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[Physics.PhysX] QuickHullConvexHullLib::findSimplex: Simplex input points appers to be coplanar.

Discussion in 'Physics' started by ArchCodeEmbodyRomance, Feb 20, 2020.

  1. ArchCodeEmbodyRomance

    ArchCodeEmbodyRomance

    Joined:
    Jan 5, 2017
    Posts:
    1
    I create a Quad, and set its Transform as follows:
    position (306.2141, -94.32835, 378.1256)
    rotation (31.305, -86.606, 90.394)
    scale (11.69272, 100.1775, 15.23574).
    When i check “Convex“ propertie on Mesh Collider Component,it is no error.
    Then i change "Cooking Options" on Mesh Collider Component and check “Convex“ propertie on Mesh Collider Component again, editor pring two error:
    1.[Physics.PhysX] QuickHullConvexHullLib::findSimplex: Simplex input points appers to be coplanar.
    UnityEngine.GUIUtility:processEvent(Int32, IntPtr)
    2.Failed to create Convex Mesh from source mesh "Quad". An internal unspecified error has occured that could mean the Quickhull algorithm found the input mesh topologically challenging.
    UnityEngine.GUIUtility:processEvent(Int32, IntPtr)
    Final I change Rotation or Scale and check “Convex“ propertie on Mesh Collider Component again, The error disappear.
    My Unity version is 2019.3.0f5.
    I would like to know the reason for this problem and how I should tell the artists to avoid it

    I`m so sorry about my Englis.
     

    Attached Files:

  2. raitoryuukuu

    raitoryuukuu

    Joined:
    Jan 21, 2020
    Posts:
    7
    did you ever found a solution ?
     
  3. DevDunk

    DevDunk

    Joined:
    Feb 13, 2020
    Posts:
    4,969
  4. A5Xyck

    A5Xyck

    Joined:
    Jan 25, 2020
    Posts:
    1
    Had the same Error

    Recreating the parent object, which had weird rotations and scalings, did it for me.
    Guess it has something to do with parent-child transform relations.