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I-am-not-a-robot.html
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>I'm not a robot</title>
<style>
html,
body {
overflow: hidden;
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background-color: #E8E8E8;
font-family: Consolas, monaco, monospace;
}
#render-canvas {
width: 300px;
height: 300px;
outline: none;
}
#center-div {
width: 300px;
height: 300px;
margin: -150px auto;
position: relative;
top: 50%;
text-align: center;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babylonjs/3.2.0/babylon.js"></script>
</head>
<body>
<div id="center-div">
<div>Please click all <span style="color: #c94c4c;">RED</span> cubes</div>
<canvas id="render-canvas"></canvas>
<div id="label" style="color: #c94c4c;">I am a robot</div>
</div>
<script>
function isCanvasSupported() {
var c = document.createElement('canvas');
return !!(c.getContext && c.getContext('2d'));
}
if (!isCanvasSupported()) {
alert("Your browser does not support canvas!");
}
function shuffle(a) {
var j, x, i;
for (i = a.length - 1; i > 0; i--) {
j = Math.floor(Math.random() * (i + 1));
x = a[i];
a[i] = a[j];
a[j] = x;
}
return a;
}
var BOX = "box";
var RED = "#f7786b";
var LIGHT_GREEN = "#b5e7a0";
var GREEN = "#4caf50";
// Cube: 3 x 3 x 3
var array = [];
for (var i = 0; i < 27; i++) {
array[i] = BOX + (i + 1);
}
// Remove center box
array.splice(13, 1);
shuffle(array);
var selectedCubes = array.slice(0, 3);
var canvas = document.getElementById("render-canvas");
var engine = new BABYLON.Engine(canvas, true);
var createScene = function () {
var scene = new BABYLON.Scene(engine);
var camera = new BABYLON.ArcRotateCamera("Camera", Math.PI / 4, Math.PI / 3, 8, new BABYLON.Vector3(0, 0, 0), scene);
camera.attachControl(canvas, true);
camera.lowerRadiusLimit = camera.upperRadiusLimit = camera.radius = 8;
// Add lights to the scene
var light1 = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 12, 0), scene);
light1.intensity = 0.8;
var matGreen = new BABYLON.StandardMaterial("matGreen", scene);
matGreen.alpha = 0.6;
matGreen.diffuseColor = new BABYLON.Color3.FromHexString(LIGHT_GREEN);
var options = {
width: 1,
height: 1,
depth: 1
};
var space = 0.2;
var offset = 1 + space;
var i = 1;
for (var y = 1; y <= 3; y++) {
for (var x = 1; x <= 3; x++) {
for (var z = 1; z <= 3; z++) {
var box = BABYLON.MeshBuilder.CreateBox(BOX + i, options, scene);
box.material = matGreen;
box.hasVertexAlpha = true;
box.position = new BABYLON.Vector3(offset * x - 2 * offset, offset * y - 2 * offset, offset * z - 2 * offset);
i++;
}
}
}
var matRed = new BABYLON.StandardMaterial("matRed", scene);
matRed.alpha = 0.8;
matRed.diffuseColor = new BABYLON.Color3.FromHexString(RED);
for (var i= 0; i < selectedCubes.length; i++) {
for (var j = 0; j < scene.meshes.length; j++) {
if (selectedCubes[i] == scene.meshes[j].name) {
scene.meshes[j].material = matRed;
break;
}
}
}
scene.onPointerDown = function (evt, pickingInfo) {
var pickResult = scene.pick(scene.pointerX, scene.pointerY);
if (pickResult.pickedMesh) {
pickResult.pickedMesh.material = matGreen;
for (var i = 0; i < selectedCubes.length; i++) {
if (selectedCubes[i] == pickResult.pickedMesh.name) {
selectedCubes[i] = -1;
break;
}
}
var count = 0;
for (var i = 0; i < selectedCubes.length; i++) {
if (selectedCubes[i] == -1) {
count++;
}
}
if (count == 3) {
document.getElementById("label").innerHTML = "I'm not a robot";
document.getElementById("label").style.color = GREEN;
}
}
}
return scene;
};
var scene = createScene();
scene.clearColor = new BABYLON.Color3.FromHexString("#E8E8E8");
engine.runRenderLoop(function () {
scene.render();
});
</script>
</body>
</html>