Three.js 中的 verticesNeedUpdate [英] verticesNeedUpdate in Three.js

问题描述

我想使用 dat.GUI 来操作网格顶点的坐标.

I want to use dat.GUI to manipulate the coordinates of a mesh vertices.

起初我以为我可以删除我的网格的每一帧来重新创建它们，但后来我看到了 此处 这不是一个好方法.

At first I thought I could have removed every frame my meshes to recreate them anew, but then I saw here that it's not a good way.

我应该使用 verticesNeedUpdate 吗?Three.js文档上好像没有

Is verticesNeedUpdate that I should use? It seems not to be on Three.js documentation

推荐答案

如果您的几何图形是 THREE.Geometry，那么您可以使用这样的模式更新顶点:

If your geometry is THREE.Geometry, then your can update the vertices by using a pattern like so:

geometry.vertices[ 0 ].set( x, y, z );

geometry.verticesNeedUpdate = true;

如果你的几何是THREE.BufferGeometry，那么你可以使用这个模式:

If your geometry is THREE.BufferGeometry, then you can use this pattern:

geometry.attributes.position.setXYZ( index, x, y, z );

geometry.attributes.position.needsUpdate = true;

在任何一种情况下，如果几何体之前已经渲染过，您只需要设置 needsUpdate 标志.

In either case, you only need to set the needsUpdate flag if the geometry has been previously-rendered.

此外，您不能调整缓冲区大小；您只能更改数据值.有关其他信息，请参阅 Wiki 文章如何更新事物.

Also, you cannot resize buffers; you can only change the data values. See the Wiki article How to Update Things for additional information.

three.js r.85

three.js r.85

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