osgEarth::Features::ScaleFilter Class Reference

Inheritance diagram for osgEarth::Features::ScaleFilter:

Collaboration diagram for osgEarth::Features::ScaleFilter:

List of all members.

Public Member Functions
	ScaleFilter ()
	ScaleFilter (double scale)
double	scale () const
double &	scale ()
virtual FilterContext	push (FeatureList &input, FilterContext &cx)
Protected Attributes
double	_scale

---

Detailed Description

The scale filter is kind of a poor-man's buffer. It simply scales and re-centers the feature geometry within its envelope.

Definition at line 35 of file ScaleFilter.

---

Constructor & Destructor Documentation

ScaleFilter::ScaleFilter

(

)

Definition at line 26 of file ScaleFilter.cpp.

                         :
_scale( 0.0 )
{
    //NOP
}

ScaleFilter::ScaleFilter

(

double

scale

)

Definition at line 32 of file ScaleFilter.cpp.

                                       :
_scale( scale )
{
    //NOP
}

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Member Function Documentation

FilterContext ScaleFilter::push	(	FeatureList &	input,
		FilterContext &	cx
	)		[virtual]

Implements osgEarth::Features::FeatureFilter.

Definition at line 39 of file ScaleFilter.cpp.

{
    for( FeatureList::iterator i = input.begin(); i != input.end(); ++i )
    {
        Feature* input = i->get();
        if ( input && input->getGeometry() )
        {
            Bounds envelope = input->getGeometry()->getBounds();

            // now scale and shift everything
            GeometryIterator scale_iter( input->getGeometry() );
            while( scale_iter.hasMore() )
            {
                Geometry* geom = scale_iter.next();
                for( osg::Vec3dArray::iterator v = geom->begin(); v != geom->end(); v++ )
                {
                    double xr = (v->x() - envelope.xMin()) / envelope.width();
                    v->x() += (xr - 0.5) * _scale;

                    double yr = (v->y() - envelope.yMin()) / envelope.height();
                    v->y() += (yr - 0.5) * _scale;
                }
            }
        }
    }

    return cx;
}

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double osgEarth::Features::ScaleFilter::scale

(

)

const [inline]

Definition at line 41 of file ScaleFilter.

{ return _scale; }

double& osgEarth::Features::ScaleFilter::scale

(

)

[inline]

Definition at line 42 of file ScaleFilter.

{ return _scale; }

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Member Data Documentation

double osgEarth::Features::ScaleFilter::_scale [protected]

Definition at line 48 of file ScaleFilter.

---

The documentation for this class was generated from the following files:

• /home/cube/sources/osgearth/src/osgEarthFeatures/ScaleFilter
• /home/cube/sources/osgearth/src/osgEarthFeatures/ScaleFilter.cpp