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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.
*
* 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.
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/stream.h"
#include "draci/draci.h"
#include "draci/game.h"
#include "draci/barchive.h"
#include "draci/script.h"
#include "draci/animation.h"
#include <cmath>
namespace Draci {
static double real_to_double(byte real[6]);
Game::Game(DraciEngine *vm) : _vm(vm) {
unsigned int i;
BArchive *initArchive = _vm->_initArchive;
BAFile *file;
// Read in persons
file = initArchive->getFile(5);
Common::MemoryReadStream personData(file->_data, file->_length);
unsigned int numPersons = file->_length / personSize;
_persons = new Person[numPersons];
for (i = 0; i < numPersons; ++i) {
_persons[i]._x = personData.readUint16LE();
_persons[i]._y = personData.readUint16LE();
_persons[i]._fontColour = personData.readByte();
}
// Close persons file
file->close();
// Read in dialog offsets
file = initArchive->getFile(4);
Common::MemoryReadStream dialogData(file->_data, file->_length);
unsigned int numDialogs = file->_length / sizeof(uint16);
_dialogOffsets = new uint[numDialogs];
unsigned int curOffset;
for (i = 0, curOffset = 0; i < numDialogs; ++i) {
_dialogOffsets[i] = curOffset;
curOffset += dialogData.readUint16LE();
}
// Close dialogs file
file->close();
// Read in game info
file = initArchive->getFile(3);
Common::MemoryReadStream gameData(file->_data, file->_length);
_info._startRoom = gameData.readByte() - 1;
_info._mapRoom = gameData.readByte() - 1;
_info._numObjects = gameData.readUint16LE();
_info._numIcons = gameData.readUint16LE();
_info._numVariables = gameData.readByte();
_info._numPersons = gameData.readByte();
_info._numDialogs = gameData.readByte();
_info._maxIconWidth = gameData.readUint16LE();
_info._maxIconHeight = gameData.readUint16LE();
_info._musicLength = gameData.readUint16LE();
_info._crc[0] = gameData.readUint16LE();
_info._crc[1] = gameData.readUint16LE();
_info._crc[2] = gameData.readUint16LE();
_info._crc[3] = gameData.readUint16LE();
_info._numDialogBlocks = curOffset;
// Close game info file
file->close();
// Read in variables
file = initArchive->getFile(2);
unsigned int numVariables = file->_length / sizeof (int16);
_variables = new int[numVariables];
Common::MemoryReadStream variableData(file->_data, file->_length);
for (i = 0; i < numVariables; ++i) {
_variables[i] = variableData.readUint16LE();
}
// Close variables file
file->close();
// Read in item icon status
file = initArchive->getFile(1);
_iconStatus = file->_data;
uint numIcons = file->_length;
// Read in object status
file = initArchive->getFile(0);
unsigned int numObjects = file->_length;
_objects = new GameObject[numObjects];
Common::MemoryReadStream objStatus(file->_data, file->_length);
for (i = 0; i < numObjects; ++i) {
byte tmp = objStatus.readByte();
// Set object visibility
_objects[i]._visible = tmp & (1 << 7);
// Set object location
_objects[i]._location = (~(1 << 7) & tmp) - 1;
}
// Close object status file
file->close();
assert(numDialogs == _info._numDialogs);
assert(numPersons == _info._numPersons);
assert(numVariables == _info._numVariables);
assert(numObjects == _info._numObjects);
assert(numIcons == _info._numIcons);
}
void Game::start() {
while (!shouldQuit()) {
// If the scheduled room differs from the current one, do a room change
if (_newRoom != _currentRoom._roomNum) {
// Set the first two variables to the new room / gate
_variables[0] = _newGate;
_variables[1] = _newRoom;
// If the new room is the map room, set the appropriate coordinates
// for the dragon in the persons array
if (_newRoom == _info._mapRoom) {
_persons[kDragonObject]._x = 160;
_persons[kDragonObject]._y = 0;
}
setLoopSubstatus(kStatusOrdinary);
// Do the actual change
changeRoom(_newRoom);
// Set the current room / gate to the new value
_currentRoom._roomNum = _newRoom;
_currentGate = _newGate;
// HACK: Won't be needed once I've implemented the loop properly
_roomChange = false;
// Run the program for the gate the dragon came through
runGateProgram(_newGate);
}
// Mimic the original engine by setting the loop status to Ordinary before
// entering the main loop
setLoopStatus(kStatusOrdinary);
loop();
}
}
void Game::init() {
_shouldQuit = false;
_shouldExitLoop = false;
// HACK: Won't be needed once I've implemented the loop properly
_roomChange = false;
_loopStatus = kStatusOrdinary;
_objUnderCursor = kOverlayImage;
// Initialize animation for object / room titles
Animation *titleAnim = _vm->_anims->addText(kTitleText, true);
Text *title = new Text("", _vm->_smallFont, kTitleColour, 0, 0);
titleAnim->addFrame(title);
// Initialize animation for speech text
Animation *speechAnim = _vm->_anims->addText(kSpeechText, true);
Text *speech = new Text("", _vm->_bigFont, kFontColour1, 0, 0);
speechAnim->addFrame(speech);
loadObject(kDragonObject);
GameObject *dragon = getObject(kDragonObject);
debugC(4, kDraciLogicDebugLevel, "Running init program for the dragon object...");
_vm->_script->run(dragon->_program, dragon->_init);
_currentRoom._roomNum = _info._startRoom;
_currentGate = 0;
_newRoom = _currentRoom._roomNum;
_newGate = _currentGate;
_variables[0] = _currentGate;
_variables[1] = _currentRoom._roomNum;
changeRoom(_currentRoom._roomNum);
runGateProgram(_currentGate);
}
void Game::loop() {
Surface *surface = _vm->_screen->getSurface();
const int smallFontHeight = _vm->_smallFont->getFontHeight();
do {
_vm->handleEvents();
if (_currentRoom._mouseOn) {
// Fetch mouse coordinates
int x = _vm->_mouse->getPosX();
int y = _vm->_mouse->getPosY();
// Find the game object under the cursor
// (to be more precise, one that corresponds to the animation under the cursor)
int animUnderCursor = _vm->_anims->getTopAnimationID(x, y);
int curObject = getObjectWithAnimation(animUnderCursor);
GameObject *obj = &_objects[curObject];
// Fetch the dedicated objects' title animation / current frame
Animation *titleAnim = _vm->_anims->getAnimation(kTitleText);
Text *title = reinterpret_cast<Text *>(titleAnim->getFrame());
if (_loopStatus == kStatusOrdinary) {
// If there is an object under the cursor, display its title and enable
// executing its look and use scripts
if (curObject != kObjectNotFound) {
if(_vm->_mouse->isCursorOn()) {
// Mark dirty rectangle to delete the previous text
titleAnim->markDirtyRect(surface);
// Set the title for the current object
title->setText(obj->_title);
// Move the title to the correct place (just above the cursor)
int newX = surface->centerOnX(x, title->getWidth());
int newY = surface->centerOnY(y - smallFontHeight / 2, title->getHeight() * 2);
titleAnim->setRelative(newX, newY);
}
if (_loopSubstatus == kStatusOrdinary) {
if (_vm->_mouse->lButtonPressed()) {
// Delete title text
title->setText("");
_vm->_mouse->cursorOff();
_vm->_mouse->lButtonSet(false);
if (!obj->_imLook) {
if (obj->_lookDir == 0) {
walkHero(x, y);
} else {
walkHero(obj->_lookX, obj->_lookY);
}
}
_vm->_script->run(obj->_program, obj->_look);
_vm->_mouse->cursorOn();
}
// TODO: Handle global use scripts (the use script for the room itself)
if (_vm->_mouse->rButtonPressed()) {
// Delete title text
title->setText("");
_vm->_mouse->rButtonSet(false);
if (_vm->_script->testExpression(obj->_program, obj->_canUse)) {
_vm->_mouse->cursorOff();
if (!obj->_imUse) {
if (obj->_useDir == 0) {
walkHero(x, y);
} else {
walkHero(obj->_useX, obj->_useY);
}
}
_vm->_script->run(obj->_program, obj->_use);
_vm->_mouse->cursorOn();
} else {
walkHero(x, y);
}
}
}
} else {
// We haven't found an object under the cursor
// Delete the previous title
titleAnim->markDirtyRect(surface);
title->setText("");
// If we are in the appropriate loop status and the player clicked
// on the room, move the dragon to the nearest walkable point
if (_vm->_mouse->lButtonPressed() &&
_loopSubstatus == kStatusOrdinary) {
walkHero(x, y);
}
}
debugC(2, kDraciAnimationDebugLevel, "Anim under cursor: %d", animUnderCursor);
}
}
// Handle character talking (if there is any)
if (_loopSubstatus == kStatusTalk) {
Animation *speechAnim = _vm->_anims->getAnimation(kSpeechText);
Text *speechFrame = reinterpret_cast<Text *>(speechAnim->getFrame());
uint speechDuration = kBaseSpeechDuration +
speechFrame->getLength() * kSpeechTimeUnit /
(128 / 16 + 1);
// If the current speech text has expired or the user clicked a mouse button,
// advance to the next line of text
if (_vm->_mouse->lButtonPressed() ||
_vm->_mouse->rButtonPressed() ||
(_vm->_system->getMillis() - _speechTick) >= speechDuration) {
_shouldExitLoop = true;
_vm->_mouse->lButtonSet(false);
_vm->_mouse->rButtonSet(false);
} else {
_shouldExitLoop = false;
}
}
// This returns true if we got a signal to quit the game
if (shouldQuit())
return;
// Advance animations and redraw screen
_vm->_anims->drawScene(_vm->_screen->getSurface());
_vm->_screen->copyToScreen();
_vm->_system->delayMillis(20);
// HACK: Won't be needed once the game loop is implemented properly
_shouldExitLoop = _shouldExitLoop || _roomChange;
} while (!shouldExitLoop());
}
int Game::getObjectWithAnimation(int animID) {
for (uint i = 0; i < _info._numObjects; ++i) {
GameObject *obj = &_objects[i];
for (uint j = 0; j < obj->_anims.size(); ++j) {
if (obj->_anims[j] == animID) {
return i;
}
}
}
return kObjectNotFound;
}
void Game::walkHero(int x, int y) {
Surface *surface = _vm->_screen->getSurface();
Common::Point p = _currentRoom._walkingMap.findNearestWalkable(x, y, surface->getRect());
x = p.x;
y = p.y;
// Fetch dragon's animation ID
// FIXME: Need to add proper walking (this only warps the dragon to position)
int animID = getObject(kDragonObject)->_anims[0];
Animation *anim = _vm->_anims->getAnimation(animID);
// Calculate scaling factors
double scaleX = _currentRoom._pers0 + _currentRoom._persStep * y;
double scaleY = scaleX;
// Set the Z coordinate for the dragon's animation
anim->setZ(y+1);
// Fetch current frame
Drawable *frame = anim->getFrame();
// Fetch base dimensions of the frame
uint height = frame->getHeight();
uint width = frame->getWidth();
_persons[kDragonObject]._x = x + (lround(scaleX) * width) / 2;
_persons[kDragonObject]._y = y - lround(scaleY) * height;
// We naturally want the dragon to position its feet to the location of the
// click but sprites are drawn from their top-left corner so we subtract
// the current height of the dragon's sprite
y -= (int)(scaleY * height);
anim->setRelative(x, y);
// Set the per-animation scaling factor
anim->setScaleFactors(scaleX, scaleY);
// Play the animation
_vm->_anims->play(animID);
debugC(4, kDraciLogicDebugLevel, "Walk to x: %d y: %d", x, y);
}
void Game::loadRoom(int roomNum) {
BAFile *f;
f = _vm->_roomsArchive->getFile(roomNum * 4);
Common::MemoryReadStream roomReader(f->_data, f->_length);
roomReader.readUint32LE(); // Pointer to room program, not used
roomReader.readUint16LE(); // Program length, not used
roomReader.readUint32LE(); // Pointer to room title, not used
_currentRoom._music = roomReader.readByte();
int mapIdx = roomReader.readByte() - 1;
f = _vm->_walkingMapsArchive->getFile(mapIdx);
_currentRoom._walkingMap.load(f->_data, f->_length);
_currentRoom._palette = roomReader.readByte() - 1;
_currentRoom._numOverlays = roomReader.readSint16LE();
_currentRoom._init = roomReader.readSint16LE();
_currentRoom._look = roomReader.readSint16LE();
_currentRoom._use = roomReader.readSint16LE();
_currentRoom._canUse = roomReader.readSint16LE();
_currentRoom._imInit = roomReader.readByte();
_currentRoom._imLook = roomReader.readByte();
_currentRoom._imUse = roomReader.readByte();
_currentRoom._mouseOn = roomReader.readByte();
_currentRoom._heroOn = roomReader.readByte();
// Read in pers0 and persStep (stored as 6-byte Pascal reals)
byte real[6];
for (int i = 5; i >= 0; --i) {
real[i] = roomReader.readByte();
}
_currentRoom._pers0 = real_to_double(real);
for (int i = 5; i >= 0; --i) {
real[i] = roomReader.readByte();
}
_currentRoom._persStep = real_to_double(real);
_currentRoom._escRoom = roomReader.readByte() - 1;
_currentRoom._numGates = roomReader.readByte();
debugC(4, kDraciLogicDebugLevel, "Music: %d", _currentRoom._music);
debugC(4, kDraciLogicDebugLevel, "Map: %d", mapIdx);
debugC(4, kDraciLogicDebugLevel, "Palette: %d", _currentRoom._palette);
debugC(4, kDraciLogicDebugLevel, "Overlays: %d", _currentRoom._numOverlays);
debugC(4, kDraciLogicDebugLevel, "Init: %d", _currentRoom._init);
debugC(4, kDraciLogicDebugLevel, "Look: %d", _currentRoom._look);
debugC(4, kDraciLogicDebugLevel, "Use: %d", _currentRoom._use);
debugC(4, kDraciLogicDebugLevel, "CanUse: %d", _currentRoom._canUse);
debugC(4, kDraciLogicDebugLevel, "ImInit: %d", _currentRoom._imInit);
debugC(4, kDraciLogicDebugLevel, "ImLook: %d", _currentRoom._imLook);
debugC(4, kDraciLogicDebugLevel, "ImUse: %d", _currentRoom._imUse);
debugC(4, kDraciLogicDebugLevel, "MouseOn: %d", _currentRoom._mouseOn);
debugC(4, kDraciLogicDebugLevel, "HeroOn: %d", _currentRoom._heroOn);
debugC(4, kDraciLogicDebugLevel, "Pers0: %f", _currentRoom._pers0);
debugC(4, kDraciLogicDebugLevel, "PersStep: %f", _currentRoom._persStep);
debugC(4, kDraciLogicDebugLevel, "EscRoom: %d", _currentRoom._escRoom);
debugC(4, kDraciLogicDebugLevel, "Gates: %d", _currentRoom._numGates);
// Read in the gates' numbers
_currentRoom._gates.clear();
for (uint i = 0; i < _currentRoom._numGates; ++i) {
_currentRoom._gates.push_back(roomReader.readSint16LE());
}
// Load the room's objects
for (uint i = 0; i < _info._numObjects; ++i) {
debugC(7, kDraciLogicDebugLevel,
"Checking if object %d (%d) is at the current location (%d)", i,
_objects[i]._location, roomNum);
if (_objects[i]._location == roomNum) {
debugC(6, kDraciLogicDebugLevel, "Loading object %d from room %d", i, roomNum);
loadObject(i);
}
}
// Run the init scripts for room objects
// We can't do this in the above loop because some objects' scripts reference
// other objects that may not yet be loaded
for (uint i = 0; i < _info._numObjects; ++i) {
if (_objects[i]._location == roomNum) {
debugC(6, kDraciLogicDebugLevel,
"Running init program for object %d (offset %d)", i, getObject(i)->_init);
_vm->_script->run(getObject(i)->_program, getObject(i)->_init);
}
}
// Load the room's GPL program and run the init part
f = _vm->_roomsArchive->getFile(roomNum * 4 + 3);
_currentRoom._program._bytecode = f->_data;
_currentRoom._program._length = f->_length;
debugC(4, kDraciLogicDebugLevel, "Running room init program...");
_vm->_script->run(_currentRoom._program, _currentRoom._init);
// Set room palette
f = _vm->_paletteArchive->getFile(_currentRoom._palette);
_vm->_screen->setPalette(f->_data, 0, kNumColours);
// Set cursor state
// Need to do this after we set the palette since the cursors use it
if (_currentRoom._mouseOn) {
debugC(6, kDraciLogicDebugLevel, "Mouse: ON");
_vm->_mouse->cursorOn();
} else {
debugC(6, kDraciLogicDebugLevel, "Mouse: OFF");
_vm->_mouse->cursorOff();
}
_vm->_mouse->setCursorType(kNormalCursor);
// HACK: Create a visible overlay from the walking map so we can test it
byte *wlk = new byte[kScreenWidth * kScreenHeight];
memset(wlk, 255, kScreenWidth * kScreenHeight);
for (uint i = 0; i < kScreenWidth; ++i) {
for (uint j = 0; j < kScreenHeight; ++j) {
if (_currentRoom._walkingMap.isWalkable(i, j)) {
wlk[j * kScreenWidth + i] = 2;
}
}
}
Sprite *ov = new Sprite(wlk, kScreenWidth, kScreenHeight, 0, 0, false);
Animation *map = _vm->_anims->addAnimation(kWalkingMapOverlay, 255, false);
map->addFrame(ov);
}
int Game::loadAnimation(uint animNum, uint z) {
BAFile *animFile = _vm->_animationsArchive->getFile(animNum);
Common::MemoryReadStream animationReader(animFile->_data, animFile->_length);
uint numFrames = animationReader.readByte();
// FIXME: handle these properly
animationReader.readByte(); // Memory logic field, not used
animationReader.readByte(); // Disable erasing field, not used
bool cyclic = animationReader.readByte();
animationReader.readByte(); // Relative field, not used
Animation *anim = _vm->_anims->addAnimation(animNum, z, false);
anim->setLooping(cyclic);
for (uint i = 0; i < numFrames; ++i) {
uint spriteNum = animationReader.readUint16LE() - 1;
int x = animationReader.readSint16LE();
int y = animationReader.readSint16LE();
uint scaledWidth = animationReader.readUint16LE();
uint scaledHeight = animationReader.readUint16LE();
byte mirror = animationReader.readByte();
/* uint sample = */ animationReader.readUint16LE();
/* uint freq = */ animationReader.readUint16LE();
uint delay = animationReader.readUint16LE();
BAFile *spriteFile = _vm->_spritesArchive->getFile(spriteNum);
Sprite *sp = new Sprite(spriteFile->_data, spriteFile->_length, x, y, true);
// Some frames set the scaled dimensions to 0 even though other frames
// from the same animations have them set to normal values
// We work around this by assuming it means no scaling is necessary
if (scaledWidth == 0) {
scaledWidth = sp->getWidth();
}
if (scaledHeight == 0) {
scaledHeight = sp->getHeight();
}
sp->setScaled(scaledWidth, scaledHeight);
if (mirror)
sp->setMirrorOn();
sp->setDelay(delay * 10);
anim->addFrame(sp);
}
return animNum;
}
void Game::loadObject(uint objNum) {
BAFile *file;
file = _vm->_objectsArchive->getFile(objNum * 3);
Common::MemoryReadStream objReader(file->_data, file->_length);
GameObject *obj = _objects + objNum;
obj->_init = objReader.readUint16LE();
obj->_look = objReader.readUint16LE();
obj->_use = objReader.readUint16LE();
obj->_canUse = objReader.readUint16LE();
obj->_imInit = objReader.readByte();
obj->_imLook = objReader.readByte();
obj->_imUse = objReader.readByte();
obj->_walkDir = objReader.readByte();
obj->_z = objReader.readByte();
objReader.readUint16LE(); // idxSeq field, not used
objReader.readUint16LE(); // numSeq field, not used
obj->_lookX = objReader.readUint16LE();
obj->_lookY = objReader.readUint16LE();
obj->_useX = objReader.readUint16LE();
obj->_useY = objReader.readUint16LE();
obj->_lookDir = objReader.readByte();
obj->_useDir = objReader.readByte();
obj->_absNum = objNum;
file = _vm->_objectsArchive->getFile(objNum * 3 + 1);
// The first byte of the file is the length of the string (without the length)
assert(file->_length - 1 == file->_data[0]);
obj->_title = Common::String((char *)(file->_data+1), file->_length-1);
file = _vm->_objectsArchive->getFile(objNum * 3 + 2);
obj->_program._bytecode = file->_data;
obj->_program._length = file->_length;
}
GameObject *Game::getObject(uint objNum) {
return _objects + objNum;
}
uint Game::getNumObjects() {
return _info._numObjects;
}
void Game::loadOverlays() {
uint x, y, z, num;
BAFile *overlayHeader;
overlayHeader = _vm->_roomsArchive->getFile(_currentRoom._roomNum * 4 + 2);
Common::MemoryReadStream overlayReader(overlayHeader->_data, overlayHeader->_length);
BAFile *overlayFile;
for (int i = 0; i < _currentRoom._numOverlays; i++) {
num = overlayReader.readUint16LE() - 1;
x = overlayReader.readUint16LE();
y = overlayReader.readUint16LE();
z = overlayReader.readByte();
overlayFile = _vm->_overlaysArchive->getFile(num);
Sprite *sp = new Sprite(overlayFile->_data, overlayFile->_length, x, y, true);
_vm->_anims->addOverlay(sp, z);
}
_vm->_overlaysArchive->clearCache();
_vm->_screen->getSurface()->markDirty();
}
void Game::changeRoom(uint roomNum) {
debugC(1, kDraciLogicDebugLevel, "Changing to room %d", roomNum);
// Clear archives
_vm->_roomsArchive->clearCache();
_vm->_spritesArchive->clearCache();
_vm->_paletteArchive->clearCache();
_vm->_animationsArchive->clearCache();
_vm->_walkingMapsArchive->clearCache();
_vm->_screen->clearScreen();
_vm->_anims->deleteOverlays();
// Delete walking map testing overlay
_vm->_anims->deleteAnimation(kWalkingMapOverlay);
int oldRoomNum = _currentRoom._roomNum;
// TODO: Make objects capable of stopping their own animations
GameObject *dragon = getObject(kDragonObject);
for (uint i = 0; i < dragon->_anims.size(); ++i) {
_vm->_anims->stop(dragon->_anims[i]);
}
for (uint i = 0; i < _info._numObjects; ++i) {
GameObject *obj = &_objects[i];
if (i != 0 && (obj->_location == oldRoomNum)) {
for (uint j = 0; j < obj->_anims.size(); ++j) {
_vm->_anims->deleteAnimation(obj->_anims[j]);
}
obj->_anims.clear();
}
}
_currentRoom._roomNum = roomNum;
loadRoom(roomNum);
loadOverlays();
}
void Game::runGateProgram(int gate) {
debugC(6, kDraciLogicDebugLevel, "Running program for gate %d", gate);
// Set the appropriate loop statu before executing the gate program
setLoopStatus(kStatusGate);
// Mark last animation
int lastAnimIndex = _vm->_anims->getLastIndex();
// Run gate program
_vm->_script->run(_currentRoom._program, _currentRoom._gates[gate]);
// Delete all animations loaded after the marked one
// (from objects and from the AnimationManager)
for (uint i = 0; i < getNumObjects(); ++i) {
GameObject *obj = &_objects[i];
for (uint j = 0; j < obj->_anims.size(); ++j) {
Animation *anim;
anim = _vm->_anims->getAnimation(obj->_anims[j]);
if (anim != NULL && anim->getIndex() > lastAnimIndex)
obj->_anims.remove_at(j);
}
}
_vm->_anims->deleteAfterIndex(lastAnimIndex);
setExitLoop(false);
}
int Game::getRoomNum() {
return _currentRoom._roomNum;
}
void Game::setRoomNum(int room) {
_newRoom = room;
}
int Game::getGateNum() {
return _currentGate;
}
void Game::setGateNum(int gate) {
_newGate = gate;
}
void Game::setLoopStatus(LoopStatus status) {
_loopStatus = status;
}
void Game::setLoopSubstatus(LoopStatus status) {
_loopSubstatus = status;
}
LoopStatus Game::getLoopStatus() {
return _loopStatus;
}
LoopStatus Game::getLoopSubstatus() {
return _loopSubstatus;
}
int Game::getVariable(int numVar) {
return _variables[numVar];
}
void Game::setVariable(int numVar, int value) {
_variables[numVar] = value;
}
int Game::getIconStatus(int iconID) {
return _iconStatus[iconID];
}
Person *Game::getPerson(int personID) {
return &_persons[personID];
}
void Game::setSpeechTick(uint tick) {
_speechTick = tick;
}
int Game::getEscRoom() {
return _currentRoom._escRoom;
}
/**
* The GPL command Mark sets the animation index (which specifies the order in which
* animations were loaded in) which is then used by the Release command to delete
* all animations that have an index greater than the one marked.
*/
int Game::getMarkedAnimationIndex() {
return _markedAnimationIndex;
}
/**
* See Game::getMarkedAnimationIndex().
*/
void Game::setMarkedAnimationIndex(int index) {
_markedAnimationIndex = index;
}
Game::~Game() {
delete[] _persons;
delete[] _variables;
delete[] _dialogOffsets;
delete[] _objects;
}
bool WalkingMap::isWalkable(int x, int y) {
// Convert to map pixels
x = x / _deltaX;
y = y / _deltaY;
int pixelIndex = _mapWidth * y + x;
int byteIndex = pixelIndex / 8;
int mapByte = _data[byteIndex];
return mapByte & (1 << pixelIndex % 8);
}
/**
* @brief For a given point, find a nearest walkable point on the walking map
*
* @param startX x coordinate of the point
* @param startY y coordinate of the point
*
* @return A Common::Point representing the nearest walkable point
*
* The algorithm was copied from the original engine for exactness.
* TODO: Study this algorithm in more detail so it can be documented properly and
* possibly improved / simplified.
*/
Common::Point WalkingMap::findNearestWalkable(int startX, int startY, Common::Rect searchRect) {
int signs[] = { 1, -1 };
const uint kSignsNum = 2;
int radius = 0;
int x, y;
int dx, dy;
int prediction;
// The place where, eventually, the result coordinates will be stored
int finalX, finalY;
// The algorithm appears to start off with an ellipse with the minor radius equal to
// zero and the major radius equal to the walking map delta (the number of pixels
// one map pixel represents). It then uses a heuristic to gradually reshape it into
// a circle (by shortening the major radius and lengthening the minor one). At each
// such resizing step, it checks some select points on the ellipse for walkability.
// It also does the same check for the ellipse perpendicular to it (rotated by 90 degrees).
while(1) {
// The default major radius
radius += _deltaX;
// The ellipse radii (minor, major) that get resized
x = 0;
y = radius;
// Heuristic variables
prediction = 1 - radius;
dx = 3;
dy = 2 * radius - 2;
do {
// The following two loops serve the purpose of checking the points on the two
// ellipses for walkability. The signs[] array is there to obliterate the need
// of writing out all combinations manually.
for (uint i = 0; i < kSignsNum; ++i) {
finalY = startY + y * signs[i];
for (uint j = 0; j < kSignsNum; ++j) {
finalX = startX + x * signs[j];
// If the current point is walkable, return it
if (searchRect.contains(finalX, finalY) && isWalkable(finalX, finalY)) {
return Common::Point(finalX, finalY);
}
}
}
for (uint i = 0; i < kSignsNum; ++i) {
finalY = startY + x * signs[i];
for (uint j = 0; j < kSignsNum; ++j) {
finalX = startX + y * signs[j];
// If the current point is walkable, return it
if (searchRect.contains(finalX, finalY) && isWalkable(finalX, finalY)) {
return Common::Point(finalX, finalY);
}
}
}
// If prediction is non-negative, we need to decrease the major radius of the
// ellipse
if (prediction >= 0) {
prediction -= dy;
dy -= 2 * _deltaX;
y -= _deltaX;
}
// Increase the minor radius of the ellipse and update heuristic variables
prediction += dx;
dx += 2 * _deltaX;
x += _deltaX;
// If the current ellipse has been reshaped into a circle,
// end this loop and enlarge the radius
} while (x <= y);
}
}
static double real_to_double(byte real[6]) {
// Extract sign bit
int sign = real[0] & (1 << 7);
// Extract exponent and adjust for bias
int exp = real[5] - 129;
double mantissa;
double tmp = 0.0;
if (real[5] == 0) {
mantissa = 0.0;
} else {
// Process the first four least significant bytes
for (int i = 4; i >= 1; --i) {
tmp += real[i];
tmp /= 1 << 8;
}
// Process the most significant byte (remove the sign bit)
tmp += real[0] & ((1 << 7) - 1);
tmp /= 1 << 8;
// Calculate mantissa
mantissa = 1.0;
mantissa += 2.0 * tmp;
}
// Flip sign if necessary
if (sign) {
mantissa = -mantissa;
}
// Calculate final value
return ldexp(mantissa, exp);
}
}
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