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+//
+//  GameLayer.m
+//  Cart Collect
+//
+//  Created by iD Student Account on 7/18/11.
+//  Copyright 2011 __MyCompanyName__. All rights reserved.
+//
+
+#import "GameLayer.h"
+
+
+@implementation GameLayer
+
++ (CCScene*)scene
+{
+        CCScene* scene = [CCScene node];
+        
+        CCLayerColor* backgroundLayer = [CCLayerColor layerWithColor:ccc4(255, 255, 255, 255)];
+        [scene addChild:backgroundLayer];
+        
+        GameLayer* layer = [GameLayer node];
+        [scene addChild:layer];
+        
+        scene.tag = 436;
+        
+        return scene;
+}
+
+- (void)tick:(ccTime)dt
+{
+        // Move the cart based on acceleration gathered from accelerometer
+        cartSprite.position = ccp(MIN(MAX(cartSprite.position.x+accelX, 16),464), cartSprite.position.y);
+        
+        int lastScore = score;
+        
+        for (FallingObject* object in objects)
+        {
+                // Move objects down
+                object.sprite.position = ccp(object.sprite.position.x, object.sprite.position.y-object.weight);
+        
+        // Cart collision detection
+        CGSize first = [cartSprite boundingBox].size;
+        CGSize second = [object.sprite boundingBox].size;
+        
+        if (cartSprite.position.x > (object.sprite.position.x - second.width/2 - first.width/2))
+        {
+            if (cartSprite.position.x < (object.sprite.position.x + second.width/2 + first.width/2))
+            {
+                if (cartSprite.position.y > (object.sprite.position.y - second.height/2 - first.height/2))
+                {
+                    if (cartSprite.position.y < (object.sprite.position.y + second.height/2 + first.height/2))
+                    {
+                        [object retain];
+                        [objects removeObject:object];
+                        
+                        // If a cart collides with an object, it's going to vanish no matter what
+                        [object.sprite.parent removeChild:object.sprite cleanup:YES];
+                        
+                        NSString* audioFile = nil;
+                        if ([object isKindOfClass:[OneUp class]])
+                        {
+                            audioFile = [[NSBundle mainBundle] pathForResource:@"1up" ofType:@"wav"];
+                            lives++;
+                        } else if ([object isKindOfClass:[Rock class]])
+                        {
+                            audioFile = [[NSBundle mainBundle] pathForResource:@"Damage1" ofType:@"wav"];
+                            lives--;
+                        } else if ([object conformsToProtocol:@protocol(ValuableObject)]) {
+                            audioFile = [[NSBundle mainBundle] pathForResource:@"Item1" ofType:@"wav"];
+                            score += [((FallingObject<ValuableObject>*)object) pointValue];
+                        }
+                        
+                        if (audioFile != nil)
+                        {
+                            [[SimpleAudioEngine sharedEngine] playEffect:audioFile];
+                        }
+                        
+                        [self updateLabels];
+                        
+                        continue; // Don't check for collision with floor
+                    }
+                }
+            }
+        }
+        
+                // Collision detection with floor
+        if (object.sprite.position.y - (object.sprite.contentSize.height/2) < 0)
+                {
+            [object retain];
+            [objects removeObject:object];
+            
+                        [object.sprite.parent removeChild:object.sprite cleanup:YES];
+                        
+                        if ([object conformsToProtocol:@protocol(ValuableObject)])
+                        {
+                                NSString* audioFile = [[NSBundle mainBundle] pathForResource:@"Damage1" ofType:@"wav"];
+                [[SimpleAudioEngine sharedEngine] playEffect:audioFile];
+                                
+                                lives--;
+                                
+                                [self updateLabels];
+                        }
+                }       
+        }
+        
+        if (lives == 0)
+        {
+        [self unschedule:@selector(randomlyAddObject:)];
+        [self unschedule:@selector(tick:)];
+        [[CCDirector sharedDirector] replaceScene:[CCTransitionSlideInT transitionWithDuration:1.5f scene:[GameOverLayer sceneWithScore:score]]];
+        } else if (score > lastScore)
+        {
+                if ((lastScore < 6500) && (score >= 6500))
+                {
+                        [self unschedule:@selector(randomlyAddObject:)];
+                        [self schedule:@selector(randomlyAddObject:) interval:0.6f];
+                        addSpeed = 0.6f;
+                } else if ((lastScore < 4500) && (score >= 4500))
+                {
+                        [self unschedule:@selector(randomlyAddObject:)];
+                        [self schedule:@selector(randomlyAddObject:) interval:0.7f];
+                        addSpeed = 0.7f;
+                } else if ((lastScore < 2500) && (score >= 2500))
+                {
+                        [self unschedule:@selector(randomlyAddObject:)];
+                        [self schedule:@selector(randomlyAddObject:) interval:0.8f];
+                        addSpeed = 0.8f;
+                } else if ((lastScore < 1500) && (score >= 1500))
+                {
+                        [self unschedule:@selector(randomlyAddObject:)];
+                        [self schedule:@selector(randomlyAddObject:) interval:0.9f];
+                        addSpeed = 0.9f;
+                } else if ((lastScore < 500) && (score >= 500))
+                {
+                        [self unschedule:@selector(randomlyAddObject:)];
+                        [self schedule:@selector(randomlyAddObject:) interval:1.0f];
+                        addSpeed = 1.0f;
+                } else if ((lastScore < 150) && (score >= 150))
+                {
+                        [self unschedule:@selector(randomlyAddObject:)];
+                        [self schedule:@selector(randomlyAddObject:) interval:2.0f];
+                        addSpeed = 2.0f;
+                }
+        }
+}
+
+- (void)randomlyAddObject:(ccTime)dt
+{
+        FallingObject* object;
+    int oneuppercent = 98 - (lives == 1 ? 1 : 0);
+
+        if (score < 1000)
+        {
+                int randomval = arc4random()%100;
+                
+                if (randomval < 65)
+                {
+                        object = [[Cherry alloc] init];
+                } else if (randomval < oneuppercent)
+                {
+                        object = [[Bottle alloc] init];
+                } else {
+                        object = [[OneUp alloc] init];
+                }
+        } else {
+                int randomval = arc4random()%100;
+                
+                if (randomval < 40)
+                {
+                        object = [[Cherry alloc] init];
+                } else if (randomval < 70)
+                {
+                        object = [[Rock alloc] init];
+                } else if (randomval < oneuppercent)
+                {
+                        object = [[Bottle alloc] init];
+                } else {
+                        object = [[OneUp alloc] init];
+                }
+        }
+        
+        int objectX = arc4random()%448+16;
+        object.sprite.position = ccp(objectX, 360);
+        object.sprite.scale = 1;
+        [self addChild:object.sprite];
+        
+        [objects addObject:object];
+    [object release];
+        
+        if (score >= 2000)
+        {
+                if (arc4random() % 100 > 80)
+                {
+                        object = [[Rock alloc] init];
+                        
+                        objectX = arc4random()%448+16;
+                        object.sprite.position = ccp(objectX, 360);
+                        object.sprite.scale = 1;
+                        [self addChild:object.sprite];
+                        
+                        [objects addObject:object];
+            [object release];
+                }
+        }
+        
+        if (score >= 4000)
+        {
+                if (arc4random() % 100 > 80)
+                {
+                        object = [[Rock alloc] init];
+                        
+                        objectX = arc4random()%448+16;
+                        object.sprite.position = ccp(objectX, 360);
+                        object.sprite.scale = 1;
+                        [self addChild:object.sprite];
+                        
+                        [objects addObject:object];
+            [object release];
+                }
+        }
+}
+
+- (id)init
+{
+        self = [super init];
+        
+        int winWidth = [CCDirector sharedDirector].winSize.width;
+        //int winHeight = [CCDirector sharedDirector].winSize.height;
+        int cartScale = 2;
+        
+        if (self != nil)
+        {
+                CCSprite* backgroundImage = [CCSprite spriteWithFile:@"SeaBeach.png"];
+                backgroundImage.position = ccp(240, 160);
+                [self addChild:backgroundImage z:0];
+                
+                isAccelerometerEnabled_ = YES;
+                
+                //cart = [[Cart alloc] init];
+        cartSprite = [CCSprite spriteWithFile:@"cart.png"];
+                cartSprite.position = ccp(winWidth/2, 22);
+                cartSprite.scale = cartScale;
+                [self addChild:cartSprite];
+                
+                objects = [[NSMutableSet alloc] init];
+                
+                score = 0;
+                lives = 3;
+                
+                scoreLabel = [CCLabelBMFont labelWithString:@"Score: 0" fntFile:@"helvetica2.fnt"];
+                scoreLabel.position = ccp(50, 300);
+                [self addChild:scoreLabel];
+                
+                livesLabel = [CCLabelBMFont labelWithString:@"Lives: 3" fntFile:@"helvetica2.fnt"];
+                livesLabel.position = ccp(50, 280);
+                [self addChild:livesLabel];
+                
+                CCMenuItemImage* pauseButton = [CCMenuItemImage itemFromNormalImage:@"pause2.png" selectedImage:@"pause.png" target:self selector:@selector(pause)];
+                CCMenu* pauseMenu = [CCMenu menuWithItems:pauseButton, nil];
+                [pauseMenu setPosition:ccp(480-8-16, 320-8-16)];
+                [self addChild:pauseMenu];
+                
+                addSpeed = 2.5f;
+        }
+        
+        return self;
+}
+
+-(void) onEnter
+{
+        [super onEnter];
+        
+        [[UIAccelerometer sharedAccelerometer] setUpdateInterval:(1.0 / 60)];
+        [self schedule:@selector(tick:) interval:1.0f/60.0f];
+        [self schedule:@selector(randomlyAddObject:) interval:addSpeed];
+}
+
+- (void)accelerometer:(UIAccelerometer*)accelerometer didAccelerate:(UIAcceleration*)acceleration
+{       
+        static float prevY=0;
+        
+#define kFilterFactor 0.05f
+        
+        float accelY = -((float) acceleration.y * kFilterFactor + (1- kFilterFactor)*prevY);
+        
+        prevY = accelY;
+        accelX = accelY * 750;
+}
+
+- (void)updateLabels
+{
+        [scoreLabel setString:[NSString stringWithFormat:@"Score: %d", score]];
+        [livesLabel setString:[NSString stringWithFormat:@"Lives: %d", lives]];
+}
+
+- (void)pause
+{
+        [[CCDirector sharedDirector] replaceScene:[PauseLayer sceneWithScene:[[CCDirector sharedDirector] runningScene]]];
+}
+
+@end