adds example of conways game of life

Author: rozgo

Cargo.toml

@@ -71,3 +71,8 @@ path = "examples/histogram.rs"
 [[example]]
 name = "acoustic_wave"
 path = "examples/acoustic_wave.rs"
+
+[[example]]
+name = "conway"
+path = "examples/conway.rs"
+

examples/conway.rs

@@ -0,0 +1,31 @@
+extern crate arrayfire as af;
+
+use af::*;
+
+fn main() {
+    set_device(0);
+    info();
+    conways_game_of_life();
+}
+
+fn normalise(a: &Array<f32>) -> Array<f32> {
+    (a / (max_all(&abs(a)).0 as f32))
+}
+
+fn conways_game_of_life() {
+    let h_kernel = [1.0, 1.0, 1.0, 1.0, 0.0, 1.0, 1.0, 1.0, 1.0];
+    let kernel = Array::new(&h_kernel, Dim4::new(&[3, 3, 1, 1]));
+    let s = constant::<f32>(0.5, Dim4::new(&[1, 1, 1, 1]));
+    let mut state = gt(&randu::<f32>(Dim4::new(&[256, 256, 3, 1])), &s, false);
+    let c0 = constant::<f32>(2.0, Dim4::new(&[1, 1, 1, 1]));
+    let c1 = constant::<f32>(3.0, Dim4::new(&[1, 1, 1, 1]));
+
+    let win = Window::new(512, 512, "Game of Life".to_string());
+    while !win.is_closed() {
+        let n_hood = convolve2(&state, &kernel, ConvMode::DEFAULT, ConvDomain::SPATIAL);
+        let c0 = &eq(&n_hood, &c0, false);
+        let c1 = &eq(&n_hood, &c1, false);
+        state = state * c0 + c1;
+        win.draw_image(&normalise(&state), None);
+    }
+}