ios - Troubles to detect if a CGPoint is inside a square (diamond-shape) -

i have 2 skspritenode:

• a simple square (a)
• the same square rotation (-45°) (b)

i need check, @ time, if center of skspritenode (a ball) inside 1 of these squares. ball , squares have same parent (the main scene).

override func update(_ currenttime: timeinterval) {      let spritearray = self.nodes(at: ball.position)      let arr = spritearray.filter {$0.name == "square"}      square in arr {         print(square.letter)          if(square.contains(self.puck.position)) {              print("inside")         }      } } 

with simple square (a), code works correctly. data right. know, @ time, if cgpoint center inside or outside square.

but square rotation (b), data aren't desired. cgpoint detected inside it's in square diamond-shape contained.

the skspritenode squares created via level editor.

how can have correct result diamond-shape?

edit 1

using

view.showsphysics = true 

i can see bounds of skspritenode physicsbody. bounds of diamond-square diamond-square , not grey square area.

 square.frame.size -> return grey area  square.size -> return diamond-square 

in apple documentation, func nodes(at p: cgpoint) -> [sknode], method node , not frame, why doesn't work?

there many ways it, work paths , if have perfect diamond describe offer different way comments, create path match diamond uibezierpath because have method containspoint:

let f = square.frame var diamondpath = uibezierpath.init() diamondpath.movetopoint(cgpointmake(f.size.width-f.origin.x,f.origin.y)) diamondpath.addlinetopoint(cgpointmake(f.origin.x,f.size.height-f.origin.y)) diamondpath.addlinetopoint(cgpointmake(f.size.width-f.origin.x,f.size.height)) diamondpath.addlinetopoint(cgpointmake(f.size.width,f.size.height-f.origin.y)) diamondpath.closepath() if diamondpath.containspoint(<#t##point: cgpoint##cgpoint#>) {    // point inside diamond }