Strange output from "on ground" flag (0366)

[Even92LN]

Using this code in C# (.NET v4) i get very strange outputs from the "on ground flag".

        public int getIsOnGround()
        {
            bool result = false;
            int dwResult = -1;
            int token = -1;
            result = fsuipc.FSUIPC_Read(0x0366, 2, ref token, ref dwResult);
            result = fsuipc.FSUIPC_Process(ref dwResult);
            result = fsuipc.FSUIPC_Get(ref token, ref dwResult);
            
            return dwResult;
        }

This is from a test I did with FSX:

Before first takeoff: 1

After takeoff: 262145

After landing: 262144

After new takeoff: 262145

After landing: 262144

 

What am I doing wrong?

 

Best regards,

Even

Edited November 24, 2013 by Even92LN

[Paul Henty]

Hi Even,

 

Offset 0x0366 is only 2 bytes.  You're copying the value into dwResult which is 4 bytes (int).  This means only the lower 2 bytes are getting updated by the C# SDK you are using so you've got the bad values.

 

The best solution here is to use the correct length integer (2 bytes called 'short' in C#) to receive the value.  I think the following code will work but this isn't my SDK so I'm not very familiar with it.

 

public short getIsOnGround()
        {
            bool result = false;

            short onGround = 0;
            int dwResult = -1;
            int token = -1;
            result = fsuipc.FSUIPC_Read(0x0366, 2, ref token, ref dwResult);
            result = fsuipc.FSUIPC_Process(ref dwResult);
            result = fsuipc.FSUIPC_Get(ref token, ref onGround);
            return onGround;
        }

Edited November 24, 2013 by Paul Henty

[Even92LN]

Thanks alot, Paul! I will give it a try!

 

EDIT: Looks like that did the trick. Thanks for your help!

Edited November 30, 2013 by Even92LN