| public static ConstructVector3D ( double xComponent, double yComponent, double zComponent ) : IVector3D | ||
| xComponent | double | |
| yComponent | double | |
| zComponent | double | |
| return | IVector3D | |
public static IGeometry GetExample3()
{
const double DegreesOfRotation = 45;
//Transform3D: Cylinder Rotated Around An Axis Via RotateVector3D()
IGeometry geometry = Vector3DExamples.GetExample3();
//Construct A Vector3D Corresponding To The Desired Axis Of Rotation
IVector3D axisOfRotationVector3D = GeometryUtilities.ConstructVector3D(0, 10, 0);
//Obtain Angle Of Rotation In Radians
double angleOfRotationInRadians = GeometryUtilities.GetRadians(DegreesOfRotation);
ITransform3D transform3D = geometry as ITransform3D;
transform3D.RotateVector3D(axisOfRotationVector3D, angleOfRotationInRadians);
return(geometry);
}
public static IGeometry GetExample4()
{
const double XScale = 0.5;
const double YScale = 0.5;
const double ZScale = 2;
const double XOffset = -5;
const double YOffset = -5;
const double ZOffset = -8;
const double DegreesOfRotation = 90;
//Transform3D: Cylinder Scaled, Rotated, Repositioned Via Move3D(), Scale3D(), RotateVector3D()
IGeometry geometry = Vector3DExamples.GetExample3();
ITransform3D transform3D = geometry as ITransform3D;
//Stretch The Cylinder So It Looks Like A Tube
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
transform3D.Scale3D(originPoint, XScale, YScale, ZScale);
//Rotate The Cylinder So It Lies On Its Side
IVector3D axisOfRotationVector3D = GeometryUtilities.ConstructVector3D(0, 10, 0);
double angleOfRotationInRadians = GeometryUtilities.GetRadians(DegreesOfRotation);
transform3D.RotateVector3D(axisOfRotationVector3D, angleOfRotationInRadians);
//Reposition The Cylinder So It Is Located Underground
transform3D.Move3D(XOffset, YOffset, ZOffset);
return(geometry);
}
public static IGeometry GetExample5()
{
const double CylinderBaseDegrees = 360.0;
const int CylinderBaseDivisions = 8;
const double VectorComponentOffset = 0.0000001;
const double CylinderBaseRadius = 3;
const double CylinderUpperZ = 8;
const double CylinderLowerZ = 0;
//Vector3D: Cylinder, TriangleStrip With 8 Vertices
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleStripPointCollection = new TriangleStripClass();
//Set Cylinder Base Origin To (0, 0, 0)
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
//Define Upper Portion Of Axis Around Which Vector Should Be Rotated To Generate Cylinder Base Vertices
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
//Define Lower Portion of Axis Around Which Vector Should Be Rotated To Generate Cylinder Base Vertices
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
//Add A 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 Cylinder Base Vertices
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
//Set Normal Vector Magnitude Equal To Radius Of Cylinder Base
normalVector3D.Magnitude = CylinderBaseRadius;
//Obtain Angle Of Rotation In Radians As Function Of Number Of Divisions Within 360 Degree Sweep Of Cylinder Base
double rotationAngleInRadians = GeometryUtilities.GetRadians(CylinderBaseDegrees / CylinderBaseDivisions);
for (int i = 0; i < CylinderBaseDivisions; i++)
{
//Rotate Normal Vector Specified Rotation Angle In Radians Around Either Upper Or Lower Axis
normalVector3D.Rotate(rotationAngleInRadians, upperAxisVector3D);
//Construct Cylinder Base 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,
0);
//Construct Lower Base Vertex From This Point And Add To TriangleStrip
IPoint lowerVertexPoint = GeometryUtilities.ConstructPoint3D(vertexPoint.X, vertexPoint.Y, CylinderLowerZ);
triangleStripPointCollection.AddPoint(lowerVertexPoint, ref _missing, ref _missing);
//Construct Upper Base Vertex From This Point And Add To TriangleStrip
IPoint upperVertexPoint = GeometryUtilities.ConstructPoint3D(vertexPoint.X, vertexPoint.Y, CylinderUpperZ);
triangleStripPointCollection.AddPoint(upperVertexPoint, ref _missing, ref _missing);
}
//Re-Add The First And Second Points Of The Triangle Strip (First Two Vertices Added) To Close The Strip
triangleStripPointCollection.AddPoint(triangleStripPointCollection.get_Point(0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(triangleStripPointCollection.get_Point(1), ref _missing, ref _missing);
//Add TriangleStrip To MultiPatch
multiPatchGeometryCollection.AddGeometry(triangleStripPointCollection 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);
}
public static IGeometry GetExample4()
{
const double CircleDegrees = 360.0;
const int CircleDivisions = 18;
const double VectorComponentOffset = 0.0000001;
const double InnerBuildingRadius = 3.0;
const double OuterBuildingExteriorRingRadius = 9.0;
const double OuterBuildingInteriorRingRadius = 6.0;
const double BaseZ = 0.0;
const double InnerBuildingZ = 16.0;
const double OuterBuildingZ = 6.0;
//Composite: Tall Building Protruding Through Outer Ring-Shaped Building
IMultiPatch multiPatch = new MultiPatchClass();
IGeometryCollection multiPatchGeometryCollection = multiPatch as IGeometryCollection;
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
lowerAxisVector3D.XComponent += VectorComponentOffset;
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
double rotationAngleInRadians = GeometryUtilities.GetRadians(CircleDegrees / CircleDivisions);
//Inner Building
IGeometry innerBuildingBaseGeometry = new PolygonClass();
IPointCollection innerBuildingBasePointCollection = innerBuildingBaseGeometry as IPointCollection;
//Outer Building
IGeometry outerBuildingBaseGeometry = new PolygonClass();
IGeometryCollection outerBuildingBaseGeometryCollection = outerBuildingBaseGeometry as IGeometryCollection;
IPointCollection outerBuildingBaseExteriorRingPointCollection = new RingClass();
IPointCollection outerBuildingBaseInteriorRingPointCollection = new RingClass();
for (int i = 0; i < CircleDivisions; i++)
{
normalVector3D.Rotate(-1 * rotationAngleInRadians, upperAxisVector3D);
//Inner Building
normalVector3D.Magnitude = InnerBuildingRadius;
IPoint innerBuildingBaseVertexPoint = GeometryUtilities.ConstructPoint2D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent);
innerBuildingBasePointCollection.AddPoint(innerBuildingBaseVertexPoint, ref _missing, ref _missing);
//Outer Building
//Exterior Ring
normalVector3D.Magnitude = OuterBuildingExteriorRingRadius;
IPoint outerBuildingBaseExteriorRingVertexPoint = GeometryUtilities.ConstructPoint2D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent);
outerBuildingBaseExteriorRingPointCollection.AddPoint(outerBuildingBaseExteriorRingVertexPoint, ref _missing, ref _missing);
//Interior Ring
normalVector3D.Magnitude = OuterBuildingInteriorRingRadius;
IPoint outerBuildingBaseInteriorRingVertexPoint = GeometryUtilities.ConstructPoint2D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent);
outerBuildingBaseInteriorRingPointCollection.AddPoint(outerBuildingBaseInteriorRingVertexPoint, ref _missing, ref _missing);
}
IPolygon innerBuildingBasePolygon = innerBuildingBaseGeometry as IPolygon;
innerBuildingBasePolygon.Close();
IRing outerBuildingBaseExteriorRing = outerBuildingBaseExteriorRingPointCollection as IRing;
outerBuildingBaseExteriorRing.Close();
IRing outerBuildingBaseInteriorRing = outerBuildingBaseInteriorRingPointCollection as IRing;
outerBuildingBaseInteriorRing.Close();
outerBuildingBaseInteriorRing.ReverseOrientation();
outerBuildingBaseGeometryCollection.AddGeometry(outerBuildingBaseExteriorRing as IGeometry, ref _missing, ref _missing);
outerBuildingBaseGeometryCollection.AddGeometry(outerBuildingBaseInteriorRing as IGeometry, ref _missing, ref _missing);
ITopologicalOperator topologicalOperator = outerBuildingBaseGeometry as ITopologicalOperator;
topologicalOperator.Simplify();
IConstructMultiPatch innerBuildingConstructMultiPatch = new MultiPatchClass();
innerBuildingConstructMultiPatch.ConstructExtrudeFromTo(BaseZ, InnerBuildingZ, innerBuildingBaseGeometry);
IGeometryCollection innerBuildingMultiPatchGeometryCollection = innerBuildingConstructMultiPatch as IGeometryCollection;
for (int i = 0; i < innerBuildingMultiPatchGeometryCollection.GeometryCount; i++)
{
multiPatchGeometryCollection.AddGeometry(innerBuildingMultiPatchGeometryCollection.get_Geometry(i), ref _missing, ref _missing);
}
IConstructMultiPatch outerBuildingConstructMultiPatch = new MultiPatchClass();
outerBuildingConstructMultiPatch.ConstructExtrudeFromTo(BaseZ, OuterBuildingZ, outerBuildingBaseGeometry);
IMultiPatch outerBuildingMultiPatch = outerBuildingConstructMultiPatch as IMultiPatch;
IGeometryCollection outerBuildingMultiPatchGeometryCollection = outerBuildingConstructMultiPatch as IGeometryCollection;
for (int i = 0; i < outerBuildingMultiPatchGeometryCollection.GeometryCount; i++)
{
IGeometry outerBuildingPatchGeometry = outerBuildingMultiPatchGeometryCollection.get_Geometry(i);
multiPatchGeometryCollection.AddGeometry(outerBuildingPatchGeometry, ref _missing, ref _missing);
if (outerBuildingPatchGeometry.GeometryType == esriGeometryType.esriGeometryRing)
{
bool isBeginningRing = false;
esriMultiPatchRingType multiPatchRingType = outerBuildingMultiPatch.GetRingType(outerBuildingPatchGeometry as IRing, ref isBeginningRing);
multiPatch.PutRingType(outerBuildingPatchGeometry as IRing, multiPatchRingType);
}
}
return(multiPatchGeometryCollection as IGeometry);
}
public static void DrawAxes(IGraphicsContainer3D axesGraphicsContainer3D)
{
const esriSimple3DLineStyle AxisStyle = esriSimple3DLineStyle.esriS3DLSTube;
const double AxisWidth = 0.25;
DrawAxis(axesGraphicsContainer3D, GeometryUtilities.ConstructPoint3D(-10, 0, 0), GeometryUtilities.ConstructPoint3D(10, 0, 0), ColorUtilities.GetColor(255, 0, 0), AxisStyle, AxisWidth);
DrawAxis(axesGraphicsContainer3D, GeometryUtilities.ConstructPoint3D(0, -10, 0), GeometryUtilities.ConstructPoint3D(0, 10, 0), ColorUtilities.GetColor(0, 0, 255), AxisStyle, AxisWidth);
DrawAxis(axesGraphicsContainer3D, GeometryUtilities.ConstructPoint3D(0, 0, -10), GeometryUtilities.ConstructPoint3D(0, 0, 10), ColorUtilities.GetColor(0, 255, 0), AxisStyle, AxisWidth);
DrawEnd(axesGraphicsContainer3D, GeometryUtilities.ConstructPoint3D(10, 0, 0), GeometryUtilities.ConstructVector3D(0, 10, 0), 90, ColorUtilities.GetColor(255, 0, 0), 0.2 * AxisWidth);
DrawEnd(axesGraphicsContainer3D, GeometryUtilities.ConstructPoint3D(0, 10, 0), GeometryUtilities.ConstructVector3D(10, 0, 0), -90, ColorUtilities.GetColor(0, 0, 255), 0.2 * AxisWidth);
DrawEnd(axesGraphicsContainer3D, GeometryUtilities.ConstructPoint3D(0, 0, 10), null, 0, ColorUtilities.GetColor(0, 255, 0), 0.2 * AxisWidth);
}
public static IGeometry GetExample15()
{
const double CircleDegrees = 360.0;
const int CircleDivisions = 36;
const double VectorComponentOffset = 0.0000001;
const double CircleRadius = 9.5;
const int PointCount = 100;
const double UpperZMin = 7;
const double UpperZMax = 10;
const double LowerZMin = 0;
const double LowerZMax = 3;
//Extrusion: Circle Shaped Base Geometry Extruded Between Two Different TIN-Based Functional Surfaces
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
//Base Geometry
IPointCollection polygonPointCollection = new PolygonClass();
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
lowerAxisVector3D.XComponent += VectorComponentOffset;
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
normalVector3D.Magnitude = CircleRadius;
double rotationAngleInRadians = GeometryUtilities.GetRadians(CircleDegrees / CircleDivisions);
for (int i = 0; i < CircleDivisions; i++)
{
normalVector3D.Rotate(-1 * rotationAngleInRadians, upperAxisVector3D);
IPoint vertexPoint = GeometryUtilities.ConstructPoint2D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent);
polygonPointCollection.AddPoint(vertexPoint, ref _missing, ref _missing);
}
IPolygon polygon = polygonPointCollection as IPolygon;
polygon.Close();
IGeometry baseGeometry = polygon as IGeometry;
ITopologicalOperator topologicalOperator = polygon as ITopologicalOperator;
topologicalOperator.Simplify();
//Functional Surfaces
IEnvelope envelope = new EnvelopeClass();
envelope.XMin = -10;
envelope.XMax = 10;
envelope.YMin = -10;
envelope.YMax = 10;
Random random = new Random();
//Upper Functional Surface
ITinEdit upperTinEdit = new TinClass();
upperTinEdit.InitNew(envelope);
for (int i = 0; i < PointCount; i++)
{
double x = envelope.XMin + (envelope.XMax - envelope.XMin) * random.NextDouble();
double y = envelope.YMin + (envelope.YMax - envelope.YMin) * random.NextDouble();
double z = UpperZMin + (UpperZMax - UpperZMin) * random.NextDouble();
IPoint point = GeometryUtilities.ConstructPoint3D(x, y, z);
upperTinEdit.AddPointZ(point, 0);
}
IFunctionalSurface upperFunctionalSurface = upperTinEdit as IFunctionalSurface;
//Lower Functional Surface
ITinEdit lowerTinEdit = new TinClass();
lowerTinEdit.InitNew(envelope);
for (int i = 0; i < PointCount; i++)
{
double x = envelope.XMin + (envelope.XMax - envelope.XMin) * random.NextDouble();
double y = envelope.YMin + (envelope.YMax - envelope.YMin) * random.NextDouble();
double z = LowerZMin + (LowerZMax - LowerZMin) * random.NextDouble();
IPoint point = GeometryUtilities.ConstructPoint3D(x, y, z);
lowerTinEdit.AddPointZ(point, 0);
}
IFunctionalSurface lowerFunctionalSurface = lowerTinEdit as IFunctionalSurface;
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrudeBetween(upperFunctionalSurface, lowerFunctionalSurface, baseGeometry);
return(constructMultiPatch as IGeometry);
}
public static IGeometry GetExample13()
{
const double CircleDegrees = 360.0;
const int CircleDivisions = 36;
const double VectorComponentOffset = 0.0000001;
const double CircleRadius = 3.0;
const double BaseZ = 0.0;
const double RotationAngleInDegrees = 89.9;
//Extrusion: 3D Circle Polyline Extruded Along 3D Vector Via ConstructExtrudeRelative()
IPointCollection pathPointCollection = new PathClass();
IGeometry pathGeometry = pathPointCollection as IGeometry;
GeometryUtilities.MakeZAware(pathGeometry);
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
lowerAxisVector3D.XComponent += VectorComponentOffset;
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
normalVector3D.Magnitude = CircleRadius;
double rotationAngleInRadians = GeometryUtilities.GetRadians(CircleDegrees / CircleDivisions);
for (int i = 0; i < CircleDivisions; i++)
{
normalVector3D.Rotate(-1 * rotationAngleInRadians, upperAxisVector3D);
IPoint vertexPoint = GeometryUtilities.ConstructPoint3D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent,
BaseZ);
pathPointCollection.AddPoint(vertexPoint, ref _missing, ref _missing);
}
pathPointCollection.AddPoint(pathPointCollection.get_Point(0), ref _missing, ref _missing);
//Rotate Geometry
IVector3D rotationAxisVector3D = GeometryUtilities.ConstructVector3D(0, 10, 0);
ITransform3D transform3D = pathGeometry as ITransform3D;
transform3D.RotateVector3D(rotationAxisVector3D, GeometryUtilities.GetRadians(RotationAngleInDegrees));
//Construct Polyline From Path Vertices
IGeometry polylineGeometry = new PolylineClass();
GeometryUtilities.MakeZAware(polylineGeometry);
IPointCollection polylinePointCollection = polylineGeometry as IPointCollection;
for (int i = 0; i < pathPointCollection.PointCount; i++)
{
polylinePointCollection.AddPoint(pathPointCollection.get_Point(i), ref _missing, ref _missing);
}
ITopologicalOperator topologicalOperator = polylineGeometry as ITopologicalOperator;
topologicalOperator.Simplify();
//Define Vector To Extrude Along
IVector3D extrusionVector3D = GeometryUtilities.ConstructVector3D(10, 0, 5);
//Perform Extrusion
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrudeRelative(extrusionVector3D, polylineGeometry);
return(constructMultiPatch as IGeometry);
}
public static IGeometry GetExample11()
{
const double CircleDegrees = 360.0;
const int CircleDivisions = 36;
const double VectorComponentOffset = 0.0000001;
const double CircleRadius = 3.0;
const double BaseZ = 0.0;
//Extrusion: 3D Circle Polyline Extruded Along 3D Line Via ConstructExtrudeAlongLine()
IPointCollection polylinePointCollection = new PolylineClass();
IGeometry polylineGeometry = polylinePointCollection as IGeometry;
GeometryUtilities.MakeZAware(polylineGeometry);
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
lowerAxisVector3D.XComponent += VectorComponentOffset;
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
normalVector3D.Magnitude = CircleRadius;
double rotationAngleInRadians = GeometryUtilities.GetRadians(CircleDegrees / CircleDivisions);
for (int i = 0; i < CircleDivisions; i++)
{
normalVector3D.Rotate(-1 * rotationAngleInRadians, upperAxisVector3D);
IPoint vertexPoint = GeometryUtilities.ConstructPoint3D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent,
BaseZ);
polylinePointCollection.AddPoint(vertexPoint, ref _missing, ref _missing);
}
polylinePointCollection.AddPoint(polylinePointCollection.get_Point(0), ref _missing, ref _missing);
ITopologicalOperator topologicalOperator = polylineGeometry as ITopologicalOperator;
topologicalOperator.Simplify();
//Define Line To Extrude Along
ILine extrusionLine = new LineClass();
extrusionLine.FromPoint = GeometryUtilities.ConstructPoint3D(-4, -4, -5);
extrusionLine.ToPoint = GeometryUtilities.ConstructPoint3D(4, 4, 5);
//Perform Extrusion
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrudeAlongLine(extrusionLine, polylineGeometry);
//Transform Extrusion Result
IPoint centroid = GeometryUtilities.ConstructPoint2D(0.5 * (polylineGeometry.Envelope.XMax + polylineGeometry.Envelope.XMin),
0.5 * (polylineGeometry.Envelope.YMax + polylineGeometry.Envelope.YMin));
ITransform2D transform2D = constructMultiPatch as ITransform2D;
transform2D.Move(extrusionLine.FromPoint.X - centroid.X, extrusionLine.FromPoint.Y - centroid.Y);
return(constructMultiPatch as IGeometry);
}
public static IGeometry GetExample8()
{
const double CircleDegrees = 360.0;
const int CircleDivisions = 36;
const double VectorComponentOffset = 0.0000001;
const double CircleRadius = 3.0;
const double BaseZ = -10;
const double OffsetZ = 5;
//Extrusion: 3D Circle Polygon Having Vertices With Varying Z Values, Extruded Relative To Existing
// Vertex Z Values Via ConstructExtrude()
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection polygonPointCollection = new PolygonClass();
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
IVector3D upperAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, 10);
IVector3D lowerAxisVector3D = GeometryUtilities.ConstructVector3D(0, 0, -10);
lowerAxisVector3D.XComponent += VectorComponentOffset;
IVector3D normalVector3D = upperAxisVector3D.CrossProduct(lowerAxisVector3D) as IVector3D;
normalVector3D.Magnitude = CircleRadius;
double rotationAngleInRadians = GeometryUtilities.GetRadians(CircleDegrees / CircleDivisions);
Random random = new Random();
for (int i = 0; i < CircleDivisions; i++)
{
normalVector3D.Rotate(-1 * rotationAngleInRadians, upperAxisVector3D);
IPoint vertexPoint = GeometryUtilities.ConstructPoint3D(originPoint.X + normalVector3D.XComponent,
originPoint.Y + normalVector3D.YComponent,
BaseZ + 2 * Math.Sin(random.NextDouble()));
polygonPointCollection.AddPoint(vertexPoint, ref _missing, ref _missing);
}
IPolygon polygon = polygonPointCollection as IPolygon;
polygon.Close();
IGeometry polygonGeometry = polygon as IGeometry;
GeometryUtilities.MakeZAware(polygonGeometry);
ITopologicalOperator topologicalOperator = polygon as ITopologicalOperator;
topologicalOperator.Simplify();
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrude(OffsetZ, polygonGeometry);
return(constructMultiPatch as IGeometry);
}