I’m trying to allow the user to navigate through the scene from a FPS camera view (Universal camera), while pointer locked, and any mesh they hover will show a description of the mesh. I have this code all written already, but out of the blue it’s extremely laggy (see: Javascript behaves differently…

You will need to build it from scratch. From this forum: GPU Picking with mouse coordinate Turn off scene pick onPointerDown and onPointerUp Get accurate FacetData from mesh that is animated by a Skeleton Concave Mesh Collisions

You could define exactly which meshes to pick every frame: meshes.forEach(mesh=> { const pick = ray.intersectsMesh(mesh, false); // do stuff with pick });

The scene.pick() method returns the closest mesh, which is still the functionality I’m needing. If I displayed a hover for each mesh that the ray intersects it would display the hover text for every mesh that the ray intersects, as opposed to only displaying for the closest mesh.

In your case, a GPU picking could work because the picking occurs always at the same location: the center of the screen. So, you could render each mesh with a different flat color to a render target texture and setup a camera viewport / scissor test to only render a very small part of the scene, na…

That would be ideal! I’m not seeing any documentation for GPU picking anywhere, is that something I will have to build from scratch or do you know where would be the best place to find more information on this?

Awesome, thanks! I’m surprised a built in GPU picking doesn’t already exist :thinking:

Well, you are free to contribute :wink:

hey i test it in 2016 [image] GPU picking System hi in this topic we try to solve all problem in GPU picking system i think we have this questions : 1. how can pick changed vertex in gpu side 2. what information we can fetch https://www.babylonjs-playground.co…

Wow, great work! It’s way over my head at the moment, but I’ll start working on it. Thank you!

Hey morterra, any update on this? I’m currently using scene.pick and for 10-15 elements that have to be picked the whole scene freezes for about 300 to 1500 ms when I’m doing this. scene.pick (ray.intersectsMesh is also slower than scene.pick) is not ideal at all :frowning:

a second for only 15 elements sounds like a lot :frowning: could you provide a repro in the playground ?

Speeding up scene.pick() on renderloop

Questions

Evgeni_Popov August 11, 2020, 7:09am 6

You will need to build it from scratch. From this forum:

GPU Picking with mouse coordinate
Turn off scene pick onPointerDown and onPointerUp
Get accurate FacetData from mesh that is animated by a Skeleton
Concave Mesh Collisions

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Speeding up scene.pick() on renderloop

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