regionNeighbor

Name

regionNeighbor - are two regions neighbors?

Syntax

 #include <xite/region.h>

 int regionNeighbor( region* reg1, region* reg2,
    int* overlap, int* adjacent, int nc );

Description

Returns overlap=TRUE if reg1 and reg2 overlaps, adjacent=TRUE if the two regions are adjacent but do not overlap. If the two regions are not neighbors, both overlap and adjacent are FALSE. nc, neighborhood connectedness, may be one of:

 1 : use the nc value found in reg1
 2 : use the nc value found in reg2
 4 : use 4-neighbours
 8 : use 8-neighbours

Return value

 0 => ok
 1 => reg1 or reg2 are nil
 2 => bad nc value

Diagnostics

 Warning 2 : region argument nil
 Error 3 : bad nc argument

regionAnalyse(1), regionArea(3), regionConvexHull(3), regionCreate(3), regionDraw(3), regionFree(3), regionHisto(3), regionHistoUpdate(3), regionImoment(3), regionInsertYline(3), regionDeleteYline(3) regionEndInsert(3), regionXmean(3), regionYmean(3), regionMean(3), regionXmin(3), regionXmax(3), regionYmin(3), regionYmax(3), regionMinMax(3), regionCMoment(3), regionPMoment(3), regionMoment(3), regionPerform(3), regionPerimeter(3), regionIsPoint(3), regionPoint(3), regionSearch(3), regionSort(3), regionCopy(3), regionUnion(3), regionOverlap(3), regionVolume(3), regionYline(3)

Author

Tor L|nnestad, BLAB, ifi, UiO New algorithm by Otto Milvang

Example

 region *reg1, *reg2;
 int overlap, adjacent;
 ..create reg1 and reg2..
 regionNeighbor(reg1, reg2, &overlap, &adjacent, 4);

Id

$Id: regionUnion.c,v 1.20 1997/01/29 10:45:15 svein Exp $