Hello All,

I'm doing a quick Histogram of a webcam feed.  The brightness of the pixels translates into the length of a line in the z direction.  The following code runs OK in P3D:

********
import processing.video.*;

Capture webCam;

int vidW = 320;
int vidH = 240;
int winX = vidW*2;
int winY = vidH*2;
int DIAMETER=2;
int W=width/2;
int H=height/2;
String render;

void setup() {
 size(winX, winY, P3D);
 println(Capture.list());
 String captureDevice = "IIDC FireWire Video";
 webCam = new Capture(this, captureDevice, vidW, vidH, 30);
}


void captureEvent(Capture webCam) {
 webCam.read();
}

void draw() {

 int row;
 int pix[] = webCam.pixels;
 color c;
 int r,g,b;
 float bri;  

 background(0);
 translate(vidW/2, vidH/2);

 for(int y=0; y<vidH; y+=2) {
   row = y*vidW;
   for(int x=0; x<vidW; x+=2) {  
     c = pix[row + x];
     b = (c & 0x000000FF)    ;
     g = (c & 0x0000FF00)>>8 ;
     r = (c & 0x00FF0000)>>16;
     bri = (r+g+b)/3.0;
     stroke(bri, bri, bri, 20);
     line (x, y, 0, x, y, bri-5);
     stroke(255,0,0, bri);
     point(x, y, bri);
   }
 }
}
********

If I import the OPENGL library and run the code, it runs smoother, but the points are behave erratically.  Only a few points appear and seemingly in random places.

Any ideas why the points don't render correctly in OPENGL?  What mistake am I doing?