void SetBaseColors(std::vector<double> & base_color);
double GetBaseColors(unsigned int index);
void SetGreyLevelBoundaries(std::vector<double> & grey_level_boundary);
+ void SetBaseTransparence(std::vector<double> & base_transparence);
double GetGreyLevelBoundaries(unsigned int index);
void SetPlainOrGradientColor(bool color_type);
int GetBaseColorNb();