gistfile1.cs

using System;
using UnityEngine;
using System.Collections;

public class Device {

  //**************************************************************************
	//
	// Const
	//
	//**************************************************************************

	const float ASPECT_IPHONE = 3f / 4f;
	const float ASPECT_IPHONE5 = 71f / 40f;
	const float ASPECT_IPAD = 4f / 3f;

	//**************************************************************************
	//
	// Constructor static!
	//
	//**************************************************************************
	static Device()
	{

		if (Const.FORCE_DEVICE_TYPE != null)
		{
			current = Const.FORCE_DEVICE_TYPE;
			return;
		}

		float aspect = GetDeviceAspect();

		if (Mathf.Approximately(aspect, ASPECT_IPHONE5))
		{
			
			current = DevicesType.iPhone5;
		}
		else if (Mathf.Approximately(aspect, ASPECT_IPAD))
		{
			
			current = DevicesType.iPad;
		}
		else
		{
			current = DevicesType.iPhone;
		}
	}

	//**************************************************************************
	//
	// Public
	//
	//**************************************************************************

	// Devices types, divided by aspect 
	public enum DevicesType { iPhone, iPhone5, iPad }

	//**************************************************************************
	// If for device need passive
	public static bool IsNeedPassiveBackground()
	{

		return Current == DevicesType.iPad || Current == DevicesType.iPhone5;
	}

	//**************************************************************************
	// If for device need passive background on top
	public static bool IsPassiveBackgroundOnTop()
	{

		return Current == DevicesType.iPad;
	}

	//**************************************************************************
	// If for device need passive background on left and right side
	public static bool IsPassiveBackgroundOnSides()
	{

		return Current == DevicesType.iPhone5;
	}

	//**************************************************************************
	// Active background width size in world coords
	public static float GetActiveBackgroundWidth()
	{
		return GetActiveBackgroundAspect() * ActiveBackgroundHeight();
	}

	//**************************************************************************
	// Active background heigt size in world coords
	public static float GetActiveBackgroundHeigt()
	{
		return GetActiveBackgroundWidth() / Const.BACKGROUND_ACTIVE_ASPECT;
	}

	//**************************************************************************
	//
	// Private
	//
	//**************************************************************************

	// Static constructor detect current device type by aspect and set this property 
	private static readonly DevicesType current;

	//**************************************************************************
	// Return current device type, detected by aspect
	private static DevicesType Current
	{
		get { return current; }
	}

	//**************************************************************************
	// Return current device aspect
	private static float GetDeviceAspect()
	{

		return (float)Screen.width / Screen.height;
	}

	//**************************************************************************
	// Return current active background aspect that device depend
	private static float GetActiveBackgroundAspect()
	{
		if (Current == DevicesType.iPhone)
		{
			return Const.BACKGROUND_ACTIVE_ASPECT_SMARTPHONE;
		}

		return Const.BACKGROUND_ACTIVE_ASPECT;
	}

	//**************************************************************************
	// Return current active background aspect that device depend
	private static float ActiveBackgroundHeight()
	{
		if (Current == DevicesType.iPhone)
		{
			return Const.BACKGROUND_ACTIVE_SMARTPHONE_HEIGHT;
		}

		return Const.BACKGROUND_ACTIVE_HEIGHT;
	}
}