我正在尝试在运行时交换一个加载的3.js .obj的图像纹理.以下是来自three.js示例的代码,稍作修改：
var container,stats;
var camera,scene,renderer;
var mouseX = 0,mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 45,window.innerWidth / window.innerHeight,1,2000 );
camera.position.z = 100;
//scene
scene = new THREE.Scene();
var ambient = new THREE.AmbientLight( 0x101030 );
scene.add( ambient );
var directionalLight = new THREE.DirectionalLight( 0xfFeedd );
directionalLight.position.set( 0,1 );
scene.add( directionalLight );
//manager
var manager = new THREE.LoadingManager();
manager.onProgress = function ( item,loaded,total ) {
console.log( item,total );
};
//model
var loader = new THREE.OBJLoader( manager );
loader.load( 'obj/female02/female02.obj',function ( object ) {
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh ) {
//create a global var to reference later when changing textures
myMesh = child;
//apply texture
myMesh.material.map = THREE.ImageUtils.loadTexture( 'textures/ash_uvgrid01.jpg');
myMesh.material.needsUpdate = true;
}
} );
object.position.y = - 80;
scene.add( object );
} );
//render
renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth,window.innerHeight );
container.appendChild( renderer.domElement );
document.addEventListener( 'mousemove',onDocumentMouseMove,false );
window.addEventListener( 'resize',onWindowResize,false );
}
function newTexture() {
myMesh.material.map = THREE.ImageUtils.loadTexture( 'textures/land_ocean_ice_cloud_2048.jpg');
myMesh.material.needsUpdate = true;
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth,window.innerHeight );
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowHalfX ) / 2;
mouseY = ( event.clientY - windowHalfY ) / 2;
}
//animate
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
camera.position.x += ( mouseX - camera.position.x ) * .05;
camera.position.y += ( - mouseY - camera.position.y ) * .05;
camera.lookAt( scene.position );
renderer.render( scene,camera );
}
我添加的唯一的东西是newTexture函数和网格的引用作为myMesh.这是原始的例子(http://threejs.org/examples/webgl_loader_obj.html).该函数不会抛出任何错误,但是.obj不会更新.我知道我只是在这里错过了一些基本的东西.
更新：根据下面的优秀答案,以下是正确的代码,通过输入字段交换纹理的一些补充：
var container,stats;
var camera,renderer;
var mouseX = 0,mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var globalObject;
init();
animate();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.PerspectiveCamera(45,2000);
camera.position.z = 100;
//scene
scene = new THREE.Scene();
var ambient = new THREE.AmbientLight( 0x101030 );
scene.add( ambient );
var directionalLight = new THREE.DirectionalLight( 0xfFeedd );
directionalLight.position.set( 0,1 );
scene.add( directionalLight );
//manager
var manager = new THREE.LoadingManager();
manager.onProgress = function (item,total) {
console.log( item,total );
};
//model
var loader = new THREE.OBJLoader( manager );
loader.load( 'obj/female02/female02.obj',function (object) {
//store global reference to .obj
globalObject = object;
object.traverse( function (child) {
if ( child instanceof THREE.Mesh ) {
child.material.map = THREE.ImageUtils.loadTexture( 'textures/grid.jpg');
child.material.needsUpdate = true;
}
});
object.position.y = - 80;
scene.add( object );
});
//render
renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth,window.innerHeight );
container.appendChild( renderer.domElement );
document.addEventListener( 'mousemove',false );
window.addEventListener( 'resize',false );
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth,window.innerHeight );
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowHalfX ) / 2;
mouseY = ( event.clientY - windowHalfY ) / 2;
}
//animate
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
camera.position.x += ( mouseX - camera.position.x ) * .05;
camera.position.y += ( - mouseY - camera.position.y ) * .05;
camera.lookAt( scene.position );
renderer.render( scene,camera );
}
function newTexture() {
var newTexturePath = "textures/" + document.getElementById("texture").value + "";
globalObject.traverse( function ( child ) {
if (child instanceof THREE.Mesh) {
//create a global var to reference later when changing textures
child;
//apply texture
child.material.map = THREE.ImageUtils.loadTexture(newTexturePath);
child.material.needsUpdate = true;
}
});
}
