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Replace Area gravity point distance scale with unit distance

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Aaron Franke 2023-01-29 18:11:41 -06:00
parent 866e2b95dc
commit 79215131b5
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17 changed files with 70 additions and 66 deletions
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5
doc/classes/PhysicsServer3D.xml
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@ -1315,8 +1315,9 @@
<constant name="AREA_PARAM_GRAVITY_IS_POINT" value="3" enum="AreaParameter">
Constant to set/get whether the gravity vector of an area is a direction, or a center point.
</constant>
<constant name="AREA_PARAM_GRAVITY_DISTANCE_SCALE" value="4" enum="AreaParameter">
Constant to set/get the falloff factor for point gravity of an area. The greater this value is, the faster the strength of gravity decreases with the square of distance.
<constant name="AREA_PARAM_GRAVITY_POINT_UNIT_DISTANCE" value="4" enum="AreaParameter">
Constant to set/get the distance at which the gravity strength is equal to the gravity controlled by [constant AREA_PARAM_GRAVITY]. For example, on a planet 100 meters in radius with a surface gravity of 4.0 m/s², set the gravity to 4.0 and the unit distance to 100.0. The gravity will have falloff according to the inverse square law, so in the example, at 200 meters from the center the gravity will be 1.0 m/s² (twice the distance, 1/4th the gravity), at 50 meters it will be 16.0 m/s² (half the distance, 4x the gravity), and so on.
The above is true only when the unit distance is a positive number. When this is set to 0.0, the gravity will be constant regardless of distance.
</constant>
<constant name="AREA_PARAM_LINEAR_DAMP_OVERRIDE_MODE" value="5" enum="AreaParameter">
Constant to set/get linear damping override mode in an area. See [enum AreaSpaceOverrideMode] for possible values.