javascript
/
three.js
oglindă de https://github.com/tazdij/three.js.git


			
				
					
						
						
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							<!-- Licensed under a BSD license. See license.html for license -->
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
    <title>Three.js - Post Processing 3DLUT (not) - prep</title>
    <style>
    html, body {
        margin: 0;
        height: 100%;
    }
    #c {
        width: 100%;
        height: 100%;
        display: block;
    }
    </style>
  </head>
  <body>
    <canvas id="c"></canvas>
  </body>
<script type="importmap">
{
  "imports": {
    "three": "../../build/three.module.js",
    "three/addons/": "../../examples/jsm/"
  }
}
</script>

<script type="module">
import * as THREE from 'three';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';

function main() {

	const canvas = document.querySelector( '#c' );
	const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
	renderer.autoClearColor = false;

	const fov = 45;
	const aspect = 2; // the canvas default
	const near = 0.1;
	const far = 100;
	const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
	camera.position.set( 0, 10, 20 );

	const controls = new OrbitControls( camera, canvas );
	controls.target.set( 0, 5, 0 );
	controls.update();

	const scene = new THREE.Scene();

	const sceneBG = new THREE.Scene();
	const cameraBG = new THREE.OrthographicCamera( - 1, 1, 1, - 1, - 1, 1 );

	let bgMesh;
	let bgTexture;
	{

		const loader = new THREE.TextureLoader();
		bgTexture = loader.load( 'resources/images/beach.jpg' );
		bgTexture.colorSpace = THREE.SRGBColorSpace;
		const planeGeo = new THREE.PlaneGeometry( 2, 2 );
		const planeMat = new THREE.MeshBasicMaterial( {
			map: bgTexture,
			depthTest: false,
		} );
		bgMesh = new THREE.Mesh( planeGeo, planeMat );
		sceneBG.add( bgMesh );

	}

	function frameArea( sizeToFitOnScreen, boxSize, boxCenter, camera ) {

		const halfSizeToFitOnScreen = sizeToFitOnScreen * 0.5;
		const halfFovY = THREE.MathUtils.degToRad( camera.fov * .5 );
		const distance = halfSizeToFitOnScreen / Math.tan( halfFovY );
		// compute a unit vector that points in the direction the camera is now
		// in the xz plane from the center of the box
		const direction = ( new THREE.Vector3() )
			.subVectors( camera.position, boxCenter )
			.multiply( new THREE.Vector3( 1, 0, 1 ) )
			.normalize();

		// move the camera to a position distance units way from the center
		// in whatever direction the camera was from the center already
		camera.position.copy( direction.multiplyScalar( distance ).add( boxCenter ) );

		// pick some near and far values for the frustum that
		// will contain the box.
		camera.near = boxSize / 100;
		camera.far = boxSize * 100;

		camera.updateProjectionMatrix();

		// point the camera to look at the center of the box
		camera.lookAt( boxCenter.x, boxCenter.y, boxCenter.z );

	}

	{

		const gltfLoader = new GLTFLoader();
		gltfLoader.load( 'resources/models/3dbustchallange_submission/scene.gltf', ( gltf ) => {

			const root = gltf.scene;
			scene.add( root );

			// fix materials from r114
			root.traverse( ( { material } ) => {

				if ( material ) {

					material.depthWrite = true;

				}

			} );

			// compute the box that contains all the stuff
			// from root and below
			const box = new THREE.Box3().setFromObject( root );

			const boxSize = box.getSize( new THREE.Vector3() ).length();
			const boxCenter = box.getCenter( new THREE.Vector3() );

			// set the camera to frame the box
			frameArea( boxSize * 0.4, boxSize, boxCenter, camera );

			// update the Trackball controls to handle the new size
			controls.maxDistance = boxSize * 10;
			controls.target.copy( boxCenter );
			controls.update();

		} );

	}

	function resizeRendererToDisplaySize( renderer ) {

		const canvas = renderer.domElement;
		const width = canvas.clientWidth;
		const height = canvas.clientHeight;
		const needResize = canvas.width !== width || canvas.height !== height;
		if ( needResize ) {

			renderer.setSize( width, height, false );

		}

		return needResize;

	}

	function render() {

		if ( resizeRendererToDisplaySize( renderer ) ) {

			const canvas = renderer.domElement;
			const canvasAspect = canvas.clientWidth / canvas.clientHeight;
			camera.aspect = canvasAspect;
			camera.updateProjectionMatrix();

			// scale the background plane to keep the image's
			// aspect correct.
			// Note the image may not have loaded yet.
			const imageAspect = bgTexture.image ? bgTexture.image.width / bgTexture.image.height : 1;
			const aspect = imageAspect / canvasAspect;
			bgMesh.scale.x = aspect > 1 ? aspect : 1;
			bgMesh.scale.y = aspect > 1 ? 1 : 1 / aspect;

		}

		renderer.render( sceneBG, cameraBG );
		renderer.render( scene, camera );

		requestAnimationFrame( render );

	}

	requestAnimationFrame( render );

}

main();
</script>
</html>