/* -*-c++-*- */
/* osgEarth - Geospatial SDK for OpenSceneGraph
* Copyright 2020 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTH_ANNOTATION_GEO_POSITION_NODE_AUTO_SCALER_H
#define OSGEARTH_ANNOTATION_GEO_POSITION_NODE_AUTO_SCALER_H 1

#include <osgEarth/Common>
#include <osg/NodeCallback>
#include <osg/Vec3d>

namespace osgEarth
{
    /**
     * A CULL callback you can install on a GeoPositionNode that will
     * automatically scale the annotation from scene coordinates to 
     * screen coordinates.
     *
     * Important: ONLY install this on a GeoPositionNode, or else you will
     * get a crash -- it does NO type checking.
     *
     * geoPosNode->addCullCallback( new GeoPositionNodeAutoScaler() );
     *
     * @deprecated - replace with osgEarth::AutoScaleCallback, and support
     * with a scale() method no GeoPositionNode et al
     */
    class OSGEARTH_EXPORT GeoPositionNodeAutoScaler : public osg::NodeCallback
    {
    public:
        GeoPositionNodeAutoScaler(const osg::Vec3d& baseScale = osg::Vec3d(1,1,1), double minScale = 0.0, double maxScale = DBL_MAX);

    public: // osg::NodeCallback

        void operator()(osg::Node* node, osg::NodeVisitor* nv);

    protected:
        osg::Vec3d _baseScale;
		double _minScale;
		double _maxScale;
    };

} // namespace

#endif //OSGEARTH_ANNOTATION_GEO_POSITION_NODE_AUTO_SCALER_H