104 lines
3.6 KiB
Plaintext
104 lines
3.6 KiB
Plaintext
|
/* -*-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.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* 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 OSGEARTHUTIL_AUTOCLIPPLANEHANDLER_H
|
||
|
|
#define OSGEARTHUTIL_AUTOCLIPPLANEHANDLER_H
|
||
|
|
|
||
|
|
#include <osgEarth/Common>
|
||
|
|
#include <osgEarth/Containers>
|
||
|
|
#include <osgEarth/Utils>
|
||
|
|
#include <osgGA/GUIEventHandler>
|
||
|
|
#include <osgGA/EventVisitor>
|
||
|
|
#include <osg/Camera>
|
||
|
|
|
||
|
|
namespace osgEarth {
|
||
|
|
class MapNode;
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace osgEarth { namespace Util
|
||
|
|
{
|
||
|
|
using namespace osgEarth;
|
||
|
|
using namespace osgEarth::Util;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A CULL callback that automatically adjusts the calculated near and far clip planes for
|
||
|
|
* use in a geocentric map.
|
||
|
|
*
|
||
|
|
* Usage: add this as a cull callback to a camera, like:
|
||
|
|
*
|
||
|
|
* osgViewer::Viewer viewer;
|
||
|
|
* ...
|
||
|
|
* viewer.getCamera()->addCullCallback( new AutoClipPlaneCallback(map) )
|
||
|
|
*/
|
||
|
|
class OSGEARTH_EXPORT AutoClipPlaneCullCallback : public osg::NodeCallback
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
/**
|
||
|
|
* Constructs a new auto-clip plane manager corresponding to the parameters
|
||
|
|
* in the specified map.
|
||
|
|
* @param map Map to take ellipsoid information from; if NULL, use WGS84 values
|
||
|
|
*/
|
||
|
|
AutoClipPlaneCullCallback( MapNode* mapNode =0L );
|
||
|
|
|
||
|
|
virtual ~AutoClipPlaneCullCallback() { }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the minimum near/far ratio to use for this camera. The minimum ratio takes
|
||
|
|
* effect when the camera HAE hits zero.
|
||
|
|
*/
|
||
|
|
void setMinNearFarRatio( double value ) { _minNearFarRatio = value; }
|
||
|
|
double getMinNearFarRatio() const { return _minNearFarRatio; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the maximum near/far ratio to use for the camera. The maximum ratio
|
||
|
|
* takes effect when the camera HAE hits the Height Threshold.
|
||
|
|
*/
|
||
|
|
void setMaxNearFarRatio( double value ) { _maxNearFarRatio = value; }
|
||
|
|
double getMaxNearFarRatio() const { return _maxNearFarRatio; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets the camera Height (above ellipsoide) at which the near/far ratio
|
||
|
|
* hits its maximum value.
|
||
|
|
*/
|
||
|
|
void setHeightThreshold( double value ) { _haeThreshold = value; }
|
||
|
|
double getHeightThreshold() const { return _haeThreshold; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Whether to clamp the the far clipping plane to the approximate
|
||
|
|
* visible horizon.
|
||
|
|
*/
|
||
|
|
void setClampFarClipPlane( bool value ) { _autoFarPlaneClamping = value; }
|
||
|
|
bool getClampFarClipPlane() const { return _autoFarPlaneClamping; }
|
||
|
|
|
||
|
|
public:
|
||
|
|
virtual void operator()( osg::Node* node, osg::NodeVisitor* nv );
|
||
|
|
|
||
|
|
protected:
|
||
|
|
bool _active;
|
||
|
|
double _minNearFarRatio, _maxNearFarRatio;
|
||
|
|
double _haeThreshold;
|
||
|
|
double _rp2, _rp;
|
||
|
|
bool _autoFarPlaneClamping;
|
||
|
|
osg::observer_ptr<MapNode> _mapNode;
|
||
|
|
PerObjectFastMap< osg::Camera*, osg::ref_ptr<osg::CullSettings::ClampProjectionMatrixCallback> > _clampers;
|
||
|
|
};
|
||
|
|
|
||
|
|
} }
|
||
|
|
|
||
|
|
#endif // OSGEARTHUTIL_AUTOCLIPPLANEHANDLER_H
|