sandbox: Threejs basic example (forked) - CodeSandbox const buffer = new Float32Array([0,0,0, 1,1,0, 2,0,0, 1,-1,0]) const material = new LineMaterial({ color: 0xffffff }) const geometry = new LineGeometry() geometry.setPositions(buffer) const line = new Line2(geometry, material) // Would like to…

Thus, you need to do something like this: setTimeout(() => { geometry.attributes.instanceEnd.setY(0, 0.5); geometry.attributes.instanceStart.setY(1, 0.5); geometry.attributes.instanceStart.needsUpdate = true geometry.attributes.instanceEnd.needsUpdate = true }, 500)

Hi! Maybe this post will be helpful: Out of control memory when updating position of lines within animate function - #5 by prisoner849

thanks! this is almost the solution, i wonder though, in that box you use multiple lines with instanceStart and instanceEnd, whereas i have a single lineSegments ([0,0,0, 1,1,0, 2,0,0, 1,-1,0]). what does instanceStart and End mean exactly in my case, since my LineGeometry has four vectors?

made a small sandbox to demonstrate the behaviour: Threejs basic example (forked) - CodeSandbox

AFAIK, FatLines in its core uses instancing. So each segment is an instance of a plane (I think), that has instanced values for its start and its end. When you create fat lines, it internally creates an instanced mesh or a mesh with InstancedBufferGeometry (not sure which one). How it processed in …

moving more than the first point seems to be really tricky. do you think it makes even sense to mess with internals or should i just call setPositions every frame, though i seems to me it would re-create buffers in that case, seems expensive and wasteful …

[image] drcmda: call setPositions every frame That’s what the OP of this topic did, and had problems with growing of memory.

thanks for the help! really appreciate it! i figured it out, non-indexed segments always break my head :smile:

You’re welcome :handshake: :slightly_smiling_face:

I’ve asked this on the post prisoner849 mentioned on May 7, '22, but I’m writing here too: Had the same problem, and still don’t know though If it’s possible to animate a line2 with more than 2 points, or even with a dynamically assigned new set of points each frame. It feels like this should be a …

How to update Line2 dynamically?

Questions

prisoner849 May 7, 2022, 1:48pm 8

That’s what the OP of this topic did, and had problems with growing of memory.

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How to update Line2 dynamically?

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