319 lines
8.5 KiB
C++
319 lines
8.5 KiB
C++
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Module: FGTable.cpp
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Author: Jon S. Berndt
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Date started: 1/9/2001
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Purpose: Models a lookup table
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------------- Copyright (C) 2001 Jon S. Berndt (jsb@hal-pc.org) -------------
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA.
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Further information about the GNU General Public License can also be found on
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the world wide web at http://www.gnu.org.
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FUNCTIONAL DESCRIPTION
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--------------------------------------------------------------------------------
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Models a lookup table
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HISTORY
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--------------------------------------------------------------------------------
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JSB 1/9/00 Created
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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INCLUDES
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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#include "FGTable.h"
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#if defined ( sgi ) && !defined( __GNUC__ )
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#include <iomanip.h>
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#else
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#include <iomanip>
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#endif
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using namespace std;
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namespace JSBSim {
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static const char *IdSrc = "$Id$";
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static const char *IdHdr = ID_TABLE;
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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CLASS IMPLEMENTATION
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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FGTable::FGTable(int NRows, int NCols) : nRows(NRows), nCols(NCols)
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{
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if (NCols > 1) {
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Type = tt2D;
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colCounter = 1;
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rowCounter = 0;
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} else if (NCols == 1) {
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Type = tt1D;
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colCounter = 0;
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rowCounter = 1;
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} else {
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cerr << "FGTable cannot accept 'Rows=0'" << endl;
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}
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Data = Allocate();
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lastRowIndex=lastColumnIndex=2;
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Debug(0);
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FGTable::FGTable(int NRows) : nRows(NRows), nCols(1)
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{
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Type = tt1D;
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colCounter = 0;
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rowCounter = 1;
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Data = Allocate();
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Debug(0);
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lastRowIndex=lastColumnIndex=2;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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double** FGTable::Allocate(void)
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{
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Data = new double*[nRows+1];
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for (int r=0; r<=nRows; r++) {
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Data[r] = new double[nCols+1];
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for (int c=0; c<=nCols; c++) {
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Data[r][c] = 0.0;
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}
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}
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return Data;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FGTable::~FGTable()
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{
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for (int r=0; r<=nRows; r++) if (Data[r]) delete[] Data[r];
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if (Data) delete[] Data;
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Debug(1);
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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double FGTable::GetValue(double key)
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{
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double Factor, Value, Span;
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int r=lastRowIndex;
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//if the key is off the end of the table, just return the
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//end-of-table value, do not extrapolate
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if( key <= Data[1][0] ) {
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lastRowIndex=2;
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//cout << "Key underneath table: " << key << endl;
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return Data[1][1];
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} else if ( key >= Data[nRows][0] ) {
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lastRowIndex=nRows;
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//cout << "Key over table: " << key << endl;
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return Data[nRows][1];
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}
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// the key is somewhere in the middle, search for the right breakpoint
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// assume the correct breakpoint has not changed since last frame or
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// has only changed very little
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if ( r > 2 && Data[r-1][0] > key ) {
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while( Data[r-1][0] > key && r > 2) { r--; }
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} else if ( Data[r][0] < key ) {
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while( Data[r][0] <= key && r <= nRows) { r++; }
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}
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lastRowIndex=r;
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// make sure denominator below does not go to zero.
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Span = Data[r][0] - Data[r-1][0];
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if (Span != 0.0) {
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Factor = (key - Data[r-1][0]) / Span;
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if (Factor > 1.0) Factor = 1.0;
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} else {
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Factor = 1.0;
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}
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Value = Factor*(Data[r][1] - Data[r-1][1]) + Data[r-1][1];
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return Value;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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double FGTable::GetValue(double rowKey, double colKey)
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{
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double rFactor, cFactor, col1temp, col2temp, Value;
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int r=lastRowIndex;
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int c=lastColumnIndex;
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if ( r > 2 && Data[r-1][0] > rowKey ) {
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while ( Data[r-1][0] > rowKey && r > 2) { r--; }
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} else if ( Data[r][0] < rowKey ) {
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// cout << Data[r][0] << endl;
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while ( r <= nRows && Data[r][0] <= rowKey ) { r++; }
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if ( r > nRows ) r = nRows;
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}
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if ( c > 2 && Data[0][c-1] > colKey ) {
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while( Data[0][c-1] > colKey && c > 2) { c--; }
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} else if ( Data[0][c] < colKey ) {
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while( Data[0][c] <= colKey && c <= nCols) { c++; }
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if ( c > nCols ) c = nCols;
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}
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lastRowIndex=r;
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lastColumnIndex=c;
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rFactor = (rowKey - Data[r-1][0]) / (Data[r][0] - Data[r-1][0]);
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cFactor = (colKey - Data[0][c-1]) / (Data[0][c] - Data[0][c-1]);
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if (rFactor > 1.0) rFactor = 1.0;
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else if (rFactor < 0.0) rFactor = 0.0;
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if (cFactor > 1.0) cFactor = 1.0;
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else if (cFactor < 0.0) cFactor = 0.0;
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col1temp = rFactor*(Data[r][c-1] - Data[r-1][c-1]) + Data[r-1][c-1];
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col2temp = rFactor*(Data[r][c] - Data[r-1][c]) + Data[r-1][c];
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Value = col1temp + cFactor*(col2temp - col1temp);
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return Value;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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void FGTable::operator<<(FGConfigFile& infile)
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{
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int startRow;
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if (Type == tt1D) startRow = 1;
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else startRow = 0;
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for (int r=startRow; r<=nRows; r++) {
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for (int c=0; c<=nCols; c++) {
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if (r != 0 || c != 0) {
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infile >> Data[r][c];
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}
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}
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}
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FGTable& FGTable::operator<<(const double n)
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{
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Data[rowCounter][colCounter] = n;
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if (colCounter == nCols) {
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colCounter = 0;
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rowCounter++;
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} else {
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colCounter++;
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}
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return *this;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FGTable& FGTable::operator<<(const int n)
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{
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*this << (double)n;
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return *this;
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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void FGTable::Print(void)
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{
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int startRow;
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if (Type == tt1D) startRow = 1;
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else startRow = 0;
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#if defined (sgi) && !defined(__GNUC__)
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unsigned long flags = cout.setf(ios::fixed);
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#else
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ios::fmtflags flags = cout.setf(ios::fixed); // set up output stream
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#endif
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cout.precision(4);
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for (int r=startRow; r<=nRows; r++) {
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cout << " ";
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for (int c=0; c<=nCols; c++) {
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if (r == 0 && c == 0) {
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cout << " ";
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} else {
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cout << Data[r][c] << " ";
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}
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}
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cout << endl;
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}
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cout.setf(flags); // reset
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}
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//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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// The bitmasked value choices are as follows:
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// unset: In this case (the default) JSBSim would only print
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// out the normally expected messages, essentially echoing
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// the config files as they are read. If the environment
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// variable is not set, debug_lvl is set to 1 internally
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// 0: This requests JSBSim not to output any messages
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// whatsoever.
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// 1: This value explicity requests the normal JSBSim
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// startup messages
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// 2: This value asks for a message to be printed out when
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// a class is instantiated
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// 4: When this value is set, a message is displayed when a
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// FGModel object executes its Run() method
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// 8: When this value is set, various runtime state variables
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// are printed out periodically
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// 16: When set various parameters are sanity checked and
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// a message is printed out when they go out of bounds
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void FGTable::Debug(int from)
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{
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if (debug_lvl <= 0) return;
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if (debug_lvl & 1) { // Standard console startup message output
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if (from == 0) { // Constructor
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}
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}
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if (debug_lvl & 2 ) { // Instantiation/Destruction notification
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if (from == 0) cout << "Instantiated: FGTable" << endl;
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if (from == 1) cout << "Destroyed: FGTable" << endl;
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}
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if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
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}
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if (debug_lvl & 8 ) { // Runtime state variables
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}
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if (debug_lvl & 16) { // Sanity checking
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}
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if (debug_lvl & 64) {
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if (from == 0) { // Constructor
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cout << IdSrc << endl;
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cout << IdHdr << endl;
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}
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}
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}
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}
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