Parabolic Path

19/02/2019 #Ar.js
Ar.js Parabolic Path 예제

코드

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <title>Hello Cube</title>
    
    <!-- include three.js -->
    <script type="text/javascript" src="../../lib/threejs/build/three.js"></script>
    
    <!-- inclde jsartookit -->
    <script type="text/javascript" src="../../lib/jsartoolkit5/artoolkit.min.js"></script>
    <script type="text/javascript" src="../../lib/jsartoolkit5/artoolkit.api.js"></script>
    
    <!-- include threex.artoolkit -->
    <script type="text/javascript" src="../../lib/threex/threex-artoolkitsource.js"></script>
    <script type="text/javascript" src="../../lib/threex/threex-artoolkitcontext.js"></script>
    <script type="text/javascript" src="../../lib/threex/threex-arbasecontrols.js"></script>
    <script type="text/javascript" src="../../lib/threex/threex-armarkercontrols.js"></script>
    
</head>
<body style='margin : 0px; overflow: hidden; font-family: monospace;'>
<script type="text/javascript">
var scene, camera, renderer, clock, deltaTime, totalTime;
 
var  arToolkitSource, arToolkitContext;
 
var markerRootA, markerRootB;
 
var ballMesh;
 
var sceneGroup;
 
initialize(); 
animate();
 
function initialize(){
    scene = new THREE.Scene();    // 씬 생성 
    
    // 카메라 생성
    camera = new THREE.Camera();
    scene.add(camera);
    
    // 랜더러 생성
    renderer = new THREE.WebGLRenderer({
        antialias: true,
        alpha: true
    });
    
    // 랜더러 설정 및 도큐먼트에 추가 
    renderer.setClearColor(new THREE.Color('lightgrey'), 0);
    renderer.setSize(640, 480);
    renderer.domElement.style.position = 'absolute';
    renderer.domElement.style.top = '0px';
    renderer.domElement.style.left = '0px';
    document.body.appendChild(renderer.domElement);
    
    // 클락 생성 및 타임 설정 
    clock = new THREE.Clock();
    deltaTime = 0; 
    totalTime = 0; 
    
    // ArToolkitSouce 설정
    arToolkitSource = new THREEx.ArToolkitSource({
        sourceType: 'webcam'
    });
    
    function onResize(){
        arToolkitSource.onResize();
        arToolkitSource.copySizeTo(renderer.domElement);
        if(arToolkitContext.arController !== null){
            arToolkitSource.copySizeTo(arToolkitContext.arController.canvas);
        }
    }
    
    arToolkitSource.init(function onReady(){
        onResize();
    });
    
    window.addEventListener('resize', function(){
        onResize();
    });
    
    // ArToolkitContext 세팅
    
    // ArToolkitContext 생성 
    arToolkitContext = new THREEx.ArToolkitContext({
        cameraParametersUrl: 'data/camera_para.dat',
        detectionMode: 'mono'
    });
    
    arToolkitContext.init(function onCompleted(){
        camera.projectionMatrix.copy(arToolkitContext.getProjectionMatrix());
    });
    
    // MarkerRoots 세팅 
    markerRootA = new THREE.Group();
    scene.add(markerRootA);
    let markerControls1 = new THREEx.ArMarkerControls(arToolkitContext, markerRootA, {
        type: 'pattern',
        patternUrl: 'data/letterA.patt'
    });
    
    
    markerRootB = new THREE.Group();
    scene.add(markerRootB);
    let markerControls2 = new THREEx.ArMarkerControls(arToolkitContext, markerRootB, {
        type: 'pattern',
        patternUrl: 'data/letterB.patt'
    });
    
    // 씬 세팅 
    renderer.shadowMap.enabled = true;
    renderer.shadowMap.type = THREE.PCFSoftShadowMap;
    
    let loader = new THREE.TextureLoader();
    
    sceneGroup = new THREE.Group();
    markerRootA.add(sceneGroup);
    
    let floorGeometry = new THREE.PlaneGeometry(20, 20);
    let floorMaterial = new THREE.ShadowMaterial();
    floorMaterial.opacity = 0.3;
    let floorMesh = new THREE.Mesh(floorGeometry, floorMaterial);
    floorMesh.rotation.x = -Math.PI/2;
    floorMesh.receiveShadow = true;
    sceneGroup.add(floorMesh);
    
    ballMesh = new THREE.Mesh(
        new THREE.SphereGeometry(0.25, 32, 32),
        new THREE.MeshLambertMaterial({
            map: loader.load('images/basketball-gray.png'),
            color: 0xff8800
        })
    );
    ballMesh.castShadow = true;
    scene.add(ballMesh);
    
    let light = new THREE.PointLight(0xffffff, 1, 100);
    light.position.set(0, 4, 0);
    light.castShadow = true;
    sceneGroup.add(light);
    
    let lightSphere = new THREE.Mesh(
        new THREE.SphereGeometry(0.1),
        new THREE.MeshBasicMaterial({
            color: 0xffffff,
            transparent: true,
            opacity: 0.8
        })
    );
    
    lightSphere.position.copy(light.position);
    sceneGroup.add(lightSphere);
    
    let ambientLight = new THREE.AmbientLight(0x666666);
    sceneGroup.add(ambientLight);
    
    let clipPlane = new THREE.Plane().setFromNormalAndCoplanarPoint(
        new THREE.Vector3(0, 1, 0), 
        new THREE.Vector3(0, 0, 0)
    );
    
    renderer.clippingPlanes = [clipPlane];
}
 
function update(){
    //update artoolkit on every frame
    if(arToolkitSource.ready !== false){
        arToolkitContext.update(arToolkitSource.domElement);
    }
    
    if(markerRootA.visible && markerRootB.visible){
        renderer.clippingPlanes[0].setFromNormalAndCoplanarPoint(
            new THREE.Vector3(0, 1, 0).applyQuaternion(sceneGroup.getWorldQuaternion()),
            sceneGroup.getWorldPosition()
        );
        
        let p = parabolicPath(markerRootA.getWorldPosition(), markerRootB.getWorldPosition(), (totalTime/1)%4-1);
        ballMesh.position.copy(p);
        ballMesh.rotation.z += 0.1;
    }
    
}
 
//점 (0, p0), (1, p1), (2, p2)를 통과하는 함수 p ()
function parabolaEvaluate(p0, p1, p2, t){
    return ( 0.5*(p0 - 2*p1 + p2) )*t*t + ( -0.5*(3*p0 - 4*p1 + p2) )*t + ( p0 );
}
 
function parabolicPath(pointStart, pointEnd, time){
    let pointMiddle = new THREE.Vector3().addVectors(pointStart, pointEnd).multiplyScalar(0.5).add(new THREE.Vector3(0,2,0));
    
    return new THREE.Vector3(
            parabolaEvaluate( pointStart.x, pointMiddle.x, pointEnd.x, time ),
            parabolaEvaluate( pointStart.y, pointMiddle.y, pointEnd.y, time ),
            parabolaEvaluate( pointStart.z, pointMiddle.z, pointEnd.z, time )
    );
}
 
function render(){
    renderer.render(scene, camera);
}
 
function animate(){
    requestAnimationFrame(animate);
    deltaTime = clock.getDelta();
    totalTime += deltaTime;
    update();
    render();
}
</script>
</body>
</html>
Colored by Color Scripter
cs
마커 이미지

이 예제는 카메라로 마커이미지 A와 B를 비춰야 정상적으로 실행 할 수 있습니다.