private IPolygon method_3()
{
IGeometryCollection geometrys = new PolygonClass();
IRing inGeometry = new RingClass();
IRing ring2 = new RingClass();
IPointCollection points = null;
IPointCollection points2 = null;
object missing = System.Type.Missing;
IPoint inPoint = new PointClass();
IPoint point2 = new PointClass();
IPoint point3 = new PointClass();
IPoint point4 = new PointClass();
points = inGeometry as IPointCollection;
points.AddPoint(base.LeftUp, ref missing, ref missing);
points.AddPoint(base.RightUp, ref missing, ref missing);
points.AddPoint(base.RightLow, ref missing, ref missing);
points.AddPoint(base.LeftLow, ref missing, ref missing);
inGeometry.Close();
geometrys.AddGeometry(inGeometry, ref missing, ref missing);
inPoint.PutCoords(base.LeftUp.X - base.InOutDist, base.LeftUp.Y + base.InOutDist);
point4.PutCoords(base.LeftLow.X - base.InOutDist, base.LeftLow.Y - base.InOutDist);
point3.PutCoords(base.RightLow.X + base.InOutDist, base.RightLow.Y - base.InOutDist);
point2.PutCoords(base.RightUp.X + base.InOutDist, base.RightUp.Y + base.InOutDist);
points2 = ring2 as IPointCollection;
points2.AddPoint(inPoint, ref missing, ref missing);
points2.AddPoint(point2, ref missing, ref missing);
points2.AddPoint(point3, ref missing, ref missing);
points2.AddPoint(point4, ref missing, ref missing);
ring2.Close();
geometrys.AddGeometry(ring2, ref missing, ref missing);
return(geometrys as IPolygon);
}
private IGeometry ConstructRing(IEnumerable <IPoint> points)
{
var r = new RingClass();
foreach (var point in points)
{
r.AddPoint(point);
}
r.Close();
return(r);
}
private void EnvelopeToPolygon(IEnvelope ev) //把envelope变为polygon
{
IRing ring = new RingClass();
object missing1 = Type.Missing;
object missing2 = Type.Missing;
(ring as IPointCollection).AddPoint(ev.LowerLeft, ref missing1, ref missing2);
(ring as IPointCollection).AddPoint(ev.UpperLeft, ref missing1, ref missing2);
(ring as IPointCollection).AddPoint(ev.UpperRight, ref missing1, ref missing2);
(ring as IPointCollection).AddPoint(ev.LowerRight, ref missing1, ref missing2);
(ring as IPointCollection).AddPoint(ev.LowerLeft, ref missing1, ref missing2);
ring.Close();
IPolygon p = new PolygonClass();
(p as IGeometryCollection).AddGeometry(ring, ref missing1, ref missing2);
p.SimplifyPreserveFromTo();
polygon = p as IPolygon;
}
private static IPolygon CreatePunchedSquarePolygon(
double xOffset, double yOffset, double sideLength,
int holes, int pointsPerPart, double z, int rotateSteps,
ISpatialReference sr)
{
var holesInXAndY = (int)Math.Round(Math.Sqrt(holes));
var pointsPerSide = (int)Math.Round(pointsPerPart / 4.0);
IPolygon polygon = new PolygonClass();
polygon.SpatialReference = sr;
GeometryUtils.MakeZAware(polygon);
var geoColl = (IGeometryCollection)polygon;
object missing = Type.Missing;
// Create and add the outer ring
WKSPointZ[] pointArray = CreateSquare(xOffset, yOffset, sideLength,
pointsPerSide,
true,
z);
CollectionUtils.Rotate(pointArray, rotateSteps);
IRing ring = new RingClass();
GeometryUtils.SetWKSPointZs((IPointCollection4)ring, pointArray);
ring.Close();
geoColl.AddGeometry(ring, ref missing, ref missing);
// Create and add inner rings (= holes)
double innerSideLength = sideLength / (1 + (2 * holesInXAndY));
for (var i = 0; i < holesInXAndY; i++)
{
double llx = xOffset + (innerSideLength + 2 * i * innerSideLength);
for (var j = 0; j < holesInXAndY; j++)
{
double lly = yOffset + (innerSideLength + 2 * j * innerSideLength);
pointArray =
CreateSquare(llx, lly, innerSideLength, pointsPerSide, false, z);
CollectionUtils.Rotate(pointArray, rotateSteps);
ring = new RingClass();
GeometryUtils.SetWKSPointZs((IPointCollection4)ring, pointArray);
ring.Close();
geoColl.AddGeometry(ring, ref missing, ref missing);
}
}
geoColl.GeometriesChanged();
polygon.SimplifyPreserveFromTo();
// We closed each ring: poly must be closed too!
Assert.IsTrue(polygon.IsClosed);
return(polygon);
}
private void btnAddFeature_Click(object sender, EventArgs e)
{
IPoint pPoint1 = new PointClass();
pPoint1.PutCoords(82.1935, 21.5459);
IPoint pPoint2 = new PointClass();
pPoint2.PutCoords(89.0913, 21.6609);
IPoint pPoint3 = new PointClass();
pPoint3.PutCoords(88.9763, 15.6828);
IPoint pPoint4 = new PointClass();
pPoint4.PutCoords(79.7793, 15.5679);
// 创建一个环
IRing pRing = new RingClass();
ISegmentCollection pSegmentCollection = pRing as ISegmentCollection;
object Missing1 = Type.Missing;
object Missing2 = Type.Missing;
ILine pLine = new LineClass();
pLine.PutCoords(pPoint1, pPoint2);
pSegmentCollection.AddSegment(pLine as ISegment, ref Missing1, ref Missing2);
pLine = new LineClass();
pLine.PutCoords(pPoint2, pPoint3);
pSegmentCollection.AddSegment(pLine as ISegment, ref Missing1, ref Missing2);
pLine = new LineClass();
pLine.PutCoords(pPoint3, pPoint4);
pSegmentCollection.AddSegment(pLine as ISegment, ref Missing1, ref Missing2);
pLine = new LineClass();
pLine.PutCoords(pPoint4, pPoint1);
pSegmentCollection.AddSegment(pLine as ISegment, ref Missing1, ref Missing2);
pRing.Close();
// 创建多边形
IPolygon pPolygon = new PolygonClass();
IGeometryCollection pGeometryCollection = pPolygon as IGeometryCollection;
pGeometryCollection.AddGeometry(pRing, ref Missing1, ref Missing2);
// 显示多边形
ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbolClass();
IRgbColor pColor = new RgbColorClass();
pColor.Red = 255;
pColor.Blue = 0;
pColor.Green = 0;
pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSDiagonalCross;
pSimpleFillSymbol.Color = pColor;
IFillShapeElement pFillShapeElement = new PolygonElementClass();
pFillShapeElement.Symbol = pSimpleFillSymbol;
IElement pElement = pFillShapeElement as IElement;
pElement.Geometry = pPolygon as IGeometry;
IGraphicsContainer pGraphicsContainer = MainMap.Map as IGraphicsContainer;
pGraphicsContainer.AddElement(pElement, 0);
MainMap.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
static void CreateGrid(TileInfo tiles, int level, IFeatureWorkspace destination, String name)
{
ISpatialReferenceFactory2 sEnv = new SpatialReferenceEnvironment() as ISpatialReferenceFactory2;
ISpatialReference sr = sEnv.CreateSpatialReference((int)tiles.spatialReference);
sr.SetMDomain(-137434824702, 0);
IFeatureClass fc = CreateFeatureClass(destination, name, sr);
LOD lod = tiles.lods[level];
double width = tiles.width * lod.resolution;
double height = tiles.height * lod.resolution;
double y = tiles.originY;
long row = 0;
double maxX = -(tiles.originX + width);
double minY = -(tiles.originY - height);
while (y > minY)
{
double x = tiles.originX;
long col = 0;
while (x < maxX)
{
RingClass ring = new RingClass();
IPoint tl = new PointClass();
tl.PutCoords(x, y);
tl.M = -(((col & 0xFFFF) << 16) + (row & 0xFFFF));
ring.AddPoint(tl);
IPoint tr = new PointClass();
tr.PutCoords(x + width, y);
tr.M = -((((col + 1) & 0xFFFF) << 16) + (row & 0xFFFF));
ring.AddPoint(tr);
IPoint br = new PointClass();
br.PutCoords(x + width, y - width);
br.M = -((((col + 1) & 0xFFFF) << 16) + ((row + 1) & 0xFFFF));
ring.AddPoint(br);
IPoint bl = new PointClass();
bl.PutCoords(x, y - width);
bl.M = -(((col & 0xFFFF) << 16) + ((row + 1) & 0xFFFF));
ring.AddPoint(bl);
ring.AddPoint(tl);
ring.Close();
PolygonClass polygon = new PolygonClass();
polygon.AddGeometry(ring);
IFeature polyFeature = fc.CreateFeature();
polyFeature.Shape = polygon;
polyFeature.Store();
x += width;
col += 1;
}
row += 1;
y -= height;
}
IFeatureClassDescriptor fd = new FeatureClassDescriptorClass();
fd.Create(fc, null, "OBJECTID");
}
private IGeometry ConstructRing(IEnumerable<IPoint> points)
{
var r = new RingClass();
foreach (var point in points)
{
r.AddPoint(point);
}
r.Close();
return r;
}
