OGL interface optimization


    Oct 20 2006 | 5:05 am
    I apologize for the long post. -matt
    ---------------- INTRO:------------------------------- I'm trying to optimize this interface. Right now it uses 10% of my CPU (even though its on the GPU). I'm not a jitter guy but this is unacceptable. I was hoping to describe what I'm doing and see if theres a better way(less CPU intensive). Why do the complex examples run so smoothly but when I draw 100 lines and my computer slows to a halt? ( 1.33 gHz G4, ATI Mobility Radeon 9700, 4.5&4.6)
    I read, but I didn't understand, this article. http://developer.apple.com/graphicsimaging/opengl/optimizingdata.html
    ---------------- MISC CPU UH- OHS:------------------------------------------------- * Can't turn jit.windowlistener's idlemousing off (even in the example patches) * Just running moving the mouse around an empty max document raises max's cpu 6%-11%
    ---------------- HOW IT WORKS NOW:---------------------------------------------------- The grid is a single jit.gl.sketch using linesegments
    each curve is its own jit.gl.sketch using the following commands beginstroke ("line") strokeparam("color", yada) strokepoint (3x) framecircle endstroke
    the reason I made them separate glsketches is because I don't have to recalc them all when altering a single one.
    I'm using jit.window listener.
    ---------------- WHAT IT LOOKS LIKE:----------------------------------------- Believe it or not, this interface is necessary. If the curves weren't there, the user couldn't discern between overlapping sements. (other ideas welcome) The circles aren't integral. The user can create, hilite, and change the brightness of each curve. I can provide an example but it'll be complicated.
    ---------------- ONLY IF YOU WANT TO KNOW WHAT IT DOES------ its a 2nd degree markov editor, x axis is time, y is drum. each segment represents the transition from 1 xy pair to another. the brightness of the line is the probability of making that transition. I can't think of a different way to represent 5 dimensional data. (fromX,fromY,toX,toY,prob)

    • Oct 20 2006 | 12:22 pm
      hello matt,
      how does the @displaylist 1 attribute for all of your sketches affect performance? it is a part of "Minimize CPU Copies" segment in the link you provided.
      also, checkout 'shapeslice' message for jit.gl.sketch in jitter reference, to lower the number of line segments when drawing circles.
      best, nesa