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/*
$Id: flow_objects_for_matrix.c,v 1.2 2006-03-15 04:37:08 matju Exp $
GridFlow
Copyright (c) 2001,2002,2003 by Mathieu Bouchard
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
See file ../COPYING for further informations on licensing terms.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "grid.h.fcs"
// produce an upper triangular matrix with ones on the diagonal
// will also affect any additional columns using the same row-operations
void expect_complete_matrix (P<Dim> d) {
if (d->n!=2) RAISE("bletch");
if (d->get(0)>d->get(1)) RAISE("argh");
}
\class GridMatrixSolve < GridObject
struct GridMatrixSolve : GridObject {
Numop *op_sub;
Numop *op_mul;
Numop *op_div;
PtrGrid matrix;
GridMatrixSolve() {
matrix.constrain(expect_complete_matrix);
}
\decl void initialize ();
\grin 0 float
};
GRID_INPUT(GridMatrixSolve,0,matrix) {
int n = matrix->dim->get(0); // # rows
int m = matrix->dim->get(1); // # columns
Pt<T> mat = (Pt<T>)*matrix;
for (int j=0; j<n; j++) {
op_div->map(m,mat+j*m,mat[j*m+j]);
for (int i=j+1; i<n; i++) {
STACK_ARRAY(T,row,m);
COPY(row,mat+j,m);
op_mul->map(m,row,mat[i*m+j]);
op_sub->zip(m,mat+i*m,row);
}
}
GridOutlet out(this,0,matrix->dim);
out.send(n*m,mat);
} GRID_END
\def void initialize () {
rb_call_super(argc,argv);
this->op_sub = op_sub;
this->op_mul = op_mul;
this->op_div = op_div;
}
\classinfo { IEVAL(rself,"install '#matrix_solve',1,1"); }
\end class
void startup_flow_objects_for_matrix () {
\startall
}
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