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Heading, Altitude Write to Sim Computation (FSUIPC WebSocket Server)


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Can someone please verify if this is the correct reverse computation to write back heading (0x0580) and altitude (0x6020) to the sim? I think altitude is pretty much easy.  I am not convinced of the heading though.

I extracted it as follows:

heading = Math.round(response.data.heading * 360 / (65536*65536))
altitude = Math.round(response.data.altitude * 3.28084)

And I plan to write back as follows:

var newheading = (plannedrecord.heading / 360) * (65536/65536)
var newaltitude = plannedrecord.altitude / 3.28084
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It worked for heading. But for altitude I could not write as x6020 you cannot write to. So I found x0570 that you can write to. But it behaves oddly when I pass the altitude in meters. It flips the plane over and shuts the engine off.

Is the computation for writing to this offset different?

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4 minutes ago, Dabull said:

Is the computation for writing to this offset different?

Yes it's completely different. 6020 is an easier way of reading the altitude. 

0570 is an 8-byte integer (not a float like 6020) so you'll need to declare it as

{ name: 'altitude', address: 0x0570, type: 'int', size: 8 },

The conversion to metres/feet is:

var altitudeMetres = data.altitude / (65535 * 65535);
var altitudeFeet = data.altitude / (65535 * 65535) * 3.28084;

Conversion from metres/feet is:

var newAltitude = altitudeMetres * (65535 * 65535);
var newAltitude = altitudeFeet / 3.28084 * (65535 * 65535);


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