WebGLExamples/basic_fog.html at master · fabricacode/WebGLExamples · GitHub

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<!DOCTYPE html>
<html lang="en">
	<head>
		<title>basic fog</title>
		<meta charset="utf-8">
		<style>
			body {
				margin: 0px;
				background-color: #000000;
				overflow: hidden;
			}
		</style>
	</head>

	<body>

		<script src="_js/three.js"></script>

		<script type="text/javascript">

			var camera, scene, renderer;	// three essentials for every WebGL project
			var mesh;						// object to be rendered

			var angle = 70;					// camera properties
			var width = window.innerWidth;
			var height = window.innerHeight;
			var aspect = width / height;
			var near = 1;
			var far = 1000;

			var radius= 100;				// planet properties
			var segments = 64;
			var rings = 64;

			var mousePressed = false;		// mouse properties
			var mouseX, mouseY;
			var xvel = 0;
			var yvel = 0;
			var zvel = 0;
			var damping = 0.95;

			setup();						// create everything
			draw();							// draw everything

			function setup(){
				// create renderer at full browser size
				renderer = new THREE.WebGLRenderer({clearColor: 0xAAAAAA, clearAlpha: 1});
				renderer.setSize(width, height);
				document.body.appendChild(renderer.domElement);

				// create camera
				camera = new THREE.PerspectiveCamera(angle, aspect, near, far);
				camera.position.z = 200;

				// create scene
				scene = new THREE.Scene();
				scene.fog = new THREE.Fog(0xAAAAAA, 50, 150);

				// create cube
				var geometry = new THREE.SphereGeometry(radius, segments, rings);

				// load texture
				var texture = THREE.ImageUtils.loadTexture("_images/world_topo_4096.jpg");
				texture.anisotropy = renderer.getMaxAnisotropy();

				// apply texture to material
				var material = new THREE.MeshBasicMaterial({map: texture});

				// apply material to mesh using cube geometry and add to scene
				mesh = new THREE.Mesh(geometry, material);
				scene.add(mesh);

				// add window listener for browser resizing
				window.addEventListener("resize", onWindowResize, false);

				// add mouse listeners to control rotation
				document.addEventListener("mousedown", onMouseDown, false);
				document.addEventListener("mouseup", onMouseUp, false);
				document.addEventListener("mousemove", onMouseMove, false);
				document.addEventListener('mousewheel', onMouseWheel, false);
			}

			function onMouseDown(event){
				mouseX = event.clientX;
				mouseY = event.clientY;
				mousePressed = true;
			}

			function onMouseUp(event){
				mousePressed = false;
			}

			function onMouseMove(event){
				if(mousePressed){
					var xdiff = event.clientX - mouseX;
					var ydiff = event.clientY - mouseY;
					xvel += xdiff * 0.001;
					yvel += ydiff * 0.001;
					mouseX = event.clientX;
					mouseY = event.clientY;
				}
			}

			function onMouseWheel(event){
				zvel += event.wheelDelta * 0.002;
			}

			function onWindowResize(){
				width = window.innerWidth;
				height = window.innerHeight;
				aspect = width / height;
				camera.aspect = aspect;
				camera.updateProjectionMatrix();

				renderer.setSize(width, height);
			}

			function draw(){
				requestAnimationFrame(draw);
				mesh.rotation.y += xvel;
				mesh.rotation.x += yvel;
				camera.position.z += zvel;
				xvel *= damping;
				yvel *= damping;
				zvel *= damping;
				renderer.render(scene, camera);
			}

		</script>

	</body>

</html>