + aurora_t * 1.6 + noise + 10.0).min(255.0) as u8,
            ));
        }
    }
}

pub(super) fn fill_aurora(buf: &mut PixBuf, pw: usize, ph: usize, tick: u64) {
    let t = tick as f64 * 0.04;
    for py in 0..ph {
        for ppx in 0..pw {
            let frac = py as f64 / ph as f64;
            buf[py][ppx] = Some(Color::Rgb((3.0+frac*5.0) as u8, (5.0+frac*8.0) as u8, (15.0+frac*20.0) as u8));
        }
    }
    let aurora_h = ph * 7 / 10;
    let band_colors: [(u8,u8,u8); 4] = [(20,200,120),(40,180,220),(100,60,220),(20,220,160)];
    for ppx in 0..pw {
        let x = ppx as f64 / pw as f64;
        for band in 0..4u32 {
            let b = band as f64;
            let cx = (b * 0.27 + t * (0.3 + b * 0.1)).sin() * 0.5 + 0.5;
            let width = 0.12 + (t * 0.07 + b).sin() * 0.05;
            let dist = (x - cx).abs();
            if dist < width {
                let intensity = (1.0 - dist / width).powi(2);
                let band_h = (aurora_h as f64 * (0.4 + intensity * 0.5)) as usize;
                let bottom_f = aurora_h as f64
                    + (b * 1.7 + t * 0.05).sin()               * ph as f64 * 0.10
                    + (ppx as f64 * 0.03 + t * 0.18 + b * 2.1).sin() * ph as f64 * 0.07
                    + (ppx as f64 * 0.09 + t * 0.31 + b * 0.9).sin() * ph as f64 * 0.04
                    + (ppx as f64 * 0.23 + t * 0.14 + b * 3.3).sin() * ph as f64 * 0.02;
                let bottom = (bottom_f as isize).clamp(0, ph as isize) as usize;
                let top = bottom.saturating_sub(band_h);
                let (r, g, bl) = band_colors[band as usize % band_colors.len()];
                for py in top..bottom.min(ph) {
                    let depth = if band_h > 0 { (py - top) as f64 / band_h as f64 } else { 0.0 };
                    let alpha = intensity * (1.0 - depth * 0.7);
                    let existing = buf[py][ppx];
                    let (er, eg, eb) = match existing {
                        Some(Color::Rgb(a, b, c)) => (a as f64, b as f64, c as f64),
                        _ => (0.0, 0.0, 0.0),
                    };
                    buf[py][ppx] = Some(Color::Rgb(
                        (er + r as f64 * alpha).min(255.0) as u8,
                        (eg + g as f64 * alpha).min(255.0) as u8,
                        (eb + bl as f64 * alpha).min(255.0) as u8,
                    ));
                }
            }
        }
    }
    for i in 0..(pw * ph / 60).max(5) {
        let seed = hash(i as u64 + 5555);
        let sx = (seed % pw as u64) as usize;
        let sy = (seed >> 8) as usize % (ph / 2).max(1);
        let tw = ((tick as f64 * 0.1 + i as f64 * 1.3).sin() * 0.4 + 0.6) * 160.0;
        let v = tw as u8;
        if let Some(Color::Rgb(er, eg, eb)) = buf[sy][sx] {
            if (er as u16 + eg as u16 + eb as u16) < 150 {
                buf[sy][sx] = Some(Color::Rgb(v, v, v));
            }
        }
    }
    draw_snow_landscape(buf, pw, ph);
}