19-transparent-texture.html


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

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

    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 textureLoader= new THREE.TextureLoader();
        var floorTexture=textureLoader.load("../data/graphics/textures/terrain/grass1.jpg");
        floorTexture.wrapS=THREE.RepeatWrapping;
        floorTexture.wrapT=THREE.RepeatWrapping;
        floorTexture.repeat.set(5,5);
        
        var planeGeometry = new THREE.PlaneGeometry(35, 35);
        var planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff, map:floorTexture});
        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);
        
        var grassTexture=textureLoader.load("../data/graphics/textures/vegetation/grass.png");
        var grassGeometry = new THREE.PlaneGeometry(6, 6);
        var grassMaterial = new THREE.MeshLambertMaterial({color: 0xffffff, map:grassTexture, transparent:true, opacity:1, side: THREE.DoubleSide, depthWrite: false, depthTest: false });
        var grass = new THREE.Mesh(grassGeometry, grassMaterial);
        grass.position.y = 2.7;
        grass.position.x=1;

        var grass0=grass.clone();
        scene.add(grass0);
        var grass1=grass.clone();
        scene.add(grass1)
        grass1.rotation.y=0.25*Math.PI;
        var grass2=grass.clone()
        grass2.rotation.y=-0.25*Math.PI;
        scene.add(grass2)
        var grass3=grass.clone()
        grass3.rotation.y=0.5*Math.PI;
        scene.add(grass3)
        
        /*
        var wall1=wall.clone()
        scene.add(wall1);
        var wall2=wall.clone()
        scene.add(wall2);
        var wall3=wall.clone()
        scene.add(wall3);
        
        wall.position.z=-10;
        wall1.position.z=10;
        wall2.position.x=-9.5;
        wall3.position.x=9.5;
        wall2.rotation.y=0.5 * Math.PI;
        wall3.rotation.y=0.5 * Math.PI;
*/
        camera.position.x = 17;
        camera.position.y = 19;
        camera.position.z = 14;
        camera.lookAt(scene.position);

        var ambient = new THREE.AmbientLight(0xffffff,0.5);
        scene.add(ambient);
        
        var light = new THREE.DirectionalLight(0xffffff, 2, 100, 2 );
        light.position.set(10, 20 , 20); 
        light.castShadow = true;
        light.shadow.mapSize.width = 3 * 512; 
        light.shadow.mapSize.height = 3 * 512;
        light.shadow.bias = 0.1;
        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 = 0x90abed;
        };
        addControlGui(control);

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

        render();
    }

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

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


    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>
<body>

</body>
</html>