Merge branch 'master' of rosencrantz:/srv/git/axidraw-experiments

Cargo.toml

@@ -27,3 +27,7 @@ path = "src/sunburst.rs"
 [[bin]]
 name = "planets"
 path = "src/planets.rs"
+
+[[bin]]
+name = "space"
+path = "src/space.rs"

src/circles.rs

@@ -5,11 +5,11 @@ extern crate rand;
 fn main() {
     let mut drawing = gt::svg(8.5, 11.0);
 
-    for y in 1..=10 {
+    for y in 1..11 {
         drawing.add(gt::line(0.75, y as f64)
                     .to(8.5 - 0.75, y as f64));
     }
-    for x in 0..=7 {
+    for x in 0..8 {
         drawing.add(gt::line(0.75 + x as f64, 1.0)
                     .to(0.75 + x as f64, 10.0));
     }

src/space.rs

@@ -0,0 +1,61 @@
+extern crate gunpowder_treason as gt;
+#[macro_use] extern crate itertools;
+extern crate rand;
+
+use std::collections::HashSet;
+use rand::Rng;
+
+fn main() {
+    let (w, h) = (11.0, 14.0);
+    let mut drawing = gt::svg(w, h);
+    drawing.add(gt::rect((0.0, 0.0), (11.0, 14.0)));
+
+    let mut rng = rand::thread_rng();
+    let per_inch = 5.0;
+
+    let mut points: HashSet<(usize, usize)> = iproduct!(
+        per_inch as usize .. per_inch as usize * 10,
+        per_inch as usize .. per_inch as usize * 13
+    ).collect();
+    let mut src: Vec<(usize, usize)> = points.clone().into_iter().collect();
+    rng.shuffle(&mut src);
+
+
+    while let Some((ox, oy)) = src.pop() {
+        let mut x = ox;
+        let mut y = oy;
+        if !points.remove(&(x, y)) { continue; }
+        let mut total_points = 1usize;
+        let mut line = gt::line(x as f64 / per_inch, y as f64 / per_inch);
+        'find_next: loop {
+            let mut neighbors = vec![
+                (x - 1, y),
+                (x + 1, y),
+                (x, y - 1),
+                (x, y + 1),
+                (x, y - 1),
+                (x, y + 1),
+                (x, y - 1),
+                (x, y + 1),
+            ];
+            rng.shuffle(&mut neighbors);
+            'check_neighbors: for &(xn, yn) in neighbors.iter() {
+                if points.remove(&(xn, yn)) {
+                    total_points += 1;
+                    line = line.to(xn as f64 / per_inch, yn as f64 / per_inch);
+                    x = xn;
+                    y = yn;
+                    continue 'find_next;
+                }
+            }
+            break 'find_next;
+        }
+        if total_points > 3 {
+            drawing.add(gt::circle((ox as f64 / per_inch, oy as f64 / per_inch), 0.02));
+            drawing.add(gt::circle((x as f64 / per_inch, y as f64 / per_inch), 0.02));
+            drawing.add(line);
+        }
+    }
+
+    drawing.to_stdout();
+}