Hi Paul;
>So in OSG first of all I try to do it with a <osg::Switch> but seems that
this node accumulate the transformations... is that right?
What do you mean about osg::Switch. It's not specific feaute on accumulating
trasformation for osg::Switch as I know. It actual target is switching node
while rendering scene graph.
What type gridOrientation is?
Be careful while multiplying the matricies because precedence is important
for kind of these operations : result = rotation * translation;
Regards.
Ümit Uzun
2009/7/17 Pau Moreno Font <tekka...@gmail.com>
> Hi,
>
> I'm trying to change my OGL code to OSG but I'm having really problems with
> the transformations... I have 174 data files that each contains a cloud of
> points, a vector3 with the translartion, and the matrix of rotation of each
> cloud. So in OGL, i just do:
>
> {
> LoadFile( x++) //Loads a diferent file in each
> iteration
> glPushMatrix();
> glTranslate( x , y , z )
> glMultMatrixf( rotation );
>
> glBegin( GL_POINTS )
> ........
> glEnd();
> glPopMatrix();
> }
>
>
> So in OSG first of all I try to do it with a <osg::Switch> but seems that
> this node accumulate the transformations... is that right?? So what I
> finally do is to attach a diferent node in each iteration and detach the
> previous one. But the real problem is that OSG is not doing the same as OGL.
> I do this for each node:
>
> {
> osg::Matrixf rotation;
> osg::Matrixf translation;
> osg::Matrixf result;
>
> rotation.set( gridOrientation.get( 0 , 0 ) , gridOrientation.get( 0 , 1
> ) , gridOrientation.get( 0 , 2 ) , 0.0,
> gridOrientation.get( 1 , 0 ) , gridOrientation.get( 1
> , 1 ) , gridOrientation.get( 1 , 2 ) , 0.0,
> gridOrientation.get( 2 , 0 ) , gridOrientation.get( 2
> , 1 ) , gridOrientation.get( 2 , 2 ) , 0.0,
> 0.0f , 0.0f , 0.0f , 1.0f );
> translation.setTrans( x , y , z );
>
> result = rotation * translation;
>
> osg::MatrixTransform * transformation = new osg::MatrixTransform();
>
> transformation->addChild( gNode );
> transformation->setMatrix( result );
> }
>
>
> rotationOGL.makeRotate( osg::DegreesToRadians(90.0) , osg::Vec3d( 0.0 , 1.0
> , 0.0 ));
> transformationOGL->setMatrix(rotationOGL);
> transformationOGL->addChild(m_root);
> m_vViewer.setSceneData( transformationOGL );
>
> m_root->addChild( transformation );
>
> .....
>
>
> What I'm doing wrong? I've tried a lot of combinations of creating rotation
> , translation, result, but no one is the correct!! I think I'm doing
> something wrong I cannot apreciate.
>
>
> Thanks!!
>
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>
>
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