raypicker.h

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//=============================================================================================================
 
#ifndef RAYPICKER_H
#define RAYPICKER_H
 
//=============================================================================================================
// INCLUDES
//=============================================================================================================
 
#include "../disp3D_rhi_global.h"
 
#include "core/viewstate.h"
 
#include <QPoint>
#include <QRect>
#include <QMatrix4x4>
#include <QVector3D>
#include <QMap>
#include <QStandardItem>
 
#include <memory>
 
class BrainSurface;
class DipoleObject;
 
//=============================================================================================================
struct PickResult
{
    bool    hit             = false;     
    float   distance        = 0.0f;     
    QVector3D hitPoint;                 
 
    QStandardItem *item     = nullptr;  
    QString surfaceKey;                 
    int     vertexIndex     = -1;       
 
    bool    isDipole        = false;    
    int     dipoleIndex     = -1;       
 
    // Annotation info (brain surfaces only)
    QString regionName;                 
    int     regionId        = -1;       
 
    //=========================================================================================================
    QString displayLabel() const;
};
 
//=============================================================================================================
class DISP3DRHISHARED_EXPORT RayPicker
{
public:
    //=========================================================================================================
    static bool unproject(const QPoint &screenPos,
                          const QRect &paneRect,
                          const QMatrix4x4 &pvm,
                          QVector3D &rayOrigin,
                          QVector3D &rayDir);
 
    //=========================================================================================================
    static PickResult 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 PickResult &result,
                              const QMap<const QStandardItem*, std::shared_ptr<BrainSurface>> &itemSurfaceMap,
                              const QMap<QString, std::shared_ptr<BrainSurface>> &surfaces);
};
 
#endif // RAYPICKER_H