Author: [log in to unmask]
Date: Mon Nov 21 10:33:54 2016
New Revision: 4573
Log:
Code to convert TOSCA magnetic field map calculations into format usable by slic and hps-java
Added:
java/trunk/util/src/main/java/org/hps/util/UnfoldFieldmap.java
Added: java/trunk/util/src/main/java/org/hps/util/UnfoldFieldmap.java
=============================================================================
--- java/trunk/util/src/main/java/org/hps/util/UnfoldFieldmap.java (added)
+++ java/trunk/util/src/main/java/org/hps/util/UnfoldFieldmap.java Mon Nov 21 10:33:54 2016
@@ -0,0 +1,295 @@
+package org.hps.util;
+
+
+import java.io.BufferedInputStream;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+import static java.lang.Math.sqrt;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.StringTokenizer;
+import static java.lang.Math.abs;
+
+/**
+ *
+ * @author Norman A Graf
+ *
+ */
+public class UnfoldFieldmap
+{
+
+// Storage space for the table
+ private double[][][] _xField;
+ private double[][][] _yField;
+ private double[][][] _zField;
+ // The dimensions of the table
+ private int _nx, _ny, _nz;
+ // The physical limits of the defined region
+ private double _minx, _maxx, _miny, _maxy, _minz, _maxz;
+ // The physical extent of the defined region
+ private double _dx, _dy, _dz;
+ // Offsets if field map is not in global coordinates
+ private double _xOffset;
+ private double _yOffset;
+ private double _zOffset;
+ // normalizations for the GUI
+// double[] _maxDim = new double[3];
+// double[] _offSet = new double[3];
+// double _maxScale = 0.;
+ // maximum field strength
+ private double _bMax;
+ List<double[]> lines = new ArrayList<double[]>();
+ double[][] Bx;
+ double[][] By;
+ double[][] Bz;
+ double[] xVals;
+ double[] zVals;
+ double[] yVals;
+
+ private double _scaleFactor;
+ private String _map2read;
+
+ public UnfoldFieldmap()
+ {
+ _scaleFactor = 1.;
+ }
+ public UnfoldFieldmap(String map2read,double scaleFactor)
+ {
+ _map2read = map2read;
+ _scaleFactor = scaleFactor;
+ }
+ void setup()
+ {
+// System.out.println(this.getClass().getClassLoader().getResource(map2read));
+// InputStream is = this.getClass().getClassLoader().getResourceAsStream(map2read);
+
+ System.out.println("\n-----------------------------------------------------------"
+ + "\n Reading Magnetic Field map "+_map2read
+ + "\n Scaling values by "+_scaleFactor
+ + "\n-----------------------------------------------------------");
+
+ try {
+ FileInputStream fin = new FileInputStream(_map2read);
+ BufferedReader myInput = new BufferedReader(new InputStreamReader(new BufferedInputStream(fin)));
+
+ String thisLine;
+ // ignore the first blank line
+ //thisLine = myInput.readLine();
+ // next line has table dimensions
+ thisLine = myInput.readLine();
+ System.out.println(thisLine);
+ // read in the table dimensions of the file
+ StringTokenizer st = new StringTokenizer(thisLine, " ");
+ _nx = Integer.parseInt(st.nextToken());
+ _ny = Integer.parseInt(st.nextToken());
+ _nz = Integer.parseInt(st.nextToken());
+
+ Bx = new double[_nx][_nz];
+ By = new double[_nx][_nz];
+ Bz = new double[_nx][_nz];
+ xVals = new double[_nx];
+ yVals = new double[_ny];
+ zVals = new double[_nz];
+ // Set up storage space for table
+ _xField = new double[_nx + 1][_ny + 1][_nz + 1];
+ _yField = new double[_nx + 1][_ny + 1][_nz + 1];
+ _zField = new double[_nx + 1][_ny + 1][_nz + 1];
+
+ // Ignore other header information
+ // The first line whose second character is '0' is considered to
+ // be the last line of the header.
+ do {
+ thisLine = myInput.readLine();
+ st = new StringTokenizer(thisLine, " ");
+ } while (!st.nextToken().trim().equals("0"));
+
+ // now ready to read in the values in the table
+ // format is:
+ // x y z Bx By Bz
+ //
+ // TOSCA files have distance measured in cm
+ // TOSCA files have field in OERSTED
+ // Geant4 requires mm and .0001T, so need to convert
+ // OERSTED to Tesla = 10000
+ // Tesla to Geant4 internal units where 1 Tesla is equal to 0.001
+ // field conversion factor is 10000000
+ //
+ double fieldConversionFactor = 10000000.;
+ double lengthConversionFactor = 10.;
+ int ix, iy, iz;
+ double xval = 0.;
+ double yval = 0.;
+ double zval = 0.;
+ double bx, by, bz;
+ for (ix = 0; ix < _nx; ix++) {
+ for (iy = 0; iy < _ny; iy++) {
+ for (iz = 0; iz < _nz; iz++) {
+ thisLine = myInput.readLine();
+ st = new StringTokenizer(thisLine, " ");
+ xval = Double.parseDouble(st.nextToken());
+ yval = Double.parseDouble(st.nextToken());
+ zval = Double.parseDouble(st.nextToken());
+ bx = Double.parseDouble(st.nextToken());
+ by = Double.parseDouble(st.nextToken());
+ bz = Double.parseDouble(st.nextToken());
+ double[] line = {xval, yval, zval, bx, by, bz};
+ lines.add(line);
+ Bx[ix][iz] = _scaleFactor*bx/fieldConversionFactor; // convert to magnetic field units used by Geant4
+ By[ix][iz] = _scaleFactor*by/fieldConversionFactor; //
+ Bz[ix][iz] = _scaleFactor*bz/fieldConversionFactor; //
+ xVals[ix] = xval*lengthConversionFactor;
+ yVals[iy] = yval*lengthConversionFactor;
+ zVals[iz] = zval*lengthConversionFactor;
+ if (ix == 0 && iy == 0 && iz == 0) {
+ _minx = xval;
+ _miny = yval;
+ _minz = zval;
+ }
+ _xField[ix][iy][iz] = bx;
+ _yField[ix][iy][iz] = by;
+ _zField[ix][iy][iz] = bz;
+ double b = bx * bx + by * by + bz * bz;
+ if (b > _bMax) {
+ _bMax = b;
+ }
+ }
+ }
+ }
+ _bMax = sqrt(_bMax);
+
+ _maxx = xval;
+ _maxy = yval;
+ _maxz = zval;
+
+ System.out.println("\n ---> ... done reading ");
+ System.out.println(" ---> assumed the order: x, y, z, Bx, By, Bz "
+ + "\n ---> Min values x,y,z: "
+ + _minx + " " + _miny + " " + _minz + " cm "
+ + "\n ---> Max values x,y,z: "
+ + _maxx + " " + _maxy + " " + _maxz + " cm "
+ + "\n Maximum Field strength: " + _bMax + " "
+ + "\n ---> The field will be offset by " + _xOffset + " " + _yOffset + " " + _zOffset + " cm ");
+
+ _dx = _maxx - _minx;
+ _dy = _maxy - _miny;
+ _dz = _maxz - _minz;
+ System.out.println("\n ---> Range of values x,y,z: "
+ + _dx + " " + _dy + " " + _dz + " cm in z "
+ + "\n-----------------------------------------------------------");
+
+ System.out.println(lines.size());
+ myInput.close();
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ // want to normalize the dimensions to fit into the visible 1x1x1 cube of the applet
+// _maxDim[0] = (_maxx - _minx) / 2.;
+// _maxDim[1] = (_maxy - _miny) / 2.;
+// _maxDim[2] = (_maxz - _minz) / 2.;
+// for (int ii = 0; ii < 3; ++ii) {
+// if (_maxDim[ii] > _maxScale) {
+// _maxScale = _maxDim[ii];
+// }
+// }
+// _offSet[0] = (_maxx + _minx) / 2.;
+// _offSet[1] = (_maxy + _miny) / 2.;
+// _offSet[2] = (_maxz + _minz) / 2.;
+
+ }
+
+ public void writeout()
+ {
+ try {
+ // output : Unicode to Cp850 (MS-DOS Latin-1)
+ FileOutputStream fos = new FileOutputStream("out.dat");
+ Writer w =
+ new BufferedWriter(new OutputStreamWriter(fos, "Cp850"));
+ w.write("\n");
+ w.write((2 * _nx - 1) + " " + (2 * _ny - 1) + " " + (2 * _nz - 1)+"\n");
+ w.write(" 1 X(mm) \n");
+ w.write(" 2 Y(mm) \n");
+ w.write(" 3 Z(mm) \n");
+ w.write(" 4 BX(1000T) \n");
+ w.write(" 5 BY(1000T) \n");
+ w.write(" 6 BZ(1000T) \n");
+ w.write(" 0 End of Header. Data follows in above format \n");
+
+ // want to reflect the field in x and z
+ // for now, assume (0,0) is minimum for (x,z)
+
+ for (int i = -(_nx - 1); i < _nx; ++i) {
+ for (int j = -(_ny - 1); j < _ny; ++j) {
+ for (int k = -(_nz - 1); k < _nz; ++k) {
+ double xSign = (i < 0) ? -1. : 1.;
+ double ySign = (j < 0) ? -1. : 1.;
+ double zSign = (k < 0) ? -1. : 1.;
+// double x = (i < 0) ? -xVals[abs(i)] : xVals[abs(i)];
+// double y = (j < 0) ? -yVals[abs(j)] : yVals[abs(j)];
+// double z = (k < 0) ? -zVals[abs(k)] : zVals[abs(k)];
+ w.write(xSign*xVals[abs(i)] + " " + ySign*yVals[abs(j)] + " " + zSign*zVals[abs(k)] +" "+ xSign*Bx[abs(i)][abs(k)]+" " + By[abs(i)][abs(k)] + " "+zSign*Bz[abs(i)][abs(k)] + " \n");
+ }
+ }
+ }
+
+ w.flush();
+ w.close();
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+
+
+ }
+
+// public void writeoutGnuplot()
+// {
+// try {
+// // output : Unicode to Cp850 (MS-DOS Latin-1)
+// FileOutputStream fos = new FileOutputStream("gnuplot.dat");
+// Writer w =
+// new BufferedWriter(new OutputStreamWriter(fos, "Cp850"));
+// // want to reflect the field in x and z
+// // for now, assume (0,0) is minimum for (x,z)
+// for (int i = -(_nx - 1); i < _nx; ++i) {
+// //for (int j = 0; j < _ny; ++j) {
+// for (int k = -(_nz - 1); k < _nz; ++k) {
+// double x = (i < 0) ? -xVals[abs(i)] : xVals[abs(i)];
+// double z = (k < 0) ? -zVals[abs(k)] : zVals[abs(k)];
+// w.write(x + " " + z + " " + By[abs(i)][abs(k)] + "\n");
+// }
+// w.write("\n");
+// //}
+// }
+//
+// w.flush();
+// w.close();
+// } catch (Exception e) {
+// e.printStackTrace();
+// }
+// }
+
+ public static void main(String[] args)
+ {
+ String map2read = "209acm2_5kg.table";
+ double scaleFactor = 1.0;
+ if(args.length>0)
+ {
+ map2read = args[0];
+ }
+ if(args.length>1)
+ {
+ scaleFactor = Double.parseDouble(args[1]);
+ }
+ System.out.println("Reading in field map "+map2read);
+ System.out.println("Scaling field map by "+scaleFactor);
+ UnfoldFieldmap doit = new UnfoldFieldmap(map2read,scaleFactor);
+ doit.setup();
+ doit.writeout();
+// doit.writeoutGnuplot();
+ }
+}
+
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