FSX ACE xml schema if condition

[brianb]

I have created a gauge in ACE xml with some 30 elements all of which are working but 1.
the element in question is a warning light for the altitude bug the code for which was in FS9 schema that I have tried unsuccessfully to convert.
can anybody point out the error, it always shows red.bmp whether the two variables are equal or not, even if I ensure they are equal by presing the "B" key
snippet below:-

<Macro Name="Round2">d flr s0 - 100 * near 100 / l0 +</Macro>
<Element id="Element">
    <FloatPosition>600.000,14.000</FloatPosition>
    <Image id="green.bmp" Name="green.bmp">
        <Transparent>True</Transparent>
    </Image>
        </Element>

    <Element id="Element">
        <FloatPosition>600.000,14.000</FloatPosition>
        <Visibility>(A:Radio height, feet) 18000 &lt;</Visibility>
                <Select id="Select">
                    <Expression id="Expression">
                        %(A:SEA LEVEL PRESSURE, inHG) @Round2 (A:KOHLSMAN SETTING HG, inHG) @Round2 == if{ 1 } els{ 0 }
                    </Expression>
                    <Case id="Case1">
                        <ExpressionResult>1</ExpressionResult>
                        <Image id="green.bmp" Name="green.bmp">
                        <Transparent>True</Transparent>
                        <Bright>True</Bright>
                        <Luminous>True</Luminous>
                        </Image>
                     </Case>
                    <Case id="Case0">
                        <ExpressionResult>0</ExpressionResult>
                        <Image id="red.bmp" Name="red.bmp">
                        <Transparent>True</Transparent>
                        </Image>
                    </Case>
                </Select>
    </Element>

regards

 

[Heretic]

That "%" should not be in the expression.

And that rounding macro for the value looks a bit overly complex to me.
I don't know what the format of the values for (A:SEA LEVEL PRESSURE, inHG) and (A:KOHLSMAN SETTING HG, inHG) is, but assuming that they're decimal separated, e.g. "29.92", an evaluation as simple as

(A:SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING HG, inHG) - abs 0.01 >=

should do the trick for the expression.
This will return "true" (1) when the difference between sea level pressure and kohlsman setting is greater than or equal to 0.01 ("abs" converts values into absolute, i.e. positive ones).

 

[taguilo]

Hi,

Macro definition is bad.

Use this in FSX schema:

        <Macro id="Round2" Name="Round2">
            <MacroValue>d flr s0 - 100 * near 100 / l0 +</MacroValue>
        </Macro>

Besides, as Bjoern stated, remove the % char in the element section

Tom

 

[brianb]

Thanks for the quick responses guys but neither worked, I had previously tried

%(A:SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING HG, inHG) - abs 0.01 >=

as sugested by taguilo but had a % as above, now removed and also edited the macro to FSX schema and removed the % in my code.
I added a few lines to display both the Kohlsman and SEA LEVEL variables and the results are shown in the image.

Clicking the red warning light resets BAROMETRIC to be equal.Even when equal I get the red warning.
Is there a way to display the <ExpressionResult>
BrianB

 

[Heretic]

Temporarily replace one of the other values in your display gauge with the evaluation or at least one of the pressure related variables to see the format returned.

 

[brianb]

I have been trying multiple variations including changing to millibars instead of inHG in case that was the problem.
I have added an element to display the expression result. By changing &gt;= to &lt;= the result changes to 1 or 0
initially therefore the true or false is evaluating correctly BUT varying the Kohlsman setting manually has no effect on on the evaluation result. see image:-

BrianB

 

[JB3DG]

It could be off at a much lower value just the 1000th decimal

 

[brianb]

It could be off at a much lower value just the 1000th decimal

It shouldn't be. pressing "B" key copies Sea Level To Kohlsman set.
But even when trying with rounding both to 2 dec places I am sure I got the same result but will check again.
Also the code is checking for 0.01 difference

<GaugeString>\{fnt1}\{clr2}EXP\{fnt}\{clr}%((A:SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING HG, inHG) 0.01 &gt;=) %!1.4f!\{fnt1}\{fnt}</GaugeString>

BrianB

 

[Roy Holmes]

Your code is missing a minus after the second expression. As it stands it does nothing, nothing is evaluated before being compared to 0.01.
Roy

 

[brianb]

OOPS! Mybad copy and paste to the post

<GaugeString>\{fnt1}\{clr2}EXP\{fnt}\{clr}%(((A:SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING HG, inHG) - abs) 0.01 &gt;=) %!1.4f!\{fnt1}\{fnt}</GaugeString>

SAME output as post#8
BrianB

 

[Heretic]

You do not need to wrap this in parenthesis.

((A:SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING HG, inHG) - abs) 0.01 >=

 

[brianb]

Thanks all
Unless code is in as post #10 the "expression result" 'gaugestring' does not parse correctly and display 0.000 or 1.000.
in 'expression' itself for evaluation I do not have the additional parenthesis.
I have now isolated this from my original gauge into the mini test gauge below nd is included as an attachment.

(the 'K' button is the equiv of k/b 'B' to reset Barometric)
As before changing &gt; to &lt; changes the 'expressionresult' but varying the kohlsman set manually does not have any effect

Can one of you please install and try get it working then point out my error please

 

[Heretic]

You still have a bugged instance of the evaluation in line 80.

Maybe FSX doesn't like the units of sea level pressure. What happens if you use millibars for both variables?

 

[brianb]

Thanks Heretic
The code to display the expression result correcty is

<GaugeString>\{fnt1}\{clr2}EXP RESULT\{fnt}\{clr}%((A:SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING HG, inHG) - abs 0.005 &lt;=) %!1.3f!\{fnt1}\{fnt}</GaugeString>

This is working correctly now and changes from 0.000 to 1.000 on changing the the Kohlsman Set
The residual problem is the image flip from green to red bmps in the expession itself at line 41 it always stays at the initial result even with a pressure change
baro.zip attached gut down to the minimum. button resets the pressure
SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING MB, Millibars) - abs 0.005 &gt;=

When encosed with tags red.bmp is shown
<Script>SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING MB, Millibars) - abs 0.005 &gt;=</Script>

 

[Heretic]

Youmixed up your units (mB and inHG) and omitted the variable type (A) for sea level pressure in your posted evaluation example.
Therefor:

<Expression id="Expression">
<Script>(A:SEA LEVEL PRESSURE, inHG) (A:KOHLSMAN SETTING HG, inHG) - abs 0.005 &lt;=</Script>
</Expression>

See here: https://msdn.microsoft.com/en-us/library/cc526953.aspx#Expression_Objects

 

[brianb]

Thanks Heretic, all working
My mind was getting scrambled the number of times I cut and pasted areas of code.
Incidently it works if both are millibars as well
BrianB

 

[Heretic]

That's good to know. Thanks!