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ContactFilter2D and Physics2D.Raycast

Discussion in 'Physics' started by Alunze, May 7, 2018.

  1. Alunze

    Alunze

    Joined:
    Jun 2, 2013
    Posts:
    11
    Hello!

    There are basically two flavours of the Physics2D.Raycast function:

    - Without a ContactFilter2D filter, in which case the result is a single ray.
    - Using a ContactFilter2D filter, in which case the result is an array (of configurable size) of rays fulfilling the filter.

    I just want to get the ray to the closest surface that meets the criteria in the filter (which is a convenient construct), so my question is, if I use the filtered version, can I trust the returned rays are ordered by distance? . If I supply an array with a single position, would rays[0] be the shortest ray?

    Thanks in advance!
     
    Alunze, May 7, 2018
    #1
    Deeeds likes this.

  2. MelvMay

    MelvMay

    Unity Technologies

    Joined:
    May 24, 2013
    Posts:
    10,513
    It's irrelevant which version you use, all raycast results are sorted so first element is first along the ray, second is further etc.

    Hope that helps.
     
    Last edited: May 8, 2018
    MelvMay, May 8, 2018
    #2
    Deeeds likes this.

  3. Alunze

    Alunze

    Joined:
    Jun 2, 2013
    Posts:
    11
    That's exactly the information I needed. Much appreciated!
     
    Alunze, May 9, 2018
    #3