Player.cpp
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	/****************************************************************************
	** Copyright (C) 2011 Luka Horvat <redreaper132 at gmail.com>
	** Copyright (C) 2011 Edward Lii <edward_iii at myway.com>
	** Copyright (C) 2011 O. Bahri Gordebak <gordebak at gmail.com>
	**
	**
	** 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.
	**
	** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
	** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	**
	** 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 "Player.h"
	#include "Game.h"
	#include "Functions.h"
	#include "FileManager.h"
	#include "Globals.h"
	#include "Objects.h"
	#include <iostream>
	#include <SDL/SDL_mixer.h>
	#include <SDL/SDL.h>
	#include <SDL/SDL_ttf.h>
	using namespace std;

	Player::Player(Game* objParent):xVelBase(0),yVelBase(0),objParent(objParent){
	//Set the dimensions of the player.
	//The size of the player is 21x40.
	box.x=0;
	box.y=0;
	box.w=21;
	box.h=40;

	//Set his velocity to zero.
	xVel=0;
	yVel=0;

	//Set the start position.
	fx=0;
	fy=0;

	//Check if sound is enabled.
	if(getSettings()->getBoolValue("sound")==true){
	//It is so load the sounds.
	jumpSound=Mix_LoadWAV((getDataPath()+"sfx/jump.wav").c_str());
	hitSound=Mix_LoadWAV((getDataPath()+"sfx/hit.wav").c_str());
	saveSound=Mix_LoadWAV((getDataPath()+"sfx/checkpoint.wav").c_str());
	swapSound=Mix_LoadWAV((getDataPath()+"sfx/swap.wav").c_str());
	toggleSound=Mix_LoadWAV((getDataPath()+"sfx/toggle.wav").c_str());
	}

	//Set some default values.
	inAir=true;
	isJump=false;
	onGround=true;
	shadowCall=false;
	shadow=false;
	canMove=true;
	holdingOther=false;
	dead=false;
	record=false;

	//Some default values for animation variables.
	frame=0;
	animation=0;
	direction=0;
	jumpTime=0;

	state=0;

	//xVelSaved is used to store if there's a state saved or not.
	xVelSaved=0x80000000;
	}

	Player::~Player(){
	//We only need to clean up the sounds if they were loaded.
	if(getSettings()->getBoolValue("sound")==true){
	Mix_FreeChunk(jumpSound);
	Mix_FreeChunk(hitSound);
	Mix_FreeChunk(saveSound);
	Mix_FreeChunk(swapSound);
	Mix_FreeChunk(toggleSound);
	}
	}

	void Player::handleInput(class Shadow* shadow){
	//Get the current keystate.
	Uint8* keyState=SDL_GetKeyState(NULL);

	//Reset horizontal velocity.
	xVel=0;
	if(keyState[SDLK_RIGHT]){
	//Walking to the right.
	xVel+=7;
	}
	if(keyState[SDLK_LEFT]){
	//Walking to the left.
	xVel-=7;
	}

	//Check if a key has been released.
	if(event.type==SDL_KEYUP){
	//It has so downKeyPressed can't be true.
	downKeyPressed=false;
	}

	//Check if a key is pressed (down).
	if(event.type==SDL_KEYDOWN){
	//Switch which key is pressed.
	switch(event.key.keysym.sym){
	case SDLK_UP:
	//The up key, if we aren't in the air we start jumping.
	if(inAir==false){
	isJump=true;
	}
	break;
	case SDLK_SPACE:
	//Start recording or stop, depending on the recording state.
	if(record==false){
	//We start recording.
	if(shadow->called==true){
	//The shadow is still busy so first stop him before we can start recording.
	shadowCall=false;
	shadow->called=false;
	shadow->playerButton.clear();
	}else if(!dead){
	//The shadow isn't moving and we aren't dead so start recording.
	record=true;
	}
	}else{
	//The player is recording so stop recording and call the shadow.
	record=false;
	shadowCall=true;
	}
	break;
	case SDLK_DOWN:
	//Downkey is pressed.
	downKeyPressed=true;
	break;
	case SDLK_F2:
	//F2 only works in the level editor.
	if(!(dead \|\| shadow->dead) && stateID==STATE_LEVEL_EDITOR){
	//Save the state.
	if(objParent)
	objParent->saveState();
	}
	break;
	case SDLK_F3:
	//F3 is used to load the last state.
	if(objParent)
	objParent->loadState();
	break;
	case SDLK_F4:
	//F4 will swap the player and the shadow, but only in the level editor.
	if(!(dead \|\| shadow->dead) && stateID==STATE_LEVEL_EDITOR){
	swapState(shadow);
	}
	break;
	case SDLK_F12:
	//F12 is suicide and only works in the leveleditor.
	if(stateID==STATE_LEVEL_EDITOR){
	die();
	shadow->die();
	}
	default:
	break;
	}
	}

	}

	void Player::setPosition(int x,int y){
	box.x=x;
	box.y=y;
	}

	void Player::move(vector<GameObject*> &levelObjects){
	//Pointer to a checkpoint.
	GameObject* objCheckPoint=NULL;
	//Pointer to a swap.
	GameObject* objSwap=NULL;

	//Boolean if the player can teleport.
	bool canTeleport=true;

	//Set the object the player is currently standing to NULL.
	objCurrentStand=NULL;

	//Check if the player is still alive.
	if(dead==false){
	//Add gravity
	if(inAir==true){
	yVel+=1;

	//Cap fall speed to 13.
	if(yVel>13){
	yVel=13;
	}
	}

	//Check if the player can move.
	if(canMove==true){
	//Check if the player is moving or not.
	if(xVel>0){
	direction=0;
	onGround=false;
	}else if(xVel<0){
	direction=1;
	onGround=false;
	}else if(xVel==0){
	onGround=true;
	}
	//Move the player.
	box.x+=xVel;

	//Loop through the levelobjects.
	for(unsigned int o=0; o<levelObjects.size(); o++){
	//Check if the player can walk on the object.
	if(levelObjects[o]->queryProperties(GameObjectProperty_PlayerCanWalkOn,this)){
	//Get the collision box of the levelobject.
	SDL_Rect r=levelObjects[o]->getBox();

	//Check collision with the player.
	if(checkCollision(box,r)){
	//We have collision, get the velocity of the box.
	SDL_Rect v=levelObjects[o]->getBox(BoxType_Delta);

	//Check on which side of the box the player is.
	if(box.x + box.w/2 <= r.x + r.w/2){
	if(xVel+xVelBase>v.x){
	if(box.x>r.x-box.w)
	box.x=r.x-box.w;
	}
	}else{
	if(xVel+xVelBase<v.x){
	if(box.x<r.x+r.w)
	box.x=r.x+r.w;
	}
	}
	}
	}
	}
	}

	//Now apply the yVel. (gravity, jumping, etc..)
	box.y+=yVel;

	//Pointer to the object the player standed on.
	GameObject* lastStand=NULL;

	//???
	inAir=true;
	canMove=true;

	//Loop through all the levelObjects.
	for(unsigned int o=0; o<levelObjects.size(); o++){
	//Check if the object is solid.
	if(levelObjects[o]->queryProperties(GameObjectProperty_PlayerCanWalkOn,this)){
	SDL_Rect r=levelObjects[o]->getBox();
	if(checkCollision(r,box)==true){ //TODO:fix some bug
	SDL_Rect v=levelObjects[o]->getBox(BoxType_Delta);

	if(box.y+box.h/2<=r.y+r.h/2){
	if(yVel>=v.y \|\| yVel>=0){
	inAir=false;
	box.y=r.y-box.h;
	yVel=1; //???
	lastStand=levelObjects[o];
	lastStand->onEvent(GameObjectEvent_PlayerIsOn);
	}
	}else{
	if(yVel<=v.y+1){
	yVel=v.y>0?v.y:0;
	if(box.y<r.y+r.h)
	box.y=r.y+r.h;
	}
	}
	}
	}

	//Check if the object is a checkpoint.
	if(levelObjects[o]->type==TYPE_CHECKPOINT && checkCollision(box,levelObjects[o]->getBox())){
	//If we're not the shadow set the gameTip to Checkpoint.
	if(!shadow && objParent!=NULL)
	objParent->gameTipIndex=TYPE_CHECKPOINT;

	//And let objCheckPoint point to this object.
	objCheckPoint=levelObjects[o];
	}

	//Check if the object is a swap.
	if(levelObjects[o]->type==TYPE_SWAP && checkCollision(box,levelObjects[o]->getBox())){
	//If we're not the shadow set the gameTip to swap.
	if(!shadow && objParent!=NULL)
	objParent->gameTipIndex=TYPE_SWAP;

	//And let objSwap point to this object.
	objSwap=levelObjects[o];
	}

	//Check if the object is an exit.
	//This doesn't work if the state is Level editor.
	if(levelObjects[o]->type==TYPE_EXIT && stateID!=STATE_LEVEL_EDITOR && checkCollision(box,levelObjects[o]->getBox())){
	//Goto the next level.
	levels.nextLevel();

	//Check if the level exists.
	if(levels.getLevel()<levels.getLevelCount()){
	//It does so unlock the levels.
	levels.setLocked(levels.getLevel());
	//And enter the GameState to start the new level.
	setNextState(STATE_GAME);
	}else{
	//Show the congratulations messagebox.
	if(!levels.congratulationText.empty()){
	msgBox(levels.congratulationText,MsgBoxOKOnly,"Congratulations");
	}else{
	msgBox("You have finished the levelpack!",MsgBoxOKOnly,"Congratulations");
	}

	//Go to the level select menu.
	setNextState(STATE_LEVEL_SELECT);
	}
	}

	//Check if the object is a portal.
	if(levelObjects[o]->type==TYPE_PORTAL && checkCollision(box,levelObjects[o]->getBox())){
	//Check if the teleport id isn't empty.
	if((dynamic_cast<Block*>(levelObjects[o]))->id.empty()){
	cerr<<"Warning: Invalid teleport id!"<<endl;
	canTeleport=false;
	}

	//If we're not the shadow set the gameTip to portal.
	if(!shadow && objParent!=NULL)
	objParent->gameTipIndex=TYPE_PORTAL;

	//Check if we can teleport and should (downkey -or- auto).
	if(canTeleport && (downKeyPressed \|\| (levelObjects[o]->queryProperties(GameObjectProperty_Flags,this)&1))){
	canTeleport=false;
	if(downKeyPressed \|\| levelObjects[o]!=objLastTeleport){
	downKeyPressed=false;

	//Loop the levelobjects again to find the destination.
	for(unsigned int oo=o+1;;){
	//We started at our index+1.
	//Meaning that if we reach the end of the vector then we need to start at the beginning.
	if(oo>=levelObjects.size())
	oo-=(int)levelObjects.size();
	//It also means that if we reach the same index we need to stop.
	if(oo==o)
	break;

	//Check if the second (oo) object is a portal.
	if(levelObjects[oo]->type==TYPE_PORTAL){
	//Check the id against the destination of the first portal.
	if((dynamic_cast<Block>(levelObjects[o]))->destination==(dynamic_cast<Block>(levelObjects[oo]))->id){
	//Call the event.
	levelObjects[o]->onEvent(GameObjectEvent_OnToggle);
	objLastTeleport=levelObjects[oo];

	//Get the destination location and teleport the player.
	SDL_Rect r=levelObjects[oo]->getBox();
	box.x=r.x+5;
	box.y=r.y+2;

	//Check if music/sound is enabled.
	if(getSettings()->getBoolValue("sound")){
	Mix_PlayChannel(-1,swapSound,0);
	}
	break;
	}
	}

	//Increase oo.
	oo++;
	}
	}
	}
	}

	//Check if the object is a switch.
	if(levelObjects[o]->type==TYPE_SWITCH && checkCollision(box,levelObjects[o]->getBox())){
	//If we're not the shadow set the gameTip to switch.
	if(!shadow && objParent!=NULL)
	objParent->gameTipIndex=TYPE_SWITCH;

	//If the down key is pressed then invoke an event.
	if(downKeyPressed){
	//Play the animation.
	levelObjects[o]->playAnimation(1);

	//Check if sound is enabled, if so play the toggle sound.
	if(getSettings()->getBoolValue("sound")==true){
	Mix_PlayChannel(-1,toggleSound,0);
	}

	if(objParent!=NULL){
	//Make sure that the id isn't emtpy.
	if(!(dynamic_cast<Block*>(levelObjects[o]))->id.empty()){
	objParent->broadcastObjectEvent(0x10000 \| (levelObjects[o]->queryProperties(GameObjectProperty_Flags,this)&3),
	-1,(dynamic_cast<Block*>(levelObjects[o]))->id.c_str());
	}else{
	cerr<<"Warning: invalid switch id!"<<endl;
	}
	}
	}
	}

	//Check if the object is a notification block.
	if(levelObjects[o]->type==TYPE_NOTIFICATION_BLOCK && checkCollision(box,levelObjects[o]->getBox())){
	//If we're not the shadow set the gameTip to notification block.
	if(!shadow && objParent!=NULL)
	objParent->gameTipIndex=TYPE_NOTIFICATION_BLOCK;

	//If the down key is pressed then invoke an event.
	if(downKeyPressed==true)
	(dynamic_cast<Block*>(levelObjects[o]))->onEvent(GameObjectEvent_OnSwitchOn);
	}

	//Check if the object is deadly.
	if(levelObjects[o]->queryProperties(GameObjectProperty_IsSpikes,this)){
	//It is so get the collision box.
	SDL_Rect r=levelObjects[o]->getBox();

	//TODO: pixel-accuracy hit test.
	//For now we shrink the box.
	r.x+=2;
	r.y+=2;
	r.w-=4;
	r.h-=4;

	//Check collision, if the player collides then let him die.
	if(checkCollision(box,r))
	die();
	}
	}

	//Check if the player fell of the level.
	if(box.y>LEVEL_HEIGHT)
	die();

	//Check if the player changed blocks, meaning stepped onto a block.
	objCurrentStand=lastStand;
	if(lastStand!=objLastStand){
	objLastStand=lastStand;
	if(lastStand){
	//Call the walk on event of the laststand.
	lastStand->onEvent(GameObjectEvent_PlayerWalkOn);

	//Bugfix for Fragile blocks.
	if(lastStand->type==TYPE_FRAGILE && !lastStand->queryProperties(GameObjectProperty_PlayerCanWalkOn,this)){
	inAir=true;
	onGround=false;
	isJump=false;
	}
	}
	}

	//Check if the player can teleport.
	if(canTeleport)
	objLastTeleport=NULL;

	//Check the checkpoint pointer only if the downkey is pressed.
	if(objParent!=NULL && downKeyPressed && objCheckPoint!=NULL){
	//Checkpoint thus save the state.
	if(objParent->saveState())
	objParent->objLastCheckPoint=objCheckPoint;
	}
	//Check the swap pointer only if the down key is pressed.
	if(objSwap!=NULL && downKeyPressed && objParent!=NULL){
	if(shadow){
	if(!(dead \|\| objParent->player.dead)){
	objParent->player.swapState(this);
	objSwap->playAnimation(1);
	}
	}else{
	if(!(dead \|\| objParent->shadow.dead)){
	swapState(&objParent->shadow);
	objSwap->playAnimation(1);
	}
	}
	}
	}

	//Finally we reset some stuff.
	downKeyPressed=false;
	xVelBase=0;
	yVelBase=0;
	}


	void Player::jump(){
	//Check if the player is dead or not.
	if(dead==true){
	//The player can't jump if he's dead.
	isJump=false;
	}

	//Check if the player can jump.
	if(isJump==true && inAir==false){
	//Set the jump velocity.
	yVel=-13;
	inAir=true;
	isJump=false;
	jumpTime++;

	//Check if sound is enabled, if so play the jump sound.
	if(getSettings()->getBoolValue("sound")==true){
	Mix_PlayChannel(-1,jumpSound,0);
	}
	}
	}

	void Player::show(){
	//Check if we should render the recorded line.
	//Only do this when we're recording and we're not the shadow.
	if(shadow==false && record==true){
	//FIXME: Adding an entry not in update but in render?
	line.push_back(SDL_Rect());
	line[line.size()-1].x=box.x+11;
	line[line.size()-1].y=box.y+20;

	//Loop through the line dots and draw them.
	for(int l=0; l<(signed)line.size(); l++){
	appearance.drawState("line",screen,line[l].x-camera.x,line[l].y-camera.y,NULL);
	}
	}

	//Make sure the player is still alive.
	if(dead==false){
	//Update the frame.
	frame++;
	if(frame>=5){
	//Frame is higher or equal to five thus increase animation.
	animation++;
	if(animation>=2){
	//Animation is two or higher but there are only two frames.
	//So we set it to the first frame.
	animation=0;
	}

	//And reset frame.
	frame=0;
	}

	//Check if the player is in the air.
	if(inAir==false){
	//Check which direction.
	if(direction==0){
	//Check if onGround is true or not.
	if(onGround==false){
	//It isn't so the player is walking.
	char state[64];
	sprintf(state,"%s%d","walkright",animation);
	appearance.drawState(state, screen, box.x-camera.x, box.y-camera.y, NULL);
	}else{
	//Check if the player is holding the other.
	if(holdingOther==true){
	appearance.drawState("holding", screen, box.x-camera.x, box.y-camera.y, NULL);
	}else{
	//Not walking and nothing holding the other thus standing still.
	appearance.drawState("standright", screen, box.x-camera.x, box.y-camera.y, NULL);
	}
	}
	}else if(direction==1){
	//Check if onGround is true or not.
	if(onGround==false){
	//It isn't so the player is walking.
	char state[64];
	sprintf(state,"%s%d","walkleft",animation);
	appearance.drawState(state, screen, box.x-camera.x, box.y-camera.y, NULL);
	}else{
	//Check if the player is holding the other.
	if(holdingOther==true){
	appearance.drawState("holding", screen, box.x-camera.x, box.y-camera.y, NULL);
	}else {
	//Not walking and nothing holding the other thus standing still.
	appearance.drawState("standleft", screen, box.x-camera.x, box.y-camera.y, NULL);
	}
	}
	}
	}else{
	//The player is in the air so check which direction.
	if(direction==0){
	//We're going right.
	appearance.drawState("jumpright", screen, box.x-camera.x, box.y-camera.y, NULL);
	}
	if(direction==1){
	//Left.
	appearance.drawState("jumpleft", screen, box.x-camera.x, box.y-camera.y, NULL);
	}
	}
	}

	}

	void Player::shadowSetState(){
	//Only add an entry if the player is recording.
	if(record){
	int currentKey=0;

	//Check for xvelocity.
	if(xVel>0)
	currentKey\|=PlayerButtonRight;
	if(xVel<0)
	currentKey\|=PlayerButtonLeft;

	//Check for jumping.
	if(isJump)
	currentKey\|=PlayerButtonJump;

	//Check if the downbutton is pressed.
	if(downKeyPressed)
	currentKey\|=PlayerButtonDown;

	//Add the action.
	playerButton.push_back(currentKey);

	//Change the state.
	state++;
	}
	}

	void Player::shadowGiveState(Shadow* shadow){
	//Check if the player calls the shadow.
	if(shadowCall==true){
	//Clear any recording still with the shadow.
	shadow->playerButton.clear();

	//Loop the recorded moves and add them to the one of the shadow.
	for(unsigned int s=0;s<playerButton.size();s++){
	shadow->playerButton.push_back(playerButton[s]);
	}

	//Reset the state of both the player and the shadow.
	stateReset();
	shadow->stateReset();

	//Clear the recording at the player's side.
	playerButton.clear();
	line.clear();

	//Set shadowCall false
	shadowCall=false;
	//And let the shadow know that the player called him.
	shadow->meCall();
	}
	}

	void Player::stateReset(){
	//Reset the state by setting it to 0.
	state=0;
	}

	void Player::otherCheck(class Player* other){
	//Check if the player is standing on the shadow, or vice versa.
	//First make sure the player isn't dead.
	if(!dead){
	if(objCurrentStand!=NULL){
	//Now get the velocity of the object the player is standing.
	SDL_Rect v=objCurrentStand->getBox(BoxType_Velocity);

	//Set the base velocity to the velocity of the object.
	xVelBase=v.x;
	yVelBase=v.y;

	//Already move the player box.
	box.x+=v.x;
	box.y+=v.y;
	}

	//Make sure the other isn't dead.
	if(!other->dead){
	//Get the box of the shadow.
	SDL_Rect boxShadow=other->getBox();

	//Check collision between the shadow and the player.
	if(checkCollision(box,boxShadow)==true){
	//We have collision now check if the other is standing on top of you.
	if(box.y+box.h<=boxShadow.y+13 && !other->inAir){
	int yVelocity=yVel-1;
	if(yVelocity>0){
	box.y-=yVel;
	box.y+=boxShadow.y-(box.y+box.h);
	inAir=false;
	canMove=false;
	onGround=true;
	other->holdingOther=true;
	}
	}
	}else{
	other->holdingOther=false;
	}
	}
	}
	objCurrentStand=NULL;
	}

	SDL_Rect Player::getBox(){
	return box;
	}

	void Player::setMyCamera(){
	//Only change the camera when the player isn't dead.
	if(dead)
	return;

	//TODO: Perhaps make it possible to center the camera on the shadow by pressing a key.
	//Shift maybe?

	//Check if the player is halfway pass the halfright of the screen.
	if(box.x>camera.x+450){
	//It is so ease the camera to the right.
	camera.x+=(box.x-camera.x-400)>>4;

	//Check if the camera isn't going too far.
	if(box.x<camera.x+450){
	camera.x=box.x-450;
	}
	}

	//Check if the player is halfway pass the halfleft of the screen.
	if(box.x<camera.x+350){
	//It is so ease the camera to the left.
	camera.x+=(box.x-camera.x-400)>>4;

	//Check if the camera isn't going too far.
	if(box.x>camera.x+350){
	camera.x=box.x-350;
	}
	}

	//If the camera is too far to the left we set it to 0.
	if(camera.x<0){
	camera.x=0;
	}
	//If the camera is too far to the right we set it to the max right.
	if(camera.x+camera.w>LEVEL_WIDTH){
	camera.x=LEVEL_WIDTH-camera.w;
	}

	//Check if the player is halfway pass the lower half of the screen.
	if(box.y>camera.y+350){
	//Ir is so ease the camera down.
	camera.y+=(box.y-camera.y-300)>>4;

	//Check if the camera isn't going too far.
	if(box.y<camera.y+350){
	camera.y=box.y-350;
	}
	}

	//Check if the player is halfway pass the upper half of the screen.
	if(box.y<camera.y+250){
	//It is so ease the camera up.
	camera.y+=(box.y-camera.y-300)>>4;

	//Check if the camera isn't going too far.
	if(box.y>camera.y+250){
	camera.y=box.y-250;
	}
	}

	//If the camera is too far up we set it to 0.
	if(camera.y<0){
	camera.y=0;
	}
	//If the camera is too far down we set it to the max down.
	if(camera.y+camera.h>LEVEL_HEIGHT){
	camera.y=LEVEL_HEIGHT-camera.h;
	}
	}

	void Player::reset(){
	//Set the location of the player to it's initial state.
	box.x=fx;
	box.y=fy;

	//Reset back to default value.
	inAir=true;
	isJump=false;
	onGround=true;
	shadowCall=false;
	canMove=true;
	holdingOther=false;
	dead=false;
	record=false;

	//Some animation variables.
	frame=0;
	animation=0;
	direction=0;

	state=0;
	yVel=0;

	objCurrentStand=NULL;

	//Clear the recording.
	line.clear();
	playerButton.clear();

	//xVelSaved is used to indicate if there's a state saved or not.
	xVelSaved=0x80000000;
	}

	void Player::saveState(){
	//We can only save the state when the player isn't dead.
	if(!dead){
	boxSaved.x=box.x;
	boxSaved.y=box.y;
	xVelSaved=xVel;
	yVelSaved=yVel;
	inAirSaved=inAir;
	isJumpSaved=isJump;
	onGroundSaved=onGround;
	canMoveSaved=canMove;
	holdingOtherSaved=holdingOther;

	//Only play the sound when it's enabled.
	if(getSettings()->getBoolValue("sound")==true){
	//To prevent playing the sound twice, only the player can cause the sound.
	if(!shadow)
	Mix_PlayChannel(-1,saveSound,0);
	}
	}
	}

	void Player::loadState(){
	//Check with xVelSaved if there's a saved state.
	if(xVelSaved==0x80000000){
	//There isn't so reset the game to load the first initial state.
	reset();
	return;
	}

	//Restore the saved values.
	box.x=boxSaved.x;
	box.y=boxSaved.y;
	//xVel is set to 0 since it's saved counterpart is used to indicate a saved state.
	xVel=0;
	yVel=yVelSaved;

	//Restore teh saved values.
	inAir=inAirSaved;
	isJump=isJumpSaved;
	onGround=onGroundSaved;
	canMove=canMoveSaved;
	holdingOther=holdingOtherSaved;
	dead=false;
	record=false;
	shadowCall=false;
	stateReset();

	//Clear any recorded stuff.
	line.clear();
	playerButton.clear();
	}

	void Player::swapState(Player* other){
	//We need to swap the values of the player with the ones of the given player.
	swap(box.x,other->box.x);
	swap(box.y,other->box.y);
	//NOTE: xVel isn't there since it's used for something else.
	swap(yVel,other->yVel);
	swap(inAir,other->inAir);
	swap(isJump,other->isJump);
	swap(onGround,other->onGround);
	swap(canMove,other->canMove);
	swap(holdingOther,other->holdingOther);
	swap(dead,other->dead);
	record=false;
	shadowCall=false;
	stateReset();

	//Now remove the current line and the player buttons.
	//FIXME: Is this needed, couldn't it be used for complicated puzzles?
	line.clear();
	playerButton.clear();

	//Also reset the state of the other.
	other->stateReset();

	//Play the swap sound.
	if(getSettings()->getBoolValue("sound")==true){
	Mix_PlayChannel(-1,swapSound,0);
	}
	}

	bool Player::canSaveState(){
	//We can only save the state if the player isn't dead.
	return !dead;
	}

	bool Player::canLoadState(){
	//We use xVelSaved to indicate if a state is saved or not.
	return xVelSaved != 0x80000000;
	}

	void Player::die(){
	//Make sure the player isn't already dead.
	if(!dead){
	dead=true;
	//If sound is enabled run the hit sound.
	if(getSettings()->getBoolValue("sound")==true){
	Mix_PlayChannel(-1,hitSound,0);
	}
	}
	}

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