Ground shaking effect
Addition to the existing headshake/redout to provide some cockpit shaking effect when traversing rough ground. Path from Benedikt HALLINGER.
This commit is contained in:
Stuart Buchanan
parent
eaa31bb422
commit
38ec3d2be8
3 changed files with 248 additions and 7 deletions
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@ -4,12 +4,13 @@
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## ##
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## Improved redout/blackout system for Flightgear ##
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## ##
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## Author: Nikolai V. Chr. (property rules), Thorsten Renk (shaders) ##
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## Author: Nikolai V. Chr. (property rules), Thorsten Renk (shaders), ##
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## Benedikt Hallinger (groundshake effect) ##
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## ##
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## ##
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## ##
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## ##
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## Version 2.05 License: GPL 2.0 ##
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## Version 2.10 License: GPL 2.0 ##
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## ##
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###################################################################################
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-->
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@ -49,6 +50,24 @@
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<tunnel>sim/rendering/als-filters/black-factor</tunnel>
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<als>sim/rendering/shaders/skydome</als>
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<filters>sim/rendering/als-filters/use-filtering</filters>
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<groundshake>
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<!-- inputs -->
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<effect-factor>sim/rendering/headshake/groundshake/effect-factor</effect-factor>
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<aircraft-scale-prop>sim/rendering/headshake/groundshake/custom-aircraft-scaler</aircraft-scale-prop>
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<default-aircraft-scaler-minkts>sim/rendering/headshake/groundshake/default-aircraft-scaler-min-knots</default-aircraft-scaler-minkts>
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<default-aircraft-scaler-maxkts>sim/rendering/headshake/groundshake/default-aircraft-scaler-max-knots</default-aircraft-scaler-maxkts>
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<default-aircraft-scaler-factor>sim/rendering/headshake/groundshake/default-aircraft-scaler-factor</default-aircraft-scaler-factor>
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<!-- internal -->
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<rng-source>sim/rendering/headshake/groundshake/internal/groundbump</rng-source>
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<terrain-bumpiness>/fdm/jsbsim/ground/bumpiness</terrain-bumpiness>
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<has-ground-contact>sim/rendering/headshake/groundshake/internal/ground-contact</has-ground-contact>
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<is-moving>sim/rendering/headshake/groundshake/internal/is-moving</is-moving>
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<default-aircraft-scaler>sim/rendering/headshake/groundshake/internal/default-aircraft-scaler</default-aircraft-scaler>
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<!-- outputs -->
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<result>sim/rendering/headshake/groundshake/result-g</result>
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</groundshake>
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</params>
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<filter><!-- check for NaN -->
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@ -227,10 +246,13 @@
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</enable>
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<input>
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<expression>
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<div>
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<property>accelerations/pilot/z-accel-fps_sec</property>
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<value>32.174</value>
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</div>
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<sum>
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<div>
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<property>accelerations/pilot/z-accel-fps_sec</property>
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<value>32.174</value>
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</div>
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<property alias="/params/groundshake/result" />
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</sum>
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</expression>
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</input>
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<output alias="/params/g-force"/>
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@ -1010,4 +1032,164 @@
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<output alias="/params/greyout"/>
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</filter>
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<!-- Ground shake effect
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The ground shake effect simulates the roughness of the terrain and the
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resulting forces onto the pilot when moving over it.
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This is achieved by generating random g-forces depending on the current terrain bumpyness.
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The force is then applied to the pilot depending on movement speed of the aircraft.
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Adjustments reside in sim/rendering/headshake/groundshake and can be done with this properties:
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- effect-factor: Overall effect scaling/enabling, so users can disable/adjust in cockpit-gui
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- default-aircraft-scaler-factor: allows to adjust the default aircraft effect output.
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To be overwritten from aircraft for which the default table is OK but the effect to small/big.
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Set to zero in case a separate scaler is provided
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- default-aircraft-scaler-min-knots: at this speed the effect starts
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- default-aircraft-scaler-max-knots: at this speed the effect reaches its maximum
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- custom-aircraft-scaler: aircraft devs calculate their own scaling algorythm result here.
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Most probably this is based on speed etc.
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Set default-aircraft-scaler-factor to zero, because otherwise the
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default still applies (default+custom effects are added)!
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-->
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<filter>
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<name>groundshake-terrain-g</name>
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<debug>false</debug>
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<type>gain</type>
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<gain><property alias="/params/groundshake/effect-factor"/></gain>
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<input>
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<condition>
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<!-- only act when having ground contact -->
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<property alias="/params/groundshake/has-ground-contact"/>
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<property alias="/params/groundshake/is-moving"/>
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</condition>
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<expression>
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<product>
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<!-- defines bumps of surface -->
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<property alias="/params/groundshake/rng-source"/>
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<!-- apply bumpiness of terrain -->
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<product>
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<value>1</value>
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<sum>
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<value>0.1</value> <!-- so we have a effect even on taxiway/runway -->
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<property alias="/params/groundshake/terrain-bumpiness"/>
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</sum>
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</product>
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<sum>
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<!-- apply the default aircraft scaling -->
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<!-- note: in case the aircraft dev wants his own model, he should deactivate the internal one -->
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<!-- this can be done by setting the deafualt-aircraft-factor to zero -->
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<property alias="/params/groundshake/default-aircraft-scaler" />
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<!-- apply aircraft specific scaling -->
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<!-- (this is intended to model gear damping based on speed etc) -->
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<property alias="/params/groundshake/aircraft-scale-prop"/>
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</sum>
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</product>
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</expression>
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</input>
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<input><value>0.0</value></input> <!-- in-air: no ground forces -->
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<output alias="/params/groundshake/result" />
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</filter>
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<filter>
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<name>Ground bumps</name>
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<!-- calculate the ground bump number: The rate and ammount of change simulates bumps in the surface -->
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<type>coherent-noise</type>
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<debug>false</debug>
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<enable>
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<condition>
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<property alias="/params/groundshake/has-ground-contact"/>
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<property alias="/params/groundshake/is-moving"/>
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</condition>
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</enable>
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<input>
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<!-- depending on position: the faster we go, the faster the prop changes, the faster the bumps come in -->
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<expression>
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<product>
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<sum>
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<property>/position/latitude-deg</property>
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<property>/position/longitude-deg</property>
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</sum>
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<value>50</value>
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</product>
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</expression>
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</input>
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<output><property alias="/params/groundshake/rng-source"/></output>
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<amplitude>0.5</amplitude>
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<absolute type="bool">false</absolute>
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<discrete-resolution>1024</discrete-resolution> <!-- frequency of the changes/bumps: the smaller, the more wide the bumps are -->
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</filter>
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<logic>
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<name>Aircraft has ground contact</name>
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<input>
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<or>
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<property>/gear/gear[0]/wow</property>
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<property>/gear/gear[1]/wow</property>
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<property>/gear/gear[2]/wow</property>
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<property>/gear/gear[3]/wow</property>
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</or>
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</input>
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<output>
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<property alias="/params/groundshake/has-ground-contact"/>
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</output>
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</logic>
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<logic>
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<name>Aircraft is moving</name>
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<input>
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<greater-than>
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<property>/velocities/groundspeed-kt</property>
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<value>1</value>
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</greater-than>
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</input>
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<output>
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<property alias="/params/groundshake/is-moving"/>
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</output>
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</logic>
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<filter>
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<name>Default aircraft scaling by speed</name>
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<!-- This filter defines a table for applying the scaled effect by airspeed to
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simulate basic damping of the gear. It allows for defining dynamic min/max knots
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ranges and scales linearly bin between -->
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<debug>false</debug>
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<type>gain</type>
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<gain> <property alias="/params/groundshake/default-aircraft-scaler-factor"/> </gain>
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<input>
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<!-- Formula: (1/(max-min))*speed-(min/(max-min)) lets us scale linearly with given min/max values -->
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<expression>
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<difference>
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<prod>
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<div>
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<value>1</value>
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<difference>
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<property alias="/params/groundshake/default-aircraft-scaler-maxkts"/>
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<property alias="/params/groundshake/default-aircraft-scaler-minkts"/>
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</difference>
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</div>
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<property>/velocities/groundspeed-kt</property>
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</prod>
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<div>
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<property alias="/params/groundshake/default-aircraft-scaler-minkts"/>
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<difference>
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<property alias="/params/groundshake/default-aircraft-scaler-maxkts"/>
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<property alias="/params/groundshake/default-aircraft-scaler-minkts"/>
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</difference>
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</div>
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</difference>
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</expression>
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<min>0.0</min>
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<max>1.0</max>
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</input>
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<output>
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<property alias="/params/groundshake/default-aircraft-scaler" />
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</output>
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</filter>
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</PropertyList>
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@ -211,7 +211,14 @@ Started September 2000 by David Megginson, david@megginson.com
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</redout>
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<headshake>
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<enabled type="bool" userarchive="y">false</enabled>
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<rate-m-g type="double">0.005</rate-m-g>
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<rate-m-g type="double">0.015</rate-m-g>
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<groundshake>
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<effect-factor type="double" userarchive="y">1.0</effect-factor>
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<default-aircraft-scaler-factor>5.0</default-aircraft-scaler-factor>
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<default-aircraft-scaler-min-knots>1.0</default-aircraft-scaler-min-knots>
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<default-aircraft-scaler-max-knots>50.0</default-aircraft-scaler-max-knots>
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<custom-aircraft-scaler>0.0</custom-aircraft-scaler> <!-- optionally supplied by aircrafts -->
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</groundshake>
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</headshake>
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<osg-displaysettings>
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<eye-separation type="double" userarchive="y">0.05</eye-separation>
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@ -63,6 +63,58 @@
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<command>dialog-apply</command>
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</binding>
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</checkbox>
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<group>
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<layout>hbox</layout>
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<text>
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<label> Effect rate m/g</label>
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<enable> <property>/sim/rendering/headshake/enabled</property> </enable>
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</text>
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<text>
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<halign>center</halign>
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<label>15.000</label>
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<format>%2.3f</format>
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<live>true</live>
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<property>/sim/rendering/headshake/rate-m-g</property>
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<enable> <property>/sim/rendering/headshake/enabled</property> </enable>
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</text>
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<slider>
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<min>0.0</min>
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<max>0.1</max>
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<property>/sim/rendering/headshake/rate-m-g</property>
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<live>true</live>
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<binding>
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<command>dialog-apply</command>
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</binding>
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<enable> <property>/sim/rendering/headshake/enabled</property> </enable>
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</slider>
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</group>
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<group>
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<layout>hbox</layout>
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<text>
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<label> Ground shake effect</label>
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<enable> <property>/sim/rendering/headshake/enabled</property> </enable>
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</text>
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<text>
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<halign>center</halign>
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<label>15.0</label>
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<format>%2.1f</format>
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<live>true</live>
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<property>/sim/rendering/headshake/groundshake/effect-factor</property>
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<enable> <property>/sim/rendering/headshake/enabled</property> </enable>
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</text>
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<slider>
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<min>0.0</min>
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<max>2.0</max>
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<property>/sim/rendering/headshake/groundshake/effect-factor</property>
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<live>true</live>
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<binding>
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<command>dialog-apply</command>
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</binding>
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<enable> <property>/sim/rendering/headshake/enabled</property> </enable>
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</slider>
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</group>
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<checkbox>
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<halign>left</halign>
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