fatlinesofcode/zoomblur.html

## zoomblur.html
<!-- https://codepen.io/fatlinesofcode/pen/yXVGPp -->
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <style>
        body {
            background-color: #ffffff;
            margin: 0;
            overflow: hidden;
        }
    </style>
</head>
<body>

<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/84/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>
<script src="https://threejs.org/examples/js/libs/dat.gui.min.js"></script>


<script src="https://threejs.org/examples/js/postprocessing/EffectComposer.js"></script>
<script src="https://threejs.org/examples/js/postprocessing/RenderPass.js"></script>
<script src="https://threejs.org/examples/js/postprocessing/ShaderPass.js"></script>
<script src="https://threejs.org/examples/js/shaders/CopyShader.js"></script>


<script type="x-shader/x-vertex" id="vertexShaderZoom">
    varying vec2 vUv;
        void main() {
        vUv = uv;
        gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
    }
</script>

<script type="x-shader/x-fragment" id="fragmentShaderZoom">
uniform sampler2D tDiffuse;
uniform vec2 center;
uniform float strength;
uniform vec2 resolution;
varying vec2 vUv;

float random(vec3 scale,float seed){return fract(sin(dot(gl_FragCoord.xyz+seed,scale))*43758.5453+seed);}

void main(){
	vec4 color=vec4(0.0);
	float total=0.0;
	vec2 toCenter=center-vUv*resolution;
	float offset=random(vec3(12.9898,78.233,151.7182),0.0);
	for(float t=0.0;t<=40.0;t++){
		float percent=(t+offset)/40.0;
		float weight=4.0*(percent-percent*percent);
		vec4 sample=texture2D(tDiffuse,vUv+toCenter*percent*strength/resolution);
		sample.rgb*=sample.a;
		color+=sample*weight;
		total+=weight;
	}
	gl_FragColor=color/total;
	gl_FragColor.rgb/=gl_FragColor.a+0.00001;
}
</script>

<script>

    var camera, scene, renderer, composer;
    var controls;
    var zBlurPass;
    var mesh;
    init();
    initControls();
    initGui();
    animate();
    function init() {
        camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
        camera.position.z = 400;
        scene = new THREE.Scene();
        scene.background = new THREE.Color( 0x000000 );

        THREE.ImageUtils.crossOrigin = '';
        var texture = THREE.ImageUtils.loadTexture('https://threejs.org/examples/textures/crate.gif');

        var geometry = new THREE.BoxBufferGeometry( 200, 200, 200 );
        var material = new THREE.MeshBasicMaterial( { map:texture } );
        mesh = new THREE.Mesh( geometry, material );
        scene.add( mesh );
        renderer = new THREE.WebGLRenderer();
        renderer.setPixelRatio( window.devicePixelRatio );
        renderer.setSize( window.innerWidth, window.innerHeight );
        document.body.appendChild( renderer.domElement );

        composer = new THREE.EffectComposer(renderer);
        var pass1 = new THREE.RenderPass(scene, camera);


        var shader = new THREE.ShaderMaterial({
            uniforms: {
                tDiffuse: {value: null},
                strength: { type: 'f', value: .5 },
                center: { type: 'v2', value: new THREE.Vector2( window.innerWidth *0.5, window.innerHeight*0.5 ) },
                resolution: { type: 'v2', value: new THREE.Vector2( window.innerWidth, window.innerHeight ) },
            },
            vertexShader: document.getElementById('vertexShaderZoom').textContent,
            fragmentShader: document.getElementById('fragmentShaderZoom').textContent
        });

        zBlurPass = new THREE.ShaderPass(shader);

        composer.addPass(pass1);
        composer.addPass(zBlurPass);

        zBlurPass.renderToScreen = true;

        //
        window.addEventListener( 'resize', onWindowResize, false );
    }
    function initGui() {
        var params = {
            strength: zBlurPass.uniforms.strength.value
        }
        var gui = new dat.GUI();
        gui.add(params, 'strength', .01, 2 ).onChange(function(val){
            zBlurPass.uniforms.strength.value=val;
        })
    }
    function initControls() {
        controls = new THREE.OrbitControls(camera);
        controls.damping = 0.2;
        controls.keyPanSpeed = 700;
    }
    function onWindowResize() {
        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();
        renderer.setSize( window.innerWidth, window.innerHeight );
    }
    function animate() {
        requestAnimationFrame( animate );
        mesh.rotation.x += 0.005;
        mesh.rotation.y += 0.01;
        // renderer.render( scene, camera );
        composer.render();
    }

</script>
</body>
</html>
	<!-- https://codepen.io/fatlinesofcode/pen/yXVGPp -->
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<style>
	body {
	background-color: #ffffff;
	margin: 0;
	overflow: hidden;
	}
	</style>
	</head>
	<body>

	<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/84/three.min.js"></script>
	<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>
	<script src="https://threejs.org/examples/js/libs/dat.gui.min.js"></script>


	<script src="https://threejs.org/examples/js/postprocessing/EffectComposer.js"></script>
	<script src="https://threejs.org/examples/js/postprocessing/RenderPass.js"></script>
	<script src="https://threejs.org/examples/js/postprocessing/ShaderPass.js"></script>
	<script src="https://threejs.org/examples/js/shaders/CopyShader.js"></script>


	<script type="x-shader/x-vertex" id="vertexShaderZoom">
	varying vec2 vUv;
	void main() {
	vUv = uv;
	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
	}
	</script>

	<script type="x-shader/x-fragment" id="fragmentShaderZoom">
	uniform sampler2D tDiffuse;
	uniform vec2 center;
	uniform float strength;
	uniform vec2 resolution;
	varying vec2 vUv;

	float random(vec3 scale,float seed){return fract(sin(dot(gl_FragCoord.xyz+seed,scale))*43758.5453+seed);}

	void main(){
	vec4 color=vec4(0.0);
	float total=0.0;
	vec2 toCenter=center-vUv*resolution;
	float offset=random(vec3(12.9898,78.233,151.7182),0.0);
	for(float t=0.0;t<=40.0;t++){
	float percent=(t+offset)/40.0;
	float weight=4.0(percent-percentpercent);
	vec4 sample=texture2D(tDiffuse,vUv+toCenterpercentstrength/resolution);
	sample.rgb*=sample.a;
	color+=sample*weight;
	total+=weight;
	}
	gl_FragColor=color/total;
	gl_FragColor.rgb/=gl_FragColor.a+0.00001;
	}
	</script>

	<script>

	var camera, scene, renderer, composer;
	var controls;
	var zBlurPass;
	var mesh;
	init();
	initControls();
	initGui();
	animate();
	function init() {
	camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
	camera.position.z = 400;
	scene = new THREE.Scene();
	scene.background = new THREE.Color( 0x000000 );

	THREE.ImageUtils.crossOrigin = '';
	var texture = THREE.ImageUtils.loadTexture('https://threejs.org/examples/textures/crate.gif');

	var geometry = new THREE.BoxBufferGeometry( 200, 200, 200 );
	var material = new THREE.MeshBasicMaterial( { map:texture } );
	mesh = new THREE.Mesh( geometry, material );
	scene.add( mesh );
	renderer = new THREE.WebGLRenderer();
	renderer.setPixelRatio( window.devicePixelRatio );
	renderer.setSize( window.innerWidth, window.innerHeight );
	document.body.appendChild( renderer.domElement );

	composer = new THREE.EffectComposer(renderer);
	var pass1 = new THREE.RenderPass(scene, camera);


	var shader = new THREE.ShaderMaterial({
	uniforms: {
	tDiffuse: {value: null},
	strength: { type: 'f', value: .5 },
	center: { type: 'v2', value: new THREE.Vector2( window.innerWidth 0.5, window.innerHeight0.5 ) },
	resolution: { type: 'v2', value: new THREE.Vector2( window.innerWidth, window.innerHeight ) },
	},
	vertexShader: document.getElementById('vertexShaderZoom').textContent,
	fragmentShader: document.getElementById('fragmentShaderZoom').textContent
	});

	zBlurPass = new THREE.ShaderPass(shader);

	composer.addPass(pass1);
	composer.addPass(zBlurPass);

	zBlurPass.renderToScreen = true;

	//
	window.addEventListener( 'resize', onWindowResize, false );
	}
	function initGui() {
	var params = {
	strength: zBlurPass.uniforms.strength.value
	}
	var gui = new dat.GUI();
	gui.add(params, 'strength', .01, 2 ).onChange(function(val){
	zBlurPass.uniforms.strength.value=val;
	})
	}
	function initControls() {
	controls = new THREE.OrbitControls(camera);
	controls.damping = 0.2;
	controls.keyPanSpeed = 700;
	}
	function onWindowResize() {
	camera.aspect = window.innerWidth / window.innerHeight;
	camera.updateProjectionMatrix();
	renderer.setSize( window.innerWidth, window.innerHeight );
	}
	function animate() {
	requestAnimationFrame( animate );
	mesh.rotation.x += 0.005;
	mesh.rotation.y += 0.01;
	// renderer.render( scene, camera );
	composer.render();
	}

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