Remove assertion of velocity value and clip it instead

flinto · Dec 18, 2015 · d560b8d · d560b8d
1 parent c26a4ea
commit d560b8d
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/RK4Spring.swift b/RK4Spring.swift
@@ -5,7 +5,13 @@ public func RK4SpringAnimation(tension tension:Double, friction:Double, initialV
 
   assert(tension >= 5 && tension <= 1000, "Tension should be 5 ~ 1000")
   assert(friction >= 5 && friction <= 100, "Friction should be 5 ~ 100")
-  assert(initialVelocity >= -100 && initialVelocity <= 100, "Velocity should be -100 ~ 100")
+
+  if initialVelocity < -100 {
+    initialVelocity = -100
+  }
+  else if initialVelocity > 100 {
+    initialVelocity = 100
+  }
 
   var result:[Double] = []
   var value:Double = 0