Volume.h

#pragma once

#include <stdlib.h>
#include <windows.h>
#include <commdlg.h>
#include <iostream>
#include <sstream>
#include <string>
#include <io.h>
#include <vector>
#include <algorithm>
#include <functional>
#include <math.h>


using std::min;
using std::cout;
using std::endl;

// Simple linear volume class which supports loading from DAT files
class Volume
{
public:

        class Voxel
        {
        public:

                Voxel()
                {
                        SetValue(0.0f);
                };

                Voxel(const Voxel & datOther)
                {
                        m_fValue = datOther.m_fValue;
                };

                Voxel(const float fValue)
                {
                        SetValue(fValue);
                };


                ~Voxel()
                {
                };

                void SetValue(const float fValue)
                {
                        m_fValue = fValue;
                };

                const float GetValue() const
                {
                        return m_fValue;
                };

                const bool operator==(const Voxel &datOther) const
                {
                        return (GetValue() == datOther.GetValue());
                };

                const bool operator!=(const Voxel &datOther) const
                {
                        return !(*this == datOther);
                };

                const bool operator>(const Voxel &datOther) const
                {
                        return GetValue() > datOther.GetValue();
                };

                const bool operator>=(const Voxel &datOther) const
                {
                        return GetValue() >= datOther.GetValue();
                };

                const bool operator<(const Voxel &datOther) const
                {
                        return GetValue() < datOther.GetValue();
                };

                const bool operator<=(const Voxel &datOther) const
                {
                        return GetValue() <= datOther.GetValue();
                };

                const Voxel & operator+=(const Voxel & datOther)
                {
                        m_fValue += datOther.m_fValue;
                        return *this;
                };

                const Voxel & operator-=(const Voxel & datOther)
                {
                        m_fValue -= datOther.m_fValue;
                        return *this;
                };

                const Voxel & operator*=(const float & fOther)
                {
                        m_fValue *= fOther;
                        return *this;
                };

                const Voxel & operator/=(const float & fOther)
                {
                        m_fValue /= fOther;
                        return *this;
                };

                const Voxel operator+(const Voxel & datOther) const
                {
                        Voxel voxNew = *this;
                        voxNew += datOther;
                        return voxNew;
                };

                const Voxel operator-(const Voxel & datOther) const
                {
                        Voxel voxNew = *this;
                        voxNew -= datOther;
                        return voxNew;
                };

                const Voxel operator*(const float & fOther) const
                {
                        Voxel voxNew = *this;
                        voxNew *= fOther;
                        return voxNew;
                };

                const Voxel operator/(const float & fOther) const
                {
                        Voxel voxNew = *this;
                        voxNew /= fOther;
                        return voxNew;
                };

        private:
                float m_fValue;
        };

public:

        Volume() : m_iWidth(1), m_iHeight(1), m_iDepth(1), m_vecVoxels(1), hist(0)
        {
        };

        Volume(const std::string &strFilename) : m_iWidth(1), m_iHeight(1), m_iDepth(1), m_vecVoxels(1), hist(0)
        {
                load(strFilename);
        };

        ~Volume(void)
        {
                if (hist != 0) {
                        delete[] hist;
                }
        };

        const Voxel & Get(const int iX, const int iY, const int iZ) const
        {
                return m_vecVoxels[iX + iY*m_iWidth + iZ*m_iWidth*m_iHeight];
        };

        const Voxel & Get(const int iIndex) const
        {
                return m_vecVoxels[iIndex];
        };

        const Voxel * Get() const
        {
                return &(m_vecVoxels.front());
        };

        const int GetWidth() const
        {
                return m_iWidth;
        };

        const int GetHeight() const
        {
                return m_iHeight;
        };

        const int GetDepth() const
        {
                return m_iDepth;
        };

        const int GetSize() const
        {
                return int(m_vecVoxels.size());
        };

        //für scale = 8 ergeben sich z.B: 512 werte
        double* getHistogram(int scale) {

                if (hist != 0) {
                        delete[] hist;
                }

                int index;
                hist = new double[4096/scale]();
                for (int i = 0; i < GetSize(); i++) {
                        //intensität auf int aufrunden für index
                        index = (int)floorf(m_vecVoxels[i].GetValue()*4095.0f)/scale;
                        hist[index]++;
                }
                //logarithmieren
                for (int i = 0; i < (4096/scale); i++) {
                        hist[i] = log(hist[i]);
                }
                return hist;
        };
        
        void load(const std::string & strFilename)
        {
                cout << "- Loading file '" << strFilename << "' ... " << endl;
                FILE *fp = NULL;
                
                fopen_s(&fp,strFilename.c_str(),"rb");

                if (!fp)
                {
                        std::cerr << "+ Error loading file." << std::endl << endl;
                }
                else
                {
                        char vcPath[1024];
                        char *pFileName = NULL;
                        GetFullPathName(strFilename.c_str(),1024,vcPath,&pFileName);
                        char vcDrive[1024], vcDirectory[1024], vcFilename[1024], vcExtension[1024];
                        _splitpath_s(vcPath,vcDrive,vcDirectory,vcFilename,vcExtension);
                        const std::string strAdditionalFilename =  std::string(vcDrive)+std::string(vcDirectory)+std::string(vcFilename)+std::string(".ini");

                        char vpSpacingX[1024],vpSpacingY[1024],vpSpacingZ[1024];
                        GetPrivateProfileString("DatFile","oldDat Spacing X","1.0",vpSpacingX,256,strAdditionalFilename.c_str());
                        GetPrivateProfileString("DatFile","oldDat Spacing Y","1.0",vpSpacingY,256,strAdditionalFilename.c_str());
                        GetPrivateProfileString("DatFile","oldDat Spacing Z","1.0",vpSpacingZ,256,strAdditionalFilename.c_str());

                        unsigned short uWidth, uHeight, uDepth;
                        fread(&uWidth,sizeof(unsigned short),1,fp);
                        fread(&uHeight,sizeof(unsigned short),1,fp);
                        fread(&uDepth,sizeof(unsigned short),1,fp);

                        m_iWidth = int(uWidth);
                        m_iHeight = int(uHeight);
                        m_iDepth = int(uDepth);

                        const int iSlice = m_iWidth * m_iHeight;
                        const int iSize = iSlice * m_iDepth;
                        m_vecVoxels.resize(iSize);

                        std::vector<unsigned short> vecData;
                        vecData.resize(iSize);

                        fread((void*)&(vecData.front()),sizeof(unsigned short),iSize,fp);
                        fclose(fp);

                        cout << "- File loaded." << endl;

                        for (int k=0;k<m_iDepth;k++)
                        {
                                for (int j=0;j<m_iHeight;j++)
                                {
                                        for (int i=0;i<m_iWidth;i++)
                                        {
                                                //we convert the data to float values in an interval of [0..1]
                                                const float fValue = min(1.0f, float(vecData[i + j*m_iWidth + k*iSlice]*16) / 65535.0f);
                                                //const float fValue = min(1.0f, float(vecData[i + j*m_iWidth + k*iSlice]) / 4095.0f);
                                                m_vecVoxels[i+j*m_iWidth+k*iSlice] = Voxel(fValue);
                                        }
                                }
                                cout << "\r- Preparing data (" << (k*100) / (m_iDepth-1) << "%) ...";
                                
                        }
                        cout << std::endl << "- Data prepared." << endl;
                }

                cout << "Volume dimensions: " << m_iWidth << " x " << m_iHeight << " x " << m_iDepth << endl;
        };

        std::vector<Voxel> m_vecVoxels;
protected:

private:
        
        int m_iWidth,m_iHeight,m_iDepth;
        double* hist;
};