cocos2d for iPhone

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

1. 

   spaceghost
   Member

   hello, first let me say that cocos2d has been a great bridge from AS3 to Obj-C programming and very helpful in getting our games projects off the ground. thanks to everyone involved in bringing this to the dev community!

   anyway, I'm trying a simple game action where a sprite is jumping straight up and down (in landscape aspect)... using either JumpBy or MoveBy... and then when the phone is tilted either right or left, the sprite's x position should move in that direction.

   isAccelerometerEnabled is set to yes, and I know it's working because the callback function also changes the sprite rotation, but making any changes to sprite.position in the callback do nothing... and the sprite just keeps jumping straight up and down.

   any ideas on getting this together would be most helpful!

   Posted 2 years ago #
2. 

   natanavra
   Member

   You should use a combo of jumpBy and moveBy in your accelerometer callback...

   [mySprite runAction:[moveBy actionWithDuration: 0.1 position: ccp(acceleration.x, 0)]]; // I think this is how it should look like

   Sorry if I mistook your question, could you post you accelerometer callback function??

   ~ Natanavra.

   Posted 2 years ago #
3. 

   spaceghost
   Member

   thanks for that suggestion... I'll give it a try

   here's my init function to create the sprite (and move action), followed by the accelerator callback:

   #######

   -(id) init
   {
   if( (self=[super init] )) {

   self.isTouchEnabled = YES;
   self.isAccelerometerEnabled = YES;

   Sprite *sprite = [Sprite spriteWithFile:@"sprite.png"];
   CGSize spriteSize = [sprite contentSize];
   sprite.position = ccp( size.width/2, spriteSize.height/2);

   id move = [MoveBy actionWithDuration:.5 position:ccp(0,sprite.position.y + 150)];

   id repeat = [RepeatForever actionWithAction:[Sequence actions: move, [move reverse], nil]];

   [self addChild:sprite z:1 tag:kTagSprite];

   [sprite runAction:repeat];

   }
   return self;
   }

   - (void)accelerometer:(UIAccelerometer*)accelerometer didAccelerate:(UIAcceleration*)acceleration
   {
   CocosNode *sprite = [self getChildByTag:kTagSprite];

   // Convert the coordinates to 'landscape' coords
   // since they are always in 'portrait' coordinates
   CGPoint converted = ccp( (float)-acceleration.y, (float)acceleration.x);

   int deltaX = (converted.y<=0)? sprite.position.x-2:sprite.position.x+2;

   sprite.position = ccp(deltaX,sprite.position.y);

   // update the rotation based on the z-rotation
   // the sprite will always be 'standing up'
   sprite.rotation = (float) CC_RADIANS_TO_DEGREES( atan2f( converted.x, converted.y) + M_PI );

   }

   Posted 2 years ago #
4. 

   okayra
   Member

   Hi spaceghost,

   Have you sort your things up? Cause I am new also ,trying to handle same issue. Thnks for advance reply.

   Posted 2 years ago #
5. 

   Poojan
   Member

   Thanks it's Working for me..

   Posted 1 year ago #

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