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@HarryStevens
Last active Jun 23, 2019
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Ball Control
license: gpl-3.0

Use the arrow keys to move the ball.

<!DOCTYPE html>
<html>
<head>
<style>
body {
margin: 0;
overflow: none;
}
</style>
</head>
<body>
<div id="scene"></div>
<div id="stats"></div>
<script src="https://unpkg.com/three@0.105.2/build/three.js"></script>
<script src="https://unpkg.com/three@0.104.0/examples/js/libs/stats.min.js"></script>
<script src="https://unpkg.com/three@0.104.0/examples/js/utils/SceneUtils.js"></script>
<script>
let right = 0,
left = 0,
up = 0,
down = 0;
const stats = (_ => {
const stats = new Stats();
stats.domElement.style.position = "absolute";
stats.domElement.style.left = "0px";
stats.domElement.style.top = "0px";
document.getElementById("stats").appendChild(stats.domElement);
return stats;
})();
const scene = new THREE.Scene();
const camera = (_ => {
const camera = new THREE.PerspectiveCamera(45, innerWidth / innerHeight, 0.1, 1000);
camera.position.set(40, 40, 40);
camera.lookAt(scene.position);
return camera;
})();
const renderer = (_ => {
const renderer = new THREE.WebGLRenderer();
renderer.setClearColor("#fff");
renderer.setPixelRatio(devicePixelRatio);
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
renderer.gammaOutput = true;
renderer.gammaFactor = 2.2;
document.getElementById("scene").appendChild(renderer.domElement);
return renderer;
})();
const floor = (_ => {
const geo = new THREE.PlaneBufferGeometry(20, 20);
const mat = new THREE.MeshLambertMaterial({ color: "green" });
const mesh = new THREE.Mesh(geo, mat);
mesh.rotation.x = Math.PI * -0.5;
mesh.receiveShadow = true;
scene.add(mesh);
return mesh;
})();
const floorTwo = (_ => {
const geo = new THREE.PlaneBufferGeometry(10, 40);
const mat = new THREE.MeshLambertMaterial({ color: "green" });
const mesh = new THREE.Mesh(geo, mat);
mesh.rotation.x = Math.PI * -0.5;
mesh.position.set(15, 0, -10);
mesh.receiveShadow = true;
scene.add(mesh);
return mesh;
})();
const rightWall = (_ => {
const geo = new THREE.PlaneBufferGeometry(20, 4);
const mat = new THREE.MeshLambertMaterial({ color: "orange" });
const mesh = new THREE.Mesh(geo, mat);
mesh.position.set(0, 2, -10)
mesh.receiveShadow = true;
mesh.castShadow = true;
scene.add(mesh);
return mesh;
})();
const leftWall = (_ => {
const geo = new THREE.PlaneBufferGeometry(20, 4);
const mat = new THREE.MeshLambertMaterial({ color: "purple" });
const mesh = new THREE.Mesh(geo, mat);
mesh.rotation.y = Math.PI * 0.5
mesh.position.set(-10, 2, 0)
mesh.receiveShadow = true;
mesh.castShadow = true;
scene.add(mesh);
return mesh;
})();
const leftWall2 = (_ => {
const geo = new THREE.PlaneBufferGeometry(20, 4);
const mat = new THREE.MeshLambertMaterial({ color: "purple" });
const mesh = new THREE.Mesh(geo, mat);
mesh.rotation.y = Math.PI * 0.5
mesh.position.set(10, 2, -20)
mesh.receiveShadow = true;
mesh.castShadow = true;
scene.add(mesh);
return mesh;
})();
const sphere = (_ => {
const geo = new THREE.SphereBufferGeometry(4, 32, 32);
const mats = [
new THREE.MeshLambertMaterial({ color: "#fff", wireframe: true }),
new THREE.MeshPhongMaterial({ shininess: 100, color: "blue" })
]
const mesh = new THREE.SceneUtils.createMultiMaterialObject(geo, mats)
mesh.children.forEach(e => {
e.castShadow = true;
});
mesh.position.y = 4;
scene.add(mesh);
return mesh;
})();
const ambient = (_ => {
const light = new THREE.AmbientLight("#ccc", 0.8);
scene.add(light);
return light;
})();
const spot = (_ => {
const light = new THREE.SpotLight("#fff", 0.8);
light.position.set(-20, 20, 20);
light.castShadow = true;
light.shadow.mapSize.width = 1024;
light.shadow.mapSize.height = 1024;
light.angle = Math.PI / 5;
scene.add(light);
return light;
})();
document.addEventListener("keydown", e => {
if (e.key === "ArrowRight"){
right = 1;
e.preventDefault()
}
if (e.key === "ArrowLeft"){
left = 1;
e.preventDefault()
}
if (e.key === "ArrowUp"){
up = 1;
e.preventDefault()
}
if (e.key === "ArrowDown"){
down = 1;
e.preventDefault()
}
});
document.addEventListener("keyup", e => {
if (e.key === "ArrowRight"){
right = 0;
e.preventDefault()
}
if (e.key === "ArrowLeft"){
left = 0;
e.preventDefault()
}
if (e.key === "ArrowUp"){
up = 0;
e.preventDefault()
}
if (e.key === "ArrowDown"){
down = 0;
e.preventDefault()
}
});
function animate(){
requestAnimationFrame(animate);
if (right){
if (sphere.position.x < 19.5) sphere.position.x += 0.2;
sphere.rotateOnWorldAxis(new THREE.Vector3(0, 0, 1), -0.05);
}
if (left){
if (sphere.position.z < -8){
if (sphere.position.x > 13.5) sphere.position.x -= 0.2
}
else {
if (sphere.position.x > -8) sphere.position.x -= 0.2
}
sphere.rotateOnWorldAxis(new THREE.Vector3(0, 0, 1), 0.05);
}
if (up){
if (sphere.position.x < 12.5){
if (sphere.position.z > -7.5) sphere.position.z -= 0.2;
}
else {
if (sphere.position.z > -28) sphere.position.z -= 0.2;
}
sphere.rotateOnWorldAxis(new THREE.Vector3(1, 0, 0), -0.05);
}
if (down){
if (sphere.position.z < 9) sphere.position.z += 0.2;
sphere.rotateOnWorldAxis(new THREE.Vector3(1, 0, 0), 0.05);
}
stats.update();
renderer.render(scene, camera);
}
animate();
function size(){
camera.aspect = innerWidth / innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(innerWidth, innerHeight);
}
size();
onresize = size;
</script>
</body>
</html>
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