cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   trump-card
   Member

   Hello!

   I move the Sky.png from left to right and I want to loop the sky moving. I mean when right edge if the Sky texture hides then it appears on left side.
   My code is
   

   @implementation MyLayer
   
   - (id) init
   {
      ...
      s = [Sprite spriteWithFile:@"Sky.png"];
      [s setPosition:ccp(160, 380)];
   
      ccTexParams params;
      params.wrapS = GL_REPEAT;
      params.wrapT = GL_REPEAT;
      [s setTexParameters:&params];
   
      [self addChild:s];
   }
   
   - (void) gameStep: (ccTime)delta
   {
      [s setPosition:ccp(x, 380)];
   
      s += 0.25;
   }
   @end

   What is wrong with it?

   Thanks

   Posted 2 years ago #
2. 

   Zemm
   Member

   I'm not sure how to do what you're looking to do exactly, but looking at the code above I don't see how s += 0.25; would compile, as I don't think Sprite responds to the + operator. I think that's supposed to be x += 0.25;

   And it might help for people who do know how to do what you want do, if you included a description of what your code is currently doing (what's wrong with it?).

   Good luck!

   Posted 2 years ago #
3. 

   Steve Oldmeadow
   Administrator

   This might be of interest:
   http://groups.google.com/group/cocos2d-iphone-discuss/browse_thread/thread/6a11e259fdaed9e3/fd1ff17a4eef1112?lnk=raot

   If you are trying to use the GL_REPEAT technique to scroll then you do not move the sprite you adjust the texture mapping. If you don't use the GL_REPEAT technique then at some point you will need to do two draw operations when the seam between the end of the texture and the start of the texture is on the screen.

   Posted 2 years ago #
4. 

   riq
   Key Master

   Inspired on the original thread, I've just added an example that shows how to use GL_REPEAT with AtlasSprite.

   http://code.google.com/p/cocos2d-iphone/source/browse/trunk/tests/Texture2dTest.m?spec=svn1225&r=1225#596

   Posted 2 years ago #
5. 

   Yin
   Member

   you really great, actually I was really messed up by ninja jumper, but you did it a simply way!

   Posted 2 years ago #
6. 

   aibo99
   Member

   What is the solution ?

   Thanks

   Posted 1 year ago #

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