ThreeJS几何翻转 [英] ThreeJS geometry flipping

问题描述

我面临着几何翻转出了问题，我试着用负标技术，翻转，但它失败。

I am facing a problem with geometry flipping, I tried flipping using the negative scale technique but it fails.

什么是我可以用它来预测各轴翻转3D对象的技术？

What is the technique that I can use to flip a 3d object across specific axis?

翻转我的意思是对象应该是因为它是呈现了一面镜子。

By flipping I mean the object should look as it was rendered over a mirror.

如果这是不可能通过three.js渲染怎么用搅拌机来实现这一目标？

if this is not possible through three.js rendering how can I use Blender to achieve this?

推荐答案

您必须转换矩阵应用于几何体（或网/对象），这里是plannar一个例子（O，Y，Z）symetry，你能适应您的具体情况。

You have to apply a transformation matrix to the geometry (or mesh/object), here is an example for plannar (O, y, z) symetry, you can adapt for your specific case

var mS = (new THREE.Matrix4()).identity();
//set -1 to the corresponding axis
mS.elements[0] = -1;
//mS.elements[5] = -1;
mS.elements[10] = -1;

geometry.applyMatrix(mS);
//mesh.applyMatrix(mS);
//object.applyMatrix(mS);

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