raypicker.h

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//=============================================================================================================
 
#ifndef RAYPICKER_H
#define RAYPICKER_H
 
//=============================================================================================================
// INCLUDES
//=============================================================================================================
 
#include "../disp3D_global.h"
 
#include "core/viewstate.h"
 
#include <QPoint>
#include <QRect>
#include <QMatrix4x4>
#include <QVector3D>
#include <QMap>
#include <QStandardItem>
 
#include <memory>
 
namespace DISP3DLIB
{
 
class BrainSurface;
class DipoleObject;
 
//=============================================================================================================
struct DISP3DSHARED_EXPORT RayHit
{
    bool hit = false;      
    float distance = 0.0f; 
    QVector3D hitPoint;    
 
    QStandardItem* item = nullptr; 
    QString surfaceKey;            
    int vertexIndex = -1;          
 
    bool isDipole = false; 
    int dipoleIndex = -1;  
 
    // FsAnnotation info (brain surfaces only)
    QString regionName; 
    int regionId = -1;  
 
    //=========================================================================================================
    QString displayLabel() const;
};
 
//=============================================================================================================
class DISP3DSHARED_EXPORT RayPicker
{
public:
    //=========================================================================================================
    static bool unproject(const QPoint& screenPos,
                          const QRect& paneRect,
                          const QMatrix4x4& pvm,
                          QVector3D& rayOrigin,
                          QVector3D& rayDir);
 
    //=========================================================================================================
    static RayHit pick(const QVector3D& rayOrigin,
                       const QVector3D& rayDir,
                       const SubView& subView,
                       const QMap<QString, std::shared_ptr<BrainSurface>>& surfaces,
                       const QMap<const QStandardItem*, std::shared_ptr<BrainSurface>>& itemSurfaceMap,
                       const QMap<const QStandardItem*, std::shared_ptr<DipoleObject>>& itemDipoleMap);
 
    //=========================================================================================================
    static QString buildLabel(const RayHit& result,
                              const QMap<const QStandardItem*, std::shared_ptr<BrainSurface>>& itemSurfaceMap,
                              const QMap<QString, std::shared_ptr<BrainSurface>>& surfaces);
};
 
} // namespace DISP3DLIB
 
#endif // RAYPICKER_H