reworked TransitionPreprocessor

Sources/Preprocessors/CascadePreprocessor.swift

@@ -35,37 +35,28 @@ public enum CascadeDirection {
     case rightToLeft
     case rightToLeft
     case radial(center:CGPoint)
     case radial(center:CGPoint)
     case inverseRadial(center:CGPoint)
     case inverseRadial(center:CGPoint)
+  
     var comparator: (UIView, UIView) -> Bool {
     var comparator: (UIView, UIView) -> Bool {
         switch self {
         switch self {
         case .topToBottom:
         case .topToBottom:
             return { return $0.frame.minY < $1.frame.minY }
             return { return $0.frame.minY < $1.frame.minY }
+    
         case .bottomToTop:
         case .bottomToTop:
             return { return $0.frame.maxY == $1.frame.maxY ? $0.frame.maxX > $1.frame.maxX : $0.frame.maxY > $1.frame.maxY }
             return { return $0.frame.maxY == $1.frame.maxY ? $0.frame.maxX > $1.frame.maxX : $0.frame.maxY > $1.frame.maxY }
+        
         case .leftToRight:
         case .leftToRight:
             return { return $0.frame.minX < $1.frame.minX }
             return { return $0.frame.minX < $1.frame.minX }
+    
         case .rightToLeft:
         case .rightToLeft:
             return { return $0.frame.maxX > $1.frame.maxX }
             return { return $0.frame.maxX > $1.frame.maxX }
+    
         case .radial(let center):
         case .radial(let center):
             return { return $0.center.distance(center) < $1.center.distance(center) }
             return { return $0.center.distance(center) < $1.center.distance(center) }
+    
         case .inverseRadial(let center):
         case .inverseRadial(let center):
             return { return $0.center.distance(center) > $1.center.distance(center) }
             return { return $0.center.distance(center) > $1.center.distance(center) }
         }
         }
     }
     }
-
-  init?(_ string: String) {
-    switch string {
-    case "bottomToTop":
-      self = .bottomToTop
-    case "leftToRight":
-      self = .leftToRight
-    case "rightToLeft":
-      self = .rightToLeft
-    case "topToBottom":
-      self = .topToBottom
-    default:
-      return nil
-    }
-  }
 }
 }
 
 
 class CascadePreprocessor: MotionPreprocessor {
 class CascadePreprocessor: MotionPreprocessor {