[osg-users] second newbie question (UNCLASSIFIED)

Brian R Hill bhill22 at csc.com
Thu Mar 12 08:41:53 PDT 2009


We need to see what drawLines( tri, 0 ) is doing.


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-----osg-users-bounces at lists.openscenegraph.org wrote: -----

To: "OpenSceneGraph Users" <osg-users at lists.openscenegraph.org>
From: "Konkle, Daniel T AMRDEC/Dynetics" <Daniel.Konkle at us.army.mil>
Sent by: osg-users-bounces at lists.openscenegraph.org
Date: 03/12/2009 11:38AM
Subject: [osg-users] second newbie question (UNCLASSIFIED)

Classification:  UNCLASSIFIED
Caveats: NONE

In insight would be welcome.

So I'm drawing several triangles on my scene.

here is the code that draws the first 2.

I'm reusing the first same geode.

The strange thing is that the 'right triangle' is a different color
than the 'left triangle' (light green)

I'm actually drawing 2 others and they are black too.

I need them to be green.

Can anyone tell me what I'm doing wrong?  It makes no sense to me.


     osg::Vec3Array* tri = new osg::Vec3Array;
     tri->push_back(osg::Vec3(0.0f, -0.1f, depth));
    tri->push_back(osg::Vec3(0.1f, 0.0f, depth));
    tri->push_back(osg::Vec3(0.0f, 0.1f, depth));

     osg::ref_ptr<osg::Geode> triangle = new osg::Geode();
    triangle->addDrawable( drawLines( tri, 0 ) );

     // right triangle

       osg::ref_ptr<osg::MatrixTransform> translate = new
       osg::Matrix tran_mat = osg::Matrix::translate( hud_aspect,
0.0f, 0.0f );
       translate->setMatrix( tran_mat );

       osg::ref_ptr<osg::MatrixTransform> rotate = new
       osg::Matrix rot_mat = osg::Matrix::rotate( M_PI, 0.0f, 0.0f,
       rotate->setMatrix( rot_mat );

       translate->addChild( rotate.get() );
       rotate->addChild( triangle.get() );;

    // left triangle
       osg::Matrix m;
       osg::ref_ptr<osg::MatrixTransform> mt = new
       m.makeTranslate( -hud_aspect, 0.0f, 0.0f );
       mt->setMatrix( m );
       mt->addChild( triangle.get() );.

Classification:  UNCLASSIFIED
Caveats: NONE

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