I know this is possible, but I have no idea how to implement it. 

http://www.opengl.org/resources/code/samples/mjktips/rts/index.html

Here is a good starting point:

2. import processing.opengl.*;
3. 
   
4. void setup() {
5. size(400, 400, OPENGL);
6. camera(300, 300, 150, 100, 100, 50, 1, 1, 0);
7. smooth();
8. noStroke();
9. }
10. 
    
11. void draw() {
12. rotateZ(frameCount/30.5);
13. background(0);
14. directionalLight(255, 255, 255, 0, -200, -100);
15. fill(255);
16. rect(-150, -150, 300, 300);
17. sphere(50);
18. //imitation shadow
19. fill(10,100); translate(0,0,1); ellipse(0,-25,100,120); translate(0,0,-1);
20. }

Does anyone know to create such smooth arcs?

Thanks for your help!

Link to Exhibit "Realtime Information Graphics"   http://projects.zumkuckuck.com/realtime/

I am using the GLModel library to make a model with several thousand lines ( example here). I am trying to make some lines appear thicker than others within the same model. 

I saw the setLineWidth() function and like how it expands the line cylindrically. Unfortunately, it increases the size of all lines in the model. I saw the  linearComb() function from the PDBView example, but I could not figure out how to use it. Is there a way to increase the width of only certain lines within the model?

Thank you so much for your help!!

Dave

I am drawing over 30,000 lines and want to make the rendering process more efficient. When I rotate the stage in 3D, I currently have to re-draw every singe line, which causes heavy lags.

I know theres got to be a more efficient way to do this, and I was hoping you might have some advice.

Thanks you so much for your time and input!

Below is a simple sketch that illustrates the re-draw inefficiency: