我试图弄几个小时,为什么我看不到多维数据集内的文本,也看不出为什么它不起作用。
有两个网格,其中一个在另一个内部,但不可见。
当我注释将立方体网格添加到组中的行时,将显示文本(第34行)。如果从材料中删除“ transparent:true”,则可以看到文本,但是会出现背景(第52行)。
文本作为画布纹理添加,这是我发现动态添加2d文本的最简单方法。
我只想在我的多维数据集内添加一些白色文本,而没有任何背景色。
我看到了这个问题,但看起来与我的问题无关:THREE.JS:在网格内部时看到几何
var renderer, scene, camera, cubeGroup;
var rotationX = 0;
var rotationY = 0;
var percentX, percentY;
var container = document.getElementById('container');
init();
animate();
function init(){
renderer = new THREE.WebGLRenderer({alpha: true});
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor( 0x000000, 1);
document.getElementById('container').appendChild(renderer.domElement);
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 10000);
camera.position.set(0, 0, 1000);
scene.add(camera);
// group
cubeGroup = new THREE.Group();
// cube
var geometry = new THREE.BoxGeometry(200, 200, 200);
var material = new THREE.MeshPhongMaterial({
color: 0x11111f,
side: THREE.DoubleSide,
opacity: .5,
transparent: true
});
var mesh = new THREE.Mesh(geometry, material);
cubeGroup.add(mesh); // Comment this and the text appears with transparency
var ambientLight = new THREE.AmbientLight(0x999999, 0.8);
scene.add(ambientLight);
// text
var bitmap = document.createElement('canvas');
var g = bitmap.getContext('2d');
bitmap.width = 256;
bitmap.height = 256;
g.font = '80px Arial';
g.fillStyle = 'white';
g.fillText('text', 20, 80);
var geometry = new THREE.PlaneGeometry(180, 180);
var texture = new THREE.CanvasTexture(bitmap);
var material = new THREE.MeshStandardMaterial({
map: texture,
transparent: true // Comment this and the text appears - but with background
});
var mesh2 = new THREE.Mesh(geometry, material);
cubeGroup.add(mesh2);
// add group to scene
scene.add(cubeGroup);
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 animate(now){
requestAnimationFrame(animate);
cubeGroup.rotation.y += (rotationX - cubeGroup.rotation.y) * 0.05;
cubeGroup.rotation.x += (rotationY - cubeGroup.rotation.x) * 0.05;
renderer.render(scene, camera);
}
function findViewCoords(mouseEvent)
{
var xpos;
var ypos;
var w = window.innerWidth;
var h = window.innerHeight;
var centerX = w/2;
var centerY = h/2;
if (mouseEvent)
{
xpos = mouseEvent.pageX - document.body.scrollLeft;
ypos = mouseEvent.pageY - document.body.scrollTop;
}
else
{
xpos = window.event.x + 2;
ypos = window.event.y + 2;
}
var diffX = xpos - centerX;
var diffY = ypos - centerY;
percentX = diffX / centerX;
percentY = diffY / centerY;
rotationX = percentX/2;
rotationY = percentY/2;
}
container.addEventListener("mousemove", findViewCoords);
body {
margin: 0;
padding: 0;
overflow: hidden;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/84/three.js"></script>
<div id="container"></div>
发生这种情况的原因是three.js中的渲染分两个阶段进行。
首先呈现固体物质,然后呈现透明物质。
透明物体按照它们与相机的距离排序。
因此,通过设置.transparent = true; 您正在使文本在第二遍过程中呈现,从而呈现在其他几何图形的顶部。
顽强的西兰利(West Langley)给出以下答案:
本文收集自互联网,转载请注明来源。
如有侵权,请联系 [email protected] 删除。
我来说两句