Hi Anthony,
I got a feeling that you should be using 3
TransformGroups when doing the rotations:
transformX.rotX(x_angle);
transformY.rotY(y_angle);
modelTrans.mul(transformX, modelTrans);
modelTrans.mul(transformY, modelTrans);
transformGroup.setTransform(modelTrans);
Which then updates the actual 'transformGroup'
The above snip is from the java3d demo app FourByFour
-PickDragBehavior class file.
HTH,
Greg.
--- Anthony Arobone <[EMAIL PROTECTED]> wrote:
> Hi all,
> I'm trying to do some rotation and translations
> with one TransformGroup object. First I rotate
> around the Y ( to give yaw ), then I want to rotate
> around the new local Z ( to give roll ). But the
> rotate around the Z is rotating around the original
> Z not the newly create Z. I know this is how it is
> supposed to act, but I can't figure out how to get
> my rotation done on the local coord Z instead of the
> original. Here is a snip of code:
>
> // Save position before move
> mTransformGroup.getTransform( mTranslate );
> mTranslate.get( mLastPosition );
>
> // Do yaw rotation
> mDeltaRadiansY = <calc new delta radians to
> rotate by>;
> mRotate.rotY( mDeltaRadiansY );
> mTranslate.mul( mRotate );
>
> // Do roll rotation
> if ( (mDeltaRadiansZ != 0) ) {
> mDeltaRadiansZ = -mDeltaRadiansZ * 0.19;
> mRotate.rotZ( mDeltaRadiansZ );
> mTranslate.mul( mRotate );
> mDeltaRadiansZ = 0;
> }
>
> // Set delta point and transform
> mDeltaVector.set( 0, 0, mDeltaTranslate );
> mTranslate.transform( mDeltaVector );
>
> <calc new mDeltaVector from collision detection>
>
> // Change actual object
> mLastPosition.add( mDeltaVector );
> mTranslate.setTranslation(mLastPosition);
> mTranslate.normalize();
> mTransformGroup.setTransform(mTranslate);
>
>
> Thanks All,
> Anthony
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