@synthesize spawnRate = _spawnRate;
@synthesize levelNum = _levelNum;
@synthesize enemyHP = _enemyHP;
@synthesize bgImageName = _bgImageName;

- (id)initWithLevelNum:(int)levelNum
            spawnRate:(float)spawnRate
            enemyHP:(int)enemyHP
            bgImageName:(NSString *)bgImageName {

    if ((self = [super init])) {
        self.levelNum = levelNum;
        self.spawnRate = spawnRate;
        self.enemyHP = enemyHP;
        self.bgImageName = bgImageName;
    }

    return self;

}
============


#import "SpaceManagerCocos2d.h"
#import "ParticleFactory.h"

@class GameLayer;

@interface Truck : cpCCSprite {

    GameLayer* _game;
    CCTexture2D* textureWheel;
    CCTexture2D* textureChassis;
    CCParticleSystemQuad* tFront;
    CCParticleSystemQuad* tMid;
    CCParticleSystemQuad* tRear;
    cpCCSprite* thrustSprite;
    cpConstraint* motor1;
    cpConstraint* motor2;
    float motorRateMultiplier;
    int thrustFactorX;
    int thrustFactorY;
    cpVect velocity;

}

@property(assign) cpCCNode* chassis;
@property(assign) cpShape* bodyShape;

-(id) initWithGame:(GameLayer*)game;
-(void) moveTruck:(float)joyPadXVel;
-(void) attemptBoost:(float)joyPadXVel : (float)joyPadYVel;
-(void) showThrustGraphic;
-(void) hideThrustGraphic;



@end

//.m


#import "Truck.h"
#import "GameLayer.h"

@interface Truck (Private)

-(void) buildTruckWithGame:(GameLayer*)game;

@end

@implementation Truck
@synthesize chassis;
@synthesize bodyShape;

-(id) initWithGame:(GameLayer*)game
{
    self = [super init];

    if (self != nil)
    {

        _game = game;

        textureWheel = [[[CCTexture2D alloc] initWithImage:[UIImage imageNamed:@"nWheel.png"]]autorelease];
        textureChassis = [[[CCTexture2D alloc] initWithImage:[UIImage imageNamed:@"chassis.png"]]autorelease];

        [self buildTruckWithGame:game];

        thrustFactorX=3000;
        thrustFactorY=4000;

    }

    return self;
}

-(void) buildTruckWithGame:(GameLayer*)game
{

    motorRateMultiplier = -10;

    float springStiffness = 2000.0;
    float springDamping = 25.0;
    float springRestLength = 35.0;

    float wheelFriction = 1.2;
    float wheelMass = 10;
    float wheelRad = 25;

#pragma mark CHASSIS

    bodyShape = [game.spaceManager addRectAt:cpv(100, 200) mass:50 width:100.0 height:50.0 rotation:0.0];

    chassis = [cpCCSprite spriteWithTexture:textureChassis];
    chassis.shape = bodyShape;
    chassis.spaceManager = game.spaceManager;
    chassis.autoFreeShapeAndBody = YES;
    [self addChild:chassis];