GLGraphics and SimpleOpenNI: Exception

in Contributed Library Questions • 9 months ago

I want to use SimpleOpenNi and GLGraphics together in one sketch. Because I had lots of problems to get it working, I stripped down my program to make the exception reproducable in simple context

import SimpleOpenNI.*;
SimpleOpenNI context;
import processing.opengl.*;
import codeanticode.glgraphics.*;
int[] depthValues;
void setup() {
context = new SimpleOpenNI(this);
// enable depthMap generation
context.enableDepth();
size(640,480,GLConstants.GLGRAPHICS);

// size(640, 480);
background(100);
}
void draw() {
context.update();
depthValues=context.depthMap();
image(context.depthImage(), 0, 0);
}

Running this sketch throws an exception (see below)

Using size(640, 480) instead of size(640,480,GLConstants.GLGRAPHICS);
makes it run.

All examples from SimpleOpenNI and GLGraphics work on my systems.

I am on processing 1.5.1, GLGraphics 1.0.0 and SimpleOpenNi 0.27.

I used Vista32 Bit and XP to test it.

Any help is of course appreciated

knut

Exception in thread "Animation Thread" java.lang.NullPointerException: null array

at SimpleOpenNI.SimpleOpenNIJNI.ContextWrapper_depthMap(Native Method)

at SimpleOpenNI.ContextWrapper.depthMap(ContextWrapper.java:219)

at SimpleOpenNI.SimpleOpenNI.updateDepthRaw(SimpleOpenNI.java:827)

at SimpleOpenNI.SimpleOpenNI.depthMap(SimpleOpenNI.java:432)

at testOpenNiGLGraphics.draw(testOpenNiGLGraphics.java:44)

at processing.core.PApplet.handleDraw(Unknown Source)

at processing.core.PApplet.run(Unknown Source)

at java.lang.Thread.run(Thread.java:662)

I tested this on Vista

Replies(5)

PhiLho

Re: GLGraphics and SimpleOpenNI: Exception

9 months ago

Reminder: size() should be the first call of setup()!
Sometime (or always?), the code before the size() call can be run twice...
I don't know if that's the source of your problem, but it is worth trying...

knutl

Re: GLGraphics and SimpleOpenNI: Exception

9 months ago

Oops, did not know that !

And yes, it was worth trying: The exception disappears when I follow your advice !

Thnx - but:

The sketch now runs for a few seconds (2-3 sec) and then I get an OutOfMemoryError in this

small sketch. My Memory setting in the Prefs is 1600MB.

If I REDUCE my available memory setting in the Preference to 1000MB the sketch runs longer (20 sec)but then I get again an OutOfMemorryError...

Any ideas on that ?

..and strange enough sometimes a get an java.lang.outofmemoryerror, this one

Exception in thread "Animation Thread" java.lang.OutOfMemoryError.

This happens again on vista and xp...

Exception in thread "Animation Thread" java.lang.OutOfMemoryError

at sun.misc.Unsafe.allocateMemory(Native Method)

at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:102)

at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:288)

at com.sun.opengl.util.BufferUtil.newByteBuffer(BufferUtil.java:65)

at com.sun.opengl.util.BufferUtil.copyIntBufferAsByteBuffer(BufferUtil.java:229)

at javax.media.opengl.glu.GLU.copyToByteBuffer(GLU.java:1450)

at javax.media.opengl.glu.GLU.gluBuild2DMipmapsJava(GLU.java:1524)

at javax.media.opengl.glu.GLU.gluBuild2DMipmaps(GLU.java:1581)

at processing.opengl.PGraphicsOpenGL$ImageCache.rebind(Unknown Source)

at processing.opengl.PGraphicsOpenGL.bindTexture(Unknown Source)

at codeanticode.glgraphics.GLGraphics.renderTriangles(Unknown Source)

at processing.core.PGraphics3D.endShape(Unknown Source)

at processing.core.PGraphics.endShape(Unknown Source)

at processing.core.PGraphics.imageImpl(Unknown Source)

at processing.core.PGraphics.image(Unknown Source)

at processing.core.PApplet.image(Unknown Source)

at testOpenNiGLGraphics.draw(testOpenNiGLGraphics.java:47)

at processing.core.PApplet.handleDraw(Unknown Source)

at processing.core.PApplet.run(Unknown Source)

at java.lang.Thread.run(Thread.java:662)

java.lang.OutOfMemoryError
java.lang.OutOfMemoryError
java.lang.OutOfMemoryError

PhiLho

Re: GLGraphics and SimpleOpenNI: Exception

9 months ago

I cannot answer this one as I don't know what the code in draw() is doing: I have never used those libraries.

knutl

Re: GLGraphics and SimpleOpenNI: Exception

9 months ago

I have a kinect connected.

context.update gets - updates the kinect data (here: the depth data from the sensor)

depthValues=context.depthMap(); reads the depthdata to the int array
image(context.depthImage(), 0, 0); displays the depth data as a black-and-white image

But I think I have to check with the guys from SimpleOpenNI and/or GLGraphics. Thnx for your help !

knutl

Re: GLGraphics and SimpleOpenNI: Exception

9 months ago

Just for the documentation:

I did some additional steps:

1. Wanted to use the processing layer lib to be able to use two separate different renderers. That did not work, because

the layer lib does not support OpenGL.

2. Ported my little test sketch form above to eclipse in order to see what happens.

It runs fine, that means: The OutOfMemoryError just disappeared. I will try

to go through the simpleOpenNi user forum to discuss the problem

see:

https://groups.google.com/forum/?fromgroups#!topic/simple-openni-discuss/Aw8J3ArGG6c

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