OpenPaperOpt/Halftone.h

Go to the documentation of this file.

// Halftone.h: interface for the Halftone class.
//
#if !defined(AFX_HALFTONE_H__10167E05_8439_4637_9A44_6AB9D1959D6E__INCLUDED_)
#define AFX_HALFTONE_H__10167E05_8439_4637_9A44_6AB9D1959D6E__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include <fstream>
#include <complex>
#include <valarray>
#include <vector>
#include "WavePacket.h"
#include "ScatteringParameters.h"
#include "HomogeneousScatteringMaterial.h"


class Halftone {

        friend class SurfaceTNInk;

public:
        Halftone() {};
        //Halftone(SurfaceTNInk* _surf, ifstream& inht, float _zoffset, std::vector<float> lambdasim);


        Halftone(ScatteringParameters* pScatteringParameters, float zOffset, std::vector<float>& rLambdas,
                          float xmin, float xmax, float ymin, float ymax, float screenAngle, float dropletHeight, float dropletWidth,
                                float dropletSpacing);

        virtual ~Halftone();

        void setSurface(SurfaceTNInk* pSurface);
        int drop_process(WavePacket& wp, int updown) const;
        
        double GetZmax() const { return offset+radius; }

private:
/*******************************************************************************
 * DropScatter
 *
 * Returns the result of a scattering of an ink drop. The drop normal at the
 * intersection point must be stored in wp.Snormal, and wp.mPos must refer to
 * the boundary of the drop. scatter_case indicates the
 * situation:
  *******************************************************************************/
        int DropScatter(WavePacket& wp, int scatter_case) const;

/*******************************************************************************
 * DropIntercept
 *
 * A function that returns the distance from a wp to a drop boundary. The wp must
 * be placed within the drop, where xp and yp refer to the x- and y-coordinates
 * of the centre of the drop. hull_ind should have any of the following values:
 *   -1: The wp is placed on the drop-surface contact area.
 *    0: The wp is within the drop.
 *    1: The wp is placed on the drop hull.
 *******************************************************************************/
        double DropIntercept(WavePacket& wp, double xp, double yp, int& hull_ind) const;

        SurfaceTNInk* surf;

        float xmin, xmax;               // Min and max of the area covered with droplets
        float ymin, ymax;

        double spacing;                                 // Droplet spacing
        double screen_angle;            // Screen angle in radians
        double transfx[2];                      // Precalc values to transform coordinates
        double transfy[2];                      //   to and from the screen coordinate system

        double width;                                           // Droplet width
        double height;                                  // Droplet height
        double radius;                                  // Droplet radius
        double radius2;                                 //   ...squared
        double offset;                                  // The z-value of the sphere centre corresponding to the droplets
        double offset2;                                 //    ...squared
        double surface_radius2; // Half the width squared


        HomogeneousScatteringMaterial* mHomogeneousScatteringMaterial;

        vector<double> mSca;
        vector<double> mAbs;
        vector<complex_LC> mpRefrIndex;


protected:

        void WriteInfo(int nbr);

};

const double MAX_DropScatter_LOOPS = 1000; // Max no of allowed scattering
                                                                                                                                                                                // events within a droplet.

#endif // !defined(AFX_HALFTONE_H__10167E05_8439_4637_9A44_6AB9D1959D6E__INCLUDED_)