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Diffstat (limited to 'kbattleship/kbattleship/kbverticalstepstrategy.cpp')
| -rw-r--r-- | kbattleship/kbattleship/kbverticalstepstrategy.cpp | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/kbattleship/kbattleship/kbverticalstepstrategy.cpp b/kbattleship/kbattleship/kbverticalstepstrategy.cpp new file mode 100644 index 00000000..736e9ac8 --- /dev/null +++ b/kbattleship/kbattleship/kbverticalstepstrategy.cpp @@ -0,0 +1,214 @@ +/*************************************************************************** + kbverticalstepstrategy.cpp + ---------- + Developers: (c) 2001 Kevin Krammer <kevin.krammer@gmx.at> + (c) 2001 Nikolas Zimmermann <wildfox@kde.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 <krandomsequence.h> +#include "kbverticalstepstrategy.h" + +KBVerticalStepStrategy::KBVerticalStepStrategy(KBStrategy *parent) : KBStrategy(parent) +{ + m_child = 0; + + if(parent == 0) // only the master destroys ships + { + m_destroyer = new KBDestroyShipStrategy(this); + m_destroying = false; + } + else + { + m_destroyer = 0; + m_destroying = false; + } +} + +KBVerticalStepStrategy::~KBVerticalStepStrategy() +{ + delete m_child; + delete m_destroyer; +} + +void KBVerticalStepStrategy::init(KBattleField *field, const QRect &field_rect) +{ + KBStrategy::init(field, field_rect); + KRandomSequence rand; + m_column = (int) rand.getLong(m_fieldRect.width()); + m_row = (int) rand.getLong(m_fieldRect.height()); + m_start = QPoint(m_column, m_row); + m_passes = 0; + + if(m_destroyer != 0) + m_destroyer->init(field, field_rect); +} + +const QPoint KBVerticalStepStrategy::nextShot() +{ + if(hasMoreShots()) + { + if(m_destroying) + return m_destroyer->nextShot(); + else if(m_passes == 0) + return QPoint(m_column, m_row); + else if(m_parent == 0) + return m_child->nextShot(); + } + + return m_start; +} + +bool KBVerticalStepStrategy::advance() +{ + int col, row; + + col = m_column; + row = m_row; + + while(enemyFieldStateAt(col, row) == KBStrategy::SHOT) + { + row += 2; + if(row >= m_fieldRect.height()) + { + row = m_row % 2; + col = (col + 2) % m_fieldRect.width(); + } + + if(col == m_start.x() && row == m_start.y()) + { + col = (col + 1) % m_fieldRect.width(); + row = (row + 1) % m_fieldRect.height(); + } + } + + if(enemyFieldStateAt(col, row) != KBStrategy::SHOT) + { + m_column = col; + m_row = row; + return true; + } + + return false; +} + +void KBVerticalStepStrategy::setStart(int col, int row) +{ + m_start = QPoint(col, row); + m_column = col; + m_row = row; +} + +bool KBVerticalStepStrategy::hasMoreShots() +{ + if(m_parent != 0) + { + // Child Strategy + if(m_passes == 0) + { + if(enemyFieldStateAt(m_column, m_row) != KBStrategy::SHOT) + return true; + else if(advance()) + return true; + else + { + m_passes++; + return false; + } + } + else + return false; + } + else + { + // Parent Strategy + if((!m_destroying) && m_prevShots.count() > 0) + { + QPoint pos = m_prevShots.last(); + int state = m_battleField->ownState(pos.x(), pos.y()); + if(state == KBattleField::HIT) + { + m_destroying = true; + m_destroyer->destroyShipAt(pos); + } + } + if(m_destroying) + { + if(m_destroyer->hasMoreShots()) + return true; + else + m_destroying = false; + } + + int x, y; + switch(m_passes) + { + case 0: + if(enemyFieldStateAt(m_column, m_row) != KBStrategy::SHOT) + return true; + else if (advance()) + return true; + + m_passes++; + m_child = new KBVerticalStepStrategy(this); + m_child->init(m_battleField, m_fieldRect); + + x = (m_start.x() + 1) % m_fieldRect.width(); + y = (m_start.y() + 1) % m_fieldRect.height(); + m_child->setStart(x, y); + + case 1: + if(m_child->hasMoreShots()) + return true; + + m_passes++; + delete m_child; + + m_child = new KBVerticalStepStrategy(this); + m_child->init(m_battleField, m_fieldRect); + + x = m_start.x(); + y = (m_start.y() + 1) % m_fieldRect.height(); + m_child->setStart(x, y); + + case 2: + if(m_child->hasMoreShots()) + return true; + + m_passes++; + delete m_child; + + m_child = new KBVerticalStepStrategy(this); + m_child->init(m_battleField, m_fieldRect); + + x = (m_start.x() + 1) % m_fieldRect.width(); + y = (m_start.y() + 2) % m_fieldRect.height(); + m_child->setStart(x, y); + + case 3: + if(m_child->hasMoreShots()) + return true; + + m_passes++; + + default: + return false; + } + } +} + +void KBVerticalStepStrategy::shotAt(const QPoint &pos) +{ + m_prevShots.append(pos); + if(m_child != 0) + m_child->shotAt(pos); +} |