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Resolved [1.0.0-prev.15] Setting Physics velocity is not applied to WorldTransform

Discussion in 'NetCode for ECS' started by Occuros, Nov 30, 2022.

  1. Occuros

    Occuros

    Joined:
    Sep 4, 2018
    Posts:
    300
    I just upgraded to the latest iteration (15) and my previous systems don't seem to work the same way anymore.

    When I am setting the target velocity in the following way:

    Code (CSharp):
    1.     var targetVelocity = PhysicsVelocity.CalculateVelocityToTarget(
    2.                         SystemAPI.GetComponent<PhysicsMass>(entity),
    3.                         translation, rotation,
    4.                         target, 1 / deltaTime);
    5.                     velocity = targetVelocity;
    The LocalTransform component values go to very high values, so does the PhysicsVelocity, but the WorldPosition doesn't update.

    The system runs in the `PredictedFixedStepSimulationSystemGroup` and it worked normally in the previous iterations (before the Transform System V2).

    Now I'm not sure if that might be a bug due to the new transform system, or me missing some setup to make it work properly.
     
    Occuros, Nov 30, 2022
    #1
    MagiJedi likes this.

  2. CMarastoni

    CMarastoni

    Unity Technologies

    Joined:
    Mar 18, 2020
    Posts:
    895
    The WorldPosition is updated only after the TransformSystemGroup run. Before V2, the world position was always calculated on the fly.
    Now it is a cached property and does not get updated automatically as expected. This is mostly a well known problem in general.

    I would thanks you for reporting this, since it also add to the cases that need to be addressed by the new transform system.
     
    CMarastoni, Jan 30, 2023
    #2
    MagiJedi and Occuros like this.

  3. Occuros

    Occuros

    Joined:
    Sep 4, 2018
    Posts:
    300
    Seen as in the latest release WorldPosition has been deprecated in favor of a faster TransformV2, this is no longer valid.
     
    Occuros, Apr 3, 2023
    #3