我正在研究来自three.js的多维数据集示例（webgl_interactive_cubes_gpu.html）。我意识到事件会进入整个html页面。我的意思是我可以旋转，放大或缩小，即使鼠标指针不在场景内..
我稍微谷歌并找到了一些答案（Allow mouse control of three.js scene only when mouse is over canvas），但它们对我不起作用。下面是我的代码......
var container, stats;
var camera, controls, scene, renderer;
var pickingData = [], pickingTexture, pickingScene;
var objects = [];
var highlightBox;
var mouse = new THREE.Vector2();
var offset = new THREE.Vector3( 10, 10, 10 );
init();
animate();
function init() {
container = document.getElementById( "container" );
camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 1000;
//camera.translateZ( -500 );
controls = new THREE.TrackballControls(camera);
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 4;
controls.panSpeed = 0.8;
controls.noZoom = false;
controls.noPan = false;
controls.staticMoving = true;
controls.dynamicDampingFactor = 0.3;
scene = new THREE.Scene();
pickingScene = new THREE.Scene();
pickingTexture = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight );
pickingTexture.minFilter = THREE.LinearFilter;
pickingTexture.generateMipmaps = false;
scene.add( new THREE.AmbientLight( 0x555555 ));
var light = new THREE.SpotLight( 0xffffff, 1.5 );
light.position.set( 0, 500, 2000 );
scene.add( light );
var geometry = new THREE.Geometry(),
pickingGeometry = new THREE.Geometry(),
pickingMaterial = new THREE.MeshBasicMaterial( { vertexColors: THREE.VertexColors } ),
defaultMaterial = new THREE.MeshLambertMaterial({ color: 0xffffff, shading: THREE.FlatShading, vertexColors: THREE.VertexColors} );
function applyVertexColors( g, c ) {
g.faces.forEach( function( f ) {
var n = ( f instanceof THREE.Face3 ) ? 3 : 4;
for( var j = 0; j < n; j ++ ) {
f.vertexColors[ j ] = c;
}
} );
}
var geom = new THREE.BoxGeometry(0.005, 0.005, 0.005 );
var color = new THREE.Color();
var matrix = new THREE.Matrix4();
var quaternion = new THREE.Quaternion();
var coord="219_163_189;130_173_179;161_113_231;
var splitCoord=coord.split(";");
var coordColr="0_255_255;255_255_0;0_0_255;0_255_0;255_255_0;
var splitCoordColor=coordColr.split(";");
for ( var i = 0; i < splitCoord.length; i++ ) {
var position = new THREE.Vector3();
var xyz=splitCoord[i].split("_");
var col=splitCoordColor[i].split("_");
position.x = xyz[0];
position.y = xyz[1];
position.z = xyz[2];
var rotation = new THREE.Euler();
rotation.x = 0
rotation.y = 0;
rotation.z = 0;
var scale = new THREE.Vector3();
scale.x = 200 + 100;
scale.y = 200 + 100;
scale.z = 200 + 100;
quaternion.setFromEuler(rotation, false );
matrix.compose( position, quaternion, scale);
col[0]=col[0]/255;
col[1]=col[1]/255;
col[2]=col[2]/255;
applyVertexColors(geom, color.setRGB(col[0], col[1], col[2]));
geometry.merge(geom, matrix);
// give the geom's vertices a color corresponding to the "id"
applyVertexColors( geom, color.setHex( i ) );
pickingGeometry.merge( geom, matrix );
pickingData[ i ] = {
position: position,
rotation: rotation,
scale: scale
};
}
var drawnObject = new THREE.Mesh( geometry, defaultMaterial );
scene.add(drawnObject);
pickingScene.add( new THREE.Mesh( pickingGeometry, pickingMaterial ) );
highlightBox = new THREE.Mesh(
new THREE.BoxGeometry( 0.01, 0.01, 0.01 ),
new THREE.MeshLambertMaterial( { color: 0xffff00 }
) );
scene.add( highlightBox );
renderer = new THREE.WebGLRenderer( );
//renderer.setClearColor( 0xffffff );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize(800, 800);
renderer.sortObjects = false;
container.appendChild(renderer.domElement);
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild( stats.domElement );
//renderer.domElement.addEventListener('mousemove', onMouseMove );
}
function onMouseMove( e ) {
mouse.x = e.clientX;
mouse.y = e.clientY;
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function pick() {
//render the picking scene off-screen
renderer.render( pickingScene, camera, pickingTexture );
//create buffer for reading single pixel
var pixelBuffer = new Uint8Array( 4 );
//read the pixel under the mouse from the texture
renderer.readRenderTargetPixels(pickingTexture, mouse.x, pickingTexture.height - mouse.y, 1, 1, pixelBuffer);
//interpret the pixel as an ID
var id = ( pixelBuffer[0] << 16 ) | ( pixelBuffer[1] << 8 ) | ( pixelBuffer[2] );
var data = pickingData[ id ];
if (data) {
//move our highlightBox so that it surrounds the picked object
if ( data.position && data.rotation && data.scale ){
highlightBox.position.copy( data.position );
highlightBox.rotation.copy( data.rotation );
highlightBox.scale.copy( data.scale ).add( offset );
highlightBox.visible = true;
}
} else {
highlightBox.visible = false;
}
}
function render() {
controls.update();
pick();
renderer.render( scene, camera );
}
任何帮助都非常感谢.. 感谢
答案 0 :(得分：1)
您可以将画布作为参数传递给TrackballsControls构造函数。
var controls = new THREE.TrackballControls(camera, renderer.domElement);
那应该可以解决问题。
编辑：包含一个工作示例，
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, 400 / 300, 1, 1000);
var renderer = new THREE.WebGLRenderer();
renderer.setSize(400, 300);
document.body.appendChild(renderer.domElement);
var controls = new THREE.TrackballControls(camera, renderer.domElement);
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 4;
controls.panSpeed = 0.8;
controls.noZoom = false;
controls.noPan = false;
controls.staticMoving = true;
controls.dynamicDampingFactor = 0.3;
var geometry = new THREE.BoxGeometry(1, 1, 1);
var material = new THREE.MeshBasicMaterial({
color: 0x00ff00
});
var cube = new THREE.Mesh(geometry, material);
scene.add(cube);
camera.position.z = 5;
var render = function() {
requestAnimationFrame(render);
controls.update();
cube.rotation.x += 0.1;
cube.rotation.y += 0.1;
renderer.render(scene, camera);
};
render();
无法让你的代码完全运行..