Move Runic client code to engine repo

client.js

@@ -0,0 +1,50 @@
+var canvas;
+var canvas_center = new vector(0, 0);
+var mouse_position = new vector(0, 0);
+var camera = new vector(0, 0);
+var lastupdate = Date.now();
+
+function load_image(path) {
+  let image = new Image();
+  image.src = path;
+  return image;
+}
+
+function global_to_canvas(pos) {
+	let tempx = -camera.x + pos.x + canvas_center.x;
+	let tempy = -camera.y + pos.y + canvas_center.y;
+	return new vector(tempx, tempy);
+}
+
+function resize_canvas() {
+  canvas.width = window.innerWidth;
+  canvas.height = window.innerHeight;
+  canvas_center.x = canvas.width / 2;
+  canvas_center.y = canvas.height / 2;
+}
+
+function clear() {
+	const ctx = canvas.getContext("2d");
+	ctx.clearRect(0, 0, canvas.width, canvas.height);
+}
+
+function init() {
+	canvas = document.getElementById("main_canvas");
+	resize_canvas();
+	document.onkeydown = key_down;
+	document.onkeyup = key_up;
+	game_init();
+}
+
+function tick() {
+    let now = Date.now();
+    let delta = now - lastupdate;
+    lastupdate = now;
+
+	resize_canvas(canvas);
+	game_tick(delta);
+}
+
+function game_ready() {
+	setInterval(tick, 1000 / fps);
+}