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Support / integrating JPCT-ae with QCAR(vuforia)
« on: October 18, 2012, 03:27:11 pm »
Hi All
i know what i am going to ask is already discussed sometimes in this forum but after going through all of them i can't found my complete answer so i am asking it in a new thread.
when i tried integrating JPCT with QCAR all goes well as expected, i got my modelview matrix from renderframe from jni and successfully transferred that in java to jpct model is shown perfectly as expected. but when i tried to pass this matrix to JPCT world camera my model disappear.
my code:in onsurfacechanged:
and in ondraw:
after some research i found that QCAR uses a right-handed coordinate system meaning that the X positive goes right, the Y positive goes up and the Z positive comes out of screen but in JPCT coordinate system the X positive goes right, the Y positive goes down and the Z positive goes into the screen.
so please suggest me what i am missing here?
i know what i am going to ask is already discussed sometimes in this forum but after going through all of them i can't found my complete answer so i am asking it in a new thread.
when i tried integrating JPCT with QCAR all goes well as expected, i got my modelview matrix from renderframe from jni and successfully transferred that in java to jpct model is shown perfectly as expected. but when i tried to pass this matrix to JPCT world camera my model disappear.
my code:in onsurfacechanged:
Code: [Select]
world = new World();
world.setAmbientLight(20, 20, 20);
sun = new Light(world);
sun.setIntensity(250, 250, 250);
cube = Primitives.getCube(1);
cube.calcTextureWrapSpherical();
cube.strip();
cube.build();
world.addObject(cube);
cam = world.getCamera();
cam.moveCamera(Camera.CAMERA_MOVEOUT, 10);
cam.lookAt(cube.getTransformedCenter());
SimpleVector sv = new SimpleVector();
sv.set(cube.getTransformedCenter());
sv.y -= 100;
sv.z -= 100;
sun.setPosition(sv);
MemoryHelper.compact();
and in ondraw:
Code: [Select]
com.threed.jpct.Matrix mResult = new com.threed.jpct.Matrix();
mResult.setDump(modelviewMatrix ); //modelviewMatrix i get from Qcar
cube.setRotationMatrix(mResult);
cam.setBack(mResult);
fb.clear(back);
world.renderScene(fb);
world.draw(fb);
fb.display();
after some research i found that QCAR uses a right-handed coordinate system meaning that the X positive goes right, the Y positive goes up and the Z positive comes out of screen but in JPCT coordinate system the X positive goes right, the Y positive goes down and the Z positive goes into the screen.
so please suggest me what i am missing here?