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Needle Rotation query

C

Cee-Jaay

Messages
22
Hi all,

I'm on a project to create an analog Engine vibration gauge and have the background done and positioned the needle as an element with a needle image and have positioned it OK.

What I can't fathom is how to tie the angle of the needle with the variable value (It's a linear scale from zero in the 7 o'clock position round to five in the 4 o'clock position).


Any help here would be enormously appreciated.

Rgds Chris.

BTW I'm using FSX SP2
and ACES.EXE for design
 
Although you didn't say so, I'm assuming XML script because of the reference to the ACE.exe tool.

All "rotations" are defined by a non-linearity table, the points of which are determined by the x,y location where the tip of the needle will be when pointing in the specified position... <whew!>

If you load your image in Photoshop, you can use the cursor to read the x,y positions and simply enter them into the table.

I believe that the ACES.exe tool will also display x,y values based on your mouse cursor. Since I don't use the tool at all though, that's just what I think I remember... :D
 
Thanks hugely for that n4gix,

I've set a X and Y co-ordinates for maximum (5) and minimum (0) values.

One other thing is - would you know how I tie the gauge needle rotation to the variable? If I enter A: TURB ENG VIBRATION:1 as the script property of the "Expression" of the needle Element?

I get the error "Error Invalid script (no command is more than 4 characters".

And I can't see another property to use to specify that.

Thanks for the info,
Chris.
 
The variable is placed in the Properties/Script box as:

(A:TURB ENG VIBRATION:1,number) (or percent as you wish)

You must include the parentheses, and there's no space between A: and the variable name... ;)
 
Last edited:
Thanks, I got it working.

Actually, I found the ACE too unwieldy and have gone back to basics - creating/editing the XML in Notepad.

Funny thing was that the Variables listed in the SDK wouldn't work - But it worked when I used "A:TURB ENG1 VIBRATION, number", rather than "A:TURB ENG VIBRATION,index", don't know why.
 
Cee-Jaay said:
Thanks, I got it working.

Actually, I found the ACE too unwieldy and have gone back to basics - creating/editing the XML in Notepad.

Funny thing was that the Variables listed in the SDK wouldn't work - But it worked when I used "A:TURB ENG1 VIBRATION, number", rather than "A:TURB ENG VIBRATION,index", don't know why.
Click to expand...

That's because the correct syntax is:

A:Variable Name:index,units)

A:TURB ENG VIBRATION:1,number)
 
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