01-loadOBJ.html


<!DOCTYPE html>
<html>
<head>
    <title>three.js webgl - load OBJ</title>
    <meta charset="utf-8">
    <script src="../frameworks/three.min.js"></script>
    <script src="../frameworks/loaders/MTLLoader.js"></script>
    <script src="../frameworks/loaders/OBJLoader.js"></script>
    <script src="../frameworks/dat.gui.min.js"></script>
    <style>
        body {
            margin: 0;
            overflow: hidden;
        }
    </style>
<script>

    var renderer;
    var scene;
    var camera;
    var clock;
    var control;
    
    var tower;

    function init() {

        scene = new THREE.Scene();

        camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);

        renderer = new THREE.WebGLRenderer();
        renderer.setClearColor(0x000000, 1.0);
        renderer.physicallyCorrectLights = true;
        renderer.gammaInput = true;
        renderer.gammaOutput = true;
        renderer.shadowMap.enabled = true;
        renderer.toneMapping = THREE.ReinhardToneMapping;
        renderer.setPixelRatio( window.devicePixelRatio );
        renderer.setSize( window.innerWidth, window.innerHeight );

        var planeGeometry = new THREE.PlaneGeometry(50, 50);
        var planeMaterial = new THREE.MeshLambertMaterial({color: 0xcccccc});
        var plane = new THREE.Mesh(planeGeometry, planeMaterial);
        plane.receiveShadow = true;
        plane.rotation.x = -0.5 * Math.PI;
        plane.position.x = 0;
        plane.position.y = 0;
        plane.position.z = 0;

        scene.add(plane);

        camera.position.x = 15;
        camera.position.y = 37;
        camera.position.z = 33;
        camera.lookAt(scene.position);


        var ambient = new THREE.AmbientLight(0xffffff,0.3);
        scene.add(ambient);
        
        var light = new THREE.DirectionalLight(0xffffff, 1, 100, 2 );
        light.position.set(10, 20 , 20); 
        light.castShadow = true;
        light.shadow.camera.near = 0;
        light.shadow.camera.far = 50; 
        light.shadow.mapSize.width = 3 * 512; 
        light.shadow.mapSize.height = 3 * 512;
        light.shadow.camera.top = 25; //X
        light.shadow.camera.right = 25;
        light.shadow.camera.left = -25;
        light.shadow.camera.bottom = -25;
        light.shadow.camera.visible = true;
        scene.add(light);

        control = new function() {
            this.rotationSpeed = 0.5;
            this.opacity = 1;
            this.color = 0x086113;
        };
        addControlGui(control);

        clock = new THREE.Clock();
        document.body.appendChild(renderer.domElement);

        loadOBJ ("../data/models/castle/", "tower1.mtl", "tower1.obj",  scene, function (obj){
            tower=obj;
            render();
        });
        
    }

    function addControlGui(controlObject) {
        var gui = new dat.GUI();
        gui.add(controlObject, 'rotationSpeed', -1, 1);
        gui.add(controlObject, 'opacity', 0.1, 1);
    }


    function render() {

        var delta =  clock.getDelta();
        var rotSpeed = delta*control.rotationSpeed;
        camera.position.x = camera.position.x * Math.cos(rotSpeed) + camera.position.z * Math.sin(rotSpeed);
        camera.position.z = camera.position.z * Math.cos(rotSpeed) - camera.position.x * Math.sin(rotSpeed);
        camera.lookAt(scene.position);

        tower.traverse(function (child) {
            if (child instanceof THREE.Mesh) {
                child.material.transparent = true;
                child.material.opacity = control.opacity;
            }
        });

        requestAnimationFrame(render);
        renderer.render(scene, camera);
    }

    function loadOBJ (path, fileMaterial, fileOBJ, scene, fSuc, fFail) {
        var onProgress = function (xhr) {
                if (xhr.lengthComputable) {
                    var percentComplete = xhr.loaded / xhr.total * 100;
                    console.log(Math.round(percentComplete, 2) + '% downloaded');
                }
        };

        var onError = function (xhr) {
            if (fFail) {fFail(xhr);}
            console.log('ERROR');
        };
        var mtlLoader = new THREE.MTLLoader();
        mtlLoader.setPath(path);
        mtlLoader.load(fileMaterial, function (materials) {
            materials.preload();
            var objLoader = new THREE.OBJLoader();
            objLoader.setMaterials(materials);
            objLoader.setPath(path);
            objLoader.load(fileOBJ, function (object) {

                //Active shadows
                object.traverse(function (child) {
                    if (child instanceof THREE.Mesh) {
                              child.castShadow = true;
                    }

                });
                object.castShadow = true;
                object.position.set(0, 0, 0);

                scene.add(object);
                fSuc(object);
   
            }, onProgress, onError);

        });
    };
    
    function handleResize() {
        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();
        renderer.setSize(window.innerWidth, window.innerHeight);
    }

    window.onload = init;
    window.addEventListener('resize', handleResize, false);

</script>
</head>
<body>
</body>
</html>