tomodoro 0.4.0

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
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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244

use super::*;

fn draw_fireplace(buf: &mut PixBuf, pw: usize, ph: usize) {
    let side_w   = (pw * 19 / 100).max(4);
    let mantel_h = (ph * 11 / 100).max(2);
    let hearth_y = ph.saturating_sub((ph * 9 / 100).max(2));
    let fire_x0  = side_w;
    let fire_x1  = pw.saturating_sub(side_w);

    let mortar   = Color::Rgb(52, 47, 42);

    let brick_h = (ph / 18).max(2);
    let brick_w = (side_w / 3).max(3);

    // Brick columns
    for side in 0..2usize {
        let xs = if side == 0 { 0 } else { pw.saturating_sub(side_w) };
        for py in mantel_h..hearth_y {
            for ppx in xs..(xs + side_w).min(pw) {
                let row  = (py - mantel_h) / brick_h;
                let off  = if row % 2 == 0 { 0 } else { brick_w / 2 };
                let col_b = (ppx - xs + off) % brick_w;
                let row_b = (py - mantel_h) % brick_h;
                let v = hash(((row * 13 + (ppx - xs + off) / brick_w) as u64).wrapping_add(77));
                let c = if row_b == 0 || col_b == 0 {
                    mortar
                } else if row_b == 1 {
                    // shadow just below mortar joint
                    Color::Rgb(
                        90u8.saturating_add((v % 15) as u8),
                        45u8.saturating_add(((v >> 4) % 10) as u8),
                        30u8.saturating_add(((v >> 8) % 8) as u8),
                    )
                } else {
                    Color::Rgb(
                        135u8.saturating_add((v % 25) as u8),
                        72u8.saturating_add(((v >> 4) % 18) as u8),
                        52u8.saturating_add(((v >> 8) % 14) as u8),
                    )
                };
                if py < buf.len() && ppx < buf[0].len() { buf[py][ppx] = Some(c); }
            }
        }
    }

    // Mantelpiece — warm oak wood grain
    for py in 0..mantel_h {
        for ppx in 0..pw {
            if py >= buf.len() || ppx >= buf[0].len() { continue; }
            let grain = hash((ppx as u64 / 2).wrapping_add((py as u64 * 3).wrapping_mul(17)));
            let grain_line = (py * pw + ppx / 3) % 7 == 0;
            let (r, g, b) = if py == mantel_h - 1 {
                (52u8, 31u8, 12u8)  // dark underside shadow
            } else if grain_line {
                (72u8.saturating_add((grain % 10) as u8), 43u8.saturating_add((grain % 8) as u8), 16u8.saturating_add((grain % 5) as u8))
            } else {
                (88u8.saturating_add((grain % 18) as u8), 54u8.saturating_add((grain % 13) as u8), 22u8.saturating_add((grain % 9) as u8))
            };
            buf[py][ppx] = Some(Color::Rgb(r, g, b));
        }
    }

    // Hearth floor — stone flags outside, carpet in centre
    let carpet_x0 = fire_x0.saturating_sub(fire_x0 / 3);
    let carpet_x1 = (fire_x1 + (pw - fire_x1) / 3).min(pw);
    for py in hearth_y..ph {
        for ppx in 0..pw {
            if py >= buf.len() || ppx >= buf[0].len() { continue; }
            let on_carpet = ppx >= carpet_x0 && ppx < carpet_x1;
            if on_carpet {
                let cx = ppx - carpet_x0;
                let cy = py - hearth_y;
                let cw = carpet_x1 - carpet_x0;
                let ch = ph - hearth_y;
                let border = cx == 0 || cx == cw.saturating_sub(1) || cy == 0 || cy == ch.saturating_sub(1);
                let inner_border = cx == 2 || cx == cw.saturating_sub(3) || cy == 2 || cy == ch.saturating_sub(3);
                let v = hash(ppx as u64 * 7 + py as u64 * 13 + 8888);
                let noise = (v % 12) as u8;
                buf[py][ppx] = Some(if border || inner_border {
                    Color::Rgb(130u8.saturating_add(noise / 2), 40u8.saturating_add(noise / 4), 18u8.saturating_add(noise / 4))
                } else {
                    Color::Rgb(105u8.saturating_add(noise), 28u8.saturating_add(noise / 3), 18u8.saturating_add(noise / 3))
                });
            } else {
                let v = hash(((ppx / 5) as u64).wrapping_add((py * 53) as u64));
                buf[py][ppx] = Some(Color::Rgb(
                    78u8.saturating_add((v % 18) as u8),
                    76u8.saturating_add(((v >> 4) % 14) as u8),
                    72u8.saturating_add(((v >> 8) % 11) as u8),
                ));
            }
        }
    }

    // Logs — two overlapping logs sitting at the base of the fire
    let log_h  = (ph * 5 / 100).max(2);
    let log_y0 = hearth_y.saturating_sub(log_h + 1);
    let fire_w = fire_x1 - fire_x0;
    let log_hw = fire_w / 2;
    let logs: &[(isize, u8, u8, u8)] = &[
        (fire_x0 as isize + fire_w as isize / 3,     58, 32, 12),
        (fire_x0 as isize + fire_w as isize * 2 / 3, 48, 26, 10),
    ];
    for &(cx, lr, lg, lb) in logs {
        for dy in 0..log_h {
            let py = log_y0 + dy;
            if py >= ph { continue; }
            let ry = dy as f64 / log_h as f64;
            let half_w = (log_hw as f64 * (1.0 - (ry * 2.0 - 1.0).powi(2)).sqrt()) as isize;
            for dx in -half_w..=half_w {
                let px = cx + dx;
                if px < fire_x0 as isize || px as usize >= fire_x1 { continue; }
                let v = hash(px as u64 * 5 + py as u64 * 11 + 3030);
                let bark = (v % 3 == 0) as u8 * 12;
                let ember = if dy == 0 { 30u8 } else { 0u8 };
                buf[py][px as usize] = Some(Color::Rgb(
                    lr.saturating_add(bark).saturating_add(ember),
                    lg.saturating_add(bark / 2),
                    lb.saturating_add(bark / 3),
                ));
            }
        }
    }

    // Iron grate — vertical bars across lower portion of fire opening
    let grate_h  = (ph * 10 / 100).max(3);
    let grate_y0 = hearth_y.saturating_sub(grate_h);
    let bar_w    = 1usize;
    let gap_w    = (fire_x1 - fire_x0) / 10;
    let gap_w    = gap_w.max(2);
    let iron_hi  = Color::Rgb(48, 45, 42);
    let iron_dk  = Color::Rgb(22, 20, 18);
    // horizontal rail at top and bottom of grate
    for ppx in fire_x0..fire_x1 {
        if grate_y0 < buf.len() { buf[grate_y0][ppx] = Some(iron_hi); }
        if hearth_y < buf.len() && hearth_y < ph { buf[hearth_y.min(ph-1)][ppx] = Some(iron_dk); }
    }
    // vertical bars
    let mut bx = fire_x0 + gap_w / 2;
    while bx + bar_w <= fire_x1 {
        for py in grate_y0..hearth_y {
            if py >= buf.len() { continue; }
            for dx in 0..bar_w {
                let px = bx + dx;
                if px < buf[0].len() {
                    buf[py][px] = Some(if dx == 0 { iron_hi } else { iron_dk });
                }
            }
        }
        bx += gap_w;
    }
}

pub(super) fn fill_fire(buf: &mut PixBuf, pw: usize, ph: usize, tick: u64) {
    let side_w   = (pw * 19 / 100).max(4);
    let mantel_h = (ph * 11 / 100).max(2);
    let hearth_y = ph.saturating_sub((ph * 9 / 100).max(2));
    let fire_x0  = side_w;
    let fire_x1  = pw.saturating_sub(side_w);
    let fire_pw  = fire_x1.saturating_sub(fire_x0);
    let fire_ph  = hearth_y.saturating_sub(mantel_h);

    // Dark room background
    for py in 0..ph { for ppx in 0..pw { buf[py][ppx] = Some(Color::Rgb(5, 4, 3)); } }

    // Back wall of fireplace — soot-stained, darker than room to push it back
    for py in mantel_h..hearth_y {
        for ppx in fire_x0..fire_x1 {
            let v = hash(ppx as u64 * 3 + py as u64 * 7 + 999);
            buf[py][ppx] = Some(Color::Rgb(
                11u8.saturating_add((v % 4) as u8),
                9u8.saturating_add(((v >> 4) % 3) as u8),
                8u8.saturating_add(((v >> 8) % 3) as u8),
            ));
        }
    }

    // Fire — hash-based crackle: each column flickers independently, no sine sweep
    let crackle_t = tick / 4;
    let blend_f   = (tick % 4) as f64 / 4.0;
    for ppx in fire_x0..fire_x1 {
        let local_x = ppx - fire_x0;
        let cx      = (local_x as f64 - fire_pw as f64 / 2.0).abs() / (fire_pw as f64 / 2.0);
        let arch    = (1.0 - cx * 0.65).max(0.0);

        // Current and next crackle state blended — independent per column
        let ha = hash(ppx as u64 * 11 + crackle_t * 37 + 101);
        let hb = hash(ppx as u64 * 11 + (crackle_t + 1) * 37 + 101);
        let ca = (ha % 100) as f64 / 100.0 * 0.30 - 0.09;
        let cb = (hb % 100) as f64 / 100.0 * 0.30 - 0.09;
        // Slight neighbour influence so adjacent columns aren't totally unrelated
        let hn = hash((ppx as u64 + 1) * 11 + crackle_t * 37 + 101);
        let cn = (hn % 100) as f64 / 100.0 * 0.30 - 0.09;
        let crackle = (ca * (1.0 - blend_f) + cb * blend_f) * 0.75 + cn * 0.25;

        let height = ((arch + crackle).clamp(0.1, 1.0) * 0.58 * fire_ph as f64) as usize;
        let top    = hearth_y.saturating_sub(height);

        for py in top..hearth_y {
            let f = (py - top) as f64 / height.max(1) as f64;
            buf[py][ppx] = Some(
                if f < 0.20 { let v = f/0.20; Color::Rgb(255, (210.0*v+45.0) as u8, (90.0*(1.0-v)) as u8) }
                else if f < 0.60 { let v = (f-0.20)/0.40; Color::Rgb(255, (45.0*(1.0-v)) as u8, 0) }
                else { Color::Rgb(((1.0-(f-0.60)/0.40)*240.0).max(0.0) as u8, 0, 0) }
            );
        }
    }

    // Sparks — brief bright pixels near flame tips
    let n_sparks = (fire_pw / 2).max(3);
    for i in 0..n_sparks {
        let hs = hash(i as u64 * 17 + tick / 5 * 31 + 555);
        if hs % 4 != 0 { continue; }
        let sx = fire_x0 + (hs >> 10) as usize % fire_pw;
        let sy = mantel_h + (hs >> 20) as usize % (fire_ph * 2 / 5);
        set_px(buf, sx as isize, sy as isize, match (hs >> 5) % 3 {
            0 => Color::Rgb(255, 210, 60),
            1 => Color::Rgb(255, 150, 25),
            _ => Color::Rgb(255, 255, 190),
        });
    }

    // Depth — shadow gradient at inner edges of opening, simulating column thickness
    let shadow_w = (fire_pw / 6).max(3);
    for py in mantel_h..hearth_y {
        for dx in 0..shadow_w {
            let alpha = (1.0 - dx as f64 / shadow_w as f64) * 0.78;
            for &px in &[fire_x0 + dx, fire_x1.saturating_sub(1 + dx)] {
                if px < buf[0].len() {
                    if let Some(Color::Rgb(r, g, b)) = buf[py][px] {
                        buf[py][px] = Some(Color::Rgb(
                            (r as f64 * (1.0 - alpha)) as u8,
                            (g as f64 * (1.0 - alpha)) as u8,
                            (b as f64 * (1.0 - alpha)) as u8,
                        ));
                    }
                }
            }
        }
    }

    // Fireplace structure drawn on top
    draw_fireplace(buf, pw, ph);
}