Latest Contributions by DanielLaidlaw

Does anyone know how to create a partial circle? I have the center point radius and angle along which I need to draw it. Appreciate the help Dan ... View more

Would anyone happen to know how we get the extent from a featureClass. I know we can get the extent by looping through each feature using a cursor, but that seems like an overkill. Is there a better way to get the extent? Appreciate any help. Dan ... View more

I have a polyline that passes through a polygon, I???m trying to get the two intersect points on the polygon edge. If I try to get the fist and last of what is returned for the intersect point collection I get inconsistent results. Does anyone have some input as what I might be doing wrong?  I have my code block below. Appreciate the help vb       Polyline outGeometry = new Polyline();             IGeometryCollection geometryCollection = null;   if(geometryCollection == null) {    IGeometryBag geometryBag = new GeometryBag();    geometryCollection = (IGeometryCollection) geometryBag;    geometryBag.setSpatialReferenceByRef(mySpatialRef));   }             // union all your polylines   for(int i=0; i<featureList.size(); i++) {    geometryCollection.addGeometry(featureList.get(i).getShape(), null, null);   }   outGeometry.constructUnion((IEnumGeometry) geometryCollection);     ((ITopologicalOperator) outGeometry).simplify();     ITopologicalOperator topo ;   geometry = ((ITopologicalOperator)geometry).getBoundary();   topo = (ITopologicalOperator)geometry  ;     IGeometry intersects = topo.intersect((IGeometry) outGeometry,    esriGeometryDimension.esriGeometry0Dimension);     IPointCollection Pts = (IPointCollection)intersects;   for (int j=0;j<Pts.getPointCount();j++){    tempIntersectPointList.addPoint(Pts.getPoint(j), null, null);   } firstPointOnEdge = tempIntersectPointList.getPoint(0) secondPointOnEdge = tempIntersectPointList.getPoint(tempIntersectPointList.getPointCount() - 1), ... View more

I have three points from which I create a triangle, I use IConstructAngle constructThreePoint to get the angles of the triangle, my angles are returned as a double . Is there a way to tell if this in and obtuse angle triangle?  I seem to have forgotten my math.        GeometryEnvironment geometryEnvironment = new GeometryEnvironment();        IConstructAngle constructAngle = geometryEnvironment ;        constructAngle.constructThreePoint(point1, point2,point3); thanks Dan ... View more

Is there a way to extract the point collection of polygon geometry and make sure the point collection runs in anti clockwise direction?? Appreciate any feedback Dan ... View more

I created a circle using ISegmentCollection     ISegmentCollection SegCollection = new Polyline();     SegCollection.setCircle(myPoint, myRadius); I have a line that I created which intersects this circle, is there a way that I can split this circle(segment) using the line? and get two circular arcs along the split points ? Appreciate the help. Dan ... View more

How can I programmatically tell if a polygon feature is a parallelogram?? Appreciate the help vb ... View more

I???m trying to highlight my selected graphic when a user clicks on it but I seem to get an error at the line graphicsContainer.updateElement(pElem), Does anyone happen to know what I might be doing wrong. Appreciate the help. Vik       try       {        IEnumElement enumElement   = graphicsContainer.locateElements(point, LOCATE_ELEMENT_TOLARANCE);        IElement pElem = null ;        if (enumElement != null)   {         pElem = (IElement) enumElement.next();                  graphicsContainerSelect.selectElement(pElem);                  //Change the color of the selected graphic    IRgbColor pColor = new RgbColor();    pColor.setRGB(255); // red    ISimpleFillSymbol pFillSym = new SimpleFillSymbol();    pFillSym.setColor(pColor);    pFillSym.setStyle(com.esri.arcgis.display.esriSimpleFillStyle.esriSFSSolid);    IFillShapeElement fillShapeElement = null;    fillShapeElement = new PolygonElement();    fillShapeElement.setSymbol(pFillSym);           pElem = (IElement) fillShapeElement;                 //Errors out here                  graphicsContainer.updateElement(pElem);                System.out.println("Graphic Selected");            }        System.out.println(" graphicsContainerSelect.getElementSelectionCount() " + graphicsContainerSelect.getElementSelectionCount());        mxDocument.getActivatedView().partialRefresh(esriViewDrawPhase.esriViewGraphicSelection, null, null);       } catch ( Exception e ) { e.printStackTrace(); } ... View more

I�??m trying to run a intersect spatial query (Feaure2) based on the attribute query results of my first feature (Feature1) I do an attribute search on my first feature , What I am returned from my attribute search is FeatureCursor, I how do I get the geomentry from a featureCursor to pass as my spatial query geometry. The is the function I want to pass my attribute geometry results into http://edndoc.esri.com/arcobjects/9.2/java/engine_samples/geodatabase.accessing_data.performspatialquery/example.html Appreciate the help. VB ... View more