How to create wind effect in spritekit

Question

I was playing angry birds and arrived at this stage where the wind "blows" you and kinda pushes you. was kinda interesting but I really couldnt figure the logic or code that would accomplish this. I know that you could probably use the emitter to create the wind like "look" but i would really like some insight on how you would accomplish the "pushing" of the sprite.

Thank you

Answer 1

You are right about the fact that the emitter can only be used to give the illusion that a wind is blowing.

I am assuming here that you have physicsBodies attached to the nodes which are to be affected by the wind.

In your -update: method,

-(void)update:(CFTimeInterval)currentTime
{

    if (windOn)
    {
        for (SKNode *node in self.children)
        {
            if (node.physicsBody.categoryBitMask == whateverCategory)
            {
                [node.physicsBody applyForce:CGVectorMake(200, 0)];
            }
        }
    }
}  

This simulates a wind blowing from left to right. You will have to adjust the vector to achieve the desired direction and magnitude of the force.