User:Warty: Difference between revisions

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(Replaced content with "== ILS in HUD == This has now been created as ILS in HUD --Warty (talk) 04:02, 30 December 2015 (EST) == Carrier Landing Assistant i...")
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== Carrier Landing Assistant in HUD ==
== Carrier Landing Assistant in HUD ==
{{#ev:youtube|baYkioV68k0|||Nimitz Almeria.|frame}}
{{#ev:youtube|baYkioV68k0|||Nimitz Almeria.|frame}}
 
This has now been moved t: [[Howto:Carrier_Landing_Assistant_in_HUD]]
This Howto Details modifications to the Canvas-based [[ILS_in_HUD]] Wiki.  It deals specifically with modifying an SU-37, though the principle should be applicable to any carrier-capable aircraft. The properties used are:
* /ai/models/carrier[%d]/controls/flols/angle-degs
* /ai/models/carrier[%d]/orientation/true-heading-deg
* /instrumentation/tacan/indicated-bearing-true-deg
* /orientation/heading-deg
 
Although a carrier would not be based on this data, in real life, this method has the advantage of being "''generic''".
 
== Warnings and Limitations ==
* This HowTo builds on the [[ILS_in_HUD]] Wiki.  If you haven't fully read and understood that then you probably should not read any further.  Just take the video as inspiration for what you may one day achieve and go back a stage.
* It is based on having a valid TACAN signal and a carrier in range and also that the carrier is "'''/ai/models/carrier[0]'''".  It does NOT do any error-checking to see if this is the case and so this would need to be done for your own implementation in an aircraft.
* It was done as a quick fix, just to see if it was possible. Consequently it is not particularly elegant or well-commented. Hopefully it will be improved in time.
 
== The Canvas graphics elements ==
Additions to the '''new: func(placement)'''
<syntaxhighlight lang="nasal">
# ----------------------------------------------------------------- Carrier Landing System
# UP/DOWN:
  # glide slope indicator for CARRIER
    m.gsiC = m.root.createChild("group", "GSI");
    m.gsiC.createChild("path")
        .moveTo(8, 0)
        .arcSmallCCW(8, 8, 0, -16, 0)
        .arcSmallCCW(8, 8, 0,  16, 0)
        .moveTo(-4, 0)
        .horiz(-150)
        .moveTo(4, 0)
        .horiz(150)
        .setStrokeLineWidth(2.0)
        .setColor(1,1,0);     
      # Slope to CARRIER vertical needle deflection text box (up/down)     
      m.STC =
      m.text.createChild("text")
      .setFontSize(14, 0.9)
            .setDrawMode(3)
            .setPadding(2)
            .setAlignment("center-top")
            .setTranslation(180, -20)
            .setColor(1,1,0);   
# LEFT/RIGHT:
    # localiser beam indicator for CARRIER 
    m.lbiC = m.root.createChild("group", "GSI");
    m.lbiC.createChild("path")
        .moveTo(8, 0)
        .arcSmallCCW(8, 8, 0, -16, 0)
        .arcSmallCCW(8, 8, 0,  16, 0)
        .moveTo(0, -4)
        .vert(-40)
        .moveTo(0, 4)
        .vert(95)
        .setStrokeLineWidth(2.0)
        .setColor(1,1,0);
    # For Carrier LANDING DECK heading text box
    m.carrierHdgTxt =
      m.text.createChild("text")
      .setFontSize(16, 0.9)
            .setAlignment("right-top")
            .setTranslation(240, 105)
            .setColor(1,1,0);
    # Bearing TO the carrier text box
    m.carrierBrgTxt =
      m.text.createChild("text")
      .setFontSize(16, 0.9)
            .setAlignment("right-top")
            .setTranslation(240, 90)
            .setColor(1,1,0);
    # Carrier Offset text box
    m.carrierOffTxt =
      m.text.createChild("text")
      .setFontSize(16, 0.9)
            .setAlignment("center-top")
            .setTranslation(0, 100)
            .setColor(1,1,0);
    # Carrier pointer text box
    m.carrierDiagramTxt =
      m.text.createChild("text")
      .setFontSize(24, 0.9)
            .setAlignment("center-top")
            .setTranslation(0, -70)
            .setColor(1,1,0)
            .setText('=>');
    # relativeDeckHeading text box
      m.relativeDeckHeadingText =
      m.text.createChild("text")
      .setFontSize(12, 1.0)
            .setAlignment("center-top")
            .setTranslation(0, -55)
            .setColor(1,1,0);
# ---------------------------------------------------------- end of Carrier Landing System
</syntaxhighlight>
 
== Drawing them on the HUD ==
 
Additions to the '''update: func()'''
 
<syntaxhighlight lang="nasal">
# The CARRIER Glide Slope Up/Down needle
var closestCarrier = 0;
var slopeToCarrierProp = sprintf("/ai/models/carrier[%d]/controls/flols/angle-degs", closestCarrier);
var slopeToCarrier = getprop(slopeToCarrierProp);
me.STC.setText(sprintf("%1.2f", -slopeToCarrier));
me.STC.setTranslation(185, 20*(slopeToCarrier -3) -5 );
me.gsiC.setTranslation(0, 20*(slopeToCarrier -3) );
# The CARRIER approach heading Left/Right needle
var carrierHdgProp = sprintf("/ai/models/carrier[%d]/orientation/true-heading-deg", closestCarrier);
var carrierHdg = getprop(carrierHdgProp);
me.carrierHdgTxt.setText(sprintf("DeckHdg: %1.0f", carrierHdg-8)); # allow for landing deck offset
var carrierBrgTo = getprop("/instrumentation/tacan/indicated-bearing-true-deg");
me.carrierBrgTxt.setText(sprintf("BrgTo: %1.0f", carrierBrgTo)); # heading TO the carrier
var carrierOffset = carrierHdg - carrierBrgTo -8 ; # landing deck offset
me.carrierOffTxt.setText(sprintf("%1.1f", -carrierOffset));
me.carrierOffTxt.setTranslation(-10*(carrierOffset), 100 );
me.lbiC.setTranslation(-10*(carrierOffset), 0 );
var currentHeading = getprop("/orientation/heading-deg");
var relativeDeckHeading = -(currentHeading - carrierHdg +8) ;
me.relativeDeckHeadingText.setText(sprintf("RelHdg: %1.0f", relativeDeckHeading)); # landing deck offset
me.carrierDiagramTxt.setRotation( ((relativeDeckHeading -105 )* math.pi )/ 180);
var hdgOffsetToCarrier =  currentHeading - carrierBrgTo;
me.carrierDiagramTxt.setTranslation(-10*(hdgOffsetToCarrier), -90 );
</syntaxhighlight>
 
== Related Topics ==
* [[ILS_in_HUD]]
* [[Howto:Carrier]]

Revision as of 18:24, 30 December 2015

ILS in HUD

This has now been created as ILS in HUD --Warty (talk) 04:02, 30 December 2015 (EST)

Carrier Landing Assistant in HUD

Nimitz Almeria.

This has now been moved t: Howto:Carrier_Landing_Assistant_in_HUD

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