Fixed issue #69

Multiple commits caused math issues by modifying the positioning
equations. Copied the original equations back in, and re-modified them
to keep build time low

M13Checkbox.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "M13Checkbox"
-  s.version      = "2.2.5"
+  s.version      = "2.2.6"
   s.summary      = "A beautiful, customizable, extendable, animated checkbox for iOS."
 
   s.description  = <<-DESC
@@ -26,7 +26,7 @@ Pod::Spec.new do |s|
 
   s.platform     = :ios, '8.0'
 
-  s.source = { :git => "https://github.com/Marxon13/M13Checkbox.git", :tag => "2.2.5"}
+  s.source = { :git => "https://github.com/Marxon13/M13Checkbox.git", :tag => "2.2.6"}
 
   s.source_files  = 'Sources/**/*'
 

Sources/M13CheckboxPathPresets.swift

@@ -106,17 +106,17 @@ internal class M13CheckboxPathPresets {
                 // On the corner
                 let cos2Theta: CGFloat = cos(2.0 * theta)
                 let sin2Theta: CGFloat = sin(2.0 * theta)
-                let sqrtV: CGFloat = sqrt(((4.0 * cornerRadius) - size) * size)
-                let powV: CGFloat = pow((2.0 * cornerRadius) + size, 2.0)
+                let powC: CGFloat = pow((-2.0 * cornerRadius) + size, 2.0)
 
                 let a: CGFloat = size * (3.0 + cos2Theta + sin2Theta)
                 let b: CGFloat = -2.0 * cornerRadius * (cos(theta) + sin(theta))
-                let c: CGFloat = sqrtV + (powV * sin2Theta)
+                let c: CGFloat = (((4.0 * cornerRadius) - size) * size) + (powC * sin2Theta)
                 let d: CGFloat = size * cos(theta) * (cos(theta) - sin(theta))
                 let e: CGFloat = 2.0 * cornerRadius * sin(theta) * (cos(theta) + sin(theta))
 
-                let x: CGFloat = 0.25 * (a + (2.0 * (b + c) * cos(theta))) + (boxLineWidth / 2.0)
-                let y: CGFloat = 0.5 * (d + e - (c * sin(theta))) + (boxLineWidth / 2.0)
+                let x: CGFloat = 0.25 * (a + (2.0 * (b + sqrt(c)) * cos(theta))) - boxLineWidth
+                let y: CGFloat = 0.50 * (d + e - (sqrt(c) * sin(theta))) + boxLineWidth
+
 
                 return CGPoint(x: x, y: y)
             }