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, 144 insertions, 0 deletions

diff --git a/src/mechanics/chassiscircular2.cpp b/src/mechanics/chassiscircular2.cpp
new file mode 100644
index 0000000..91b9f0a
--- /dev/null
+++ b/src/mechanics/chassiscircular2.cpp
@@ -0,0 +1,144 @@
+/***************************************************************************
+ *   Copyright (C) 2005 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 "chassiscircular2.h"
+
+#include "libraryitem.h"
+
+#include <klocale.h>
+#include <qpainter.h>
+#include <qwmatrix.h>
+
+#include <algorithm>
+#include <cmath>
+
+double normalizeAngle( double angle );
+
+
+Item* ChassisCircular2::construct( ItemDocument *itemDocument, bool newItem, const char *id )
+{
+	return new ChassisCircular2( (MechanicsDocument*)itemDocument, newItem, id );
+}
+
+
+LibraryItem* ChassisCircular2::libraryItem()
+{
+	return new LibraryItem(
+		QString("mech/chassis_circular_2"),
+		i18n("Circular 2-Wheel Chassis"),
+		i18n("Chassis'"),
+		"chassis.png",
+		LibraryItem::lit_mechanical,
+		ChassisCircular2::construct );
+}
+
+
+ChassisCircular2::ChassisCircular2( MechanicsDocument *mechanicsDocument, bool newItem, const char *id )
+	: MechanicsItem( mechanicsDocument, newItem, (id) ? id : "chassis_circular_2" )
+{
+	m_name = i18n("Circular 2-Wheel Chassis");
+	m_desc = i18n("A circular base with two wheels and a support point.");
+	
+	m_theta1 = 0.0;
+	m_theta2 = 0.0;
+	
+	QPointArray pa;
+	pa.makeEllipse( -25, -25, 50, 50 );
+	QWMatrix m(4,0,0,4,0,0);
+	m.setTransformationMode( QWMatrix::Areas );
+	pa = m.map(pa);
+	setItemPoints(pa);
+	
+	itemResized();
+}
+
+
+ChassisCircular2::~ChassisCircular2()
+{
+}
+
+
+void ChassisCircular2::itemResized()
+{
+	const double w = sizeRect().width();
+	const double h = sizeRect().height();
+	
+	m_wheel1Pos = QRect( int(w/5), int(h/6), int(w/4), int(h/8) );
+	m_wheel2Pos = QRect( int(w/5), int(5*h/6-h/8), int(w/4), int(h/8) );
+}
+
+
+void ChassisCircular2::advance( int phase )
+{
+	if ( phase != 1 )
+		return;
+	
+	double speed1 = 60.; // pixels per second
+	double speed2 = 160.; // pixels per second
+	
+	m_theta1 = normalizeAngle( m_theta1 + (speed1/1000.)/m_wheel1Pos.width() );
+	m_theta2 = normalizeAngle( m_theta2 + (speed2/1000.)/m_wheel2Pos.width() );
+	
+	const double d1 = speed1/1000.;
+	const double d2 = speed2/1000.;
+	const double sep = m_wheel2Pos.center().y()-m_wheel1Pos.center().y();
+	
+	double dtheta = std::atan( (d2-d1)/sep ); // Change in orientation of chassis
+	double moveAngle = absolutePosition().angle()+dtheta/2;
+	rotateBy(dtheta);
+	moveBy( ((d1+d2)/2.)*std::cos(moveAngle), ((d1+d2)/2.)*std::sin(moveAngle) );
+}
+
+
+void ChassisCircular2::drawShape( QPainter &p )
+{
+	const double _x = int(sizeRect().x() + x());
+	const double _y = int(sizeRect().y() + y());
+	const double w = sizeRect().width();
+	const double h = sizeRect().height(); 
+	
+	initPainter(p);
+	p.setBrush( QColor( 255, 246, 210 ) );
+	QRect circleRect = sizeRect();
+	circleRect.moveLeft( int(circleRect.left() + x()) );
+	circleRect.moveTop( int(circleRect.top() + y()) );
+	p.drawEllipse(circleRect);
+	
+	// Draw wheels
+	// TODO get this info from m_wheel1Pos and m_wheel2Pos
+	const double X = _x+(w/5); // Wheel's left pos
+	const double H = h/8; // Wheel's height
+	const double y1 = _y+(h/6); // Wheel 1 y-pos
+	const double y2 = _y+(5*h/6)-H; // Wheel 2 y-pos
+	
+	p.setPen( Qt::NoPen );
+	const double stripeWidth = 5;
+	const double offset2 = 1 + int(m_theta1*m_wheel1Pos.width())%int(2*stripeWidth);
+	const double offset1 = 1 + int(m_theta2*m_wheel2Pos.width())%int(2*stripeWidth);
+	p.setBrush( QColor( 255, 232, 182 ) );
+	for ( double i=-1; i<std::ceil(m_wheel1Pos.width()/stripeWidth); ++i )
+	{
+		
+		p.setClipRect( QRect( int(_x+m_wheel1Pos.x()+2), int(_y+m_wheel1Pos.y()+2), int(m_wheel1Pos.width()-4), int(m_wheel1Pos.height()-4) ), QPainter::CoordPainter );
+		p.drawRect( int(offset1+X + i*stripeWidth*2), int(y1+1), int(stripeWidth), int(H-2) );
+		
+		p.setClipRect( QRect( int(_x+m_wheel2Pos.x()+2), int(_y+m_wheel2Pos.y()+2), int(m_wheel2Pos.width()-4), int(m_wheel2Pos.height()-4) ), QPainter::CoordPainter );
+		p.drawRect( int(offset2+X + i*stripeWidth*2), int(y2+1), int(stripeWidth), int(H-2) );
+	}
+	p.setClipping(false);
+	
+	p.setPen( Qt::black );
+	p.setBrush( Qt::NoBrush );
+	p.drawRoundRect( int(X), int(y1), int(w/4), int(H), 25, 50 );
+	p.drawRoundRect( int(X), int(y2), int(w/4), int(H), 25, 50 );
+	
+	
+	deinitPainter(p);
+}