この例では、すべてのポリゴン アイランド(それぞれを PolygonFaceCollection として)の配列を戻す関数を実装することにより、ポリゴン アイランドを列挙する方法を示します。
function GetIslands(in_obj) { var arrIslands = new Array(); var plyPolygons = in_obj.ActivePrimitive.Geometry.Polygons; var arrSeen = new Array(plyPolygons.Count); // for optimization for ( var i=0; i<plyPolygons.Count; i++ ) { // Skip any we've already seen if ( arrSeen[i] ) { continue; } // Stuff the current polygon into an XSICollection (custom // filters only accept and return XSICollections) var xsiCurrPolygons = new ActiveXObject("XSI.Collection"); xsiCurrPolygons.Add(plyPolygons(i)); // Activate and apply the filter var fltPolyIslandFilter = Application.Filters("Polygon_Island"); var xsiCurrIslands = fltPolyIslandFilter.Subset(xsiCurrPolygons); // To return an actual PolygonFaceCollection instead of an // XSICollection, we can convert it via the SubComponent var plyCurrIslands = Dictionary.GetObject(xsiCurrIslands).SubComponent.ComponentCollection; // Indicate that we've see all of these components (optimization) for ( var j=0; j<plyCurrIslands.Count; j++ ) { arrSeen[plyCurrIslands(j).Index] = 1; } // Add the PolygonFaceCollection of polygon islands to the return array arrIslands.push(plyCurrIslands); } return arrIslands; } // Open the club bot sample scene and select the feet polygon mesh var strClubBot = XSIUtils.BuildPath( Application.InstallationPath(siFactoryPath), "Data", "XSI_SAMPLES", "Scenes", "club_bot.scn" ); OpenScene(strClubBot, false); SelectObj("club_bot.BotFeet"); // Using this in a tool, you might use the selection: var e = new Enumerator(Selection); for ( ; !e.atEnd(); e.moveNext() ) { var obj = e.item(); var arrPolyIslands = GetIslands(obj); Application.LogMessage( "# of polygon islands: " + arrPolyIslands.length ); } // Expected results: // INFO : # of arrPolyIslands: 2