#define PI 3.14159265358979<\/span>\n\nstatic<\/span> inline<\/span> CGPoint<\/span> flipY<\/span>(<\/span>const<\/span> CGPoint<\/span> v<\/span>)<\/span> {<\/span>\n	return<\/span> ccp<\/span>(<\/span>v<\/span>.<\/span>x<\/span>,<\/span> v<\/span>.<\/span>y<\/span> *<\/span> -<\/span>1<\/span>);<\/span>\n}<\/span>\n\nstatic<\/span> inline<\/span> CGPoint<\/span> flipX<\/span>(<\/span>const<\/span> CGPoint<\/span> v<\/span>)<\/span> {<\/span>\n	return<\/span> ccp<\/span>(<\/span>v<\/span>.<\/span>x<\/span> *<\/span> -<\/span>1<\/span>,<\/span> v<\/span>.<\/span>y<\/span>);<\/span>\n}<\/span>\n\nstatic<\/span> inline<\/span> float<\/span> decByFactor<\/span>(<\/span>const<\/span> float<\/span> value<\/span>,<\/span> const<\/span> float<\/span> limit<\/span>,<\/span> const<\/span> float<\/span> factor<\/span>)<\/span> {<\/span>\n\n	if<\/span> (<\/span>factor<\/span> ><\/span> 0<\/span>)<\/span> {<\/span>\n		return<\/span> value<\/span>;<\/span>\n	}<\/span> else<\/span> {<\/span>\n		float<\/span> rv<\/span> =<\/span> value<\/span> *<\/span> factor<\/span>;<\/span>\n		if<\/span> (<\/span>rv<\/span> <<\/span> limit<\/span>)<\/span> \n			rv<\/span> =<\/span> limit<\/span>;<\/span>\n		return<\/span> rv<\/span>;<\/span>\n	}<\/span>\n	\n}<\/span>\n\nstatic<\/span> inline<\/span> float<\/span> incByFactor<\/span>(<\/span>const<\/span> float<\/span> value<\/span>,<\/span> const<\/span> float<\/span> limit<\/span>,<\/span> const<\/span> float<\/span> factor<\/span>)<\/span> {<\/span>\n	\n	if<\/span> (<\/span>factor<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\n		return<\/span> value<\/span>;<\/span>\n	}<\/span> else<\/span> {<\/span>\n		float<\/span> rv<\/span> =<\/span> value<\/span> *<\/span> factor<\/span>;<\/span>\n		if<\/span> (<\/span>rv<\/span> <<\/span> limit<\/span>)<\/span> \n			rv<\/span> =<\/span> limit<\/span>;<\/span>\n		return<\/span> rv<\/span>;<\/span>\n	}<\/span>\n	\n}<\/span>\n\nstatic<\/span> inline<\/span> float<\/span> plotSine<\/span>(<\/span>const<\/span> float<\/span> degrees<\/span>,<\/span> const<\/span> float<\/span> min<\/span>,<\/span> const<\/span> float<\/span> max<\/span>)<\/span> {<\/span>\n	float<\/span> radians<\/span> =<\/span> degrees<\/span> *<\/span> PI<\/span> /<\/span> 180<\/span>;<\/span>\n	float<\/span> offset<\/span> =<\/span> (<\/span>max<\/span> -<\/span> min<\/span>)<\/span> /<\/span> 2<\/span>;<\/span>\n	return<\/span> sin<\/span>(<\/span>radians<\/span>)<\/span> *<\/span> offset<\/span> +<\/span> (<\/span>min<\/span> +<\/span> offset<\/span>);<\/span>\n	\n}<\/span>\n\nstatic<\/span> inline<\/span> CGPoint<\/span> plotCircle<\/span>(<\/span>const<\/span> float<\/span> degrees<\/span>,<\/span> const<\/span> float<\/span> radius<\/span>)<\/span> {<\/span>								   \n	float<\/span> radians<\/span> =<\/span> degrees<\/span> *<\/span> PI<\/span> /<\/span> 180<\/span>;<\/span>\n	return<\/span> CGPointMake<\/span>(<\/span>sin<\/span>(<\/span>radians<\/span>)<\/span> *<\/span> radius<\/span>,<\/span> cos<\/span>(<\/span>radians<\/span>)<\/span> *<\/span> radius<\/span>);<\/span>\n}<\/span>\n<\/pre><\/div>\n