Patch attached.
Added steering to the four aftmost main gear axels -- with animations!
Found out just the other day that the AN-225 indeed steers on some of the
main gear wheels. The minimum turning radius is a wild guess however.
(Assumed a 45 deg average on the nose gears.) It now turns (quite
effortlessly) around a point straight out to the side from the second main
gear axel (nr 2 of the 3 non-steerable main gear axels), with a minimum
radius of 25.75 meters. (i.e. near engine nr 1 or 6) The option "squared"
was removed on steering. (Squaring radians messed up my calculations of the
turning angle of the respective wheels. Not that it's a perfect calculation
now either.) Ground wheel steering should, rather, not be connected to
directly the rudder pedals I think...
Also added transition-time(s) for the steering.
By the way:
README.yasim says the "semi-deprecated" transition-time is "Time in
seconds to slew through input range." I'm not quite sure what it is, but
it's not that. ;) (seconds for 2*1.0 on the output property? I.e. for a
rotation, that'd be 2.0 radians --? It doesn't operate on the input range
taking src/dst translations into account anyway.) Can't tell if this is a
code bug or a doc error.
Index: data/Aircraft/AN-225/AN-225-yasim.xml
===================================================================
RCS file: /var/cvs/FlightGear-0.9/data/Aircraft/AN-225/AN-225-yasim.xml,v
retrieving revision 1.5
diff -p -u -r1.5 AN-225-yasim.xml
--- data/Aircraft/AN-225/AN-225-yasim.xml 2 Mar 2006 22:40:56 -0000
1.5
+++ data/Aircraft/AN-225/AN-225-yasim.xml 24 May 2007 18:01:25 -0000
@@ -164,7 +164,8 @@ them out of my 3d modeller.
<!-- Landing Gear -->
<!-- Front Left -->
<gear x="20.0" y="1.0" z="-4.6" retract-time="10" compression="1.0"
spring="1.1">
- <control-input axis="/controls/flight/rudder" control="STEER" square="true"/>
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1.0" dst0="-0.8052" src1="1.0" dst1="0.7664"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<!--
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
@@ -173,13 +174,15 @@ them out of my 3d modeller.
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="2.5"/>
<control-output control="EXTEND" prop="/gear/gear[0]/position-norm"/>
<control-output control="STEER" prop="/gear/gear[0]/steering-norm"/>
</gear>
<!-- Front Right -->
<gear x="20.0" y="-1.0" z="-4.6" retract-time="10" compression="1.0"
spring="1.1">
- <control-input axis="/controls/flight/rudder" control="STEER" square="true"/>
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1.0" dst0="-0.7664" src1="1.0" dst1="0.8052"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<!--
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
@@ -188,6 +191,7 @@ them out of my 3d modeller.
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="2.5"/>
<control-output control="EXTEND" prop="/gear/gear[1]/position-norm"/>
<control-output control="STEER" prop="/gear/gear[1]/steering-norm"/>
</gear>
@@ -224,43 +228,63 @@ them out of my 3d modeller.
</gear>
<gear x="-9.05" y="3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.1453" src1="1.0" dst1="0.1135"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="15.7"/>
<control-output control="EXTEND" prop="/gear/gear[5]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[5]/steering-norm"/>
</gear>
<gear x="-10.72" y="3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.2169" src1="1.0" dst1="0.1694"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="10.5"/>
<control-output control="EXTEND" prop="/gear/gear[6]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[6]/steering-norm"/>
</gear>
<gear x="-12.42" y="3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.2876" src1="1.0" dst1="0.2264"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="7.9"/>
<control-output control="EXTEND" prop="/gear/gear[7]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[7]/steering-norm"/>
</gear>
<gear x="-14.10" y="3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.3546" src1="1.0" dst1="0.2808"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="6.4"/>
<control-output control="EXTEND" prop="/gear/gear[8]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[8]/steering-norm"/>
</gear>
<!-- Main Right -->
@@ -295,43 +319,63 @@ them out of my 3d modeller.
</gear>
<gear x="-9.05" y="-3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.1135" src1="1.0" dst1="0.1453"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="15.7"/>
<control-output control="EXTEND" prop="/gear/gear[12]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[12]/steering-norm"/>
</gear>
<gear x="-10.72" y="-3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.1694" src1="1.0" dst1="0.2169"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="10.5"/>
<control-output control="EXTEND" prop="/gear/gear[13]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[13]/steering-norm"/>
</gear>
<gear x="-12.42" y="-3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.2264" src1="1.0" dst1="0.2876"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="7.9"/>
<control-output control="EXTEND" prop="/gear/gear[14]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[14]/steering-norm"/>
</gear>
<gear x="-14.10" y="-3.2" z="-4.6" retract-time="10" compression="1.0"
spring="0.6">
+ <control-input axis="/controls/flight/rudder" control="STEER"
+ src0="-1" dst0="-0.2808" src1="1.0" dst1="0.3546"
+ invert="true"/>
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="EXTEND" transition-time="10"/>
<control-speed control="BRAKE" transition-time="0.7"/>
+ <control-speed control="STEER" transition-time="6.4"/>
<control-output control="EXTEND" prop="/gear/gear[15]/position-norm"/>
+ <control-output control="STEER" prop="/gear/gear[15]/steering-norm"/>
</gear>
<!-- Fuel tanks -->
Index: data/Aircraft/AN-225/Models/AN-225-model.xml
===================================================================
RCS file: /var/cvs/FlightGear-0.9/data/Aircraft/AN-225/Models/AN-225-model.xml,v
retrieving revision 1.3
diff -p -u -r1.3 AN-225-model.xml
--- data/Aircraft/AN-225/Models/AN-225-model.xml 2 Mar 2006 22:40:57
-0000 1.3
+++ data/Aircraft/AN-225/Models/AN-225-model.xml 24 May 2007 18:01:26
-0000
@@ -1405,7 +1405,7 @@ AN225 model/animation config.
<object-name>L-NG-Strut</object-name>
<property>gear/gear[0]/steering-norm</property>
<offset-deg>0</offset-deg>
- <factor>-45</factor>
+ <factor>-57.30</factor>
<center>
<x-m>-20.03</x-m>
<y-m>-0.93</y-m>
@@ -1583,7 +1583,7 @@ AN225 model/animation config.
<object-name>R-NG-Strut</object-name>
<property>gear/gear[1]/steering-norm</property>
<offset-deg>0</offset-deg>
- <factor>-45</factor>
+ <factor>-57.30</factor>
<center>
<x-m>-20.03</x-m>
<y-m>0.93</y-m>
@@ -2292,6 +2292,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>L-MG-4-IS-Tyre</object-name>
+ <object-name>L-MG-4-OS-Tyre</object-name>
+ <object-name>L-MG-4-IS-Hub</object-name>
+ <object-name>L-MG-4-OS-Hub</object-name>
+ <object-name>L-MG-4-Strut</object-name>
+ <property>gear/gear[5]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>9.05</x-m>
+ <y-m>-3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
@@ -2472,6 +2494,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>L-MG-5-IS-Tyre</object-name>
+ <object-name>L-MG-5-OS-Tyre</object-name>
+ <object-name>L-MG-5-IS-Hub</object-name>
+ <object-name>L-MG-5-OS-Hub</object-name>
+ <object-name>L-MG-5-Strut</object-name>
+ <property>gear/gear[6]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>10.72</x-m>
+ <y-m>-3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
@@ -2652,6 +2696,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>L-MG-6-IS-Tyre</object-name>
+ <object-name>L-MG-6-OS-Tyre</object-name>
+ <object-name>L-MG-6-IS-Hub</object-name>
+ <object-name>L-MG-6-OS-Hub</object-name>
+ <object-name>L-MG-6-Strut</object-name>
+ <property>gear/gear[7]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>12.42</x-m>
+ <y-m>-3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
@@ -2832,6 +2898,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>L-MG-7-IS-Tyre</object-name>
+ <object-name>L-MG-7-OS-Tyre</object-name>
+ <object-name>L-MG-7-IS-Hub</object-name>
+ <object-name>L-MG-7-OS-Hub</object-name>
+ <object-name>L-MG-7-Strut</object-name>
+ <property>gear/gear[8]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>14.10</x-m>
+ <y-m>-3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
@@ -3552,6 +3640,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>R-MG-4-IS-Tyre</object-name>
+ <object-name>R-MG-4-OS-Tyre</object-name>
+ <object-name>R-MG-4-IS-Hub</object-name>
+ <object-name>R-MG-4-OS-Hub</object-name>
+ <object-name>R-MG-4-Strut</object-name>
+ <property>gear/gear[12]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>9.05</x-m>
+ <y-m>3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
@@ -3732,6 +3842,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>R-MG-5-IS-Tyre</object-name>
+ <object-name>R-MG-5-OS-Tyre</object-name>
+ <object-name>R-MG-5-IS-Hub</object-name>
+ <object-name>R-MG-5-OS-Hub</object-name>
+ <object-name>R-MG-5-Strut</object-name>
+ <property>gear/gear[13]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>10.72</x-m>
+ <y-m>3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
@@ -3912,6 +4044,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>R-MG-6-IS-Tyre</object-name>
+ <object-name>R-MG-6-OS-Tyre</object-name>
+ <object-name>R-MG-6-IS-Hub</object-name>
+ <object-name>R-MG-6-OS-Hub</object-name>
+ <object-name>R-MG-6-Strut</object-name>
+ <property>gear/gear[14]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>12.72</x-m>
+ <y-m>3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
@@ -4092,6 +4246,28 @@ AN225 model/animation config.
</condition>
</animation>
+<!-- Steering -->
+ <animation>
+ <type>rotate</type>
+ <object-name>R-MG-7-IS-Tyre</object-name>
+ <object-name>R-MG-7-OS-Tyre</object-name>
+ <object-name>R-MG-7-IS-Hub</object-name>
+ <object-name>R-MG-7-OS-Hub</object-name>
+ <object-name>R-MG-7-Strut</object-name>
+ <property>gear/gear[15]/steering-norm</property>
+ <offset-deg>0</offset-deg>
+ <factor>-57.30</factor>
+ <center>
+ <x-m>14.10</x-m>
+ <y-m>3.2</y-m>
+ <z-m>-2.0</z-m>
+ </center>
+ <axis>
+ <x>0</x>
+ <y>0</y>
+ <z>1</z>
+ </axis>
+ </animation>
<!-- Extend/Retract -->
<!-- Swing in/out -->
<animation>
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