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Dark GDK / Joystick Top-Hat ID

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sydbod
16
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Joined: 14th Jun 2008
Location: Just look at the picture
Posted: 25th Jun 2008 16:57
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Hi All,

I am trying to integrate the Top Hat control on a joystick to enable directional views from an aircraft cockpit.

All the other Joystick controls have been straight forward so far.

To find Top-Hat position we use:
int dbJoystickHatAngle ( int iHat )

"iHat" is an ID number to distinguish between up to 4 different Top-Hat controls on one joystick.

What value does "int iHat" have to have to address the first Top-Hat?

Are the Top-Hat numbers going from 0 to 3, or 1 to 4, or is it some other number set that is determined from elsewhere?

Any information would be greatly appreciated as all my searches have come up empty.
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jinzai
18
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Joined: 19th Aug 2006
Location: USA
Posted: 25th Jun 2008 18:04
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0 to 3...gleaned from the sample program that comes from DBPro.

The DirectX SDK has the following additional information:

rgdwPOV

Direction controllers, such as point-of-view hats. The position is indicated in hundredths of a degree clockwise from north (away from the user). The center position is normally reported as - 1; but see Remarks. For indicators that have only five positions, the value for a controller is - 1, 0, 9,000, 18,000, or 27,000.
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Remarks.
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Some drivers report the centered position of the POV indicator as 65,535. Determine whether the indicator is centered as follows:

BOOL POVCentered = (LOWORD(dwPOV) == 0xFFFF);
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sydbod
16
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Joined: 14th Jun 2008
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Posted: 25th Jun 2008 18:59 Edited at: 25th Jun 2008 19:01
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Thanks for that.

So the ID number for the first Top-Hat will be "0".

There is still a discrepancy between what is from your documentation and what is in our documents from DarkGDK.


Quote: "For indicators that have only five positions, the value for a controller is - 1, 0, 9,000, 18,000, or 27,000. "



Our documentation says

Quote: "When the hat is being used, the return value is in tens of a degree so north would be zero, east would be 900, south is 1800 and west is 2700."


Anyway some experimentation will soon tell us what we have to use
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sydbod
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Joined: 14th Jun 2008
Location: Just look at the picture
Posted: 25th Jun 2008 19:32
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Have just confirmed that the information about Top-Hat controller measurements is actually in 1/100 of a degree as stated in the DirectX SDK is correct and the information about it being in 1/10 of a degree as stated in DarkGDK is WRONG.
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