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Declaration:procedure FindRingNexttoCursor (x,y: single; var Ring: RingType);

The procedure FindRingNextToCursor searches the ring which is next to the position [x,y ]. The ring is searched by the following algorithm: First the 6 (or less, if the molecule is smaller) most nearest atoms are determined. For each of these 6 atoms the routine FindShortestRings is used to get a list of possible candidate rings. The ring whose atoms have the smallest sum of distance to the cursor point is returned as result in the variable parameter Ring.

Last Update: 2012-Oct-20