public MultiPatchConstruction StartFan(IPoint p)
{
EndPatch();
object missing = Type.Missing;
IPointCollection newFan = new TriangleFanClass();
newFan.AddPoint(p, ref missing, ref missing);
_currentPatch = (IGeometry)newFan;
return(this);
}
public static IGeometry GetExample4()
{
//TriangleFan: Triangle Based Pyramid
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 6), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample2()
{
//TriangleFan: Upright Square
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, 5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, 5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, -5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample3()
{
//TriangleFan: Square Based Pyramid
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 7), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample3()
{
//TriangleFan: Square Based Pyramid
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 7), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return multiPatchGeometryCollection as IGeometry;
}
public static IGeometry GetExample1()
{
//TriangleFan: Square Lying On XY Plane, Z < 0
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, -5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample2()
{
//TriangleFan: Upright Square
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, 5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, 5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, -5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return multiPatchGeometryCollection as IGeometry;
}
public static IGeometry GetExample1()
{
//TriangleFan: Square Lying On XY Plane, Z < 0
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, -5), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, -5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return multiPatchGeometryCollection as IGeometry;
}
public static IGeometry GetExample6()
{
//TriangleFan: Partial Fan, Two Levels Of Zs
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -6, 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), -3 * Math.Sqrt(2), 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 0, 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), 3 * Math.Sqrt(2), 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(2), 3 * Math.Sqrt(2), 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 0, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample1()
{
const double CircleDegrees = 360.0;
const int CircleDivisions = 36;
const double VectorComponentOffset = 0.0000001;
const double CircleRadius = 5.0;
const double CircleZ = 0.0;
//Vector3D: Circle, TriangleFan With 36 Vertices
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
//Set Circle Origin To (0, 0, CircleZ)
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, CircleZ);
//Add Origin Point To Triangle Fan
triangleFanPointCollection.AddPoint(originPoint, ref _missing, ref _missing);
//Define Upper Portion Of Axis Around Which Vector Should Be Rotated To Generate Circle Vertices
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
//Define Lower Portion of Axis Around Which Vector Should Be Rotated To Generate Circle Vertices
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
//Add Slight Offset To X or Y Component Of One Of Axis Vectors So Cross Product Does Not Return A Zero-Length Vector
lowerAxisVector3D.XComponent += VectorComponentOffset;
//Obtain Cross Product Of Upper And Lower Axis Vectors To Obtain Normal Vector To Axis Of Rotation To Generate Circle Vertices
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
//Set Normal Vector Magnitude Equal To Radius Of Circle
normalVector3D.Magnitude = CircleRadius;
//Obtain Angle Of Rotation In Radians As Function Of Number Of Divisions Within 360 Degree Sweep Of Circle
double rotationAngleInRadians = GeometryUtilities.GetRadians(CircleDegrees / CircleDivisions);
for (int i = 0; i < CircleDivisions; i++)
{
//Rotate Normal Vector Specified Rotation Angle In Radians Around Either Upper Or Lower Axis
normalVector3D.Rotate(-1 * rotationAngleInRadians, upperAxisVector3D);
//Construct Circle Vertex Whose XY Coordinates Are The Sum Of Origin XY Coordinates And Normal Vector XY Components
IPoint vertexPoint = GeometryUtilities.ConstructPoint3D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent,
CircleZ);
//Add Vertex To TriangleFan
triangleFanPointCollection.AddPoint(vertexPoint, ref _missing, ref _missing);
}
//Re-Add The Second Point Of The Triangle Fan (First Vertex Added) To Close The Fan
triangleFanPointCollection.AddPoint(triangleFanPointCollection.get_Point(1), ref _missing, ref _missing);
//Add TriangleFan To MultiPatch
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
/// <summary>
/// 生成可视与不可视域的多面体 张琪 20110621
/// </summary>
/// <param name="bIsVis">是否可视</param>
/// <param name="pObsPt">观察点</param>
/// <param name="pTarPt">目标点</param>
/// <param name="pVisLine">可视线要素</param>
/// <param name="pInVisLine">不可视线要素</param>
/// <param name="pVisPatch">可视多面体</param>
/// <param name="pInVisPatch">不可视多面体</param>
/// <param name="dTargetHeight"></param>
public void CreateVerticalLOSPatches(bool bIsVis, ESRI.ArcGIS.Geometry.IPoint pObsPt, ESRI.ArcGIS.Geometry.IPoint pTarPt, IPolyline pVisLine, IPolyline pInVisLine, IGeometryCollection pVisPatch, IGeometryCollection pInVisPatch, double dTargetHeight)
{
IGeometryCollection pGeomColl = pVisLine as IGeometryCollection; //存储可视域线要素
IMultiPatch pVisMPatch = pVisPatch as IMultiPatch;
IMultiPatch pInVisMPatch = pInVisPatch as IMultiPatch; //生成不可视域要素
dTargetHeight = pTarPt.Z;
double dist1 = 0;
double dist2;
IPointCollection pPc;
IClone pClone;
ESRI.ArcGIS.Geometry.IPoint pLastVisPoint = null;
IPointCollection pVisFan = new TriangleFanClass();//用于存储可视域多面体要素
object before = Type.Missing;
object after = Type.Missing;
for (int i = 0; i < pGeomColl.GeometryCount; i++)//遍历可视域线要素
{
pPc = pGeomColl.get_Geometry(i) as IPointCollection;
if (i == 0)//当为第一个可视域线要素是先要存储观察点要素
{
pClone = pObsPt as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pClone = pPc.get_Point(0) as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
ESRI.ArcGIS.Geometry.IPoint pStartPoint = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
}
pClone = pPc as IClone;
pVisFan.AddPointCollection(pClone.Clone() as IPointCollection); //将可视域线要素的点集合存储于pVisFan中
if (i == pGeomColl.GeometryCount - 1) //当为可视域最后一个线要素时
{
IVector3D pV = new Vector3DClass();
ESRI.ArcGIS.Geometry.IPoint p1;
pClone = pObsPt as IClone;
p1 = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p1.Z = 0;
ESRI.ArcGIS.Geometry.IPoint p2;
pClone = pPc.get_Point(pPc.PointCount - 1) as IClone;
p2 = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p2.Z = 0;
pV.ConstructDifference(p1, p2);
dist1 = pV.Magnitude;
pLastVisPoint = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
if (pInVisLine == null)
{
if (pTarPt.Z > pPc.get_Point(pPc.PointCount - 1).Z)//当被观察点高程高于最后一点要素时则到被观点都是可视的
{
pClone = pTarPt as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
}
}
}
pVisPatch.AddGeometry(pVisFan as IGeometry, ref before, ref after); //根据获得的点要素集生成TriangleFanClass
}
if (pInVisLine != null) //当不可视域的线要素不为空时
{
pGeomColl = pInVisLine as IGeometryCollection;
IPointCollection pInVisRing = new RingClass();//用于存储不可视域点要素集并生成RingClass
for (int i = 0; i < pGeomColl.GeometryCount; i++)
{
pPc = pGeomColl.get_Geometry(i) as IPointCollection;
pClone = pPc.get_Point(0) as IClone;
pInVisRing.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pClone = pPc as IClone;
pInVisRing.AddPointCollection(pClone.Clone() as IPointCollection);
if (i == pGeomColl.GeometryCount - 1)
{
IVector3D pV = new Vector3DClass();
pClone = pObsPt as IClone;
ESRI.ArcGIS.Geometry.IPoint p1 = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p1.Z = 0;
pClone = pPc.get_Point(pPc.PointCount - 1) as IClone;
ESRI.ArcGIS.Geometry.IPoint p2 = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p2.Z = 0;
pV.ConstructDifference(p1, p2);
dist2 = pV.Magnitude;
if (dist1 < dist2)
{
pClone = pObsPt as IClone;
p1 = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p1.Z = 0;
pClone = pPc.get_Point(0) as IClone;
p2 = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p2.Z = 0;
pV.ConstructDifference(p1, p2);
double theDist1;
theDist1 = pV.Magnitude;
double slope = (pObsPt.Z - pPc.get_Point(0).Z) / theDist1;
pClone = pPc.get_Point(pPc.PointCount - 1) as IClone;
ESRI.ArcGIS.Geometry.IPoint pEndPoint = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p2 = pClone.Clone() as ESRI.ArcGIS.Geometry.IPoint;
p2.Z = 0;
pV.ConstructDifference(p1, p2);
double theDist2 = pV.Magnitude;
double deltaZ = theDist2 * slope;
double theHeight = pObsPt.Z - deltaZ;
pEndPoint.Z = theHeight;
pClone = pEndPoint as IClone;
pInVisRing.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
if (bIsVis)//为True时说明不可视域线要素空间范围内存在可视区域
{
pVisFan = new TriangleFanClass();
pClone = pObsPt as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pClone = pTarPt as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pVisPatch.AddGeometry(pVisFan as IGeometry, ref before, ref after);
}
else
{
dTargetHeight = pEndPoint.Z;
}
}
else
{
if (bIsVis)
{
if (pTarPt.Z > pLastVisPoint.Z)
{
pVisFan = new TriangleFanClass();
pClone = pObsPt as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pClone = pTarPt as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pClone = pLastVisPoint as IClone;
pVisFan.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pVisPatch.AddGeometry(pVisFan as IGeometry, ref before, ref after);
}
}
}
}
pClone = pPc.get_Point(0) as IClone;
pInVisRing.AddPoint(pClone.Clone() as IPoint, ref before, ref after);
pInVisPatch.AddGeometry(pInVisRing as IGeometry, ref before, ref after);//获取每段不可视域线要素点集合并生成RingClass
pInVisMPatch.PutRingType(pInVisRing as IRing, esriMultiPatchRingType.esriMultiPatchRing);
}
}
}
public static IGeometry GetExample1()
{
const double CircleDegrees = 360.0;
const int CircleDivisions = 36;
const double VectorComponentOffset = 0.0000001;
const double CircleRadius = 5.0;
const double CircleZ = 0.0;
//Vector3D: Circle, TriangleFan With 36 Vertices
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
//Set Circle Origin To (0, 0, CircleZ)
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, CircleZ);
//Add Origin Point To Triangle Fan
triangleFanPointCollection.AddPoint(originPoint, ref _missing, ref _missing);
//Define Upper Portion Of Axis Around Which Vector Should Be Rotated To Generate Circle Vertices
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
//Define Lower Portion of Axis Around Which Vector Should Be Rotated To Generate Circle Vertices
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
//Add Slight Offset To X or Y Component Of One Of Axis Vectors So Cross Product Does Not Return A Zero-Length Vector
lowerAxisVector3D.XComponent += VectorComponentOffset;
//Obtain Cross Product Of Upper And Lower Axis Vectors To Obtain Normal Vector To Axis Of Rotation To Generate Circle Vertices
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
//Set Normal Vector Magnitude Equal To Radius Of Circle
normalVector3D.Magnitude = CircleRadius;
//Obtain Angle Of Rotation In Radians As Function Of Number Of Divisions Within 360 Degree Sweep Of Circle
double rotationAngleInRadians = GeometryUtilities.GetRadians(CircleDegrees / CircleDivisions);
for (int i = 0; i < CircleDivisions; i++)
{
//Rotate Normal Vector Specified Rotation Angle In Radians Around Either Upper Or Lower Axis
normalVector3D.Rotate(-1 * rotationAngleInRadians, upperAxisVector3D);
//Construct Circle Vertex Whose XY Coordinates Are The Sum Of Origin XY Coordinates And Normal Vector XY Components
IPoint vertexPoint = GeometryUtilities.ConstructPoint3D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent,
CircleZ);
//Add Vertex To TriangleFan
triangleFanPointCollection.AddPoint(vertexPoint, ref _missing, ref _missing);
}
//Re-Add The Second Point Of The Triangle Fan (First Vertex Added) To Close The Fan
triangleFanPointCollection.AddPoint(triangleFanPointCollection.get_Point(1), ref _missing, ref _missing);
//Add TriangleFan To MultiPatch
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return multiPatchGeometryCollection as IGeometry;
}
public static IGeometry GetExample4()
{
//TriangleFan: Triangle Based Pyramid
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 6), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(3), -3, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return multiPatchGeometryCollection as IGeometry;
}
public static IGeometry GetExample6()
{
//TriangleFan: Partial Fan, Two Levels Of Zs
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleFanPointCollection = new TriangleFanClass();
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -6, 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), -3 * Math.Sqrt(2), 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 0, 3), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3 * Math.Sqrt(2), 3 * Math.Sqrt(2), 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 6, 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3 * Math.Sqrt(2), 3 * Math.Sqrt(2), 0), ref _missing, ref _missing);
triangleFanPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 0, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleFanPointCollection as IGeometry, ref _missing, ref _missing);
return multiPatchGeometryCollection as IGeometry;
}
