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[英]Three.js Applying a random image to each of the faces of each cube in a group of cubes
[英]Cube of Cubes in Three.JS
我刚刚开始使用 THREE.js,我正在尝试制作一个由立方体制成的“立方体”,类似于:
我正在尝试使用遵循以下结构的 3D 数组来完成此操作: [[grid][line,line][[cube,cube],[cube,cube]]]
。 如在,立方体由网格组成,网格由线组成,线由立方体本身组成。 这是代码:
function lineOfMeshes(w, g) {
var cubes = [];
for (var i = 0; i < w; i++) {
cubes.push(new THREE.Mesh(geometry, material));
cubes[i].position.x += i * g;
}
//console.log("LINE:" + cubes);
return cubes;
}
function gridOfMeshes(w, g) {
cubes = [];
for (var line = 0; line < w; line++) {
cubes.push(lineOfMeshes(w, g));
for (var cube = 0; cube < w; cube++) {
cubes[line][cube].position.z += line * g;
}
}
//console.log("GRID: " + cubes);
return cubes;
}
function cubeOfMeshes(w, g) {
cubes = [];
for (var grid = 0; grid < w; grid++) {
cubes.push(gridOfMeshes(w, g));
for (var line=0;line<w;line++) {
for (var cube = 0; cube < w; cube++) {
cubes[grid][line][cube].position.z += line * g;
}
}
}
//console.log("CUBE"+ cubes);
return cubes;
}
//var container = document.getElementById("3dcontainer");
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / window.innerHeight,
0.1,
1000
);
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
var controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.autoRotate = true;
var geometry = new THREE.BoxGeometry(); //object that contains all the points and faces of the cube
var material = new THREE.MeshBasicMaterial({ color: 0x00ff00 }); //material that colors the box
//var cube = new THREE.Mesh(geometry, material); //a mesh is an object that takes a geometry and applies a material to it
///////////////////////////////////////////////////////
let gridWidth = 5;
let gridGap = 3;
cubes = cubeOfMeshes(gridWidth, gridGap);
cubes.forEach(grid => {
grid.forEach(line => {
line.forEach(cube=>{
scene.add(cube);
})
});
});
camera.position.z = 5;
///////////////////////////////////////////////////////
//render loop
function animate() {
requestAnimationFrame(animate);
controls.update();
renderer.render(scene, camera);
}
animate();
但是,当我运行它时,它给出了错误:
index.js:31 Uncaught TypeError: Cannot read property 'position' of undefined
at cubeOfMeshes (index.js:31)
at index.js:65
我不确定为什么会这样。 我相信我索引正确。 任何帮助表示赞赏,在此先感谢您。
这是因为在gridOfMeshes
和cubeOfMeshes
您没有将const
、 let
或var
放在cubes
前面,因此它们实际上是相同的变量并被覆盖
注意:如果添加
'use strict';
在 JavaScript 的顶部,它会在JavaScript 控制台中指出这个错误
Uncaught ReferenceError: cubes is not defined
at cubeOfMeshes (js:40)
at js:80
此外,如果您使用Visual Studio Code 之类的编辑器并安装了 eslint 插件。 您可能需要对其进行配置,但如果您花几分钟进行设置,它会在您键入时突出显示这些类型的错误。
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