252 lines
9.9 KiB
C++
252 lines
9.9 KiB
C++
#include "sr1TabulatedField3D.hh"
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sr1TabulatedField3D* sr1TabulatedField3D::pointerToTabulatedField3D=NULL;
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sr1TabulatedField3D* sr1TabulatedField3D::GetInstance() {
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return pointerToTabulatedField3D;
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}
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sr1TabulatedField3D::sr1TabulatedField3D( const char* filename, double fieldValue )
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:ffieldValue(fieldValue),invertX(false),invertY(false),invertZ(false)
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{
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pointerToTabulatedField3D=this;
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double lenUnit= meter;
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// double fieldUnit= tesla;
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G4cout << "\n-----------------------------------------------------------"
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<< "\n Magnetic field"
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<< "\n-----------------------------------------------------------"
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<< endl;
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G4cout << " tesla="<<tesla<<G4endl;
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G4cout << " Field set to "<< fieldValue/tesla << " T"<< G4endl;
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G4cout << "\n ---> " "Reading the field grid from " << filename << " ... " << G4endl;
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ifstream file( filename ); // Open the file for reading.
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// Ignore first blank line
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char buffer[256];
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file.getline(buffer,256);
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// Read table dimensions
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file >> nx >> ny >> nz; // Note dodgy order
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G4cout << " [ Number of values x,y,z: "
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<< nx << " " << ny << " " << nz << " ] "
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<< endl;
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// Set up storage space for table
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xField.resize( nx );
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yField.resize( nx );
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zField.resize( nx );
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int ix, iy, iz;
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for (ix=0; ix<nx; ix++) {
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xField[ix].resize(ny);
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yField[ix].resize(ny);
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zField[ix].resize(ny);
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for (iy=0; iy<ny; iy++) {
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xField[ix][iy].resize(nz);
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yField[ix][iy].resize(nz);
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zField[ix][iy].resize(nz);
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}
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}
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// Ignore other header information
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// The first line whose second character is '0' is considered to
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// be the last line of the header.
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do {
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file.getline(buffer,256);
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} while ( buffer[1]!='0');
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// Read in the data
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double xval,yval,zval,bx,by,bz;
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double permeability; // Not used in this example.
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for (ix=0; ix<nx; ix++) {
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for (iy=0; iy<ny; iy++) {
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for (iz=0; iz<nz; iz++) {
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file >> xval >> yval >> zval >> bx >> by >> bz >> permeability;
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if ( ix==0 && iy==0 && iz==0 ) {
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minx = xval * lenUnit;
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miny = yval * lenUnit;
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minz = zval * lenUnit;
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}
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//xField[ix][iy][iz] = bx * fieldUnit * fieldValue;
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//yField[ix][iy][iz] = by * fieldUnit * fieldValue;
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//zField[ix][iy][iz] = bz * fieldUnit * fieldValue;
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// xField[ix][iy][iz] = bx * fieldValue;
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// yField[ix][iy][iz] = by * fieldValue;
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// zField[ix][iy][iz] = bz * fieldValue;
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xField[ix][iy][iz] = bx;
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yField[ix][iy][iz] = by;
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zField[ix][iy][iz] = bz;
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}
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}
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}
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file.close();
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maxx = xval * lenUnit;
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maxy = yval * lenUnit;
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maxz = zval * lenUnit;
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G4cout << "\n ---> ... done reading " << endl;
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// G4cout << " Read values of field from file " << filename << endl;
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G4cout << " ---> assumed the order: x, y, z, Bx, By, Bz "
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<< "\n ---> Min values x,y,z: "
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<< minx/cm << " " << miny/cm << " " << minz/cm << " cm "
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<< "\n ---> Max values x,y,z: "
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<< maxx/cm << " " << maxy/cm << " " << maxz/cm << " cm " << endl;
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// Should really check that the limits are not the wrong way around.
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if (maxx < minx) {swap(maxx,minx); invertX = true;}
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if (maxy < miny) {swap(maxy,miny); invertY = true;}
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if (maxz < minz) {swap(maxz,minz); invertZ = true;}
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G4cout << "\nAfter reordering if neccesary"
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<< "\n ---> Min values x,y,z: "
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<< minx/cm << " " << miny/cm << " " << minz/cm << " cm "
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<< " \n ---> Max values x,y,z: "
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<< maxx/cm << " " << maxy/cm << " " << maxz/cm << " cm ";
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dx = maxx - minx;
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dy = maxy - miny;
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dz = maxz - minz;
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G4cout << "\n ---> Dif values x,y,z (range): "
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<< dx/cm << " " << dy/cm << " " << dz/cm << " cm in z "
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<< "\n-----------------------------------------------------------" << endl;
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}
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void sr1TabulatedField3D::GetFieldValue(const double point[4],
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double *Bfield ) const
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{
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Bfield[0]=0.; Bfield[1]=0.; Bfield[2]=0.;
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double x = point[0]+positionOffset[0];
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double y = point[1]+positionOffset[1];
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double z = point[2]+positionOffset[2];
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// Check that the point is within the defined region
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if ( x>minx && x<maxx &&
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y>miny && y<maxy &&
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z>minz && z<maxz ) {
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// Position of given point within region, normalized to the range
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// [0,1]
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double xfraction = (x - minx) / dx;
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double yfraction = (y - miny) / dy;
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double zfraction = (z - minz) / dz;
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if (invertX) { xfraction = 1 - xfraction;}
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if (invertY) { yfraction = 1 - yfraction;}
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if (invertZ) { zfraction = 1 - zfraction;}
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// Need addresses of these to pass to modf below.
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// modf uses its second argument as an OUTPUT argument.
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double xdindex, ydindex, zdindex;
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// Position of the point within the cuboid defined by the
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// nearest surrounding tabulated points
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double xlocal = ( modf(xfraction*(nx-1), &xdindex));
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double ylocal = ( modf(yfraction*(ny-1), &ydindex));
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double zlocal = ( modf(zfraction*(nz-1), &zdindex));
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// The indices of the nearest tabulated point whose coordinates
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// are all less than those of the given point
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int xindex = static_cast<int>(xdindex);
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int yindex = static_cast<int>(ydindex);
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int zindex = static_cast<int>(zdindex);
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//cks The following check is necessary - even though xindex and zindex should never be out of range,
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// it may happen (due to some rounding error ?). It is better to leave the check here.
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if ((xindex<0)||(xindex>(nx-2))) {
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std::cout<<"SERIOUS PROBLEM: xindex out of range! xindex="<<xindex<<" x="<<x<<" xfraction="<<xfraction<<std::endl;
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if (xindex<0) xindex=0;
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else xindex=nx-2;
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}
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if ((yindex<0)||(yindex>(ny-2))) {
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std::cout<<"SERIOUS PROBLEM: yindex out of range! yindex="<<yindex<<" y="<<y<<" yfraction="<<yfraction<<std::endl;
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if (yindex<0) yindex=0;
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else yindex=ny-2;
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}
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if ((zindex<0)||(zindex>(nz-2))) {
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std::cout<<"SERIOUS PROBLEM: zindex out of range! zindex="<<zindex<<" z="<<z<<" zfraction="<<zfraction<<std::endl;
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if (zindex<0) zindex=0;
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else zindex=nz-2;
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}
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#ifdef DEBUG_INTERPOLATING_FIELD
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G4cout << "Local x,y,z: " << xlocal << " " << ylocal << " " << zlocal << endl;
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G4cout << "Index x,y,z: " << xindex << " " << yindex << " " << zindex << endl;
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double valx0z0, mulx0z0, valx1z0, mulx1z0;
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double valx0z1, mulx0z1, valx1z1, mulx1z1;
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valx0z0= table[xindex ][0][zindex]; mulx0z0= (1-xlocal) * (1-zlocal);
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valx1z0= table[xindex+1][0][zindex]; mulx1z0= xlocal * (1-zlocal);
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valx0z1= table[xindex ][0][zindex+1]; mulx0z1= (1-xlocal) * zlocal;
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valx1z1= table[xindex+1][0][zindex+1]; mulx1z1= xlocal * zlocal;
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#endif
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// Full 3-dimensional version
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Bfield[0] =
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xField[xindex ][yindex ][zindex ] * (1-xlocal) * (1-ylocal) * (1-zlocal) +
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xField[xindex ][yindex ][zindex+1] * (1-xlocal) * (1-ylocal) * zlocal +
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xField[xindex ][yindex+1][zindex ] * (1-xlocal) * ylocal * (1-zlocal) +
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xField[xindex ][yindex+1][zindex+1] * (1-xlocal) * ylocal * zlocal +
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xField[xindex+1][yindex ][zindex ] * xlocal * (1-ylocal) * (1-zlocal) +
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xField[xindex+1][yindex ][zindex+1] * xlocal * (1-ylocal) * zlocal +
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xField[xindex+1][yindex+1][zindex ] * xlocal * ylocal * (1-zlocal) +
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xField[xindex+1][yindex+1][zindex+1] * xlocal * ylocal * zlocal ;
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Bfield[1] =
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yField[xindex ][yindex ][zindex ] * (1-xlocal) * (1-ylocal) * (1-zlocal) +
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yField[xindex ][yindex ][zindex+1] * (1-xlocal) * (1-ylocal) * zlocal +
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yField[xindex ][yindex+1][zindex ] * (1-xlocal) * ylocal * (1-zlocal) +
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yField[xindex ][yindex+1][zindex+1] * (1-xlocal) * ylocal * zlocal +
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yField[xindex+1][yindex ][zindex ] * xlocal * (1-ylocal) * (1-zlocal) +
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yField[xindex+1][yindex ][zindex+1] * xlocal * (1-ylocal) * zlocal +
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yField[xindex+1][yindex+1][zindex ] * xlocal * ylocal * (1-zlocal) +
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yField[xindex+1][yindex+1][zindex+1] * xlocal * ylocal * zlocal ;
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Bfield[2] =
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zField[xindex ][yindex ][zindex ] * (1-xlocal) * (1-ylocal) * (1-zlocal) +
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zField[xindex ][yindex ][zindex+1] * (1-xlocal) * (1-ylocal) * zlocal +
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zField[xindex ][yindex+1][zindex ] * (1-xlocal) * ylocal * (1-zlocal) +
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zField[xindex ][yindex+1][zindex+1] * (1-xlocal) * ylocal * zlocal +
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zField[xindex+1][yindex ][zindex ] * xlocal * (1-ylocal) * (1-zlocal) +
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zField[xindex+1][yindex ][zindex+1] * xlocal * (1-ylocal) * zlocal +
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zField[xindex+1][yindex+1][zindex ] * xlocal * ylocal * (1-zlocal) +
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zField[xindex+1][yindex+1][zindex+1] * xlocal * ylocal * zlocal ;
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Bfield[0] = Bfield[0] * ffieldValue;
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Bfield[1] = Bfield[1] * ffieldValue;
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Bfield[2] = Bfield[2] * ffieldValue;
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}
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if (sqrt(Bfield[0]*Bfield[0]+Bfield[1]*Bfield[1]+Bfield[2]*Bfield[2])<0.00001*tesla) {
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// Bfield[0] = 0.0;
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// Bfield[1] = 0.0;
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Bfield[2] = 0.00001*tesla;
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}
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// if ((point[2]>-1*cm)&&(point[2]<1*cm)) {
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// G4cout<<"Field at point ("<<point[0]<<","<<point[1]<<","<<point[2]<<","<<point[3]<<" = "
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// << Bfield[0]/tesla<<", "<<Bfield[1]/tesla<<", "<<Bfield[2]/tesla<<G4endl;
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// }
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}
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G4double sr1TabulatedField3D::GetFieldSetValue() {
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return ffieldValue;
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}
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void sr1TabulatedField3D::SetFieldValue(double newFieldValue) {
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// // Rescale the magnetic field for a new value of the magnetic field
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// G4double factor = newFieldValue/ffieldValue;
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// for (G4int ix=0; ix<nx; ix++) {
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// for (G4int iy=0; iy<ny; iy++) {
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// for (G4int iz=0; iz<nz; iz++) {
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// xField[ix][iy][iz] = xField[ix][iy][iz] * factor;
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// yField[ix][iy][iz] = yField[ix][iy][iz] * factor;
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// zField[ix][iy][iz] = zField[ix][iy][iz] * factor;
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// }
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// }
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// }
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ffieldValue=newFieldValue;
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G4cout<<"sr1TabulatedField3D.cc: ffieldValue changed to="<< ffieldValue/tesla<<"T "<<G4endl;
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}
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