使用 Doob 先生的出色示例（可在http://threejs.org/examples/css3d_molecules.html获得） ，我想创建一个网页，显示两个相邻的 3D 化学结构：
如您所见，我正在努力解决右半部分的结构问题。两半都有<div>适当的 idcontainerleft和containerright丑陋的背景颜色:)。我尝试复制所有变量并将它们分配给一个container，但无济于事。
我找到了一个使用 WebGL 的带有多个视图的 three.js 示例，不幸的是我不能使用 WebGL。
请在下面找到我正在使用的代码。它是来自https://github.com/mrdoob/three.jsexamples/css3d_molecules.html的精简版。
<div id="containerleft"></div>
<div id="containerright"></div>
<!-- *** 3D MOLECULE *** -->
<script src="../../../www/js/three/three.min.js"></script>
<script src="../../../www/js/three/TrackballControls.js"></script>
<script src="../../../www/js/three/CSS3DRenderer.js"></script>
<script src="../../../www/js/three/PDBLoader.js"></script>
<script>
var cameraleft, scene, renderer;
var controls;
var root;
var objects = [];
var tmpVec1 = new THREE.Vector3();
var tmpVec2 = new THREE.Vector3();
var tmpVec3 = new THREE.Vector3();
var tmpVec4 = new THREE.Vector3();
var visualizationType = 2;
var loader = new THREE.PDBLoader();
var colorSpriteMap = {};
var baseSprite = document.createElement( 'img' );
init();
animate();
function init() {
cameraleft = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 5000 );
cameraleft.position.z = 1500;
scene = new THREE.Scene();
root = new THREE.Object3D();
scene.add( root );
//
renderer = new THREE.CSS3DRenderer();
renderer.setSize( window.innerWidth / 2, window.innerHeight);
document.getElementById('containerleft').appendChild( renderer.domElement );
//
controls = new THREE.TrackballControls( cameraleft, renderer.domElement );
controls.rotateSpeed = 0.5;
controls.addEventListener( 'change', render );
//
baseSprite.onload = function () {
loadMolecule( "models/molecules/h2co3.pdb" );
};
baseSprite.src = 'textures/sprites/ball.png';
//
window.addEventListener( 'resize', onWindowResize, false );
}
//
function generateButtonCallback( url ) {
return function ( event ) {
loadMolecule( url );
}
}
function showAtomsBonds() {
for ( var i = 0; i < objects.length; i ++ ) {
var object = objects[ i ];
object.element.style.display = "";
object.visible = true;
if ( ! ( object instanceof THREE.CSS3DSprite ) ) {
object.element.style.height = object.userData.bondLengthShort;
}
}
}
//
function colorify( ctx, width, height, color, a ) {
var r = color.r;
var g = color.g;
var b = color.b;
var imageData = ctx.getImageData( 0, 0, width, height );
var data = imageData.data;
for ( var y = 0; y < height; y ++ ) {
for ( var x = 0; x < width; x ++ ) {
var index = ( y * width + x ) * 4;
data[ index ] *= r;
data[ index + 1 ] *= g;
data[ index + 2 ] *= b;
data[ index + 3 ] *= a;
}
}
ctx.putImageData( imageData, 0, 0 );
}
function imageToCanvas( image ) {
var width = image.width;
var height = image.height;
var canvas = document.createElement( 'canvas' );
canvas.width = width;
canvas.height = height;
var context = canvas.getContext( '2d' );
context.drawImage( image, 0, 0, width, height );
return canvas;
}
//
function loadMolecule( url ) {
for ( var i = 0; i < objects.length; i ++ ) {
var object = objects[ i ];
object.parent.remove( object );
if ( object.element.parentNode === renderer.cameraElement ) {
renderer.cameraElement.removeChild( object.element );
}
if ( object.userData.joint ) {
object.userData.joint.parent.remove( object.userData.joint );
}
}
objects = [];
loader.load( url, function ( geometry, geometryBonds ) {
var offset = THREE.GeometryUtils.center( geometry );
geometryBonds.applyMatrix( new THREE.Matrix4().makeTranslation( offset.x, offset.y, offset.z ) );
for ( var i = 0; i < geometry.vertices.length; i ++ ) {
var position = geometry.vertices[ i ];
var color = geometry.colors[ i ];
var element = geometry.elements[ i ];
if ( ! colorSpriteMap[ element ] ) {
var canvas = imageToCanvas( baseSprite );
var context = canvas.getContext( '2d' );
colorify( context, canvas.width, canvas.height, color, 1 );
var dataUrl = canvas.toDataURL();
colorSpriteMap[ element ] = dataUrl;
}
colorSprite = colorSpriteMap[ element ];
var atom = document.createElement( 'img' );
atom.src = colorSprite;
var object = new THREE.CSS3DSprite( atom );
object.position.copy( position );
object.position.multiplyScalar( 75 );
object.billboard = true;
object.matrixAutoUpdate = false;
object.updateMatrix();
root.add( object );
objects.push( object );
}
for ( var i = 0; i < geometryBonds.vertices.length; i += 2 ) {
var start = geometryBonds.vertices[ i ];
var end = geometryBonds.vertices[ i + 1 ];
start.multiplyScalar( 75 );
end.multiplyScalar( 75 );
tmpVec1.subVectors( end, start );
var bondLength = tmpVec1.length() - 50;
//
var bond = document.createElement( 'div' );
bond.className = "bond";
bond.style.height = bondLength + "px";
var object = new THREE.CSS3DObject( bond );
object.position.copy( start );
object.position.lerp( end, 0.5 );
object.userData.bondLengthShort = bondLength + "px";
object.userData.bondLengthFull = ( bondLength + 55 ) + "px";
//
var axis = tmpVec2.set( 0, 1, 0 ).cross( tmpVec1 );
var radians = Math.acos( tmpVec3.set( 0, 1, 0 ).dot( tmpVec4.copy( tmpVec1 ).normalize() ) );
var objMatrix = new THREE.Matrix4().makeRotationAxis( axis.normalize(), radians );
object.matrix = objMatrix;
object.rotation.setEulerFromRotationMatrix( object.matrix, object.eulerOrder );
object.matrixAutoUpdate = false;
object.updateMatrix();
root.add( object );
objects.push( object );
//
var bond = document.createElement( 'div' );
bond.className = "bond";
bond.style.height = bondLength + "px";
var joint = new THREE.Object3D( bond );
joint.position.copy( start );
joint.position.lerp( end, 0.5 );
joint.matrix.copy( objMatrix );
joint.rotation.setEulerFromRotationMatrix( joint.matrix, joint.eulerOrder );
joint.matrixAutoUpdate = false;
joint.updateMatrix();
var object = new THREE.CSS3DObject( bond );
object.rotation.y = Math.PI/2;
object.matrixAutoUpdate = false;
object.updateMatrix();
object.userData.bondLengthShort = bondLength + "px";
object.userData.bondLengthFull = ( bondLength + 55 ) + "px";
object.userData.joint = joint;
joint.add( object );
root.add( joint );
objects.push( object );
}
showAtomsBonds();
render();
} );
}
//
function onWindowResize() {
cameraleft.aspect = window.innerWidth / window.innerHeight;
cameraleft.updateProjectionMatrix();
renderer.setSize( (window.innerWidth/2), window.innerHeight );
render();
}
function animate() {
requestAnimationFrame( animate );
controls.update();
var time = Date.now() * 0.0004;
root.rotation.x = time;
root.rotation.y = time * 0.7;
render();
}
function render() {
renderer.render( scene, cameraleft );
}
</script>
谢谢！