BulletClosestRayCallback.h

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#ifndef BulletClosestRayCallback_h
#define BulletClosestRayCallback_h

#include <QScopedPointer>
#include <QString>
#include <QVector>

#include "Constants.h"
#include "IException.h"
#include "IsisBullet.h"
#include "SurfacePoint.h"

namespace Isis {

class BulletTargetShape;

  class BulletClosestRayCallback : public btCollisionWorld::ClosestRayResultCallback {
    public:
      BulletClosestRayCallback();
      BulletClosestRayCallback(const BulletClosestRayCallback &result, const btVector3 &point,
                               const btVector3 &normal);
      BulletClosestRayCallback(const btVector3 &observer, const btVector3 &lookdir);
      BulletClosestRayCallback(const btVector3 &observer, const btVector3 &lookdir,
                               const btCollisionWorld::RayResultCallback &source, 
                               btCollisionWorld::LocalRayResult &rayResult, 
                               bool nornmalInWorldSpace);
      virtual ~BulletClosestRayCallback();

      bool isValid() const;

      btVector3 observer() const;
      btVector3 lookdir() const;

      btScalar  fraction() const;
      btVector3 point() const;
      btVector3 normal() const;
      int       triangleIndex() const;
      int       partId() const;

      btScalar distance() const;
      btScalar distance(const BulletClosestRayCallback &other) const;
      btScalar distance(const btVector3 &other) const;
      bool operator==(const BulletClosestRayCallback &other) const;

      bool isVisible(const BulletClosestRayCallback &other,
                      const btScalar tolerance = DBL_MAX) const;

      const BulletTargetShape *body() const;

    protected:
      btVector3 m_point;         
      btVector3 m_normal;        
      int       m_triangleIndex; 
      int       m_partId;        
      virtual btScalar addSingleResult(btCollisionWorld::LocalRayResult &rayResult, 
                                       bool normalInWorldSpace);

    private:
      unsigned int defaultFlags() const;
      void copyRayResult(btCollisionWorld::RayResultCallback &dest, 
                         const btCollisionWorld::RayResultCallback &source);

  };

} // namespace Isis

#endif