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engines/pegasus/ai/ai_condition.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/stream.h"
+
+#include "pegasus/energymonitor.h"
+#include "pegasus/gamestate.h"
+#include "pegasus/pegasus.h"
+#include "pegasus/ai/ai_condition.h"
+#include "pegasus/items/itemlist.h"
+#include "pegasus/items/biochips/biochipitem.h"
+#include "pegasus/items/inventory/inventoryitem.h"
+
+namespace Pegasus {
+
+AIOneChildCondition::AIOneChildCondition(AICondition *child) {
+	_child = child;
+}
+
+AIOneChildCondition::~AIOneChildCondition() {
+	delete _child;
+}
+
+void AIOneChildCondition::writeAICondition(Common::WriteStream *stream) {
+	if (_child)
+		_child->writeAICondition(stream);
+}
+
+void AIOneChildCondition::readAICondition(Common::ReadStream *stream) {
+	if (_child)
+		_child->readAICondition(stream);
+}
+
+AITwoChildrenCondition::AITwoChildrenCondition(AICondition *leftChild, AICondition *rightChild) {
+	_leftChild = leftChild;
+	_rightChild = rightChild;
+}
+
+AITwoChildrenCondition::~AITwoChildrenCondition() {
+	delete _leftChild;
+	delete _rightChild;
+}
+
+void AITwoChildrenCondition::writeAICondition(Common::WriteStream *stream) {
+	if (_leftChild)
+		_leftChild->writeAICondition(stream);
+
+	if (_rightChild)
+		_rightChild->writeAICondition(stream);
+}
+
+void AITwoChildrenCondition::readAICondition(Common::ReadStream *stream) {
+	if (_leftChild)
+		_leftChild->readAICondition(stream);
+
+	if (_rightChild)
+		_rightChild->readAICondition(stream);
+}
+
+AINotCondition::AINotCondition(AICondition* child) : AIOneChildCondition(child) {
+}
+
+bool AINotCondition::fireCondition() {
+	return _child && !_child->fireCondition();
+}
+
+AIAndCondition::AIAndCondition(AICondition *leftChild, AICondition *rightChild) : AITwoChildrenCondition(leftChild, rightChild) {
+}
+
+bool AIAndCondition::fireCondition() {
+	return _leftChild && _leftChild->fireCondition() && _rightChild && _rightChild->fireCondition();
+}
+
+AIOrCondition::AIOrCondition(AICondition *leftChild, AICondition *rightChild) : AITwoChildrenCondition(leftChild, rightChild) {
+}
+
+bool AIOrCondition::fireCondition() {
+	return (_leftChild && _leftChild->fireCondition()) || (_rightChild && _rightChild->fireCondition());
+}
+
+AITimerCondition::AITimerCondition(const TimeValue time, const TimeScale scale, const bool shouldStartTimer) {
+	_timerFuse.primeFuse(time, scale);
+	_timerFuse.setFunctor(new Common::Functor0Mem<void, AITimerCondition>(this, &AITimerCondition::fire));
+	_fired = false;
+
+	if (shouldStartTimer)
+		startTimer();
+}
+
+void AITimerCondition::startTimer() {
+	_fired = false;
+	_timerFuse.lightFuse();
+}
+
+void AITimerCondition::stopTimer() {
+	_timerFuse.stopFuse();
+}
+
+void AITimerCondition::writeAICondition(Common::WriteStream *stream) {
+	stream->writeByte(_timerFuse.isFuseLit());
+	stream->writeByte(_fired);
+	stream->writeUint32BE(_timerFuse.getTimeRemaining());
+	stream->writeUint32BE(_timerFuse.getFuseScale());
+}
+
+void AITimerCondition::readAICondition(Common::ReadStream *stream) {
+	bool running = stream->readByte();
+	_fired = stream->readByte();
+	TimeValue time = stream->readUint32BE();
+	TimeScale scale = stream->readUint32BE();
+
+	_timerFuse.stopFuse();
+	_timerFuse.primeFuse(time, scale);
+
+	if (running)
+		_timerFuse.lightFuse();
+}
+
+bool AITimerCondition::fireCondition() {
+	return _fired;
+}
+
+void AITimerCondition::fire() {
+	_fired = true;
+}
+
+AILocationCondition::AILocationCondition(uint32 maxLocations) {
+	_numLocations = 0;
+	_maxLocations = maxLocations;
+	_locations = new RoomViewID[maxLocations];
+}
+
+AILocationCondition::~AILocationCondition() {
+	delete[] _locations;
+}
+
+void AILocationCondition::addLocation(const RoomViewID location) {
+	if (_numLocations < _maxLocations)
+		_locations[_numLocations++] = location;
+}
+
+bool AILocationCondition::fireCondition() {
+	RoomViewID test = GameState.getCurrentRoomAndView(), *p;
+	uint32 i;
+
+	for (i = 0, p = _locations; i < _numLocations; i++, p++) {
+		if (test == *p) {
+			*p = MakeRoomView(kNoRoomID, kNoDirection);
+			return true;
+		}
+	}
+
+	return false;
+}
+
+void AILocationCondition::writeAICondition(Common::WriteStream *stream) {
+	stream->writeUint32BE(_maxLocations);
+	stream->writeUint32BE(_numLocations);
+
+	uint32 i;
+	RoomViewID *p;
+	for (i = 0, p = _locations; i < _numLocations; i++, p++)
+		stream->writeUint32BE(*p);
+}
+
+void AILocationCondition::readAICondition(Common::ReadStream *stream) {
+	uint32 maxLocations = stream->readUint32BE();
+
+	if (_maxLocations != maxLocations) {
+		delete[] _locations;
+		_locations = new RoomViewID[maxLocations];
+		_maxLocations = maxLocations;
+	}
+
+	_numLocations = stream->readUint32BE();
+
+	uint32 i;
+	RoomViewID *p;
+	for (i = 0, p = _locations; i < _numLocations; i++, p++)
+		*p = stream->readUint32BE();
+}
+
+AIDoorOpenedCondition::AIDoorOpenedCondition(RoomViewID doorLocation) {
+	_doorLocation = doorLocation;
+}
+
+bool AIDoorOpenedCondition::fireCondition() {
+	return GameState.getCurrentRoomAndView() == _doorLocation && GameState.isCurrentDoorOpen();
+}
+
+AIHasItemCondition::AIHasItemCondition(const ItemID item) {
+	_item = item;
+}
+
+bool AIHasItemCondition::fireCondition() {
+	return _item == kNoItemID || GameState.isTakenItemID(_item);
+}
+
+AIDoesntHaveItemCondition::AIDoesntHaveItemCondition(const ItemID item) {
+	_item = item;
+}
+
+bool AIDoesntHaveItemCondition::fireCondition() {
+	return _item == kNoItemID || !GameState.isTakenItemID(_item);
+}
+
+AICurrentItemCondition::AICurrentItemCondition(const ItemID item) {
+	_item = item;
+}
+
+bool AICurrentItemCondition::fireCondition() {
+	InventoryItem *item = g_vm->getCurrentInventoryItem();
+
+	if (_item == kNoItemID)
+		return item == nullptr;
+
+	return item != nullptr && item->getObjectID() == _item;
+}
+
+AICurrentBiochipCondition::AICurrentBiochipCondition(const ItemID biochip)  {
+	_biochip = biochip;
+}
+
+bool AICurrentBiochipCondition::fireCondition() {
+	BiochipItem *biochip = g_vm->getCurrentBiochip();
+
+	if (_biochip == kNoItemID)
+		return biochip == nullptr;
+
+	return biochip != nullptr && biochip->getObjectID() == _biochip;
+}
+
+AIItemStateCondition::AIItemStateCondition(const ItemID item, const ItemState state) {
+	_item = item;
+	_state = state;
+}
+
+bool AIItemStateCondition::fireCondition() {
+	Item *item = g_allItems.findItemByID(_item);
+	return item != nullptr && item->getItemState() == _state;
+}
+
+AIEnergyMonitorCondition::AIEnergyMonitorCondition(const int32 energyThreshold) {
+	_energyThreshold = energyThreshold;
+}
+
+bool AIEnergyMonitorCondition::fireCondition() {
+	return g_energyMonitor != nullptr && g_energyMonitor->getCurrentEnergy() < _energyThreshold;
+}
+
+AILastExtraCondition::AILastExtraCondition(const ExtraID lastExtra) {
+	_lastExtra = lastExtra;
+}
+
+bool AILastExtraCondition::fireCondition() {
+	return g_neighborhood && (ExtraID)g_neighborhood->getLastExtra() == _lastExtra;
+}
+
+AICondition *makeLocationAndDoesntHaveItemCondition(const RoomID room, const DirectionConstant direction, const ItemID item) {
+	AILocationCondition *location = new AILocationCondition(1);
+	location->addLocation(MakeRoomView(room, direction));
+
+	AIDoesntHaveItemCondition *doesntHaveItem = new AIDoesntHaveItemCondition(item);
+
+	return new AIAndCondition(location, doesntHaveItem);
+}
+
+} // End of namespace Pegasus