ofxVecSlider
changeSlider( ... )
void changeSlider(const void *parameter, float &value)changeValue( ... )
void changeValue(VecType &value)dim( )
size_t dim()getParameter( )
ofAbstractParameter & getParameter()ofxVecSlider_( )
ofxVecSlider_()operator=( ... )
VecType operator=(const VecType &v)