Run ScaleTo and MoveTo actions together

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Run ScaleTo and MoveTo actions together

(7 posts) (2 voices)

Started 2 years ago by changminpak
Latest reply from changminpak

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changminpak
Member

Hi,

I am updating cocos2d ver 0.7.3 to 0.8.2 and having a problem with running two actions together. Especially, MoveTo and ScaleTo.

I wanto move a ball while the ball is getting bigger from position A to B.

I used to call two actions like below with 0.7.3:

sprite.scale = 0.1;
[sprite runAction:[ScaleTo actionWithDuration:1.0 scale:1.0];
[sprite runAction:[MoveTo actionWithDuration:1.0 position: CGPointMake(100, 100) ];

However, the same code does NOT work with 0.8.2. I think it's because the position is now scaled while animating. I tried Spawn action, but it's not working either.

How can I use "global" position for MoveTo action so that ScaleTo does not affect the absolute position? I mean how I can make MoveTo and ScaleTo work together?

Posted 2 years ago #

goldplated
Member

There is an example in SpriteTest that you can go by...

something like this

id action = [Spawn actions:
				 [JumpBy actionWithDuration:2 position:ccp(300,0) height:50 jumps:4],
				 [RotateBy actionWithDuration: 2 angle: 720],
				 nil];

	[sprite runAction:action];

Posted 2 years ago #

goldplated
Member

I guess i could have used an example that had ScaleTo and MoveTo... try this..

id action = [Spawn actions:
				 [MoveTo actionWithDuration:2 position:ccp(300,0)],
				 [ScaleTo actionWithDuration: 2 scale:2.0f],
				 nil];

	[sprite runAction:action];

Posted 2 years ago #

changminpak
Member

goldplated, Thanks, but I do know how to use Spawn.

My problem is that a Spawn action with ScaleTo and MoveTo does NOT work as I expected.

Posted 2 years ago #
goldplated
Member

i guess i wasn't following exactly what the issue is.. :-)

Posted 2 years ago #
goldplated
Member

perhaps sprite.anchorPoint = ccp(0,0); or something will help...

Posted 2 years ago #
changminpak
Member

In fact, [Spawn actions:moveAction, scaleAction, nil] works well with Sprite.

Actually, I was using a Layer that contains several Sprites. I used a Layer to create a composite object. AnchorPoint has changed in 0.8.2, so I have to set these values for a Layer to make ScaleTo and MoveTo work as it did with 0.7.3. I solved my problem.

self.relativeAnchorPoint = YES;
self.anchorPoint = CGPointZero;

BTW, I chose a Layer as a container to hold several Sprites to handle touch events at that time.

Posted 2 years ago #

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