sknode

I have a subclass of SKNode that acts as my "creature". These move about the scene automatically using SKActions. I'm interested in modifying (decreasing) an 'energy' property (Int) as the creature moves. The creature isn't guaranteed to move the entire length of the move SKAction (it can be interrupted), so calculating the total distance and then decreasing the property as soon as it starts moving isn't ideal. I'd essentially like to say "for every 1 second the node is moving, decrease the energy property". How can I do this? I'm at a loss! Thank you. In your GameScene.swift class you have an

I have fairly well developed SpriteKit game I'm working on, added some code to add a new SKSpriteNode to the Scene, (same as I have done dozens of other places in the code, but for some reason this time it is just ignoring the position I have set for the node, I have tried it by explicit .position = CGPointMake(x,y) and trying the [node setPosition:CGPointMake(x,y)] Neither work... the node does get added to the scene, but ALWAYS at 0,0, no matter what I do, have checked both the x and y to make sure they are valid and in the range of the scene, and tried to use explicit floats etc, and it

I have two SKShapeNodes – one with an edge-based SKPhysicsBody, one volume-based – and I want to detect their intersection without collision. I've got this working fine, with the SKPhysicsContactDelegate contact methods getting called as one passes over another, but my issue is that didEndContact gets called when the edges no longer intersect, even when one body is completely contained within the other. What's the best way to determine true contact or overlap, not just edge intersection? I've tried usesPreciseCollisionDetection , to no avail. CGPoint locObj1 = [sprite1 locationInNode:self];

I'm kind of a newb in SpriteKit, game dev, as a matter of fact I'm just learning. So I got to a point where I what to move a bunch of nodes towards a users tap location. So far I fought that I might calculate a virtual right triangle and get sin and cos of angles based on the sides. Unfortunately that left me with a very strong impulse that doesn't really consider the user tap location. Any ideas? Thanks in advance. Look up the shooting projectiles section in the tutorial by Ray Wenderlich here: http://www.raywenderlich.com/42699/spritekit-tutorial-for-beginners Change the code from the