Added KDE3 version of ktechlab

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/ktechlab@1095338 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 67 insertions, 0 deletions

diff --git a/src/electronics/simulation/currentsignal.cpp b/src/electronics/simulation/currentsignal.cpp
new file mode 100644
index 0000000..5e5388d
--- /dev/null
+++ b/src/electronics/simulation/currentsignal.cpp
@@ -0,0 +1,67 @@
+/***************************************************************************
+ *   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 "currentsignal.h"
+#include "element.h"
+#include "matrix.h"
+
+CurrentSignal::CurrentSignal( const double delta, const double current )
+	: Reactive::Reactive(delta)
+{
+	m_current = current;
+	m_oldCurrent = m_newCurrent = 0.;
+	m_numCNodes = 2;
+}
+
+CurrentSignal::~CurrentSignal()
+{
+}
+
+void CurrentSignal::setCurrent( const double i )
+{
+	if ( m_oldCurrent != m_newCurrent ) add_initial_dc();
+	m_newCurrent *= i/m_current; // Instead of calling step again, we can just "adjust" what the current should be
+	m_current = i;
+	add_initial_dc();
+}
+
+
+void CurrentSignal::add_map()
+{
+	// We don't need a map for current signal :-)
+}
+
+
+void CurrentSignal::add_initial_dc()
+{
+	if ( !b_status )
+		return;
+	
+	if ( m_newCurrent == m_oldCurrent )
+		return;
+
+	b_i( 0 ) -= m_newCurrent-m_oldCurrent;
+	b_i( 1 ) += m_newCurrent-m_oldCurrent;
+	
+	m_oldCurrent = m_newCurrent;
+}
+
+void CurrentSignal::updateCurrents()
+{
+	m_cnodeI[1] = m_newCurrent;
+	m_cnodeI[0] = -m_newCurrent;
+}
+
+void CurrentSignal::time_step()
+{
+	add_initial_dc(); // Make sure our old and new are synced
+	m_newCurrent = m_current*advance();
+	add_initial_dc();
+}