include rust

src/lib.rs

@@ -0,0 +1,43 @@
+use wasm_bindgen::prelude::*;
+
+#[cfg(feature = "wee_alloc")]
+#[global_allocator]
+static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+
+pub fn set_panic_hook() {
+    #[cfg(feature = "console_error_panic_hook")]
+    console_error_panic_hook::set_once();
+}
+
+#[wasm_bindgen]
+pub struct Universe {
+    width: u32,
+    height: u32,
+    field: Vec<u8>,
+}
+
+#[wasm_bindgen]
+impl Universe {
+    pub fn new(width: u32, height: u32) -> Self {
+        set_panic_hook();
+
+        Universe {
+            width,
+            height,
+            field: vec![0u8; width as usize * height as usize],
+        }
+    }
+
+    pub fn set_something(&mut self) {
+        for j in 0..self.height {
+            for i in 0..self.width {
+                self.field[(self.width * j + i) as usize] =
+                    ((10 * i + 100 * j) % (u8::max_value() as u32)) as u8;
+            }
+        }
+    }
+
+    pub fn get_field(&mut self) -> *mut u8 {
+        self.field.as_mut_ptr()
+    }
+}