Point Sprites

[GuillaumeSchmid]

Hello!
I am implementing a tiny demo, and I would like to be able to render Point Geometry.
Like a particle system using GL_POINT for rendering (with point sprites).
The coordinates of the point are re-evaluated at each frames, using some simulation.
The simple thing would be to store the geometry in a buffer and use a simple vertex shader handling point coordinates and GL_PointSize to render the buffer with a custom fragment shader.
I looked briefly how to achieve this, it is a bit different from the point cloud, where a 3D model is associated with each point.
It should be simple and much faster (I will have a lot of points).
Is there a way to achieve this with three-d (a simple way)?.
If not, I could probably add it, but could an expert provide some insight on how to implement this?
I would gladly contribute to the three-d code if I can come up with something that works.

[asny]

It's one of the most asked questions, please see the discussion #310 and also #335 for an elaborate answer. But the conclusion is that you should just render your points the same way as in the point_cloud example, using a 3D model, it is very efficient since it's instanced. You can update the transformation of your instances using InstancedMesh::set_instances.

[GuillaumeSchmid]

Thanks a lot. I will start by doing that.