Render a 3D Model using Swift 3 and Metal API's

I need code that runs on iOS which will render a male and female 3D model in a given view. Here are the detailed requirements: 1) All code should be written in Swift 3 2) It should run on iOS 3) It should use Apple's metal API's [login to view URL] 4) The male and female models you use should allow individual muscles to be highlighted, hidden, and displayed. Once I agree on your model selections I will purchase it and send it to you. An example of a male model that may work well is here: [login to view URL] 5) The background color behind the model should be settable programmatically. 6) The user should be able to drag their finger left/right on the model to rotate the model left and right 7) The API should allow individual muscle colors to be programmatically updated to emphasis specific muscles. 8) The API should allow individual muscles to be shown/hidden programmatically. 9) The models purchased should allow fine grained rendering of individual muscles in the human body. A list of all muscles that will be controllable should be provided and approved by me before the model is purchased and development begins. 10) The API to work with the model should be confirmed before any development begins. Here is a simplified example of how it should look: enum Muscle { case Hamstring case Tricep case Bicep ........ } class MuscleModeler { var backgroundColor: UIColor func attach(toView view: UIView inViewController viewController: UIViewController) func startRendering() func stopRendering() func update(muscle: Muscle, hidden: Bool) func update(muscle: Muscle, color: UIColor) }