### astGetRegionDisc

Returns the centre and radius of a disc containing a 2D Region

#### Description:

This function returns the centre and radius of a disc that just encloses the supplied 2-dimensional Region. The centre is returned as a pair of axis values within the Frame represented by the Region. The value of the Negated attribute is ignored (i.e. it is assumed that the Region has not been negated).

#### Synopsis

void astGetRegionDisc( AstRegion $\ast$this, double centre[2], double $\ast$radius )

#### Parameters:

##### this
Pointer to the Region.
##### centre
Pointer to a two-element array in which to return the axis values at the centre of the bounding disc.