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This document is archived and information here might be outdated. Recommended version. |
IRay.Intersect Method (ArcObjects .NET 10.8 SDK)
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This document is archived and information here might be outdated. Recommended version. |
Returns a point collection containing all points of intersection, in order along the ray.
[Visual Basic .NET] Public Sub Intersect ( _ ByVal targetGeometry As IGeometry, _ ByVal intersectionPoints As IPointCollection _ )
[C#] public void Intersect ( IGeometry targetGeometry, IPointCollection intersectionPoints );
[C++]
HRESULT Intersect(
IGeometry* targetGeometry,
IPointCollection* intersectionPoints
);
[C++] Parameters targetGeometry
targetGeometry is a parameter of type IGeometry* intersectionPoints
intersectionPoints is a parameter of type IPointCollection*
Implemented for Points, Multipoints, Polylines, Polygons, Envelopes, and Multipatches.
This method is intended to be called against top-level geometries only (Point, Multipoint, Polyline, Polygon, Envelope, MultiPatch). To call this method against a Segment/Path or Ring, first add the part to a Polyline or Polygon container, respectively, and then call this method against the container.
public static void QueryPointsOfIntersection()
{
ILine line = new LineClass();
line.FromPoint = GetPoint();
line.ToPoint = GetPoint();
IRay ray = new RayClass();
ray.Origin = line.FromPoint;
ray.Vector = ConstructVector3D(line.ToPoint.X - line.FromPoint.X, line.ToPoint.Y - line.FromPoint.Y, line.ToPoint.Z - line.FromPoint.Z);
IGeometry multiPatchGeometry = GetMultiPatchGeometry();
IPointCollection intersectionPointCollection = new MultipointClass();
ray.Intersect(multiPatchGeometry, intersectionPointCollection);
//intersectionPointCollection[0] = (5, -2.13, 0.092)
//intersectionPointCollection[1] = (1.612, -2.651, 7.012)
}
private static IPoint GetPoint()
{
const double Min = -10;
const double Max = 10;
Random random = new Random();
double x = Min + (Max - Min) * random.NextDouble();
double y = Min + (Max - Min) * random.NextDouble();
double z = Min + (Max - Min) * random.NextDouble();
IPoint point = ConstructPoint3D(x, y, z);
MakeZAware(point as IGeometry);
return point;
}
private static IPoint ConstructPoint3D(double x, double y, double z)
{
IPoint point = ConstructPoint2D(x, y);
point.Z = z;
return point;
}
private static IPoint ConstructPoint2D(double x, double y)
{
IPoint point = new PointClass();
point.PutCoords(x, y);
return point;
}
private static void MakeZAware(IGeometry geometry)
{
IZAware zAware = geometry as IZAware;
zAware.ZAware = true;
}
public static IVector3D ConstructVector3D(double xComponent, double yComponent, double zComponent)
{
IVector3D vector3D = new Vector3DClass();
vector3D.SetComponents(xComponent, yComponent, zComponent);
return vector3D;
}