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FS2004 Makemdl.Parts XML - Stacked (nested) <Parts>?

Milton_Shupe

Milton_Shupe

Resource contributor
Messages
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us-newmexico
Sorry for the continued XML questions :-)

I have the need to control multiple model parts Hiding/Showing based on one condition. Can <Parts> sections be embedded (nested) in the conditional statement? In gauges, one can have multiple embedded <elements>. Is this true for <parts> in the makemdl.parts xml?

In my ship project, if Parking_Brake is set (and anchors displayed), then I want to Hide all the sails and Unhide the Stowed Sails (sailsecured).

Simply stated, if parking brake is set, hide all sails and unhide sailsecured (stowed sails).

How can this be done most efficiently?

This is my existing code:


<!-- Show/hide Anchors/Stowed Sails Based on Parking Brake -->

<part>
<name>anchors</name>
<visible_in_range>
<parameter>
<code>
(A:Parking_Brake, percent) 1 &gt;
</code>
</parameter>
<minvalue>1</minvalue>
</visible_in_range>
</part>

****Can this next section be embedded in the above condition?****

<part>
<name>sailsecured</name>
<visible_in_range>
<parameter>
<code>
(A:Parking_Brake, percent) 1 &gt;
</code>
</parameter>
<minvalue>1</minvalue>
</visible_in_range>
</part>

****Can these next two sections be embedded in the first conditional test?****

<!-- Jibs Visibility Based on Flaps Settings -->

<part>
<name>jibs_port</name>
<visible_in_range>
<parameter>
<code>
(A:Trailing edge flaps0 left angle, degrees) 60 &lt;
</code>
</parameter>
<minvalue>1</minvalue>
</visible_in_range>
</part>

<part>
<name>jibs_starboard</name>
<visible_in_range>
<parameter>
<code>
(A:Trailing edge flaps0 left angle, degrees) 59 &gt;
</code>
</parameter>
<minvalue>1</minvalue>
</visible_in_range>
</part>
 
Code: 
<part>
<name>anchors</name>
<visible_in_range>
<parameter>
<code>
(A:BRAKE PARKING POSITION, position) 1 &gt;
if{ 1 } els{ 0 }
</code>
</parameter>
<minvalue>1</minvalue>
</visible_in_range>
</part>

<part>
<name>sailsecured</name>
<visible_in_range>
<parameter>
<code>
(A:BRAKE PARKING POSITION, position) 1 &gt;
if{ 1 } els{ 0 }
</code>
</parameter>
<minvalue>1</minvalue>
</visible_in_range>
</part>
 
Code: 
<part>
<name>anchors</name>
<visible_in_range>
   <parameter>
     <code>
        (A:BRAKE PARKING POSITION, position) 1 &gt;
           if{ 1 } els{ 0 }
     </code>
   </parameter>
   <minvalue>1</minvalue>
</visible_in_range>
</part>

Hmmm, this code is not working as expected. Nothing happens on parking brake set.

What value should be expected in "position"? Are we testing this variable correctly?

EDIT: Per my test gauge, the value of A:BRAKE PARKING POSITION is changing from 0 to 1 for parking brake set. The hide/unhide is just not working from the makemdl.parts code. Is the test for "1" correct, or should that be "0"? The anchor chain should show with the Parking Brake set. Nevermind ... duh :) Test should be > 0.
 
Last edited:
How do I change the code below to add a second condition?

I need this part to show if both these conditions are met:

(A:Trailing edge flaps0 left angle, degrees) 50 &lt; and (A:BRAKE PARKING POSITION, position) 0 ==;

Code: 
<part> 
<name>staysails_port</name> 
<visible_in_range> 
   <parameter> 
     <code>
      (A:Trailing edge flaps0 left angle, degrees) 50 &lt;
     </code>
   </parameter>
     <minvalue>1</minvalue> 
</visible_in_range>
</part>

And so that I do not continue to bug you, is there a good reference somewhere showing how to construct these conditional statements?
 
Hey Milton,

<part>
<name>staysails_port</name>
<visible_in_range>
<parameter>
<code>
(A:Trailing edge flaps0 left angle, degrees) 50 &lt;
(A:BRAKE PARKING POSITION, position) 0 ==;
and
</code>
</parameter>
<minvalue>1</minvalue>
</visible_in_range>
</part>

(A:Trailing edge flaps0 left angle, degrees) 50 &lt;
(A:BRAKE PARKING POSITION, position) 0 ==;
and

You add a 'and' to the 'bottom' of the stack for each added line. So if you have 4 lines of conditions, then you have three 'and's at the bottom of that stack. (You can also add or to one, like and or and). These would go in one line, like this;

(A:Trailing edge flaps0 left angle, degrees) 50 &lt;
(A:BRAKE PARKING POSITION, position) 0 ==;
(A:Trailing edge flaps0 left angle, degrees) 50 &lt;
(A:BRAKE PARKING POSITION, position) 0 ==;
and and and <--- three of them

You are right on the verge of a logic statement as well. Easier then you think. Below a stack like this, you would then add your if{ and els{ sections below the stack (if needed).

For instance,

(A:Trailing edge flaps0 left angle, degrees) 50 &lt;
(A:BRAKE PARKING POSITION, position) 0 ==;
and
if{ 1 (>L:Drop Anchor,bool) }
els{ 0 (>L:Drop Anchor,bool) }

Make sure you have a space between the insides of the brackets.
 
Wow! Thank you Bill; that's very instructional. :)
I will try all of them as I have a bunch more things waiting to be implemented.
 
Okay, I changed the code as follows and have tried some variations but no cigar ... yet :-)

The part should be visible if the variable is less than 50 and the parking brake is NOT on (i.e. 0)

Code: 
<part> 
<name>jibs_port</name> 
<visible_in_range> 
   <parameter> 
     <code>
       (A:Trailing edge flaps0 left angle, degrees) 50 &lt;
    (A:BRAKE PARKING POSITION, position) 1 &lt;   
    and
           if{ 1 } els{ 0 }
     </code>
   </parameter>
     <minvalue>1</minvalue> 
</visible_in_range>
</part>
 
Um, the units of this variable is "percent" not "position" and the value range from
(A:BRAKE PARKING POSITION,percent)
is 0 to 100 (percent)
Code: 
<!-- PARKING BREAK OFF -->
(A:BRAKE PARKING POSITION,percent) 0 ==
<!-- PARKING BREAK ON -->
(A:BRAKE PARKING POSITION,percent) 0 &gt;
Try this:
Code: 
<part>
  <name>jibs_port</name>
    <visible_in_range>
    <parameter>
      <code>
        (A:Trailing edge flaps0 left angle, degrees) 50 &lt;
        (A:BRAKE PARKING POSITION, percent) 0 ==
        and
        if{ 1 } els{ 0 }
      </code>
    </parameter>
    <minvalue>1</minvalue>
  </visible_in_range>
</part>
 
Last edited:
Thanks for that observation Bill. Interestingly enough, the anchor and stowed sails worked with "position". :-/

Here is what I have changed to and all code following this xml does not work so there is something wrong here with my constructs. It worked before I added the compound condition statement. It must be an issue with either the semi-colon or if/else statement. ??? Do I need the if/else statement here?

Code: 
<part>
<name>jibs_port</name>
<visible_in_range>
   <parameter>
     <code>
       (A:Trailing edge flaps0 left angle, degrees) 50 &lt;
    (A:BRAKE PARKING POSITION, percent) 1 &lt;
    and
           if{ 1 } els{ 0 }
     </code>
   </parameter>
     <minvalue>1</minvalue>
</visible_in_range>
</part>
 
Tried your suggestion Bill; no cigar ...

The code in front of this works, this code and all that follows do not work so still appears to be a construct issue.

EDIT: Hang on; I am on to something. .... Okay, Resolved; found I cannot use this as a comment :-/

<-- -------------------------------------- -->
Sorry for the confusion.

Code: 
<part>
  <name>jibs_port</name>
    <visible_in_range>
    <parameter>
      <code>
        (A:Trailing edge flaps0 left angle, degrees) 50 &lt;
        (A:BRAKE PARKING POSITION, percent) 0 ==
        and
        if{ 1 } els{ 0 }
      </code>
    </parameter>
    <minvalue>1</minvalue>
  </visible_in_range>
</part>
 
Last edited:
I have 3 different flags, animated for different wind speeds; flagslow for <15 knots, flagmed for 15-35 knots, and flagfast for over 35 knots. This Visibility Code is in the makemdl.parts file compiled with the model.

The animations work great with all flags. The issue is that I almost always have 2 flags showing and in some gusty situations, 3 flags have shown. Still winds < 10 knots usually shows the correct flag.

I have tried variations on the code and this is what I now have. Would you look at this to ensure I am chasing the right issue here? Thanks in advance.

Code: 
<!-- Show/Hide Flags Depending on Wind Speed  -->

<part>
  <name>flagslow</name>
    <visible_in_range>
    <parameter>
      <code>
        (A:AMBIENT WIND VELOCITY, knots) 15 &lt;
           if{ 1 } els{ 0 }
      </code>
    </parameter>
    <minvalue>1</minvalue>
  </visible_in_range>
</part>

<part>
  <name>flagfast</name>
    <visible_in_range>
    <parameter>
      <code>
        (A:AMBIENT WIND VELOCITY, knots) 35 &gt;
           if{ 1 } els{ 0 }
      </code>
    </parameter>
    <minvalue>1</minvalue>
  </visible_in_range>
</part>

<part>
  <name>flagmed</name>
    <visible_in_range>
    <parameter>
      <code>
        15 35 (A:AMBIENT WIND VELOCITY, knots) rng;
           if{ 1 } els{ 0 }
      </code>
    </parameter>
    <minvalue>1</minvalue>
  </visible_in_range>
</part>
 

Attachments

  • 2flags.jpg
    2flags.jpg
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Remove the semi-colon. It is killing the range evaluation.
rng;
This symbol is used only in conjunction with the &gt; and &lt; constructs.

Comments can be written two ways:
<!-- Comment Here -->
or
(* Comment Here *)
 
Thanks Bill; that's exactly what I needed to know. I appreciate your insight. :)

EDIT: Followup: That corrected my issue Bill. Thank you :-)
 
Last edited:
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