Hello, It’s not clear to me from the docs when I should use mesh.setVerticesData vs. mesh.updateVerticesData. I have a tessellated plane mesh I’m changing the vertex positions of, and I was using updateVerticesData. Then I made another version and I accidentally used setVerticesData. Everything st…

cc @sebavan , I’m not sure there’s a big perf hit to use updatable vs non-updatable buffers, if any. So, if the buffers must be updated, even infrequently, I think it’s better to create them as updatable from start.

You must use setVerticesData() the first time (probably not a surprise). I have only been able to use updateVerticesData() afterward, and when the size of the data has not changed. I imagine update being better as long as it is possible. One thing I have not tried is using replacing with somethin…

updateVerticesData is better for perf when you can use it, see my answer here: [image] Correct/performant way to build my own mesh/geometry? Questions mesh.setVerticesData creates a new VertexBuffer each time it is called. So, if you have to update data each frame, it’s b…

Thank you. One more question regarding the “updatable” aspect of a mesh’s geometry. I don’t need to update my vertex positions every frame, just every few seconds (a few hundred frames). During those few seconds of nothing happening, is there a performance penalty for having updatable == true? In o…

I do think that in most cases updatable won’t harm :slight_smile:

Is there such a thing anymore of “pinned memory”, which can be directly accessed by both cpu & gpu? Think the updateable arg maybe an indicator to use that memory when true. I make sure I only set it to true when mesh has morphing data / shapekeys, which will always be the same # of tris. No sens…

When/how to use setVerticesData vs. updateVerticesData

Questions

Evgeni_Popov June 26, 2023, 9:11pm 3

updateVerticesData is better for perf when you can use it, see my answer here:

Topic		Replies	Views
Most efficient way to update vertex buffer? Questions	2	937	February 19, 2022
setVerticesData about dynamic vertices data Questions tutorial , material	5	213	December 27, 2023
setVerticesData and getVerticesData Questions mesh	2	783	September 19, 2022
Can someone explain me the updateable flag in applyToMesh? Questions engine , mesh	1	75	May 31, 2024
Issue with updating vertices data of plane Questions	4	966	February 8, 2019

When/how to use setVerticesData vs. updateVerticesData

Related topics