SpriteKit's SKPhysicsBody with polygon helper tool

Question

I wonder if there is a tool that could be used for easy generation of complex physics bodies in SpriteKit. I would like to have a volume based physical bodies with polygon-t

Answer 1

I am looking for the exact same thing, as it turn out I have done a small web app for this purpose.

SKPhysicsBody Path Generator

as action in example:

Update 2015-02-13: script

    
        
        
        

        

    
    
        

            
SKPhysicsBody Path Generator
            
Want to use [SKPhysicsBody bodyWithPolygonFromPath:path] easier way like me? Here with a small helper for easier path drawing, hope it help others too.
            

                

                    
Basic Instruction
                    

                        
Drag and drop the sprite image into drop zone.
                        
Start drawing path by clicking on coordinates.
                    
                
                

                    
Some Rules / Known Issue
                    

                        
Path need to be as a convex polygonal path with counterclockwise winding and no self intersections. The points are specified relative to the owning node’s origin. (documentation link)
                        
Please use Chrome for best compatibility as I have not tested on other browsers.
                    
                
            


            


            

                Reset Shape
                Reset All
            
             Retina? (please check before declaring path)
            



            
            

            
X:0 Y:0
            


            
Output
SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@"img"];

CGFloat offsetX = sprite.frame.size.width * sprite.anchorPoint.x;
CGFloat offsetY = sprite.frame.size.height * sprite.anchorPoint.y;

CGMutablePathRef path = CGPathCreateMutable();


CGPathCloseSubpath(path);

sprite.physicsBody = [SKPhysicsBody bodyWithPolygonFromPath:path];