HI Srikanth,
Please split your separate questions into separate posts.
Robert.
On Wed, May 7, 2008 at 2:22 AM, Srikanth Bemineni
<[EMAIL PROTECTED]> wrote:
>
> Hi
>
> How do we fill color in a drawn object.Here I am trying to draw a circle
> and also I want to fill it with yellow color.
>
> 1.What do you mean by actually setting this array ?
> setTexCoordArray(0, texcoords);
>
>
> 2.What are these values or co-ordinates ?
> (*texcoords)[j].set( 40.50f, 40.0f );
>
> Even the tutorial doesn't have proper explanation for this
>
> 3.Can we support CGM(Computer Graphic Metadatafile) or Postscript importing
> of the screen ?
>
> 4.I am trying to antalias or draw smooth lines but the opengl is not
> drawing the lines smoothly even if I have set Stateset ?
> osg::StateSet* StateSet = new osg::StateSet();
> osg::ref_ptr<osg::Hint> antialias = new osg::Hint(GL_LINE_SMOOTH_HINT,
> GL_NICEST);
> StateSet->setAttributeAndModes(antialias.get(),
> osg::StateAttribute::ON);
> what Am I doing wrong here ?
>
>
>
> Srikanth Bemieni
>
>
>
> /*****************************************************************************/
> //degree to radian conversion
> const float DEG2RAD = 3.14159/180;
> osg::Geode* circle = new osg::Geode;
>
> osg::Geometry* circleGeom = new osg::Geometry; //circle geometery
> circle->addDrawable( circleGeom );
> osg::Vec3Array* circleArray = new osg::Vec3Array;
>
> //To calculate circle points
> //here it is every 30 degrees 12 point circle or polygon what ever
> int radius = 1000;
> for (int i=0; i < 360; i = i + 30 )
> {
> float degInRad = i*DEG2RAD;
> circleArray->push_back(
> osg::Vec3(cos(degInRad)*radius,0,sin(degInRad)*radius ) );
> }
>
> circleGeom->setVertexArray( circleArray );
>
> //attaching the points
> osg::DrawElementsUInt* circleelementobj = new osg::DrawElementsUInt(
> osg::PrimitiveSet::LINE_LOOP, 0 );
>
> osg::Vec4Array* ccolors = new osg::Vec4Array;
> osg::TemplateIndexArray <unsigned int, osg::Array::UIntArrayType,4,4>
> *colorIndexArray;
> colorIndexArray =new osg::TemplateIndexArray<unsigned int,
> osg::Array::UIntArrayType,4,4>;
>
> osg::Vec2Array* texcoords = new osg::Vec2Array(360/30);
>
> for( int j=0 ; j < 360/30 ; j++ )
> {
> circleelementobj->push_back( j );
> ccolors->push_back(osg::Vec4(1.0f, 1.0f, 0.0f, 1.0f) ); //index 0
> redi
> (*texcoords)[j].set( 40.50f, 40.0f ); //I really didn't get what to
> do just copied from the tutorial
> }
>
> circleelementobj->push_back( 0 );
>
> for( int k = 0 ; k < 360 /30 ; k++ )
> {
> colorIndexArray->push_back(0);
> }
>
>
> ccolors->push_back(osg::Vec4(1.0f, 1.0f, 0.0f, 1.0f) ); //index 0 red
>
> circleGeom->addPrimitiveSet( circleelementobj );
>
> circleGeom->setColorArray(ccolors);
> circleGeom->setColorIndices(colorIndexArray);
> circleGeom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
> circleGeom->setTexCoordArray(0, texcoords);
>
> osg::PositionAttitudeTransform* circleXForm =
> new osg::PositionAttitudeTransform();
>
>
> circleXForm->setPosition(osg::Vec3( 4000 ,0, 4100 ));
> root->addChild(circleXForm);
> circleXForm->addChild( circle );
>
>
> /*****************************************************************************************************************/
>
> --
> With Regards
> Srikanth Bemineni
> Geotrace Technologies
> 281-497-8440 extn 228
>
>
>
>
>
>
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>
>
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