Thanks for the tip! I've tried to use the worldToScreen method but it doesn't seem to be working. This is my function call:
when I try to add a viewpoint (normal rectangle) it still gives the same result.
ofRectangle rect(ofVec3f(0,0,0),10000, 10000 );
Am I still doing something wrong in the function call?
I printed out some of the converted vectors compared to the original ones, this is what I got:
The z doesn't change to 0 while I did place the plane on z= 0.