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This document is archived and information here might be outdated. Recommended version. |
IRay.QueryPointAtDistance Method (ArcObjects .NET 10.8 SDK)
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This document is archived and information here might be outdated. Recommended version. |
Queries a point at a distance along the ray.
[Visual Basic .NET] Public Sub QueryPointAtDistance ( _ ByVal distance As Double, _ ByVal Point As IPoint _ )
[C#] public void QueryPointAtDistance ( double distance, IPoint Point );
[C++]
HRESULT QueryPointAtDistance(
double distance,
IPoint* Point
);
[C++] Parameters distance
distance is a parameter of type double Point
Point is a parameter of type IPoint*
public static void QueryPointAtDistance()
{
const double Distance = 8.822;
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);
IPoint point = new PointClass();
ray.QueryPointAtDistance(Distance, point);
//point = (5.244, 3.749, 4.738)
}
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;
}