SegmentArtist.hpp

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/***********************************
   Copyright 2018 Ravishankar Mathur

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
***********************************/

#ifndef _OF_SEGMENTARTIST_
#define _OF_SEGMENTARTIST_

#include <OpenFrames/Export.h>
#include <OpenFrames/TrajectoryArtist.hpp>
#include <osg/LineStipple>
#include <osg/LineWidth>

namespace OpenFrames
{
class OF_EXPORT SegmentArtist : public TrajectoryArtist
{
  public:
    SegmentArtist( const Trajectory *traj = NULL );

    // Copy constructor
    SegmentArtist( const SegmentArtist &ca,
                   const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY );

    virtual Object* cloneType() const { return new SegmentArtist(); }
    virtual Object* clone(const osg::CopyOp& copyop) const { return new SegmentArtist(*this,copyop); }
    virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const SegmentArtist*>(obj)!=NULL; }
    virtual const char* libraryName() const { return "OpenFrames"; }
    virtual const char* className() const { return "SegmentArtist"; }

    virtual void setTrajectory(const Trajectory *traj);

    bool setStartXData(const Trajectory::DataSource &src);
    bool setEndXData(  const Trajectory::DataSource &src);
    bool setStartYData(const Trajectory::DataSource &src);
    bool setEndYData(  const Trajectory::DataSource &src);
    bool setStartZData(const Trajectory::DataSource &src);
    bool setEndZData(  const Trajectory::DataSource &src);

    void setStride(unsigned int stride);
    inline unsigned int getStride() const { return _stride; }

    void setColor(float r, float g, float b);
    void setWidth( float width );
    void setPattern( GLint factor, GLushort pattern );

    virtual void drawImplementation(osg::RenderInfo& renderInfo) const;

    virtual void dataCleared(Trajectory* traj);
    virtual void dataAdded(Trajectory* traj);

  protected:
    virtual ~SegmentArtist();

    virtual osg::BoundingBox computeBoundingBox() const;

    void verifyData() const;

    Trajectory::DataSource _startSource[3]; // Data sources for starting point
    Trajectory::DataSource _endSource[3]; // Data sources for ending point

    unsigned int _stride; // Minimum offset between sucessive drawn points

    osg::ref_ptr<osg::LineWidth> _lineWidth; 
    osg::ref_ptr<osg::LineStipple>  _linePattern;
    float _lineColor[3];

    mutable bool _dataValid; // If trajectory supports required data
    mutable bool _startDataZero;
    mutable bool _endDataZero;
  };

}

#endif