Shader

01/02/2019 #Ar.js
Ar.js Shader 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>Texture</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;'>
 
<!-- 커스텀 쉐이더 -->
<script id="vertexShader" type="x-shader/x-vertex">
uniform float time;
varying vec2 textureUV;
void main(){
    textureUV = uv;
    vec3 newPosition = position + vec3(0, 0, abs(sin(time)));
    gl_Position = projectionMatrix * modelViewMatrix * vec4(newPosition, 1.0);
}
</script>
 
<script id="fragmentShader" type="x-shader/x-vertex">
uniform float time;
uniform sampler2D baseTexture;
varying vec2 textureUV;
void main(){
    float amt = abs(sin(time));
    vec4 tintColor = texture2D(baseTexture, textureUV) * vec4(amt, amt, 1, 1);
    gl_FragColor = tintColor;
}
</script>
 
<script type="text/javascript">
var scene, camera, renderer, clock, deltaTime, totalTime;
var arToolkitSource, arToolkitContext
var markerRoot1;
var mesh1;
 
initialize();
animate();
 
function initialize(){
    
    // 씬 생성
    scene = new THREE.Scene();
    
    // 조명 생성 후 씬에 삽입
    let ambientLight = new THREE.AmbientLight(0xcccccc, 0.5);
    scene.add(ambientLight);
    
    // 카메라 생성 후 씬에 삽입
    camera = new THREE.Camera();
    scene.add(camera);
    
    // 랜더러 생성 및 설정 후 도큐먼트에 삽입
    renderer = new THREE.WebGLRenderer({
        antialias: true,
        alpha: true
    });
    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 타이머 초기화
    clock = new THREE.Clock();
    deltaTime = 0; 
    totalTime = 0; 
    
    // arToolkitSource 셋업
    arToolkitSource = new THREEx.ArToolkitSource({
        sourceType: 'webcam'
    });
    
    // onResize 함수 
    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 생성
    arToolkitContext = new THREEx.ArToolkitContext({
        cameraParametersUrl: 'data/camera_para.dat',
        detectionMode: 'mono'
    });
    
    // copy projection matrix to camera when initialization complete
    arToolkitContext.init(function onCompleted(){
        camera.projectionMatrix.copy(arToolkitContext.getProjectionMatrix());
    });
    
    // markerControls 빌드
    markerRoot1 = new THREE.Group();
    scene.add(markerRoot1);
    
    let markerControls1 = new THREEx.ArMarkerControls(arToolkitContext, markerRoot1, {
        type: 'pattern',
        patternUrl: 'data/hiro.patt'
    });
    
    // 변경 되는 부분
    let geometry1 = new THREE.PlaneBufferGeometry(1,1, 4,4);
    let loader = new THREE.TextureLoader();
    let texture = loader.load('images/color-grid.png', render);
    
    material1 = new THREE.ShaderMaterial({
        uniforms: {
            time: {value: 1.0},
            baseTexture: {value: texture}
        },
        vertexShader: document.getElementById('vertexShader').textContent,
        fragmentShader: document.getElementById('fragmentShader').textContent
    });
    
    
    mesh1 = new THREE.Mesh( geometry1, material1 );
    mesh1.rotation.x = -Math.PI/2;
    
    markerRoot1.add( mesh1 );
}
 
function update(){
    if(arToolkitSource.ready !== false){
        arToolkitContext.update(arToolkitSource.domElement);
    }
    
    material1.uniforms.time.value += deltaTime;
}
 
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 Hiro를 비춰야 정상적으로 실행 할 수 있습니다.