I have never used SimpleUnivers, so I have no quick answer how to set
capabilities, which have not been set to default.
But I suppose that there are no other Transforms done for the Viewplatform Graph
then the one in the TransformGroup above the Viewplatform.
So this transformation will be the LocalToVWorld transform for the ViewPlatform,
which you can use.
regards
Paul
alvaro zabala schrieb:
> Thank you very much, Paul!
>
> But when I tried to run your suggest, I found that It threw a not capibity
> to read
> Local to VWorld transform exception.
>
> When I tried to set this capibility to the
> simpleUniverse.getViewingPlatform().setCapability(vP.ALLOW_READ_LOCALTOVWORL
> D)
>
> I got the exception: Not allowed to set capabilities to a lived or compiled
> Object,
> but
> I DIDN`T ALREADY COMPILE THE BRANCH WHICH THE SimpleUniverse!!
>
> I used this code from the FlyBehavior of the J3DFLy Demo
>
> yawTransform.rotY( yawAngle );
> pitchTransform.rotX( pitchAngle );
> rollTransform.rotZ( rollAngle );
>
> velocityTransform.set( velocity ); //velocity es the
> traslational vector
>
> velocityTransform.mul( yawTransform );
> velocityTransform.mul( pitchTransform );
> velocityTransform.mul( rollTransform );
>
> targetTG.getTransform( targetTransform );
> targetTransform.mul( yawTransform );
> targetTransform.mul( pitchTransform );
> targetTransform.mul( rollTransform );
> targetTransform.mul( velocityTransform );
> targetTG.setTransform( targetTransform );
>
> -----Mensaje original-----
> De: Dipl. Ing. Paul Szawlowski ?[EMAIL PROTECTED]?
> Para: [EMAIL PROTECTED] ?[EMAIL PROTECTED]?
> Fecha: viernes 11 de mayo de 2001 9:05
> Asunto: Re: [JAVA3D] view navigation
>
> ?What you simply have to do is to apply the transformation in the local
> ?coordinate system of the Viewplatform. So you do the following:
> ?
> ?coordinate transformation to local coordinate system -? applying your
> ?transformation matrix -? coordinate transformation back to
> ?virtual coordinate system. Watch order of matrix muliplication.
> ?
> ? myViewplatform . getLocalToVworld( vpTransform );
> ? vpTransform . getRotationScale( itsTempMatrix );
> ? vpTransform . set( itsTempMatrix );
> ? itsTempMatrix.transpose();
> ? tempTransform .set( itsTempMatrix );
> ? tempTransform . mul( myTransform, itsTempTransform );
> ? vpTransform . mul( tempTransform );
> ? // now apply vpTransform to your Viewplatformtransformgroup
> ?
> ?regards
> ?Paul
> ?
> ?
> ?PS: Just for completion: this does not take any Userhead tranformations.
> ?
> ?alvaro zabala schrieb:
> ?
> ?? Hi!
> ??
> ?? I've a problem with view navigation.
> ??
> ?? When I rotate my Virtual Camera, (viewTransf3D.rotZ(angle), for example)
> ?? and after that I want to translate my position to the left
> ?? (position.x+=step)
> ??
> ?? My movement is relative to the absolute reference system!
> ??
> ?? So I move to the East, but in the canvas's view, I don't move to the
> plate?s
> ?? left.
> ??
> ?? Can someone help me?
> ??
> ?? Thanks!
> ?? Regards.
> ??
> ??
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