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Disable a joystick axis using Simconnect

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grainboundary

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malta
Hi all,

Any ideas? I tried the joystick input sample but what that does is disable the info to be displayed rather than blocking it from doing further input to the aircraft.

Hope you can help me.

Regards
 
OK, looks like I am close. Now I have a slight problem.

I want to convert an integer, evt->dwData to a float and, I partially succeeded except that, negative values are really a pain. They are confusing and numbers that aren't making sense at all.

Any help would be appreciated, thanks a lot
 
Am I missing something? dwData is presumably a DWORD which is an unsigned 32-bit integer (0-4,294,967,295) and shouldn't be negative.
 
How is negative an issue? To convert from an integer joystick axis value to a float (I'm assuming you want a -1 to 1 value range) you just use:

float scalar = (float)(int)evt->dwData / 16384.0f;

or if you want double instead of float:

double scalar = (double)(int)evt->dwData / 16384.0;

The (int) cast says to treat as a signed int instead of a DWORD, the (float) or (double) cast says to convert to a floating point value, which at this point will range from -16384.0 to 16384.0. Dividing by 16384.0 just converts to a -1 to 1 scalar value.

16384 is generally the range for joystick axis events, but other events can have different ranges, so check the SDK docs event list for the event(s) you are receiving.


dwData being a DWORD is just a placeholder item in the return structure, you generally need to cast it to an appropriate type depending on who sent the data (in this case, which event was sent). In the case of RequestDataOnXxx return structures, you actually cast the address of dwData to a pointer to the data type you requested.
 
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