pushing before transfering ownership

added new tests and new helper classes
speed improvements
minor fixes

geo/Length.h

@@ -0,0 +1,60 @@
+#ifndef LENGTH_H
+#define LENGTH_H
+
+
+
+
+/**
+ * unit independent length measurement
+ */
+template <typename T, int mul> struct Length {
+
+private:
+
+	const T val;
+
+	/** delete empty ctor */
+	Length() = delete;
+
+	/** hidden value ctor */
+	Length(const T val) : val(val) {;}
+
+public:
+
+	/** construct from mm */
+	static Length mm(const T mm)	{return Length(mm * mul / 1000);}
+
+	/** construct from cm */
+	static Length cm(const T cm)	{return Length(cm * mul / 100);}
+
+	/** construct from m */
+	static Length m(const T m)		{return Length(m * mul / 1);}
+
+public:
+
+	/** get in mm */
+	T mm() const	{return val * 1000 / mul;}
+
+	/** get in cm */
+	T cm() const	{return val * 100 / mul;}
+
+	/** get in m */
+	T m() const		{return val * 1 / mul;}
+
+public:
+
+	/** add the given length */
+	Length operator + (const Length o) {return Length(m+o.m);}
+
+	/** subtract the given length */
+	Length operator - (const Length o) {return Length(m+o.m);}
+
+};
+
+/** float. internally stored in meters */
+typedef Length<float, 1> LengthF;
+
+/** int. internally stored in millimeters */
+typedef Length<int, 1000> LengthI;
+
+#endif // LENGTH_H