With OSX I am getting crashes about 15 seconds after I run the applet i got running today.

I get this data for the crash:

Invalid memory access of location 00000000 eip=95394029



I tried it on three different macs, 2 running snow leopard and one running leopard. I ran the app also on an XP machine, and there it worked fine.

app is drawing a object in space which is controlled by and accelerometer.

the object draw uses both
javax.media.opengl
processing.opengl

the report for Apple says this about the thread which crashed



Thread 18 Crashed:
0   libGL.dylib                        0x95394029 glClearColor + 41
1   libjogl.jnilib                      0x238c3510 Java_com_sun_opengl_impl_GLImpl_glClearColor__FFFF + 38
2   ???                                0x03587d07 0 + 56130823
3   ???                                0x0357fcd9 0 + 56098009
4   ???                                0x0357f9d3 0 + 56097235
5   ???                                0x03667f30 0 + 57048880
6   ???                                0x036693a8 0 + 57054120
7   ???                                0x03648640 0 + 56919616
8   ???                                0x03641dfc 0 + 56892924
9   ???                                0x03649a10 0 + 56924688
10  ???                                0x035f1dc0 0 + 56565184
11  ???                                0x0357fcd9 0 + 56098009
12  ???                                0x0357d227 0 + 56087079
13  libclient.dylib                    0x004d228a 0x3b9000 + 1151626
14  libclient.dylib                    0x004d1fa6 0x3b9000 + 1150886
15  libclient.dylib                    0x0045c2dc 0x3b9000 + 668380
16  libclient.dylib                    0x005c6cba JNI_CreateJavaVM_Impl + 96746
17  librxtxSerial.jnilib                0x25d0a0e7 send_event + 113 (SerialImp.c:4851)
18  librxtxSerial.jnilib                0x25d0b182 report_serial_events + 83 (SerialImp.c:3956)
19  librxtxSerial.jnilib                0x25d0d5a3 Java_gnu_io_RXTXPort_eventLoop + 186 (SerialImp.c:4132)
20  ???                                0x03587d07 0 + 56130823
21  ???                                0x0357f9d3 0 + 56097235
22  ???                                0x0357d227 0 + 56087079
23  libclient.dylib                    0x004d228a 0x3b9000 + 1151626
24  libclient.dylib                    0x00416343 0x3b9000 + 381763
25  libclient.dylib                    0x00416235 0x3b9000 + 381493
26  libclient.dylib                    0x00416175 0x3b9000 + 381301
27  libclient.dylib                    0x00416098 0x3b9000 + 381080
28  libclient.dylib                    0x0067d935 JVM_RaiseSignal + 441077
29  libSystem.B.dylib                  0x90274204 _pthread_body + 27


below is the app's 3-d code


import javax.media.opengl.*;
import processing.opengl.*;
import processing.serial.*;

Serial myPort;        // The serial port

int count = 3;

boolean start = false;

float last[] = {
 0,0,0};
PGraphicsOpenGL pgl = null;

void setup () {
 // set the window size:
 size(800, 600,OPENGL);
 fill(0, 153);
 noStroke();    
 pgl = (PGraphicsOpenGL) g;
}
void draw () {
 float n, angle;
 float down[]={0,1,0};
 float axis[]={0,0,0};
 float gravity[] = {0,0,0};
 
 // shift to get readings centered about zero
 gravity[0] = last[2] - 1023*1.670/5;
 gravity[1] = last[1] - 1023*1.678/5;
 gravity[2] = last[0] - 1023*1.660/5;
 
 //normalize, we only care about direction
 n = sqrt(gravity[0]*gravity[0] + gravity[1]*gravity[1] + gravity[2]*gravity[2]);

 if(n<10) return;

 gravity[0] = gravity[0]/n;
 gravity[1] = gravity[1]/n;
 gravity[2] = gravity[2]/n;
 
 //print(gravity[0] + " " + gravity[1] + " " + gravity[2]);
 //println();
 
 //Cross product (a2b3 ‚àí a3b2, a3b1 ‚àí a1b3, a1b2 ‚àí a2b1).
 axis[0] = down[1]*gravity[2] - down[2]*gravity[1];
 axis[1] = down[2]*gravity[0] - down[0]*gravity[2];
 axis[2] = down[0]*gravity[1] - down[1]*gravity[0];
 
 angle = acos(-1*gravity[1])*180/PI;

 //print(axis[0] + " " + axis[1] + " " + axis[2] + ":" + angle);
 //println();
 
 pgl = (PGraphicsOpenGL) g;
 //print(pgl);
 if(pgl != null)
 {
     // g may change
   GL gl = pgl.beginGL();  // always use the GL object returned by beginGL
   //println(" " + gl);
   background(255);
 
   gl.glColor4f(0.7, 0.7, 0.7, 0.8);
   gl.glTranslatef(width/2, height/2, -400);
   gl.glRotatef(angle, axis[0], axis[1], axis[2]);
   gl.glRotatef(90, 1, 0, 0);
   gl.glRectf(-200, -200, 200, 200);
   pgl.endGL();
 }
}