我正在尝试用three.js中的globe设置我的场景的图像背景,但不幸的是,当我这样做时,我的场景的主要对象也变成了黑色(背景颜色相同。
我使用的方法:
renderer = new THREE.WebGLRenderer({ antialias: false, alpha:true });
这使默认背景透明。然后我在CSS部分添加了图像背景。
我对场景的整个脚本如下所示:
var container, stats;
var camera, scene, renderer;
var group;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.getElementById( 'container' );
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 2000 );
//closer
camera.position.z = 500;
scene = new THREE.Scene();
group = new THREE.Group();
scene.add( group );
// earth
var loader = new THREE.TextureLoader();
loader.load( 'textures/mapnew1.jpg', function ( texture ) {
var geometry = new THREE.SphereGeometry( 180, 32, 32 );
var material = new THREE.MeshBasicMaterial( { map: texture, overdraw: 0.5 } );
var mesh = new THREE.Mesh( geometry, material );
group.add( mesh );
} );
// shadow
var canvas = document.createElement( 'canvas' );
canvas.width = 128;
canvas.height = 128;
var context = canvas.getContext( '2d' );
var gradient = context.createRadialGradient(
canvas.width / 2,
canvas.height / 2,
0,
canvas.width / 2,
canvas.height / 2,
canvas.width / 2
);
gradient.addColorStop( 0.1, '#000000' );
gradient.addColorStop( 1, '#000000' );
context.fillStyle = gradient;
context.fillRect( 0, 0, canvas.width, canvas.height );
var texture = new THREE.CanvasTexture( canvas );
var geometry = new THREE.PlaneBufferGeometry( 300, 300, 3, 3 );
var material = new THREE.MeshBasicMaterial( { map: texture, overdraw: 0.5 } );
var mesh = new THREE.Mesh( geometry, material );
mesh.position.y = - 200;
mesh.rotation.x = - Math.PI / 2;
group.add( mesh );
renderer = new THREE.CanvasRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer = new THREE.WebGLRenderer({ antialias: false, alpha:true });
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setClearColor(0x000000, 0);
container.appendChild( renderer.domElement );
stats = new Stats();
container.appendChild( stats.dom );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
//
window.addEventListener( 'resize', onWindowResize, 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 );
mouseY = ( event.clientY - windowHalfY );
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
camera.position.x += ( mouseX - camera.position.x ) * 0.08;
camera.position.y += ( - mouseY - camera.position.y ) * 0.08;
camera.lookAt( scene.position );
group.rotation.y -= 0.003;
renderer.render( scene, camera );
}
</script>
这是我的CSS:
body {
color: #ffffff;
font-family:'Futura';
font-size:20px;
text-align: center;
background-image: url(textures/starfield.png);
background-color: black;
margin: 0px;
overflow: hidden;
}
您是否有任何想法如何解决它并使全球可见?
非常感谢!
答案 0 :(得分:1)
关于背景图片,您要为alpha
设置WebGLRenderer
值,这是正确的。您没有发布CSS,但确保在container
上设置背景图片,而不是在画布上。
另外,请注意这一行:
renderer.setClearColor(0x000000, 0);
您不需要设置清晰的颜色,因为您要清除透明度而不是颜色。这应解决背景图片问题。
关于全黑模型,您需要在场景中使用灯光。尝试将此添加到您的init
方法:
var light = new THREE.PointLight(0xffffff, 1, Infinity);
camera.add(light);
这将在相机位置添加光源(并在相机移动时跟随相机)。
编辑以添加代码段
var container, stats;
var camera, scene, renderer;
var group;
var mouseX = 0,
mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.getElementById('container');
camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 1, 2000);
//closer
camera.position.z = 500;
var light = new THREE.PointLight(0xffffff, 1, Infinity);
camera.add(light);
scene = new THREE.Scene();
group = new THREE.Group();
scene.add(group);
// earth
var loader = new THREE.TextureLoader();
loader.crossOrigin = '';
loader.load('https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Equirectangular_projection_SW.jpg/640px-Equirectangular_projection_SW.jpg', function(texture) {
var geometry = new THREE.SphereGeometry(180, 32, 32);
var material = new THREE.MeshBasicMaterial({
map: texture,
overdraw: 0.5
});
var mesh = new THREE.Mesh(geometry, material);
group.add(mesh);
});
// shadow
var canvas = document.createElement('canvas');
canvas.width = 128;
canvas.height = 128;
var context = canvas.getContext('2d');
var gradient = context.createRadialGradient(
canvas.width / 2,
canvas.height / 2,
0,
canvas.width / 2,
canvas.height / 2,
canvas.width / 2
);
gradient.addColorStop(0.1, '#000000');
gradient.addColorStop(1, '#000000');
context.fillStyle = gradient;
context.fillRect(0, 0, canvas.width, canvas.height);
var texture = new THREE.CanvasTexture(canvas);
var geometry = new THREE.PlaneBufferGeometry(300, 300, 3, 3);
var material = new THREE.MeshBasicMaterial({
map: texture,
overdraw: 0.5
});
var mesh = new THREE.Mesh(geometry, material);
mesh.position.y = -200;
mesh.rotation.x = -Math.PI / 2;
group.add(mesh);
renderer = new THREE.WebGLRenderer({
antialias: false,
alpha: true
});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
//renderer.setClearColor(0x000000, 0);
container.appendChild(renderer.domElement);
stats = new Stats();
container.appendChild(stats.dom);
document.addEventListener('mousemove', onDocumentMouseMove, false);
//
window.addEventListener('resize', onWindowResize, 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);
mouseY = (event.clientY - windowHalfY);
}
//
function animate() {
requestAnimationFrame(animate);
render();
stats.update();
}
function render() {
camera.position.x += (mouseX - camera.position.x) * 0.08;
camera.position.y += (-mouseY - camera.position.y) * 0.08;
camera.lookAt(scene.position);
group.rotation.y -= 0.003;
renderer.render(scene, camera);
}
body {
color: #ffffff;
font-family: 'Futura';
font-size: 20px;
text-align: center;
background-image: url(https://upload.wikimedia.org/wikipedia/commons/6/62/Starsinthesky.jpg);
background-color: black;
margin: 0px;
overflow: hidden;
}
<script src="https://threejs.org/build/three.js"></script>
<script src="https://threejs.org/examples/js/renderers/Projector.js"></script>
<script src="https://threejs.org/examples/js/libs/stats.min.js"></script>
<div id="container"></div>
three.js r86
答案 1 :(得分:1)
有一段时间,有:
var texture = new THREE.TextureLoader().load( "textures/bg.jpg" );
scene.background = texture;
我使用three.js v 0.87
答案 2 :(得分:1)
有两种方法可以做到
1)使用TextureLoader
加载图像并将其设置为背景。这将导致静态背景,看起来可能不太现实。
var texture = new THREE.TextureLoader().load(
"https://images.pexels.com/photos/110854/pexels-photo-110854.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940"
);
scene.background = texture;
2)使用skybox
为顶部,左侧,右侧底部,正面背面加载图像。然后将它们设置在立方体或球体几何内部
var urls = [
"https://images.pexels.com/photos/110854/pexels-photo-110854.jpeg",
"https://images.pexels.com/photos/110854/pexels-photo-110854.jpeg",
"https://images.pexels.com/photos/110854/pexels-photo-110854.jpeg",
"https://images.pexels.com/photos/110854/pexels-photo-110854.jpeg",
"https://images.pexels.com/photos/110854/pexels-photo-110854.jpeg",
"https://images.pexels.com/photos/110854/pexels-photo-110854.jpeg"
];
var materialArray = [];
for (var i = 0; i < 6; i++)
materialArray.push(
new THREE.MeshBasicMaterial({
map: new THREE.TextureLoader().load(urls[i]),
side: THREE.BackSide
})
);
var skyGeometry = new THREE.SphereGeometry(400, 32, 32);
var skyMaterial = new THREE.MeshFaceMaterial(materialArray);
var skybox = new THREE.Mesh(skyGeometry, skyMaterial);
scene.add(skybox);
这将使球体的背面具有图像纹理。只需将THREE.SphereGeometry
替换为THREE.CubeGeometry
,就可以模拟envMap。