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Diffstat (limited to 'examples/statemachine/tankgame/tankitem.cpp')
| -rw-r--r-- | examples/statemachine/tankgame/tankitem.cpp | 302 |
1 files changed, 0 insertions, 302 deletions
diff --git a/examples/statemachine/tankgame/tankitem.cpp b/examples/statemachine/tankgame/tankitem.cpp deleted file mode 100644 index 192b272d7..000000000 --- a/examples/statemachine/tankgame/tankitem.cpp +++ /dev/null @@ -1,302 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the either Technology Preview License Agreement or the -** Beta Release License Agreement. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain -** additional rights. These rights are described in the Nokia Qt LGPL -** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this -** package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 3.0 as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU General Public License version 3.0 requirements will be -** met: http://www.gnu.org/copyleft/gpl.html. -** -** If you are unsure which license is appropriate for your use, please -** contact the sales department at http://www.qtsoftware.com/contact. -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "tankitem.h" - -#include <QPainter> -#include <QGraphicsScene> -#include <QDebug> - -#include <math.h> - -#ifndef M_PI -#define M_PI 3.14159265358979323846 -#endif - -class Action -{ -public: - Action(TankItem *item) : m_item(item) - { - } - - TankItem *item() const { return m_item; } - void setItem(TankItem *item) { m_item = item; } - - virtual bool apply(qreal timeDelta) = 0; - -private: - TankItem *m_item; -}; - -class MoveAction: public Action -{ -public: - MoveAction(TankItem *item, qreal distance) - : Action(item), m_distance(distance) - { - m_reverse = m_distance < 0.0; - } - - bool apply(qreal timeDelta) - { - qreal dist = timeDelta * item()->speed() * (m_reverse ? -1.0 : 1.0); - - bool done = false; - if (qAbs(m_distance) < qAbs(dist)) { - done = true; - dist = m_distance; - } - m_distance -= dist; - - qreal a = item()->direction() * M_PI / 180.0; - - qreal yd = dist * sin(a); - qreal xd = dist * sin(M_PI / 2.0 - a); - - item()->setPos(item()->pos() + QPointF(xd, yd)); - return !done; - } - -private: - qreal m_distance; - bool m_reverse; -}; - -class TurnAction: public Action -{ -public: - TurnAction(TankItem *item, qreal distance) - : Action(item), m_distance(distance) - { - m_reverse = m_distance < 0.0; - } - - bool apply(qreal timeDelta) - { - qreal dist = timeDelta * item()->angularSpeed() * (m_reverse ? -1.0 : 1.0); - bool done = false; - if (qAbs(m_distance) < qAbs(dist)) { - done = true; - dist = m_distance; - } - m_distance -= dist; - - item()->setDirection(item()->direction() + dist); - return !done; - } - -private: - qreal m_distance; - bool m_reverse; -}; - -TankItem::TankItem(QObject *parent) - : GameItem(parent), m_currentAction(0), m_currentDirection(0.0), m_enabled(true) -{ - connect(this, SIGNAL(cannonFired()), this, SIGNAL(actionCompleted())); -} - -void TankItem::idle(qreal elapsed) -{ - if (m_enabled) { - if (m_currentAction != 0) { - if (!m_currentAction->apply(elapsed)) { - setAction(0); - emit actionCompleted(); - } - - QGraphicsItem *item = 0; - qreal distance = distanceToObstacle(&item); - if (TankItem *tankItem = qgraphicsitem_cast<TankItem *>(item)) - emit tankSpotted(tankItem->direction(), distance); - } - } -} - -void TankItem::hitByRocket() -{ - emit aboutToBeDestroyed(); - deleteLater(); -} - -void TankItem::setAction(Action *newAction) -{ - if (m_currentAction != 0) - delete m_currentAction; - - m_currentAction = newAction; -} - -void TankItem::fireCannon() -{ - emit cannonFired(); -} - -void TankItem::moveForwards(qreal length) -{ - setAction(new MoveAction(this, length)); -} - -void TankItem::moveBackwards(qreal length) -{ - setAction(new MoveAction(this, -length)); -} - -void TankItem::turn(qreal degrees) -{ - setAction(new TurnAction(this, degrees)); -} - -void TankItem::turnTo(qreal degrees) -{ - setAction(new TurnAction(this, degrees - direction())); -} - -void TankItem::stop() -{ - setAction(0); -} - -QVariant TankItem::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value) -{ - if (change == ItemPositionChange && scene()) { - QPointF requestedPosition = value.toPointF(); - QLineF collidedLine; - QPointF nextPoint = tryMove(requestedPosition, &collidedLine); - if (nextPoint != requestedPosition) - emit collision(collidedLine); - return nextPoint; - } else { - return QGraphicsItem::itemChange(change, value); - } -} - - -void TankItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) -{ - QRectF brect = boundingRect(); - - painter->setBrush(m_color); - painter->setPen(Qt::black); - - // body - painter->drawRect(brect.adjusted(0.0, 4.0, -2.0, -4.0)); - - // cannon - QRectF cannonBase = brect.adjusted(10.0, 6.0, -12.0, -6.0); - painter->drawEllipse(cannonBase); - - painter->drawRect(QRectF(QPointF(cannonBase.center().x(), cannonBase.center().y() - 2.0), - QPointF(brect.right(), cannonBase.center().y() + 2.0))); - - // left track - painter->setBrush(QBrush(Qt::black, Qt::VerPattern)); - QRectF leftTrackRect = QRectF(brect.topLeft(), QPointF(brect.right() - 2.0, brect.top() + 4.0)); - painter->fillRect(leftTrackRect, Qt::darkYellow); - painter->drawRect(leftTrackRect); - - // right track - QRectF rightTrackRect = QRectF(QPointF(brect.left(), brect.bottom() - 4.0), - QPointF(brect.right() - 2.0, brect.bottom())); - painter->fillRect(rightTrackRect, Qt::darkYellow); - painter->drawRect(rightTrackRect); - - if (!m_enabled) { - painter->setPen(QPen(Qt::red, 5)); - - painter->drawEllipse(brect); - - QPainterPath path; - path.addEllipse(brect); - painter->setClipPath(path); - painter->drawLine(brect.topRight(), brect.bottomLeft()); - } -} - -QRectF TankItem::boundingRect() const -{ - return QRectF(-20.0, -10.0, 40.0, 20.0); -} - -qreal TankItem::direction() const -{ - return m_currentDirection; -} - -void TankItem::setDirection(qreal newDirection) -{ - int fullRotations = int(newDirection) / 360; - newDirection -= fullRotations * 360.0; - - qreal diff = newDirection - m_currentDirection; - m_currentDirection = newDirection; - rotate(diff); -} - -qreal TankItem::distanceToObstacle(QGraphicsItem **obstacle) const -{ - qreal dist = sqrt(pow(scene()->sceneRect().width(), 2) + pow(scene()->sceneRect().height(), 2)); - - qreal a = m_currentDirection * M_PI / 180.0; - - qreal yd = dist * sin(a); - qreal xd = dist * sin(M_PI / 2.0 - a); - - QPointF requestedPosition = pos() + QPointF(xd, yd); - QGraphicsItem *collidedItem = 0; - QPointF nextPosition = tryMove(requestedPosition, 0, &collidedItem); - if (collidedItem != 0) { - if (obstacle != 0) - *obstacle = collidedItem; - - QPointF d = nextPosition - pos(); - return sqrt(pow(d.x(), 2) + pow(d.y(), 2)); - } else { - return 0.0; - } -} - -qreal TankItem::distanceToObstacle() const -{ - return distanceToObstacle(0); -} - |