threejs对象控制
threejs controls transform
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - transform controls</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
</head>
<body>
<script type="module">
import * as THREE from '../build/three.module.js';
import { OrbitControls } from './jsm/controls/OrbitControls.js';
import { TransformControls } from './jsm/controls/TransformControls.js';
let cameraPersp, cameraOrtho, currentCamera;
let scene, renderer, control, orbit;
init();
render();
function init() {
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
const aspect = window.innerWidth / window.innerHeight;
cameraPersp = new THREE.PerspectiveCamera( 50, aspect, 0.01, 30000 );
cameraOrtho = new THREE.OrthographicCamera( - 600 * aspect, 600 * aspect, 600, - 600, 0.01, 30000 );
currentCamera = cameraPersp;
currentCamera.position.set( 1000, 500, 1000 );
currentCamera.lookAt( 0, 200, 0 );
scene = new THREE.Scene();
scene.add( new THREE.GridHelper( 1000, 10, 0x888888, 0x444444 ) );
const light = new THREE.DirectionalLight( 0xffffff, 2 );
light.position.set( 1, 1, 1 );
scene.add( light );
const texture = new THREE.TextureLoader().load( 'textures/crate.gif', render );
texture.anisotropy = renderer.capabilities.getMaxAnisotropy();
const geometry = new THREE.BoxGeometry( 200, 200, 200 );
const material = new THREE.MeshLambertMaterial( { map: texture, transparent: true } );
orbit = new OrbitControls( currentCamera, renderer.domElement );
orbit.update();
orbit.addEventListener( 'change', render );
control = new TransformControls( currentCamera, renderer.domElement );
control.addEventListener( 'change', render );
control.addEventListener( 'dragging-changed', function ( event ) {
orbit.enabled = ! event.value;
} );
const mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
control.attach( mesh );
scene.add( control );
window.addEventListener( 'resize', onWindowResize );
window.addEventListener( 'keydown', function ( event ) {
switch ( event.keyCode ) {
case 81: // Q
control.setSpace( control.space === 'local' ? 'world' : 'local' );
break;
case 16: // Shift
control.setTranslationSnap( 100 );
control.setRotationSnap( THREE.MathUtils.degToRad( 15 ) );
control.setScaleSnap( 0.25 );
break;
case 87: // W
control.setMode( 'translate' );
break;
case 69: // E
control.setMode( 'rotate' );
break;
case 82: // R
control.setMode( 'scale' );
break;
case 67: // C
const position = currentCamera.position.clone();
currentCamera = currentCamera.isPerspectiveCamera ? cameraOrtho : cameraPersp;
currentCamera.position.copy( position );
orbit.object = currentCamera;
control.camera = currentCamera;
currentCamera.lookAt( orbit.target.x, orbit.target.y, orbit.target.z );
onWindowResize();
break;
case 86: // V
const randomFoV = Math.random() + 0.1;
const randomZoom = Math.random() + 0.1;
cameraPersp.fov = randomFoV * 160;
cameraOrtho.bottom = - randomFoV * 500;
cameraOrtho.top = randomFoV * 500;
cameraPersp.zoom = randomZoom * 5;
cameraOrtho.zoom = randomZoom * 5;
onWindowResize();
break;
case 187:
case 107: // +, =, num+
control.setSize( control.size + 0.1 );
break;
case 189:
case 109: // -, _, num-
control.setSize( Math.max( control.size - 0.1, 0.1 ) );
break;
case 88: // X
control.showX = ! control.showX;
break;
case 89: // Y
control.showY = ! control.showY;
break;
case 90: // Z
control.showZ = ! control.showZ;
break;
case 32: // Spacebar
control.enabled = ! control.enabled;
break;
}
} );
window.addEventListener( 'keyup', function ( event ) {
switch ( event.keyCode ) {
case 16: // Shift
control.setTranslationSnap( null );
control.setRotationSnap( null );
control.setScaleSnap( null );
break;
}
} );
}
function onWindowResize() {
const aspect = window.innerWidth / window.innerHeight;
cameraPersp.aspect = aspect;
cameraPersp.updateProjectionMatrix();
cameraOrtho.left = cameraOrtho.bottom * aspect;
cameraOrtho.right = cameraOrtho.top * aspect;
cameraOrtho.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
render();
}
function render() {
renderer.render( scene, currentCamera );
}
</script>
</body>
</html>
参考：https://threejs.org/examples/#webgl_animation_keyframes
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