LineOfSightOperator.MinDistance Property
Gets or sets the minimal range of the observer.
Thread safety: This property is not thread-safe. Show
Syntax
public AttributeVariable< System.Double > MinDistance { get; set; }Property Value
Type: An attribute variable that returns a value of type System.Double.
Default: 0.0
The minimal range of the observer, in meters.
Default: 0.0
The minimal range of the observer, in meters.
Remarks
Between the position of the observer and MinDistance, the observer sees nothing (or is not a threat).
The MinDistance has no effect when a LineOfSightOperator gets a line feature from its ObserverInput. But when the LineOfSightOperator gets a point feature, then the output raster will contain a circle, within MinDistance horizontally from the observer, whose cells contain the value that represents positive infinity (see LineOfSightOperator), which is normally displayed as transparent.
The derived operator TargetLineOfSightOperator interprets MinDistance in three dimensions, rather than as a horizontal distance.
Example
// Set MinDitsance to the half of the MaxDistance of the observer
public static void SetMinDistanceToHalfMaxDistance(LineOfSightOperator lineOfSightOperator)
{
// Get the current MaxDistance
double currentMaxDistance = 0.0;
lineOfSightOperator.MaxDistance.TryGetValue(new AttributeSet(), out currentMaxDistance);
// This property is a member of a type that might be referred to by a View
// or a GlobeView, either directly or indirectly through other objects, which means
// that you must use the Guard class to take the global configuration lock when it
// is modified to synchronize access with any running Carmenta Engine threads.
using (Guard guard = new Guard())
{
// Set the half MaxDistance as MinDistance
lineOfSightOperator.MinDistance = currentMaxDistance / 2.0;
}
}
Platforms
Windows, Linux, Android