Book Image

Learning iPhone Game Development with Cocos2D 3.0

By : Kirill Muzykov
Book Image

Learning iPhone Game Development with Cocos2D 3.0

By: Kirill Muzykov

Overview of this book

Table of Contents (19 chapters)
Learning iPhone Game Development with Cocos2D 3.0
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Time for action – adding ground to the scene


Most of the times you'll want your object to stay on the screen instead of falling into the abyss. So, let's add some ground that will stop the stone from falling further. Refer to the following steps:

  1. Open the PhysicsScene.m file and add the _ground instance variable:

    @implementation PhysicsScene
    {
       //..skipped..
    
       CCSprite *_ground;
    }
  2. Then, before adding the ground sprite, add one more z-order #define statement, between kBackgroundZ and kObjectsZ as shown in the following code:

    #define kBackgroundZ    10
    #define kGroundZ        15
    #define kObjectsZ       20
  3. Now, add the addGround method as follows:

    -(void)addGround
    {
        //1
        _ground = [CCSprite spriteWithImageNamed:@"ground.png"];
        
        //2
        CGRect groundRect;
        groundRect.origin = CGPointZero;
        groundRect.size = _ground.contentSize;
        
        //3
        CCPhysicsBody *groundBody = 
          [CCPhysicsBody bodyWithRect:groundRect cornerRadius:0];
        
        //4
        groundBody.type = CCPhysicsBodyTypeStatic...