babylon.js ecsy binding and helpers
Add script tags of Babylon.js, ecsy and ecsy-babylon.
Add a canvas tag as container.
Build a basic scene.
<html>
<head>
<script src="https://unpkg.com/ecsy@0.2.1/build/ecsy.min.js"></script>
<script src="https://unpkg.com/babylonjs@4.1.0-beta.18/babylon.js"></script>
<script src="https://unpkg.com/@megavr/ecsy-babylon@0.0.10/dist/ecsy-babylon.min.js"></script>
</head>
<body>
<canvas id="renderCanvas" style="width: 100%; height: 100%"></canvas>
<script>
/** Step 1 - Preparation */
// create a ECSY world object
const world = new ECSY.World();
// register necessary systems from ecsy-babylon(global name: EB)
world
.registerSystem(EB.GameSystem)
.registerSystem(EB.TransformSystem)
.registerSystem(EB.CameraSystem)
.registerSystem(EB.MeshSystem)
.registerSystem(EB.InputSystem);
/** Step 2 - Start the game engine */
// get canvas element
const canvas = document.getElementById("renderCanvas");
// get GameSystem object
const game = world.getSystem(EB.GameSystem);
// start GameSystem by providing canvas object
game.start(canvas);
/** Step 3 - Start to build your scene */
// add a scene
const scene = world.createEntity().addComponent(EB.Scene);
// add a camera
const camera = world.createEntity()
.addComponent(EB.Transform)
.addComponent(EB.Camera);
// up camera to height of eyes at standing human
camera.getMutableComponent(EB.Transform).position.y = 1.7;
// add a box
const box = world.createEntity()
.addComponent(EB.Transform)
.addComponent(EB.Mesh);
// put box in front of camera
box.getMutableComponent(EB.Transform).position.z = 3;
/** Step 4 - Add some interaction to your scene */
// add keyboard input
world.createEntity().addComponent(EB.Input, { onKey: onKey });
// rotate box when press R/r key
function onKey(key, down) {
if (down) {
if (key === "R" || key === "r") {
box.getMutableComponent(EB.Transform).rotation.y += 30;
}
}
}
</script>
</body>
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