cxSliceAutoViewportCalculator.h

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#ifndef CXSLICEAUTOVIEWPORTCALCULATOR_H
#define CXSLICEAUTOVIEWPORTCALCULATOR_H

#include "cxResourceVisualizationExport.h"
#include "cxVector3D.h"
#include "cxBoundingBox3D.h"
#include "cxTransform3D.h"
#include "cxDefinitions.h"

namespace cx
{

class cxResourceVisualization_EXPORT SliceAutoViewportCalculator
{
public:

        struct ReturnType
        {
                ReturnType(Vector3D center_shift_s_=Vector3D::Zero(), double zoom_=1) :
                        center_shift_s(center_shift_s_),
                        zoom(zoom_)
                {
                }

                double zoom;
                Vector3D center_shift_s;
        };
        // find a (center,zoom) change according the the input config.
        SliceAutoViewportCalculator::ReturnType calculate();

        // MUST set all these parameters before call to calculate() is valid.
        FOLLOW_TYPE mFollowType;
        Vector3D mTooltip_s;
        double mFollowTooltipBoundary;
        bool mFollowTooltip;
        DoubleBoundingBox3D mBB_s;
        DoubleBoundingBox3D mROI_s;

private:
        Vector3D findCenterShift_s();
        ReturnType autoZoom();
        Vector3D findVirtualTooltip_s();
        DoubleBoundingBox3D findStaticBox();
        Vector3D findShiftFromBoxToTool_s(DoubleBoundingBox3D BB_s, Vector3D pt_s);
        Vector3D findShiftFromBoxToROI(DoubleBoundingBox3D bb, DoubleBoundingBox3D roi);
        double findZoomRequiredToIncludeRoi(DoubleBoundingBox3D base, DoubleBoundingBox3D roi);
        bool isAutoZoom() const;
        ReturnType calculateZoomCenter_SmallestFitROI();
        ReturnType calculateCenter_FitToolIntoViewport();
        ReturnType calculateZoom_FitROIKeepCenter();
};

} // namespace cx

#endif // CXSLICEAUTOVIEWPORTCALCULATOR_H