javascript
/
three.js
zrcadlo https://github.com/tazdij/three.js.git


			
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							<html>
    <head>
        <title>three.js webgl - collision reaction</title>
        <meta http-equiv="content-type" content="text/html; charset=utf-8">
        <style type="text/css">

            body {
                font-family: Monospace;
                background-color: #f0f0f0;
                margin: 0px;
                overflow: hidden;
            }

            #oldie {
                background-color: #ddd !important
            }

            #info {
                position: absolute;
                top: 30px;
                left: 10px;
                width: 800px;
                color: #000000;
                padding: 5px;
                font-family: Monospace;
                font-size: 13px;
                text-align: left;
                z-index: 100;
            }

            #options {
                position: absolute;
                top: 10px;
                left: 10px;
                width: 800px;
                color: #000000;
                padding: 5px;
                font-family: Monospace;
                font-size: 13px;
                text-align: left;
                z-index: 100;
            }

        </style>
        <script type="text/javascript" src="../build/Three.js">
        </script>
        <script type="text/javascript" src="js/RequestAnimationFrame.js">
        </script>
        <script type="text/javascript">

            var camera, scene, renderer, info, mouse2d, sun, loader, sphere, debugNormal;

            var range = 400;
            var speed = 1;
            var sphereSize = 4;

			var cubes = [];


            function init(){
                container = document.createElement('div');
                document.body.appendChild(container);

                info = document.getElementById("info");

                camera = new THREE.Camera(40, window.innerWidth / window.innerHeight, 1, 10000);
                camera.position.y = 120;
				camera.position.x = 300;
				camera.position.z = 0;
                mouse2d = new THREE.Vector3(0, 0, 1);

                loader = new THREE.Loader(true);

                scene = new THREE.Scene();

                sphere = new THREE.Mesh( new THREE.SphereGeometry( sphereSize, 10, 10 ), new THREE.MeshLambertMaterial( { color: 0xff0000 } ) );
                scene.add( sphere );

                renderer = new THREE.WebGLRenderer();
                renderer.setSize(window.innerWidth, window.innerHeight);
                container.appendChild(renderer.domElement);

                var ambientLight = new THREE.AmbientLight(0xdddddd);
                scene.add(ambientLight);

                sun = new THREE.DirectionalLight(0xffffff);
                sun.position = new THREE.Vector3(1, -1, 1).normalize();
                scene.add(sun);

                createObstacles();

				var geometry = new THREE.Geometry();
				geometry.vertices.push( new THREE.Vertex( new THREE.Vector3(0,  0,  0) ) );
				geometry.vertices.push( new THREE.Vertex( new THREE.Vector3(10, 0,  0) ) );
				debugNormal = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: 0xff0000 } ) );
				scene.add( debugNormal );

                container.onmousemove = onDocumentMouseMove;
                animate();
            }

            function createObstacles(){
                				createCube(100, 50, 10, new THREE.Vector3( 20, 0, 100), Math.PI / 4);
				camera.target = createCube(100, 50, 10, new THREE.Vector3(-20, 0, 200), -Math.PI / 4);
								createCube(100, 50, 10, new THREE.Vector3( 20, 0, 300), Math.PI / 4);
            }

            function createCube(sx, sy, sz, p, ry){
                
                var cube = new THREE.Mesh( new THREE.CubeGeometry( sx, sy, sz ), new THREE.MeshLambertMaterial( { color: 0x003300 } ) );
                cube.position = p;
		cube.rotation.y = ry;
                scene.add(cube);
                THREE.Collisions.colliders.push( THREE.CollisionUtils.MeshOBB(cube) );
				cubes.push(cube);
				return cube;
            }

            function onDocumentMouseMove(event){
                event.preventDefault();
                mouse2d.x = (event.clientX / window.innerWidth) * 2 - 1;
                mouse2d.y = -(event.clientY / window.innerHeight) * 2 + 1;
                mouse2d.z = 1;
            }

            function animate(){
                requestAnimationFrame(animate);

				for (var i = 0; i < cubes.length; i++) {
					cubes[i].materials[0].color = new THREE.Color(0x003300);
				}

				var ray = new THREE.Ray( sphere.position, new THREE.Vector3(0,0,1) );

				//debugNormal.position = sphere.position;


				var c = THREE.Collisions.rayCastNearest(ray);

				if (!c || c.distance > speed) {
					sphere.position.z += speed;
				}

				if(c && c.normal) {
					info.innerHTML = vts(c.normal);
					var poi = ray.origin.clone().addSelf( ray.direction.clone().multiplyScalar( c.distance ) );
					debugNormal.geometry.vertices[0].position = poi.clone().addSelf( new THREE.Vector3(2,2,2) );
					debugNormal.geometry.vertices[1].position = poi.clone().addSelf( c.normal.clone() );
				}


                if(sphere.position.z > range) sphere.position = new THREE.Vector3(0,0,0);

				camera.position.x = Math.cos(mouse2d.x * Math.PI) * 300;
				camera.position.y = Math.cos(mouse2d.y * Math.PI) * 300;
				camera.position.z = 200 + Math.sin(mouse2d.x * Math.PI) * 300 +  Math.sin(mouse2d.y * Math.PI) * 300;

                renderer.render(scene, camera);
            }

            function vts(v){
                if (!v)
                    return "undefined<br>";
                else
                    return v.x + " , " + v.y + " , " + v.z + "<br>";
            }

        </script>
    </head>
    <body onload="init();">
        <div id="info">
        </div>
        <div id="options">
        </div>
    </body>
</html>