ObjcUtils.m

@implementation SomeUtils

static NSString * const kPlistName = @"MySettings";
static NSString * const kExtention = @"plist";

+ (NSDictionary*) launchSetting
{
	NSString* path = [[NSBundle mainBundle] pathForResource:kPlistName ofType:kExtention];
	NSDictionary* plist = [NSDictionary dictionaryWithContentsOfFile:path];
	
	return plist[@"LaunchView"];
}


+ (double)map:(double)value
	 inputMin:(double)inputMin
	 inputMax:(double)inputMax
	outputMin:(double)outputMin
	outputMax:(double)outputMax
{
	/*!
	 [code from ofMath.cpp]
	 see also http://ofxfenster.undef.ch/doc/ofMath_8cpp_source.html
	 */
	
	return (value - inputMin) / (inputMax - inputMin) * (outputMax - outputMin) + outputMin;
}

+ (double)convertOrientationToDegrees:(UIDeviceOrientation)orientation
{
	return
	orientation == UIDeviceOrientationPortrait		? 0 :
	orientation == UIDeviceOrientationLandscapeRight	? 90 :
	orientation == UIDeviceOrientationLandscapeLeft		? -90 :
	0;
}

+ (CGPoint)convertTouchToRatioInScreen:(CGPoint)point orientation:(UIDeviceOrientation)orientation;
{
	static const float minRatio = -1.0;
	static const float maxRatio = 1.0;
	
	CGFloat deviceWidth  = CGRectGetWidth([[UIScreen mainScreen] bounds]);
	CGFloat deviceHeight = CGRectGetHeight([[UIScreen mainScreen] bounds]);
	
	CGPoint swapedPos;
	
	if (orientation == UIDeviceOrientationPortrait)
	{
		swapedPos = point;
	}
	else if (orientation == UIDeviceOrientationLandscapeLeft)
	{
		swapedPos.x = deviceHeight - point.y;
		swapedPos.y = point.x;
	}
	else if (orientation == UIDeviceOrientationLandscapeRight)
	{
		swapedPos.x = point.y;
		swapedPos.y = deviceWidth - point.x;
	}
	else
	{
		assert(NO);
	}
	
	
	CGPoint ratio;
	
	if (UIDeviceOrientationIsPortrait(orientation))
	{
		ratio.x = swapedPos.x / deviceWidth  * (maxRatio - minRatio) + minRatio;
		ratio.y = swapedPos.y / deviceHeight * (maxRatio - minRatio) + minRatio;
	}
	else
	{
		ratio.x = swapedPos.x / deviceHeight * (maxRatio - minRatio) + minRatio;
		ratio.y = swapedPos.y / deviceWidth  * (maxRatio - minRatio) + minRatio;
	}

	return ratio;
}

@end