public static IGeometry GetExample3()
{
//Triangles: Three Upright Triangles
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection trianglesPointCollection = new TrianglesClass();
//Triangle 1
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, 2.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, 2.5, 7.5), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 2.5, 7.5), ref _missing, ref _missing);
//Triangle 2
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 2.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 2.5, 7.5), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-2.5, 2.5, 7.5), ref _missing, ref _missing);
//Triangle 3
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-2.5, -2.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-2.5, -2.5, 7.5), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, -2.5, 7.5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(trianglesPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample2()
{
const double FromZ = -0.1;
const double ToZ = -8;
//Extrusion: Multiple Point 2D Polyline Extruded To Generate 3D Wall Via ConstructExtrudeFromTo()
IPointCollection polylinePointCollection = new PolylineClass();
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(-10, -10), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(-8, -7), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(-5, -5), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(-3, -2), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(0, 0), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(3, 2), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(5, 5), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(8, 7), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(10, 10), ref _missing, ref _missing);
IGeometry polylineGeometry = polylinePointCollection as IGeometry;
ITopologicalOperator topologicalOperator = polylineGeometry as ITopologicalOperator;
topologicalOperator.Simplify();
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrudeFromTo(FromZ, ToZ, polylineGeometry);
return(constructMultiPatch as IGeometry);
}
public static IGeometry GetExample3()
{
const double FromZ = 0;
const double ToZ = 9.5;
//Extrusion: Square Shaped 2D Polygon Extruded To Generate 3D Building Via ConstructExtrudeFromTo()
IPointCollection polygonPointCollection = new PolygonClass();
polygonPointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(-2, 2), ref _missing, ref _missing);
polygonPointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(2, 2), ref _missing, ref _missing);
polygonPointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(2, -2), ref _missing, ref _missing);
polygonPointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(-2, -2), ref _missing, ref _missing);
IPolygon polygon = polygonPointCollection as IPolygon;
polygon.Close();
IGeometry polygonGeometry = polygonPointCollection as IGeometry;
ITopologicalOperator topologicalOperator = polygonGeometry as ITopologicalOperator;
topologicalOperator.Simplify();
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrudeFromTo(FromZ, ToZ, polygonGeometry);
return(constructMultiPatch as IGeometry);
}
public static IGeometry GetExample4()
{
//Ring: Maze Lying On XY Plane
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection ringPointCollection = new RingClass();
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-10, 10, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 10, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, -10, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-10, -10, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-10, 6, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 2, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 2, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 2, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, 0, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, -4, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, -4, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, 4, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-8, 4, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-8, -8, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(8, -8, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(8, 8, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-10, 8, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-10, 10, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(ringPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample2()
{
//TriangleStrip: Multi-Paneled Vertical Plane
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleStripPointCollection = new TriangleStripClass();
//Panel 1
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 7.5, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 7.5, 7.5), ref _missing, ref _missing);
//Panel 2
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-2.5, 2.5, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-2.5, 2.5, 7.5), ref _missing, ref _missing);
//Panel 3
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, -2.5, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, -2.5, 7.5), ref _missing, ref _missing);
//Panel 4
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, -7.5, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, -7.5, 7.5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleStripPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample5()
{
//TriangleStrip: Star Shaped Box Without Top or Bottom
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleStripPointCollection = new TriangleStripClass();
//Start
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 2, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 2, 5), ref _missing, ref _missing);
//First Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1 * Math.Sqrt(10), Math.Sqrt(10), 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1 * Math.Sqrt(10), Math.Sqrt(10), 5), ref _missing, ref _missing);
//Second Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-2, 0, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-2, 0, 5), ref _missing, ref _missing);
//Third Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1 * Math.Sqrt(10), -1 * Math.Sqrt(10), 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1 * Math.Sqrt(10), -1 * Math.Sqrt(10), 5), ref _missing, ref _missing);
//Fourth Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -2, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -2, 5), ref _missing, ref _missing);
//Fifth Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(Math.Sqrt(10), -1 * Math.Sqrt(10), 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(Math.Sqrt(10), -1 * Math.Sqrt(10), 5), ref _missing, ref _missing);
//Sixth Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2, 0, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2, 0, 5), ref _missing, ref _missing);
//Seventh Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(Math.Sqrt(10), Math.Sqrt(10), 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(Math.Sqrt(10), Math.Sqrt(10), 5), ref _missing, ref _missing);
//End, To Close Box
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 2, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 2, 5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleStripPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample5()
{
const int XRange = 16;
const int YRange = 16;
const int InteriorRingCount = 25;
const double HoleRange = 0.5;
//RingGroup: Square Lying In XY Plane With Single Exterior Ring And Multiple Interior Rings
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IMultiPatch multiPatch = multiPatchGeometryCollection as IMultiPatch;
//Exterior Ring
IPointCollection exteriorRingPointCollection = new RingClass();
exteriorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0.5 * (XRange + 2), -0.5 * (YRange + 2), 0), ref _missing, ref _missing);
exteriorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-0.5 * (XRange + 2), -0.5 * (YRange + 2), 0), ref _missing, ref _missing);
exteriorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-0.5 * (XRange + 2), 0.5 * (YRange + 2), 0), ref _missing, ref _missing);
exteriorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0.5 * (XRange + 2), 0.5 * (YRange + 2), 0), ref _missing, ref _missing);
IRing exteriorRing = exteriorRingPointCollection as IRing;
exteriorRing.Close();
multiPatchGeometryCollection.AddGeometry(exteriorRing as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(exteriorRing, esriMultiPatchRingType.esriMultiPatchOuterRing);
//Interior Rings
Random random = new Random();
for (int i = 0; i < InteriorRingCount; i++)
{
double interiorRingOriginX = XRange * (random.NextDouble() - 0.5);
double interiorRingOriginY = YRange * (random.NextDouble() - 0.5);
IPointCollection interiorRingPointCollection = new RingClass();
interiorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(interiorRingOriginX - 0.5 * HoleRange, interiorRingOriginY - 0.5 * HoleRange, 0), ref _missing, ref _missing);
interiorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(interiorRingOriginX + 0.5 * HoleRange, interiorRingOriginY - 0.5 * HoleRange, 0), ref _missing, ref _missing);
interiorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(interiorRingOriginX + 0.5 * HoleRange, interiorRingOriginY + 0.5 * HoleRange, 0), ref _missing, ref _missing);
interiorRingPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(interiorRingOriginX - 0.5 * HoleRange, interiorRingOriginY + 0.5 * HoleRange, 0), ref _missing, ref _missing);
IRing interiorRing = interiorRingPointCollection as IRing;
interiorRing.Close();
multiPatchGeometryCollection.AddGeometry(interiorRing as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(interiorRing, esriMultiPatchRingType.esriMultiPatchInnerRing);
}
return(multiPatchGeometryCollection as IGeometry);
}
private static void DrawAxis(IGraphicsContainer3D axesGraphicsContainer3D, IPoint axisFromPoint, IPoint axisToPoint, IColor axisColor, esriSimple3DLineStyle axisStyle, double axisWidth)
{
IPointCollection axisPointCollection = new PolylineClass();
axisPointCollection.AddPoint(axisFromPoint, ref _missing, ref _missing);
axisPointCollection.AddPoint(axisToPoint, ref _missing, ref _missing);
GeometryUtilities.MakeZAware(axisPointCollection as IGeometry);
GraphicsLayer3DUtilities.AddAxisToGraphicsLayer3D(axesGraphicsContainer3D, axisPointCollection as IGeometry, axisColor, axisStyle, axisWidth);
}
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 GetExample3()
{
//TriangleStrip: Stairs
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleStripPointCollection = new TriangleStripClass();
//First Step
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 10, 10), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 10, 10), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 7.5, 10), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 7.5, 10), ref _missing, ref _missing);
//Second Step
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 7.5, 7.5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 7.5, 7.5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 5, 7.5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 5, 7.5), ref _missing, ref _missing);
//Third Step
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 5, 5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 5, 5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 2.5, 5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 2.5, 5), ref _missing, ref _missing);
//Fourth Step
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 2.5, 2.5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 2.5, 2.5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 2.5), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 0, 2.5), ref _missing, ref _missing);
//End
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 0, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleStripPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample14()
{
const int PointCount = 100;
const double ZMin = 0;
const double ZMax = 4;
//Extrusion: Square Shaped Base Geometry Extruded Between Single TIN-Based Functional Surface
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
//Base Geometry
IEnvelope envelope = new EnvelopeClass();
envelope.XMin = -10;
envelope.XMax = 10;
envelope.YMin = -10;
envelope.YMax = 10;
IGeometry baseGeometry = envelope as IGeometry;
//Upper Functional Surface
ITinEdit tinEdit = new TinClass();
tinEdit.InitNew(envelope);
Random random = new Random();
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 = ZMin + (ZMax - ZMin) * random.NextDouble();
IPoint point = GeometryUtilities.ConstructPoint3D(x, y, z);
tinEdit.AddPointZ(point, 0);
}
IFunctionalSurface functionalSurface = tinEdit as IFunctionalSurface;
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrudeBetween(functionalSurface, functionalSurface, baseGeometry);
return(constructMultiPatch as IGeometry);
}
public static IGeometry GetExample4()
{
//Triangles: Six Triangles Lying In Different Planes
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection trianglesPointCollection = new TrianglesClass();
//Triangle 1
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, 7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 5, 0), ref _missing, ref _missing);
//Triangle 2
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 5, 0), ref _missing, ref _missing);
//Triangle 3
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, -5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -7.5, 0), ref _missing, ref _missing);
//Triangle 4
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 7.5, 2.5), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, 7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 7.5, 0), ref _missing, ref _missing);
//Triangle 5
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, -7.5, 2.5), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, -7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, -7.5, 0), ref _missing, ref _missing);
//Triangle 6
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, -7.5, 2.5), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(10, -7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, -7.5, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(trianglesPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample1()
{
//Triangles: One Triangle Lying On XY Plane
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection trianglesPointCollection = new TrianglesClass();
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(2.5, 2.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 7.5, 0), ref _missing, ref _missing);
trianglesPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 2.5, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(trianglesPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample1()
{
//TriangleStrip: Square Lying On XY Plane
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleStripPointCollection = new TriangleStripClass();
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, -6, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-6, 6, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, -6, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(6, 6, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleStripPointCollection 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 GetExample1()
{
//Ring: Upright Rectangle
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection ringPointCollection = new RingClass();
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 0, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 0, 7.5), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 0, 7.5), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 0, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 0, 0), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(ringPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
public static IGeometry GetExample9()
{
const int DensificationDivisions = 20;
const double MaxDeviation = 0.1;
const double BaseZ = 0;
const double OffsetZ = -7;
//Extrusion: 3D Polyline Having Vertices With Varying Z Values, Extruded Relative To Existing
// Vertex Z Values Via ConstructExtrude()
IPointCollection polylinePointCollection = new PolylineClass();
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(-10, -10), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(0, -5), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(0, 5), ref _missing, ref _missing);
polylinePointCollection.AddPoint(GeometryUtilities.ConstructPoint2D(10, 10), ref _missing, ref _missing);
IPolyline polyline = polylinePointCollection as IPolyline;
polyline.Densify(polyline.Length / DensificationDivisions, MaxDeviation);
IGeometry polylineGeometry = polyline as IGeometry;
GeometryUtilities.MakeZAware(polylineGeometry);
Random random = new Random();
for (int i = 0; i < polylinePointCollection.PointCount; i++)
{
IPoint polylinePoint = polylinePointCollection.get_Point(i);
polylinePointCollection.UpdatePoint(i, GeometryUtilities.ConstructPoint3D(polylinePoint.X, polylinePoint.Y, BaseZ - 2 * Math.Sin(random.NextDouble())));
}
ITopologicalOperator topologicalOperator = polylineGeometry as ITopologicalOperator;
topologicalOperator.Simplify();
IConstructMultiPatch constructMultiPatch = new MultiPatchClass();
constructMultiPatch.ConstructExtrude(OffsetZ, polylineGeometry);
return(constructMultiPatch as IGeometry);
}
public static IGeometry GetExample3()
{
//RingGroup: Upright Square With Hole
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IMultiPatch multiPatch = multiPatchGeometryCollection as IMultiPatch;
//Exterior Ring 1
IPointCollection exteriorRing1PointCollection = new RingClass();
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, -5), ref _missing, ref _missing);
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, -5), ref _missing, ref _missing);
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-5, 0, 5), ref _missing, ref _missing);
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, 5), ref _missing, ref _missing);
IRing exteriorRing1 = exteriorRing1PointCollection as IRing;
exteriorRing1.Close();
multiPatchGeometryCollection.AddGeometry(exteriorRing1 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(exteriorRing1, esriMultiPatchRingType.esriMultiPatchOuterRing);
//Interior Ring 1
IPointCollection interiorRing1PointCollection = new RingClass();
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, 0, -4), ref _missing, ref _missing);
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, 0, -4), ref _missing, ref _missing);
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, 0, 4), ref _missing, ref _missing);
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, 0, 4), ref _missing, ref _missing);
IRing interiorRing1 = interiorRing1PointCollection as IRing;
interiorRing1.Close();
multiPatchGeometryCollection.AddGeometry(interiorRing1 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(interiorRing1, esriMultiPatchRingType.esriMultiPatchInnerRing);
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 GetExample2()
{
const double XScale = 2;
const double YScale = 2;
const double ZScale = 3;
//Transform3D: Cylinder Scaled Via Scale3D()
IGeometry geometry = Vector3DExamples.GetExample3();
//Define Origin At Which Scale Operation Should Be Performed
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
ITransform3D transform3D = geometry as ITransform3D;
transform3D.Scale3D(originPoint, XScale, YScale, ZScale);
return(geometry);
}
private static void DrawEnd(IGraphicsContainer3D endGraphicsContainer3D, IPoint endPoint, IVector3D axisOfRotationVector3D, double degreesOfRotation, IColor endColor, double endRadius)
{
IGeometry endGeometry = Vector3DExamples.GetExample2();
ITransform3D transform3D = endGeometry as ITransform3D;
IPoint originPoint = GeometryUtilities.ConstructPoint3D(0, 0, 0);
transform3D.Scale3D(originPoint, endRadius, endRadius, 2 * endRadius);
if (degreesOfRotation != 0)
{
double angleOfRotationInRadians = GeometryUtilities.GetRadians(degreesOfRotation);
transform3D.RotateVector3D(axisOfRotationVector3D, angleOfRotationInRadians);
}
transform3D.Move3D(endPoint.X - originPoint.X, endPoint.Y - originPoint.Y, endPoint.Z - originPoint.Z);
GraphicsLayer3DUtilities.AddMultiPatchToGraphicsLayer3D(endGraphicsContainer3D, endGeometry, endColor);
}
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 GetExample3()
{
//Ring: Octagon With Non-Coplanar Points
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection ringPointCollection = new RingClass();
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 7.5, 5), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 8.5, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, 7.5, 5), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(8.5, 0, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(7.5, -7.5, 5), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, -8.5, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, -7.5, 5), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-8.5, 0, 0), ref _missing, ref _missing);
ringPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-7.5, 7.5, 5), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(ringPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
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()
{
//TriangleStrip: Box Without Top or Bottom
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IPointCollection triangleStripPointCollection = new TriangleStripClass();
//Start
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 10), ref _missing, ref _missing);
//First Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 0, 10), ref _missing, ref _missing);
//Second Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 5, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(5, 5, 10), ref _missing, ref _missing);
//Third Panel
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 5, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 5, 10), ref _missing, ref _missing);
//End, To Close Box
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 0), ref _missing, ref _missing);
triangleStripPointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(0, 0, 10), ref _missing, ref _missing);
multiPatchGeometryCollection.AddGeometry(triangleStripPointCollection as IGeometry, ref _missing, ref _missing);
return(multiPatchGeometryCollection as IGeometry);
}
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 GetExample2()
{
//RingGroup: Multiple Exterior Rings With Corresponding Interior Rings
IGeometryCollection multiPatchGeometryCollection = new MultiPatchClass();
IMultiPatch multiPatch = multiPatchGeometryCollection as IMultiPatch;
//Exterior Ring 1
IPointCollection exteriorRing1PointCollection = new RingClass();
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1, 1, 0), ref _missing, ref _missing);
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1, 4, 0), ref _missing, ref _missing);
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, 4, 0), ref _missing, ref _missing);
exteriorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, 1, 0), ref _missing, ref _missing);
IRing exteriorRing1 = exteriorRing1PointCollection as IRing;
exteriorRing1.Close();
multiPatchGeometryCollection.AddGeometry(exteriorRing1 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(exteriorRing1, esriMultiPatchRingType.esriMultiPatchOuterRing);
//Interior Ring 1
IPointCollection interiorRing1PointCollection = new RingClass();
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3.5, 1.5, 0), ref _missing, ref _missing);
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3.5, 3.5, 0), ref _missing, ref _missing);
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1.5, 3.5, 0), ref _missing, ref _missing);
interiorRing1PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1.5, 1.5, 0), ref _missing, ref _missing);
IRing interiorRing1 = interiorRing1PointCollection as IRing;
interiorRing1.Close();
multiPatchGeometryCollection.AddGeometry(interiorRing1 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(interiorRing1, esriMultiPatchRingType.esriMultiPatchInnerRing);
//Exterior Ring 2
IPointCollection exteriorRing2PointCollection = new RingClass();
exteriorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1, -1, 0), ref _missing, ref _missing);
exteriorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, -1, 0), ref _missing, ref _missing);
exteriorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(4, -4, 0), ref _missing, ref _missing);
exteriorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1, -4, 0), ref _missing, ref _missing);
IRing exteriorRing2 = exteriorRing2PointCollection as IRing;
exteriorRing2.Close();
multiPatchGeometryCollection.AddGeometry(exteriorRing2 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(exteriorRing2, esriMultiPatchRingType.esriMultiPatchOuterRing);
//Interior Ring 2
IPointCollection interiorRing2PointCollection = new RingClass();
interiorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1.5, -1.5, 0), ref _missing, ref _missing);
interiorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3.5, -1.5, 0), ref _missing, ref _missing);
interiorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(3.5, -3.5, 0), ref _missing, ref _missing);
interiorRing2PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(1.5, -3.5, 0), ref _missing, ref _missing);
IRing interiorRing2 = interiorRing2PointCollection as IRing;
interiorRing2.Close();
multiPatchGeometryCollection.AddGeometry(interiorRing2 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(interiorRing2, esriMultiPatchRingType.esriMultiPatchInnerRing);
//Exterior Ring 3
IPointCollection exteriorRing3PointCollection = new RingClass();
exteriorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1, 1, 0), ref _missing, ref _missing);
exteriorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, 1, 0), ref _missing, ref _missing);
exteriorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, 4, 0), ref _missing, ref _missing);
exteriorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1, 4, 0), ref _missing, ref _missing);
IRing exteriorRing3 = exteriorRing3PointCollection as IRing;
exteriorRing3.Close();
multiPatchGeometryCollection.AddGeometry(exteriorRing3 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(exteriorRing3, esriMultiPatchRingType.esriMultiPatchOuterRing);
//Interior Ring 3
IPointCollection interiorRing3PointCollection = new RingClass();
interiorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1.5, 1.5, 0), ref _missing, ref _missing);
interiorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3.5, 1.5, 0), ref _missing, ref _missing);
interiorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3.5, 3.5, 0), ref _missing, ref _missing);
interiorRing3PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1.5, 3.5, 0), ref _missing, ref _missing);
IRing interiorRing3 = interiorRing3PointCollection as IRing;
interiorRing3.Close();
multiPatchGeometryCollection.AddGeometry(interiorRing3 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(interiorRing3, esriMultiPatchRingType.esriMultiPatchInnerRing);
//Exterior Ring 4
IPointCollection exteriorRing4PointCollection = new RingClass();
exteriorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1, -1, 0), ref _missing, ref _missing);
exteriorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1, -4, 0), ref _missing, ref _missing);
exteriorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, -4, 0), ref _missing, ref _missing);
exteriorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-4, -1, 0), ref _missing, ref _missing);
IRing exteriorRing4 = exteriorRing4PointCollection as IRing;
exteriorRing4.Close();
multiPatchGeometryCollection.AddGeometry(exteriorRing4 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(exteriorRing4, esriMultiPatchRingType.esriMultiPatchOuterRing);
//Interior Ring 4
IPointCollection interiorRing4PointCollection = new RingClass();
interiorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1.5, -1.5, 0), ref _missing, ref _missing);
interiorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-1.5, -3.5, 0), ref _missing, ref _missing);
interiorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3.5, -3.5, 0), ref _missing, ref _missing);
interiorRing4PointCollection.AddPoint(GeometryUtilities.ConstructPoint3D(-3.5, -1.5, 0), ref _missing, ref _missing);
IRing interiorRing4 = interiorRing4PointCollection as IRing;
interiorRing4.Close();
multiPatchGeometryCollection.AddGeometry(interiorRing4 as IGeometry, ref _missing, ref _missing);
multiPatch.PutRingType(interiorRing4, esriMultiPatchRingType.esriMultiPatchInnerRing);
return(multiPatchGeometryCollection as IGeometry);
}
