best way to draw over a million points

OpenGL Development JOGL Development
#1

right now i’ve been doing it the slow way call glColor3f and glVertex3f for each point in a single call, but how to achieve fast performance coz right now my is dreadfull. is glDrawElements something or vertex arrays?.
I’m using a octree for culling unseen points.

cheers,

Paul

#2

If it’s dynamic data, you should use VertexArrays, not VBOs.

Just put your colors and vertices into floatbuffers (and rewind them) upload them to the gfx-card using glVertexPointer/glColorPointer, and then call glDrawArrays.

glDrawElements is for indexed buffers, which you don’t need in this scenario.

#3

Thanks,
Any links to tutorials, or code that demonstrate glVertex/color pointers.

#4

The VertexArrayRange demo in the jogl-demos workspace shows how to use vertex arrays to draw huge numbers of triangles.