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Detect blocking access to parts of NavMesh

Discussion in 'Navigation' started by God0fMagic, Feb 17, 2020.

  1. God0fMagic

    God0fMagic

    Joined:
    Feb 8, 2019
    Posts:
    16
    Hello,
    I want Player to be able to be able to place obstacles for enemies on the map but I want to make sure that there is always a path from entrance to base. I could just check if path from entrance to base is valid but enemies can spawn at any tile at the edge of the map.

    My idea is that I know the number of NavMesh pieces given terrain has when I create the map. So if the number increases I will know that path for some enemies was blocked. But I can not seem to find a way to find this number. Also, if there are any other solutions for this I would love to hear it.

    A picture to show clearly what exactly I mean. Numbers from 1 to 5 show those "NavMesh pieces", with 5 being the main one where everything walks. If at any time the number rises to 6 I will know that the most recent obstacle is invalid. But I am not sure how to determine this easily.
    temp.PNG
     
    God0fMagic, Feb 17, 2020
    #1

  2. DwinTeimlon

    DwinTeimlon

    Joined:
    Feb 25, 2016
    Posts:
    296
    You could actually block the generation of NavMeshes on the top of those obstacles by using NavMeshModifers.
     
    Last edited: Feb 18, 2020
    DwinTeimlon, Feb 18, 2020
    #2

  3. God0fMagic

    God0fMagic

    Joined:
    Feb 8, 2019
    Posts:
    16
    Yes, that is what I am doing at the moment. But I want to know if those added NavMeshModifiers will not make areas of the NavMesh inaccessible. Like placing a row of them across the field separating it in two.
     
    God0fMagic, Feb 19, 2020
    #3

  4. DwinTeimlon

    DwinTeimlon

    Joined:
    Feb 25, 2016
    Posts:
    296
    It would be still one NavMesh, but you would not be able to cross the field with an agent, but I do not get your point tbh.
     
    DwinTeimlon, Feb 20, 2020
    #4

  5. God0fMagic

    God0fMagic

    Joined:
    Feb 8, 2019
    Posts:
    16
    I want to know that after adding a new NavMeshModifier I would still be able to access all the objects within the field.
    Checking if agent can access all of objects from all starting points seem to be a lot of calculations.
    If I can check that, I will know that the last placed NavMeshModifier is not possible and I would be able to remove it so that all areas are accessible again
     
    God0fMagic, Feb 21, 2020
    #5