define the value for a DataRange control point in the Datamap
group+OPort DmapColor {
double v1; /* Alpha component of Color */
double v2; /* 1st component of Color */
double v3; /* 2nd component of Color */
double v4; /* 3rd component of Color */
};
DmapColor DatamapValue {
double value;
};
DatamapValue specifies a control point color. A data range whose model is linear often has two control points, and thus two control-point colors.
Libraries.Templates.DMAP.DefaultLinearRange
Libraries.Templates.DMAP.DefaultStepRange