dene maxwell wrote: >> From: Josh Babcock <[EMAIL PROTECTED]> >> >> dene maxwell wrote: >>> Hi >>> I'm trying to get an xml animation going for AI taildraggers, as the AI >> FDM >>> doesn't seem to cater for this. I have copied the rotate animation >> example >>> from the Model-HowTo; >>> >>> <!-- ***** TailDragger ***** --> >>> <animation> >>> <type>rotate</type> >>> >> <property>/ai/models/aircraft/velocities/true-airspeed-kt</property> >>> <factor>1</factor> >>> <offset>1</offset> >>> <min>0.0</min> >>> <max>13.0</max> >>> <center> >>> <x-m>2</x-m> >>> <y-m>0</y-m> >>> <z-m>-1.5</z-m> >>> </center> >>> <axis> >>> <x>0</x> >>> <y>1</y> >>> <z>0</z> >>> </axis> >>> <!-- >>> <condition> >>> <less-than> >>> >> <property>/ai/models/aircraft/velocities/true-airspeed-kt</property> >>> <value>30</value> >>> </less-than> >>> </condition> >>> --> >>> </animation> >>> >>> but the min and max values don't have any effect... the plane rotates >> about >>> the wheels as the speed varies...to the extent at 180 knots it's flying >>> backwards and upside down ...very amusing first time but now just >>> frustrating... >>> >>> ...what am I doing wrong in this animation? >>> >>> TIA >>> :-D ene >>> >>> _________________________________________________________________ >>> Discover fun and games at @ http://xtramsn.co.nz/kids >>> >>> >>> >>> _______________________________________________ >>> Flightgear-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/flightgear-users >>> >> What you have will rise from 0 up to 13 as the airspeed rises from -1 up >> to 12, then stay at 13 as the airspeed keeps on rising. To fix this, >> make factor 1/n where n is the airspeed that you want the rotation to be >> 13. You probably also want offset to be 0, but I'm not sure exactly what >> you are doing. Think of it as a graph of Y=aX+b Y is your rotation, X is >> the airspeed, b is the offset, and a is the factor. It might help to >> actually draw the graph. >> >> Josh >> > Oh ...I know the factors are all wrong at the moment, but the problem is the > min and max aren't limiting the degree of moment... I would be quite happy > at this stage to get the tail up @0ktas then falling at a predetermined > level but at the moment there are no limits on the rotation despite the min > and max > > I know that factor will determine the gradient of the transition, what I > want is (typical taildragger behaviour) at a predetermined speed (say > 50knts) the tail to rise (assuming acceleration) to normal flying attitude > (ie 0 degrees).... the x-y graph would look like; > > Tail > Elevation > |-----------------Tail down (13*) > | \ > | \ > | \------------------Tail up (0*) > |________+__+_________________ > Vmin Vmax > Velocity-> > > but I need the min/max to work for this.... > > :-D ene > > _________________________________________________________________ > Become a fitness fanatic @ http://xtramsn.co.nz/health > > > > _______________________________________________ > Flightgear-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/flightgear-users >
Oh, right. Try min-deg and max-deg. Josh _______________________________________________ Flightgear-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-users
