DtLocalMetadataPublisher.h

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/****************************************************************************** 
** Copyright (c) 2012 VT-MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 

#pragma once

#include <vrvLocalMS/vrvLocalMS.h>

#include <vrvVideoStream/DtMetadataPublisher.h>
#include <vrvVideoStream/DtMetadataElement.h>

namespace makVrv
{
   class DtDe;

   class DT_DLL_VRVLOCALMS DtLocalMetadataPublisher : public DtMetadataPublisher
   {
   public: 

      friend class DtLocalMetadataPublisherCreator;

      virtual ~DtLocalMetadataPublisher();

      virtual void tick( double dt );

      // Velocity of object attached to, if attached, in Database (local)
      // coordinates
      virtual DtVector attachedVelocity();

      // Get the wind direction, from 0-360. Used by multiple elements
      virtual double windDirection();

      // Get the wind speed (m/s). Used by multiple elements
      virtual double windSpeed();

      virtual bool haveValidUpperLeftCorner() const;
      virtual bool haveValidUpperRightCorner() const;
      virtual bool haveValidLowerRightCorner() const;
      virtual bool haveValidLowerLeftCorner() const;

      virtual DtVector upperLeftCorner() const;
      virtual DtVector upperRightCorner() const;
      virtual DtVector lowerRightCorner() const;
      virtual DtVector lowerLeftCorner() const;

      // What direction is the camera looking
      virtual DtVector calcLookAt(double hfov, double vfov );

      // Get the horizontal and vertical field of view in radians
      virtual void getFieldsOfView(double& hfov, double& vfov );
   protected:

      DtLocalMetadataPublisher( DtDe& de, const DtVideoStream& videoStream );

      DtLocalMetadataPublisher();

      virtual void updateTargetCorners();

      virtual void updateAttachedVelocity(double dt);

      virtual DtVector getFrustumVector(int corner);

      unsigned int calcChecksum(unsigned char* buffer, unsigned int length);

      void setChecksum(unsigned char* buffer, unsigned int length, unsigned int checksum);

   protected:
      DtVector myAttachedVelocity;
      DtVector myAttachedLastPosition;

      bool myValidUpperLeftCorner;
      bool myValidUpperRightCorner;
      bool myValidLowerRightCorner;
      bool myValidLowerLeftCorner;
      DtVector myUpperLeftCorner;  // point 1 in standard
      DtVector myUpperRightCorner; // point 2 in standard
      DtVector myLowerRightCorner; // point 3 in standard
      DtVector myLowerLeftCorner;  // point 4 in standard
   };

   class DT_DLL_VRVLOCALMS DtLocalMetadataPublisherCreator : public DtMetadataPublisherCreator
   {
   public:
      DtLocalMetadataPublisherCreator();

      virtual ~DtLocalMetadataPublisherCreator();

      virtual DtMetadataPublisher* create( DtDe& de, const DtVideoStream& videoStream );
   };
}