Quick question about plug-in handling route

[Joao Pereira 1256632]

So, i print to a file all the points in the Extracted Route like this

 

EuroScopePlugIn::CAircraftExtractedRoute ext_route=Aircraft.GetExtractedRoute();

 

for(int j=0;j

textfile<

 

and for a given airplane it's the following:

BEDRA 4520N 4027N 3530N 3033N 2536N 2038N 1340N

 

Airplane is on fix BEDRA, as it was drew there. So why is it that when i do this:

ext_route.GetPointName(ext_route.GetPointsCalculatedIndex())

 

the given fix is 4520N?

 

The function GetPointsCaldulatedIndex says on EursocopePlugIn:

" Return :

// The index of point in the extracted route that edge is the

// closest to the actual plane position. The return value is

// between 0 and point number - 2.

// The value may be -1 indicating invalid state.

//-----------------------------------------------------------------"

 

And also, what's the meaning of this:

 

" const char * GetPointName ( int Index ) const ;

//-----------------------------------------------------------------

// Parameters :

// => Index - the index of the requested point. It must be

// between 0 and point number - 1.

//

// Return :

// The name of the point in the extracted route array.

//-----------------------------------------------------------------"

 

It must be between 0 and point number - 1??

 

Thank you in advance

[Gergely Csernak]

Joao,

 

ES calculates the points along the route from the flight plan. It puts them to an array. When we have n points, the indexes are 0, 1, ... n-1. If you have n points then it defines n-1 edges between them. The edge indexes are therefore 0, 1, ... n-2. Edge 0 is between point 0 and 2, ... edge n-2 is between points n-2 and n-1. When ES have these points it select the closest one to the plane and uses its index at GetPointsCaldulatedIndex.

[Joao Pereira 1256632]

I'm sorry Gergely, i'm not following.

 

Firstly: when you say this

Edge 0 is between point 0 and 2, ... edge n-2 is between points n-2 and n-1.

 

You said first edge is between point 0 and 2 so by order of logic, do you mean "edge n-2 is between points n-1 and n-3" ?

 

Secondly:so you are telling me that ES defines edges between points is the array of points. So GetPointsCaldulatedIndex gives the index of the closest edge? Why is it a point then..

 

Thank you for the help

[Gergely Csernak]

Surely it is a typing error. The first edge is between point 0 and 1.

The name GetPointsCaldulatedIndex is just based on GetPointsNumber.