From 5de3dd4762ca33a0f92e79ffa4fe2ff67069d531 Mon Sep 17 00:00:00 2001
From: tpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>
Date: Wed, 24 Feb 2010 01:49:02 +0000
Subject: Added KDE3 version of ktechlab

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/ktechlab@1095338 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
---
 src/electronics/simulation/vec.cpp | 166 +++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 src/electronics/simulation/vec.cpp

(limited to 'src/electronics/simulation/vec.cpp')

diff --git a/src/electronics/simulation/vec.cpp b/src/electronics/simulation/vec.cpp
new file mode 100644
index 0000000..d45f505
--- /dev/null
+++ b/src/electronics/simulation/vec.cpp
@@ -0,0 +1,166 @@
+/***************************************************************************
+ *   Copyright (C) 2003-2004 by David Saxton                               *
+ *   david@bluehaze.org                                                    *
+ *                                                                         *
+ *   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.                                   *
+ ***************************************************************************/
+
+#include "vec.h"
+
+#include <assert.h>
+#include <cmath>
+#include <string.h>
+using namespace std;
+
+Vector::Vector( const int size )
+{
+	m_size = size;
+	m_vec = new double[m_size];
+	reset();
+	b_changed = true;
+}
+
+
+Vector::~Vector()
+{
+	// Hmm...this looks like it's the correct format, although valgrind complains
+	// about improper memory use. Interesting. "delete m_vec" definitely leaks
+	// memory, so this seems like the lesser of two evils. I miss C memory allocation
+	// somtimes, with a nice simple free :p
+	delete [] m_vec;
+}
+
+
+void Vector::reset()
+{
+	for ( int i=0; i<m_size; i++ )
+	{
+		m_vec[i] = 0.;
+	}
+	b_changed = true;
+}
+
+
+void Vector::limitTo( double scaleMax, Vector * limitVector )
+{
+	assert( limitVector );
+	assert( limitVector->size() == size() );
+	
+	for ( int i = 0; i < m_size; ++i )
+	{
+		double limitAbs = std::abs( limitVector->m_vec[i] );
+		if ( limitAbs < 1e-6 )
+			limitAbs = 1e-6;
+		
+		double thisAbs = std::abs( m_vec[i] );
+		if ( thisAbs < 1e-6 )
+			thisAbs = 1e-6;
+		
+		if ( (thisAbs / limitAbs) > scaleMax )
+			m_vec[i] /= (thisAbs / limitAbs);
+		
+		else if ( (limitAbs / thisAbs) > scaleMax )
+			m_vec[i] /= (limitAbs / thisAbs);
+	}
+	b_changed = true;
+}
+
+
+void Vector::operator += ( Vector *rhs )
+{
+	if (!rhs) return;
+	for ( int i=0; i<m_size; i++ )
+	{
+		m_vec[i] += (*rhs)[i];
+	}
+	b_changed = true;
+}
+
+
+void Vector::operator -= ( Vector *rhs )
+{
+	if (!rhs) return;
+	for ( int i=0; i<m_size; i++ )
+	{
+		m_vec[i] -= (*rhs)[i];
+	}
+	b_changed = true;
+}
+
+
+void Vector::operator *=( double s )
+{
+	for ( int i=0; i<m_size; i++ )
+	{
+		m_vec[i] *= s;
+	}
+	b_changed = true;
+}
+
+	
+void Vector::operator = ( Vector& v )
+{
+	assert( size() == v.size() );
+	memcpy( m_vec, v.m_vec, m_size * sizeof( double ) );
+	b_changed = true;
+}
+
+
+void Vector::negative( Vector *rhs )
+{
+	if (!rhs) return;
+	for ( int i=0; i<m_size; i++ )
+	{
+		m_vec[i] = -(*rhs)[i];
+	}
+	b_changed = true;
+}
+
+
+double Vector::abs() const
+{
+	double s=0;
+	for ( int i=0; i<m_size; i++ )
+	{
+		s += m_vec[i]*m_vec[i];
+	}
+	return sqrt(s);
+}
+
+
+
+// matrix stuff...
+
+matrix::matrix( const uint size )
+{
+	m_size = size;
+	m_mat = new Vector*[m_size];
+	for ( uint i=0; i<m_size; ++i )
+	{
+		m_mat[i] = new Vector(m_size);
+	}
+}
+
+matrix::~matrix()
+{
+	for ( uint i=0; i<m_size; ++i )
+	{
+		delete m_mat[i];
+	}
+	delete [] m_mat;
+}
+
+
+void matrix::swapRows( const uint a, const uint b )
+{
+	if ( a == b ) return;
+	Vector *v = m_mat[a];
+	m_mat[a] = m_mat[b];
+	m_mat[b] = v;
+}
+
+
+
-- 
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