Removing drawn MeshComponent

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Can I remove drawn MeshComponent when marker is not visible and then set it 
again? How can I do that?

Original issue reported on code.google.com by k.kar...@mobilefactory.com on 1 Jul 2011 at 11:26

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The way i would do that, would be to create a subclass of Component which 
checks if the marker was visible the last x ms. This could be done by setting a 
flag in the Component to true every time the marker is detected and the 
Component will set it to false after x ms via the update method.

Original comment by simon.heinen on 1 Jul 2011 at 1:38

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Ok, so, which method checks if the marker was detected? In main loop in 
DetectionThread is called method nativelib.detectMarkers(frame, mat, 
frameHeight, frameWidth,false), but it returns something else.

Original comment by k.kar...@mobilefactory.com on 1 Jul 2011 at 1:52

[GoogleCodeExporter]

Just extend a MarkerDetectionSetup like in the MarkerDemos project and register 
a callback listener like the CameraMarker or the VirtualObjectMarker class in 
the _a3_registerMarkerObjects method. If you need to display something on the 
marker take a closer look at the VirtualObjectMarker. I would recommend to use 
this one and create a subclass to additionally set the detection flag to true 
every time the marker is recognized. first understand what happens in the 2 
setups in the MarkerDemos project, then it should be easy to start

Original comment by simon.heinen on 4 Jul 2011 at 6:35

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Thanks, it works! One more question, where can I get position of drawn 
MeshComponent?

Original comment by k.kar...@mobilefactory.com on 20 Jul 2011 at 2:39

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Ok it depends now which setup you are using;) if you are moving the camera with 
the marker around you can just place any objects wherever you want around the 0 
vector. If you use the marker to calculate the position in relation to the 
virtual camera (by using the VirtualObjectMarker) then i would recommend to 
change the mesh to a MeshGroup object and put meshes inside it. Then you would 
be able to move the meshes inside the marker coordinate system (so the 0 vector 
would be the center of the marker and all the meshes inside the mesh-group will 
have their local coordinate system). Then just do something like this: 
subMesh.myPosition=new Vec(0,0,2) to let the sub-mesh fly above the marker

Original comment by simon.heinen on 20 Jul 2011 at 11:35

• Changed state: Accepted