Drawing “point-like” shapes in OpenGL, indifferent to zoom

Question

I\'m working with Qt and QWt3D Plotting tools, and extending them to provide some 3-D and 2-D plotting functionality that I need, so I\'m learning some OpenGL in the process.

Answer 1

There's no easy way to do what you want to do. You'll have to dynamically resize the primitives you're drawing depending on the camera's current zoom. You can use a technique known as billboarding to make sure that your objects always face the camera.