As an example, when I point right to the marker the Model View Matrix I get from Native code is:

0.9893   0.0969    0.1082    0.0
0.0383   0.5448   -0.8376    0.0
-0.1401  0.8329  0.5353      0.0
38.0428 32.4253 206.1972   1.0

Hi,

I still get a "null" object.

I set the collision mode as .setCollisionMode(Object3D.COLLISION_CHECK_OTHERS);
and .setCollisionOptimization(true).

In the touch event handler I call
SimpleVector ray = reproject2D3DWS(cam, fb, (int)xpos, (int)ypos, toFill).normalize();
where the function is written as in the post you linked.

Howevere, when I then call
Object[] result = objects[i].world.calcMinDistanceAndObject3D(cam.getPosition(), ray, 10000);
but result[1] is always NULL, even if I point to the marker and the cube occupies the entire screen.

Probably I am missing something when I pass the matrix from native code to java code. For instance I never set the camera position.
Any idea?

thanks a lot

Hi there,

I am developing an Augmented Reality App that makes use of Vuforia Qualcomm SDK to detect marker detection and JPCT to overlap some 3D object over the real-scene marker.

I am using Vuforia for Android as AR engine and passing the ModelViewMatrix up to Java in order to be used by JPCT-AE. I do everything following the tutorial at http://www.jpct.net/wiki/index.php/Integrating_JPCT-AE_with_Vuforia and it works fine.

I am now trying to detect if an object is "receiving" a touch event from the user, so to do some processing with it.
I guess what I am trying to do is something like things in this thread http://www.jpct.net/forum2/index.php?topic=2461.0.
Unfortunately I'm not being able to make it work, since the calcMinDistanceAndObject3D method always returns NULL.

Could you help me with it, maybe sharing some code?
Should I do anything with the ModelViewMatrix in the JNI before passing it to Java?