Objects hiding in CollisionDetect Callback is wierd

cocos2d for iPhone » Programming » cocos2d support (graphics engine)

Objects hiding in CollisionDetect Callback is wierd

(2 posts) (1 voice)

Started 2 years ago by symadept
Latest reply from symadept

Tags:

symadept
Member
Hi,

I am developing a game in which if the Object comes in the range of the Shooter, it shoots it.
1. Once the Object comes in the Shooters range, I will fire a bullet from Shooter position to the Object's position.
2. This request will actually makes the bullet to travel from Tower to the Object.
id actionMove = [MoveTo actionWithDuration:0.5f position: objectPos] [_bulletSprite runAction: actionMove]; _bulletBody->p = ccp(objectPos);
3. Once the Bullet hits the Object, the same kind of callback will be recieved. Problem: Now the issue is,
In the callback method,static int bulletCollision(cpShape *a, cpShape *b, cpContact *contacts, int numContacts, cpFloat normal_coef, void *data) {
a->body->p = ccp(-150, -150); b->body->p = ccp(-250, -250); }
This results into, object disappears first and then bullet reaches there with some time gap

Some more info:
My gameLayer refreshes by 1 sec

Can you please suggest why this delay was happening...

Regards
Mustafa
symadept@gmail.com
Posted 2 years ago #
symadept
Member

I found out what is the problem, its with the requirement for me to move the Sprite(Visual) and the Body(Geometric) together at the same speed.

Actually while moving the sprite to the objects location, I am doing this way.
//Moving sprite id actionBy = [MoveTo actionWithDuration:0.5f position: objectPos]; [_bulletSprite runAction: actionBy];
//Moving body _bulletBody->p = bulletPos; //Here is the catch _bulletBody->v = cpv(0,0);

I guess here is the catch, moving the body. Now what happens is that Body is moving faster than the Sprite because of which I could see CollisionDetect callback is called in which I am hiding the Object and the Sprite actually moves bit later. Now can anyone tell me, how can I move Sprite & Body together with same duration.

Regards
Mustafa
symadept@gmail.com

Posted 2 years ago #

RSS feed for this topic

Reply

You must log in to post.