Initial commit

1 files changed, 62 insertions, 0 deletions

diff --git a/lib/main.js b/lib/main.js
new file mode 100644
index 0000000..6a2ea8f
--- /dev/null
+++ b/lib/main.js
@@ -0,0 +1,62 @@
+import Serpentity from '@serpentity/serpentity';
+import WebGLRenderer from './systems/webgl_renderer';
+import LissajousPositionUpdater from './systems/lissajous_position_updater';
+import { lissajousCurve } from './factories/curves';
+import { canvasId, fps } from './config';
+
+const internals = {
+
+  // State variables
+
+  started: false,
+  currentTime: 0,
+  engine: null,
+
+  load() {
+    // Create entities
+    const engine = new Serpentity();
+
+    // Add Systems
+    engine.addSystem(new LissajousPositionUpdater(canvasId));
+    engine.addSystem(new WebGLRenderer(canvasId));
+
+    // Add Entities
+    engine.addEntity(lissajousCurve());
+
+    internals.engine = engine;
+  },
+
+  unload() {
+    internals.engine = null;
+  },
+
+  run(time) {
+
+    const delta = time - internals.currentTime;
+    const interval = 1000 / fps;
+
+    if (delta >= interval) {
+      internals.engine.update(delta);
+      internals.currentTime = time;
+    }
+
+    internals.started && window.requestAnimationFrame(internals.run);
+  },
+
+  start() {
+    if (!internals.started) {
+      internals.started = true;
+      internals.load();
+      window.requestAnimationFrame(internals.run);
+    }
+  },
+
+  stop() {
+    if (internals.started) {
+      internals.started = false;
+      internals.unload();
+    }
+  }
+};
+
+internals.start();