jReality - the forum

Hello all, I was wondering, what is the best (read: fastest) way to display about a million 3D points? I'm trying to calibrate a model of a robot with its physical version, and it would be really handy to be able to overlay the physical one onto the model to see where they don't line up.

The fastest standard way is to use a PointSetFactory to create an instance of PointSet which you can then put into a scene graph component. See this tutorial for how to do that.

For rendering purposes make sure that the Appearance attribute CommonAttributes.SPHERES_DRAW is set to false. Use the attribute CommonAttributes.POINT_SIZE to control the size of the displayed points. See this tutorial for more details on the default point shader.

That worked wonderfully, thanks! For future readers, the other thing I had to set was VERTEX_DRAW to true.

If you display a PointSet and SPHERES_DRAW=false then the jogl3-backend uses displacement mapped sprites, i.e. looks like spheres but is billboard and thus rather fast.