combine graphics
849
1
01-07-2013 11:29 AM
by
Karl,
You will need to work with lower level geometries like rings and points. Here is a function I use in one of my widgets for this:
Don't forget to click the Mark as answer check on this post and to click the top arrow (promote).
Follow these steps as shown in the below graphic:
You will need to work with lower level geometries like rings and points. Here is a function I use in one of my widgets for this:
/*
* Function That takes all the graphics in a defined GraphicsLayer and adds unions them into one geometry
* @param GraphicsLayer gl is the graphics layer to union
* @return Geometry of the unioned graphics
*/
private function unionGeoms2(gl:GraphicsLayer):Geometry
{
var retGeom:Geometry;
var mPoint:Multipoint = new Multipoint(null);
mPoint.spatialReference = map.spatialReference;
var mPoly:Polygon = new Polygon(null);
mPoly.spatialReference = map.spatialReference;
var mPolyL:Polyline = new Polyline(null);
mPolyL.spatialReference = map.spatialReference;
var rType:String;
for each (var graphic:Graphic in gl.graphicProvider){
if(graphic.geometry.type == "esriGeometryPoint" && !addTolerance.selected){
mPoint.addPoint(graphic.geometry as MapPoint);
rType = "point";
}else if (graphic.geometry.type == "esriGeometryPoint" && addTolerance.selected){
var ext2:Extent = createExtentAroundMapPoint(graphic.geometry as MapPoint, pointSearchTolerance) as Extent;
var pA2:Array = [];
pA2.push(new MapPoint(ext2.xmin,ext2.ymin,ext2.spatialReference));
pA2.push(new MapPoint(ext2.xmin,ext2.ymax,ext2.spatialReference));
pA2.push(new MapPoint(ext2.xmax,ext2.ymax,ext2.spatialReference));
pA2.push(new MapPoint(ext2.xmax,ext2.ymin,ext2.spatialReference));
pA2.push(new MapPoint(ext2.xmin,ext2.ymin,ext2.spatialReference));
mPoly.addRing(pA2);
rType = "poly";
mPoly.spatialReference = ext2.spatialReference;
}
if(graphic.geometry.type == "esriGeometryMultipoint"){
var mp:Multipoint = graphic.geometry as Multipoint
var pnts:MapPoint;
for (var p:int=0;p < mp.points.length; p++){
mPoint.addPoint(mp.points
);
}
rType = "point";
}
if(graphic.geometry.type == "esriGeometryPolygon"){
var poly:Polygon = graphic.geometry as Polygon;
for (var i2:int = poly.rings.length - 1; i2 >= 0; i2--){
var ringArray:Array = [];
for (var j1:int = 0; j1 < poly.rings[i2].length; j1++){
var mp2:MapPoint = poly.getPoint(i2,j1) as MapPoint;
mp2.spatialReference = poly.spatialReference;
ringArray.push(mp2);
}
mPoly.addRing(ringArray);
}
rType = "poly";
mPoly.spatialReference = poly.spatialReference;
}
if(graphic.geometry.type == "esriGeometryPolyline"){
var polyl:Polyline = graphic.geometry as Polyline;
for(var l:int=polyl.paths.length-1; l >= 0; l--){
var pathArray:Array = [];
for (var j2:int = 0; j2 < polyl.paths.length; j2++){
var mp3:MapPoint = polyl.getPoint(l,j2) as MapPoint;
mp3.spatialReference = polyl.spatialReference;
pathArray.push(mp3);
}
mPolyL.addPath(pathArray);
}
rType = "line";
}
if(graphic.geometry.type == "esriGeometryEnvelope"){
var ext:Extent = graphic.geometry as Extent;
var pA:Array = [];
pA.push(new MapPoint(ext.xmin,ext.ymin,ext.spatialReference));
pA.push(new MapPoint(ext.xmin,ext.ymax,ext.spatialReference));
pA.push(new MapPoint(ext.xmax,ext.ymax,ext.spatialReference));
pA.push(new MapPoint(ext.xmax,ext.ymin,ext.spatialReference));
pA.push(new MapPoint(ext.xmin,ext.ymin,ext.spatialReference));
mPoly.addRing(pA);
rType = "poly";
}
}
switch(rType){
case "point":{
retGeom = mPoint;
break;
}
case "poly":{
retGeom = mPoly;
break;
}
case "line":{
retGeom = mPolyL;
break;
}
}
return retGeom;
} Don't forget to click the Mark as answer check on this post and to click the top arrow (promote).
Follow these steps as shown in the below graphic:
