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authorEduard-Mihai Burtescu <edy.burt@gmail.com>2017-08-27 12:22:20 +0300
committerGitHub <noreply@github.com>2017-08-27 12:22:20 +0300
commit7922f6e6a55f0aa4ddbf55089131a2981be4a81b (patch)
treecbc3f48cc2669051662781324902f076eabbf806
parent(no commit message) (diff)
downloadheatmap-7922f6e6a55f0aa4ddbf55089131a2981be4a81b.tar.gz
heatmap-7922f6e6a55f0aa4ddbf55089131a2981be4a81b.zip
-rw-r--r--ascii-town-heatmap.rs66
1 files changed, 48 insertions, 18 deletions
diff --git a/ascii-town-heatmap.rs b/ascii-town-heatmap.rs
index 83795ea..23b80da 100644
--- a/ascii-town-heatmap.rs
+++ b/ascii-town-heatmap.rs
@@ -6,6 +6,7 @@ extern crate serde;
#[macro_use]
extern crate serde_derive;
+use std::collections::BTreeSet;
use std::io;
#[derive(Debug, Deserialize)]
@@ -20,43 +21,72 @@ struct Tile {
access_time: u64
}
+// Torus size.
const W: u32 = 512;
+// Tile width/height in pixels.
+const TW: u32 = 4;
+const TH: u32 = 1;
+
fn main() {
+ // Read the `torus.csv` into a 2D array of `(access, modify)`.
+ // Also track the values we see in `BTreeSet` (for ordering).
+ let mut tiles = [[(0, 0); W as usize]; W as usize];
+ let mut sa = BTreeSet::new();
+ let mut sm = BTreeSet::new();
let mut rdr = csv::Reader::from_reader(io::stdin());
- let mut ma = 0.0f32;
- let mut mm = 0.0f32;
- let mut tiles = [[(0.0f32, 0.0f32); W as usize]; W as usize];
for tile in rdr.deserialize().map(Result::<Tile, _>::unwrap) {
- let a = tile.access_count as f32;
- let m = tile.modify_count as f32;
+ let a = tile.access_count;
+ let m = tile.modify_count;
+
+ // HACK(eddyb) ignore 0,0 for analysis - too busy.
if (tile.tile_x, tile.tile_y) != (0, 0) {
- ma = ma.max(a);
- mm = mm.max(m);
+ sa.insert(a);
+ sm.insert(m);
}
+
tiles[tile.tile_y][tile.tile_x] = (a, m);
}
- let mut heatmap = image::ImageBuffer::new(W * 4, W);
- let green = hsl::HSL::from_rgb(&[0, 255, 0]).h;
+ // Extract the maximum values.
+ // TODO(eddyb) chunk values for better representation.
+ let ma = sa.iter().next_back().cloned().unwrap_or(0) as f64;
+ let mm = sm.iter().next_back().cloned().unwrap_or(0) as f64;
+
+ // Compose the heatmap image in-memory from the 2D array.
+ let mut heatmap = image::ImageBuffer::new(W * TW, W * TH);
let red = hsl::HSL::from_rgb(&[255, 0, 0]).h;
+ // let green = hsl::HSL::from_rgb(&[0, 255, 0]).h;
+ // let blue = hsl::HSL::from_rgb(&[0, 0, 255]).h;
for y in 0..W {
for x in 0..W {
let (a, m) = tiles[y as usize][x as usize];
- let a = (a / ma).min(1.0).powf(0.2) as f64;
- let m = (m / mm).min(1.0).powf(0.2) as f64;
+ let a = (a as f64 / ma).min(1.0).powf(0.1);
+ let m = (m as f64 / mm).min(1.0).powf(0.1);
- let l = a.max(m) * 0.5;
- let h = green * (1.0 - m) + red * m;
- let (r, g, b) = hsl::HSL { h, s: 1.0, l }.to_rgb();
+ // access => luminosity, modify => hue (green -> red)
+ // let h = green * (1.0 - m) + red * m;
+ // let s = 1.0;
+ // let l = a.max(m) * 0.5;
+
+ // access => luminosity, modify => saturation (grey -> red)
+ let h = red;
+ let s = m;
+ let l = a * 0.5;
+
+ let (r, g, b) = hsl::HSL { h, s, l }.to_rgb();
let rgb = image::Rgb([r, g, b]);
- let y = (y + W / 2) % W;
- for dx in 0..4 {
- let x = (x * 4 + dx + (W - 1) * 2) % (W * 4);
- heatmap.put_pixel(x, y, rgb);
+ for dy in 0..TH {
+ let y = ((y * 2 + W + 1) * TH / 2 + dy) % (W * TH);
+ for dx in 0..TW {
+ let x = ((x * 2 + W + 1) * TW / 2 + dx) % (W * TW);
+ heatmap.put_pixel(x, y, rgb);
+ }
}
}
}
+
+ // Save the heatmap image.
heatmap.save("heatmap.png").unwrap();
}