/// <summary>
/// PreGenerate all Accesses from all Assets to all Tasks based on a simple Line of Sight model. Access is based on Line of Sight, a spherical Earth and the current ECI
/// position of the Asset and the Task.Target.DynamicState
/// </summary>
/// <param name="system">The system underconsideration</param>
/// <param name="tasks"></param>
/// <param name="startTime"></param>
/// <param name="endTime"></param>
/// <param name="stepTime"></param>
public static Stack<Access> pregenerateAccessesByAsset(SystemClass system, Stack<Task> tasks, double startTime, double endTime, double stepTime)
{
Stack<Access> accessesByAsset = new Stack<Access>();
// For all assets...
foreach (Asset asset in system.Assets)
{
// ...for all tasks...
foreach (Task task in tasks)
{
// ...for all time....
for (double accessTime = SimParameters.SimStartSeconds; accessTime <= SimParameters.SimEndSeconds; accessTime += SchedParameters.SimStepSeconds)
{
// create a new access, or extend the access endTime if this is an update to an existing access
bool hasAccess = Utilities.GeometryUtilities.hasLOS(asset.AssetDynamicState.PositionECI(accessTime), task.Target.DynamicState.PositionECI(accessTime));
if (hasAccess)
{
bool isNewAccess;
if (accessesByAsset.Count == 0 || accessTime == SimParameters.SimStartSeconds || accessesByAsset.Peek().Task.Target.Name != task.Target.Name)
isNewAccess = true;
else
isNewAccess = (accessTime - accessesByAsset.Peek().AccessEnd) > SchedParameters.SimStepSeconds;
if (isNewAccess)
{
Access newAccess = new Access(asset, task);
newAccess.AccessStart = accessTime;
newAccess.AccessEnd = accessTime;
accessesByAsset.Push(newAccess);
}
else // extend the access
accessesByAsset.Peek().AccessEnd = accessTime;
}
}
}
}
return accessesByAsset;
}
/// <summary>
/// Find all accesses available to an asset at the current time
/// </summary>
/// <param name="accesses"></param>
/// <param name="asset"></param>
/// <param name="currentTime"></param>
/// <returns></returns>
public static Stack <Access> getCurrentAccessesForAsset(Stack <Access> accesses, Asset asset, double currentTime)
{
Stack <Access> allAccesses = Access.getCurrentAccesses(accesses, currentTime);
return(new Stack <Access>(allAccesses.Where(item => item.Asset == asset)));
}
