private void btnConstructMultiPolygon_Click(object sender, EventArgs e)
{
if (gfactory == null)
gfactory = new GeometryFactory();
multiPolygon = gfactory.CreateGeometry(gviGeometryType.gviGeometryMultiPolygon, gviVertexAttribute.gviVertexAttributeZ) as IMultiPolygon;
if (multiPolygon == null)
return;
//添加第一个polygon
IPolygon polygonFirst = gfactory.CreateGeometry(gviGeometryType.gviGeometryPolygon, gviVertexAttribute.gviVertexAttributeZ) as IPolygon;
if (polygonFirst == null)
return;
/// 外环顺时针：1-4-3-2-1
/// 4-------3
/// | |
/// | |
/// 1-------2
IRing exteriorRing = polygonFirst.ExteriorRing;
point = gfactory.CreatePoint(gviVertexAttribute.gviVertexAttributeZ);
point.SetCoords(0, 0, 0, 0, 1);
exteriorRing.AppendPoint(point);
point.SetCoords(0, 200, 0, 0, 2);
exteriorRing.AppendPoint(point);
point.SetCoords(100, 200, 0, 0, 3);
exteriorRing.AppendPoint(point);
point.SetCoords(100, 0, 0, 0, 4);
exteriorRing.AppendPoint(point);
point.SetCoords(0, 0, 0, 0, 5);
exteriorRing.AppendPoint(point); //闭合
/// 内环逆时针：1-2-3-4-1
/// 4-------3
/// | |
/// | |
/// 1-------2
IRing interiorRing = gfactory.CreateGeometry(gviGeometryType.gviGeometryRing, gviVertexAttribute.gviVertexAttributeZ) as IRing;
point.SetCoords(25, 25, 0, 0, 1);
interiorRing.AppendPoint(point);
point.SetCoords(75, 25, 0, 0, 2);
interiorRing.AppendPoint(point);
point.SetCoords(75, 75, 0, 0, 3);
interiorRing.AppendPoint(point);
point.SetCoords(25, 75, 0, 0, 4);
interiorRing.AppendPoint(point);
point.SetCoords(25, 25, 0, 0, 5);
interiorRing.AppendPoint(point); //闭合
polygonFirst.AddInteriorRing(interiorRing);
//Clone一个新的内环
IRing pInteriorRingNew = interiorRing.Clone() as IRing;
polygonFirst.AddInteriorRing(pInteriorRingNew);
multiPolygon.AddPolygon(polygonFirst);
//Clone一个新的polygon
IPolygon pPolygonNew = polygonFirst.Clone() as IPolygon;
multiPolygon.AddPolygon(pPolygonNew);
MultiSurface geo = new MultiSurface();
// Geometry属性
geo.Dimension = multiPolygon.Dimension;
if (multiPolygon.Envelope != null)
{
geo.MaxX = multiPolygon.Envelope.MaxX;
geo.MaxY = multiPolygon.Envelope.MaxY;
geo.MaxZ = multiPolygon.Envelope.MaxZ;
geo.MinX = multiPolygon.Envelope.MinX;
geo.MinY = multiPolygon.Envelope.MinY;
geo.MinZ = multiPolygon.Envelope.MinZ;
}
geo.GeometryType = multiPolygon.GeometryType;
geo.IsEmpty = multiPolygon.IsEmpty;
geo.IsValid = multiPolygon.IsValid;
geo.VertexAttribute = multiPolygon.VertexAttribute;
geo.HasId = multiPolygon.HasId();
geo.HasM = multiPolygon.HasM();
geo.HasZ = multiPolygon.HasZ();
// GeometryCollection属性
geo.GeometryCount = multiPolygon.GeometryCount;
geo.IsOverlap = multiPolygon.IsOverlap;
// MultiSurface属性
geo.Area = multiPolygon.GetArea();
this.propertyGrid1.SelectedObject = geo;
}
void axRenderControl1_RcMouseClickSelect(IPickResult PickResult, IPoint IntersectPoint, gviModKeyMask Mask, gviMouseSelectMode EventSender)
{
try
{
this.axRenderControl1.FeatureManager.UnhighlightAll();
if (PickResult != null)
{
if (PickResult.Type == gviObjectType.gviObjectFeatureLayer)
{
IFeatureLayerPickResult flpr = PickResult as IFeatureLayerPickResult;
int fid = flpr.FeatureId;
this.axRenderControl1.FeatureManager.HighlightFeature(_featureClass, fid, System.Drawing.Color.Yellow);
//////////////////////////////////////////////////////////////////////////
//
// GeometryConvert的代码添加在这里
//
//////////////////////////////////////////////////////////////////////////
fidList.Clear();
fidList.Add(fid);
IRowBuffer rowGC = _featureClass.GetRow(fidList[0]);
int nPose = rowGC.FieldIndex("Geometry");
if (nPose == -1)
{
MessageBox.Show("不存在Geometry列");
return;
}
// 获取ModelPoint
IModelPoint modelPointGC = null;
if (rowGC != null)
{
nPose = rowGC.FieldIndex("Geometry");
IGeometry geo = rowGC.GetValue(nPose) as IGeometry;
if (geo.GeometryType == gviGeometryType.gviGeometryModelPoint)
{
modelPointGC = geo as IModelPoint;
}
}
this.Text = "拾取成功";
// 获取Model
string modelName = modelPointGC.ModelName;
IModel modelGC = (_featureClass.FeatureDataSet as IResourceManager).GetModel(modelName);
// 1、获取MultiTriMesh
IGeometryConvertor gc = new GeometryConvertor();
IMultiTriMesh multiTM = gc.ModelPointToTriMesh(modelGC, modelPointGC, false);
this.Text = "ModelToTriMesh完成";
if (this.cbCreateRenderTriMesh.Checked)
{
// 创建RenderTriMesh在三维上显示
for (int i = 0; i < multiTM.GeometryCount; i++)
{
ITriMesh tm = multiTM.GetGeometry(i) as ITriMesh;
IRenderTriMesh rtm = this.axRenderControl1.ObjectManager.CreateRenderTriMesh(tm, null, rootId);
//随机颜色填充TriMesh
Random randObj = new Random(i);
int aColor = randObj.Next(0, 255);
int gColor = randObj.Next(0, 255);
int rColor = randObj.Next(0, 255);
ISurfaceSymbol ss = new SurfaceSymbol();
ss.Color = System.Drawing.Color.FromArgb(rColor, gColor, aColor);
rtm.Symbol = ss;
rTMeshList.Add(rtm);
}
}
if (this.cbCreateRenderPolygon.Checked)
{
// 2、获取投影MultiPolygon
IMultiPolygon multiPolygon = gc.ProjectTriMeshToPolygon(multiTM, 1.0);
this.Text = "MultiTriMeshToFootprint完成。面积:" + multiPolygon.GetArea();
// 创建RenderPolygon在三维上显示
for (int i = 0; i < multiPolygon.GeometryCount; i++)
{
IPolygon polygon = multiPolygon.GetGeometry(i) as IPolygon;
IRenderPolygon rpolygon = this.axRenderControl1.ObjectManager.CreateRenderPolygon(polygon, null, rootId);
rPolygonList.Add(rpolygon);
}
}
if (this.cbCreateRenderPolygon2.Checked)
{
// 3、获取切割MultiPolygon
double heightSpec = 0.0, heightIntersect = 0.0;
Double.TryParse(IntersectPoint.Z.ToString(), out heightIntersect);
fidList.Clear();
fidList.Add(fid);
IEnvelope box = _featureClass.GetFeaturesEnvelope(fidList.ToArray(), "Geometry");
heightSpec = System.Math.Abs(heightIntersect - box.MinZ);
// 注意：CutTriMeshToPolygon方法的第三个参数为空间分辨率，应该选择合适值。
// 值过大会导致结果不精确，值过小会导致转换时间过长。使用时应设置大小合适的值来平衡精度和效率问题。
IMultiPolygon multiPolygon2 = gc.CutTriMeshToPolygon(multiTM, heightSpec, 0.5);
this.Text = "MultiTriMeshToFootprint2完成。面积:" + multiPolygon2.GetArea();
// 创建RenderPolygon在三维上显示
for (int i = 0; i < multiPolygon2.GeometryCount; i++)
{
IPolygon polygon2 = multiPolygon2.GetGeometry(i) as IPolygon;
IRenderPolygon rpolygon2 = this.axRenderControl1.ObjectManager.CreateRenderPolygon(polygon2, null, rootId);
rPolygonList2.Add(rpolygon2);
}
}
if (this.cbCreateRenderMulPoint.Checked)
{
// 4、获取MultiPoint
IMultiPoint multiPoint = gc.MultiTriMeshToMultiPoint(multiTM, 3.0);
this.Text = "MultiTriMeshToMultiPoint完成。MultiPoint个数为：" + multiPoint.GeometryCount;
//创建RenderPoint在三维上显示
IRenderMultiPoint rpoint = this.axRenderControl1.ObjectManager.CreateRenderMultiPoint(multiPoint, null, rootId);
rPointList.Add(rpoint);
}
}
}
}
catch (System.Exception ex)
{
if (ex.GetType().Name.Equals("UnauthorizedAccessException"))
{
MessageBox.Show("需要标准runtime授权");
}
else
{
MessageBox.Show(ex.Message);
}
}
}