coVRLabel.h

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/* This file is part of COVISE.
 
   You can use it under the terms of the GNU Lesser General Public License
   version 2.1 or later, see lgpl-2.1.txt.
 
 * License: LGPL 2+ */
 
#ifndef CO_VR_LABEL
#define CO_VR_LABEL
 
// label always faces viewer
// line is z axis
//
//    | TEXT
//    |
//    |
 
#include <osg/Vec3>
#include <osg/Vec4>
#include <osg/Array>
 
namespace osg
{
class MatrixTransform;
class Geode;
class Geometry;
};
 
namespace osgText
{
class Text;
};
 
#include "coBillboard.h"
#include <util/coExport.h>
namespace opencover
{
class COVEREXPORT coVRLabel
{
 
private:
    osg::MatrixTransform *posTransform;
    osg::ref_ptr<coBillboard> billboard;
    osg::Geode *geode;
    osgText::Text *text;
    float offset;
    osg::Vec3Array *lc, *qc;
    osg::Geometry *lineGeoset, *quadGeoset;
    osg::Geode *label;
    osg::Vec3 position;
    bool keepPositionInScene;
    float distanceFromCamera;
    bool moveToCam;
    bool depthScale;
 
    osg::Vec3f moveToCamera(const osg::Vec3f &point, float distance);
 
public:
    // creates scene graph
    //
    //         scene
    //           |
    //         posTransform
    //           |
    //      coBillboard
    //       |      |
    //    coText lineGeode
    //           |      |
    //      lineGeoset quadGeoset
    coVRLabel(const char *name, float fontsize, float lineLen, osg::Vec4 fgcolor, osg::Vec4 bgcolor);
    ~coVRLabel();
 
    // after construction you may decide to attach posTransform to
    // a given osg::Group *anchor instead of cover->getScene()
    // but manipulate the position of the label as if
    // it were attached to the scene
 
    // Does not work correctly!!!!!
 
    void reAttachTo(osg::Group *anchor);
 
    // position in world coordinates
    void setPosition(const osg::Vec3 &pos);
    void setPositionInScene(const osg::Vec3 &pos);
 
    // move label towards camera to keep above geometry
    void keepDistanceFromCamera(bool enable, float distanceFromCamera = 50.0f);
 
    // rotation mode
    /*  enum RotationMode
        {
            STOP_ROT = 0,
            AXIAL_ROT,
            POINT_ROT_EYE,
            POINT_ROT_WORLD
        };*/
 
    void setRotMode(coBillboard::RotationMode mode);
    //RotationMode getMode() const;
 
    // update the linelen
    void setLineLen(float lineLen);
 
    // update the label string
    void setString(const char *name);
 
    void setFGColor(osg::Vec4 fgc);
 
    // show label
    void show();
 
    // hide label
    void hide();
 
    // show line
    void showLine();
 
    // hide line
    void hideLine();
    // RotationMode _mode;
 
    void update();
 
    void setDepthScale(bool s) { depthScale = s; }
};
}
#endif