第一次用2cocosd编写一个小游戏——DoodleDrop

来源：互联网发布：最大公约数 c语言编辑：程序博客网时间：2024/06/03 18:24

源代码：

// GameScene.h

// DoodleDrop

// Created by apple on 13-3-14.

#import <Foundation/Foundation.h>

#import "cocos2d.h"

@interface GameScene : CCLayer

{

CCSprite* player;

CGPoint playerVelocity;

// 添加障碍物

CCArray* spiders;

float spiderMoveDuration;

int numSpidersMoved;

// 标签

CCLabelTTF* scoreLabel;

ccTime totalTime;

int score;

}

+(id) scene;

@end

// GameScene.m

// DoodleDrop

// Created by apple on 13-3-14.

#import "GameScene.h"

@implementation GameScene

+(id) scene

{

CCScene* scene = [ CCScenenode ];

CCLayer* layer = [ GameScenenode ];

[ scene addChild: layer ];

return scene;

}

// resetSpiders 方法

- (void) resetSpiders

{

CGSize screenSize = [ [ CCDirector sharedDirector ] winSize ];

// get any spider to get its image width

CCSprite* tempSpider = [ spiders lastObject ];

CGSize size = [ tempSpider texture ].contentSize;

int numSpiders = [ spiderscount ];

for ( int i = 0 ; i < numSpiders ; i++ )

{

// put each spider at its designated position outside the screen

CCSprite* spider = [ spiders objectAtIndex: i ];

spider.position = CGPointMake( size.width * i + size.width *0.5f , screenSize.height + size.height );

[ spider stopAllActions ];

}

// 让蜘蛛频繁落下的方法

// unschedule the selector just in case. if it isn't scheduled it won't do anything.

[ self unschedule:@selector( spidersUpdate:) ];

// schedule the spiders update logic to run at the given interval.

[ self schedule:@selector( spidersUpdate:) interval:0.7f ];

// reset the move spiders counter and spider move duration ( affects speed )

numSpidersMoved = 0;

spiderMoveDuration = 4.0f;

}

// 控制蜘蛛的运动

- (void) runSpiderMoveSequence: (CCSprite*)spider

{

// slowly increase the spider speed over time

numSpidersMoved++;

if (numSpidersMoved % 8 ==0 && spiderMoveDuration >2.0f )

{

spiderMoveDuration -=0.1f;

}

// this is the sequence which controls the spiders' movement.

CGPoint belowScreenPosition = CGPointMake( spider.position.x , - [ spidertexture ].contentSize.height );

CCMoveTo* move = [ CCMoveTo actionWithDuration:spiderMoveDuration

position: belowScreenPosition ];

CCCallFuncN* callDidDrop = [ CCCallFuncN actionWithTarget: self

selector: @selector(spiderDidDrop:) ];

CCSequence* sequence = [ CCSequence actions: move , callDidDrop , nil ];

[ spider runAction: sequence ];

}

// 重设蜘蛛位置使之可以从屏幕上方重新落下

- (void) spiderDidDrop: (id) sender

{

// make sure sender is actually of the right class.

NSAssert( [ sender isKindOfClass: [ CCSprite class ] ], @"sender is not a CCSprite!" );

CCSprite* spider = ( CCSprite* )sender;

// move the spider back up outside the top of the screen

CGPoint pos = spider.position;

CGSize screenSize = [ [ CCDirector sharedDirector ] winSize ];

pos.y = screenSize.height + [ spidertexture ].contentSize.height;

spider.position = pos;

}

// 让蜘蛛频繁落下的方法

- (void) spidersUpdate: (ccTime) delta

{

// CCLOG( @"999" );

// try to find a spider which isn't currently moving.

for ( int i = 0 ; i < 10 ; i++ )

{

int randomSpiderIndex = CCRANDOM_0_1() * [ spiders count ];

// CCLOG( @"%d" , randomSpiderIndex );

CCSprite* spider = [ spiders objectAtIndex: randomSpiderIndex ];

// if the spider isn't moving it won't have any running actions.

if ( [ spider numberOfRunningActions ] ==0 )

{

// This is the sequence which controls the spiders' movement

[ self runSpiderMoveSequence: spider ];

// only one spider should start moving at a time.

break;

}

totalTime += delta;

int currentTime = (int)totalTime;

if ( score < currentTime )

{

score = currentTime;

[ scoreLabel setString: [NSString stringWithFormat: @"%d" , score ] ];

}

//初始化障碍物

- (void) initSpiders

{

CCLOG( @"蜘蛛" );

CGSize screenSize = [ [ CCDirector sharedDirector ] winSize ];

// using a temporary spider sprite is the easiest way to get the image's size

CCSprite* tempSprider = [CCSprite spriteWithFile:@"Ability_Creature_Cursed_01.png" ];

float imageWidth = [ tempSprider texture ].contentSize.width;

// use as many spiders as can fit next to each other over the whole screen width.

int numSpiders = screenSize.width / imageWidth;

// initialize the spiders array using alloc.

spiders = [ [ CCArrayalloc ] initWithCapacity: numSpiders ];

for ( int i = 0 ; i < numSpiders ; i++ )

{

CCSprite* spider = [CCSprite spriteWithFile:@"Ability_Creature_Cursed_01.png" ];

[ self addChild: spiderz: 0 tag:2 ];

CCLOG( @"%@" ,spiders );

// also add the spider to the spiders array.

[ spiders addObject: spider ];

}

// call the method to reposition all spiders

[ selfresetSpiders ];

}

-(id) init

{

if ( ( self = [super init ] ) )

{

CCLOG( @"%@: %@",NSStringFromSelector( _cmd ), self );

self.isAccessibilityElement =YES;

player = [CCSprite spriteWithFile:@"Ability_Druid_PredatoryInstincts.png" ];

[ self addChild:player z: 0tag: 1 ];

CGSize screenSize = [ [ CCDirector sharedDirector ] winSize ];

float imageHeight = [ player texture ].contentSize.height;

player.position =CGPointMake( screenSize.width / 2 , imageHeight / 2 );

[ self scheduleUpdate ];

[ self initSpiders ];

scoreLabel = [CCLabelTTF labelWithString:@"0" fontName:@"Cochin" fontSize:48 ];

scoreLabel.position =CGPointMake( screenSize.width / 2 , screenSize.height );

// ajust the label's anchorPoint's y position to make it align with the top.

scoreLabel.anchorPoint =CGPointMake( 0.5f ,1.0f );

// add the score label with z value of -1 so it's drawn below everything else

[ self addChild:scoreLabel z: -1 ];

}

return self;

}

-(void) dealloc

{

CCLOG(@"%@: %@", NSStringFromSelector(_cmd ) , self );

// 障碍物

[ spiders release ];

spiders = nil;

// 标签

[ scoreLabel release ];

//never forget to call [ super dealloc ]

[ super dealloc ];

}

//加速计输入

- (void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration

{

// CGPoint pos = player.position;

// pos.x += acceleration.x * 10;

// player.position = pos;

// controls how quickly velocity decelerates (lower = quicker to change direction )

float deceleration = 0.4f;

// determines how sensitive the accelerometer reacts ( higher = more sensitive )

float sensitivity = 6.0f;

// how fast the velocity can be at most

float maxVelocity = 100;

// adjust velocity based on current accelerometer acceleration

playerVelocity.x =playerVelocity.x * deceleration + acceleration.x * sensitivity;

// we must limit the maximum velocity of the player sprites , in both directions

if ( playerVelocity.x > maxVelocity )

{

playerVelocity.x = maxVelocity;

}

else if ( playerVelocity.x < - maxVelocity )

{

playerVelocity.x = - maxVelocity;

}

// 碰撞检测

- (void) checkForCollision

{

// assumption : both player and spider images are squares.

float playerImageSize = [ player texture ].contentSize.width;

float spiderImageSize = [ [ spiders lastObject ] texture ].contentSize.width;

float playerCollisionRadius = playerImageSize *0.4f;

float spiderCollisionRadius = spiderImageSize *0.4f;

// this collision distance will roughly equal the image shapes.

float maxCollisionDistance = playerCollisionRadius + spiderCollisionRadius;

int numSpiders = [ spiderscount ];

for ( int i = 0 ; i < numSpiders ; i++ )

{

CCSprite* spider = [ spiders objectAtIndex: i ];

if ( [ spider numberOfRunningActions ] ==0 )

{

// this spider isn't even moving so we can skip checking it.

continue;

}

// get the distance between player and spider.

float actualDistance = ccpDistance( player.position , spider.position );

// are the two objects closer than allowed?

if ( actualDistance < maxCollisionDistance )

{

// game Over ( just restart the game for now )

[ self resetSpiders ];

score = 0;

totalTime = 0;

[ scoreLabel setString: [NSString stringWithFormat: @"%d" , score ] ];

break;

}

- (void) update:(ccTime)delta

{

// Keep adding up the playerVelocity to the player's position

CGPoint pos =player.position;

pos.x += playerVelocity.x;

// The Player should also be stopped from going outside the screen

CGSize screenSize = [ [ CCDirector sharedDirector ] winSize ];

float imageWidthHalved = [ player texture ].contentSize.width *0.5f;

float leftBorderLimit = imageWidthHalved;

float rightBorderLimit = screenSize.width - imageWidthHalved;

// preventing the player sprite from moving outside the screen

if ( pos.x < leftBorderLimit )

{

pos.x = leftBorderLimit;

playerVelocity = CGPointZero;

}

else if ( pos.x > rightBorderLimit )

{

pos.x = rightBorderLimit;

playerVelocity = CGPointZero;

}

// assigning the modified position back

player.position = pos;

[ selfcheckForCollision ];

}

@end