翻转几何后翻转法线Three.JS [英] Flip Normals Three.JS after flipping geometry

问题描述

我遵循这个stackoverflow示例：

I followed this stackoverflow example: ThreeJS geometry flipping

I successfully mirrored my geometry. However now my geometry is black. Can I flip my normals at the same time as the geometry to correct this? Or should I have used a different approach to mirror the geometry from the beginning?

EDIT:

Tried adding the updates to this code and still have inverted geometry.

#transformation
mS.elements[5] = -1;
mesh.applyMatrix(mS);

#updates
mesh.geometry.verticesNeedUpdate = true;
mesh.geometry.normalsNeedUpdate = true;
mesh.geometry.computeBoundingSphere();
mesh.geometry.computeFaceNormals();
mesh.geometry.computeVertexNormals();

解决方案

mesh.geometry.verticesNeedUpdate = true;
mesh.geometry.normalsNeedUpdate = true;
mesh.geometry.computeBoundingSphere();
mesh.geometry.computeFaceNormals();
mesh.geometry.computeVertexNormals();

https://github.com/mrdoob/three.js/wiki/Updates

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