Consider the following code snippet:
var geometry = new THREE.BoxGeometry( larguraX,altura,comprimentoZ);
var material = new THREE.MeshBasicMaterial( {color: "pink"} );
var mmesh = new THREE.Mesh( geometry, material );
var objj = new THREE.Object3D();
objj.add(mmesh);
...
Have you ever wondered why executing this:
mmesh.translateX(50);
mmesh.rotateY(Math.PI/2);
does not produce a similar result to the outcome of this:
objj.translate(50);
objj.rotateY(Math.PI/2);
They are identical.
Observe how the red and blue cubes are perfectly aligned, creating a purple box.
'use strict';
/* global THREE */
function main() {
const canvas = document.querySelector('#c');
const renderer = new THREE.WebGLRenderer({canvas: canvas});
const fov = 75;
const aspect = 2;
const near = 0.1;
const far = 200;
const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
camera.position.set(50, 0, 2);
const scene = new THREE.Scene();
const boxWidth = 1;
const boxHeight = 1;
const boxDepth = 1;
const geometry = new THREE.BoxGeometry(boxWidth, boxHeight, boxDepth);
const material1 = new THREE.MeshBasicMaterial({
color: 'red', transparent: true, opacity: 0.5,
});
const material2 = new THREE.MeshBasicMaterial({
color: 'blue', transparent: true, opacity: 0.5,
});
const cube1 = new THREE.Mesh(geometry, material1);
const cube2 = new THREE.Mesh(geometry, material2);
const obj = new THREE.Object3D();
scene.add(cube1);
scene.add(obj);
obj.add(cube2);
cube1.translateX(50);
cube1.rotateY(Math.PI / 2);
obj.translateX(50);
obj.rotateY(Math.PI / 2);
renderer.render(scene, camera);
}
main();<canvas id="c"></canvas>
<script src="https://threejsfundamentals.org/threejs/resources/threejs/r94/three.min.js"></script>You may want to include additional code snippets.
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