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Cal UI collider without corner space

Discussion in 'UGUI & TextMesh Pro' started by manlaikin1994, Jan 21, 2016.

  1. manlaikin1994

    manlaikin1994

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    May 15, 2015
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    Screen Shot 2016-01-21 at 10.17.19 AM.png

    i want to ask is there anyway to make the actually collider in UGUI?
     
    manlaikin1994, Jan 21, 2016
    #1

  2. karl_jones

    karl_jones

    Unity Technologies

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    By collider do you mean for clicking on or physics?
    As in you only want to detect a click when the mouse is over a pixel that does not have 0 alpha?
     
    karl_jones, Jan 22, 2016
    #2

  3. manlaikin1994

    manlaikin1994

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    yehyeh, i mean clicking.
    i only want to detect a click when the mouse is over a pixel that does not have 0 alpha
     
    manlaikin1994, Jan 22, 2016
    #3

  4. manlaikin1994

    manlaikin1994

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    i still cannot find solution from web, does anyone know?
     
    manlaikin1994, Jan 24, 2016
    #4

  5. eses

    eses

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    eses, Jan 24, 2016
    #5

  6. karl_jones

    karl_jones

    Unity Technologies

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    Create a class that derives from ICanvasRaycastFilter that queries the pixel under the pointer and returns false if its zero alpha. Add this component to any objects you want to use the filter with.
     
    karl_jones, Jan 25, 2016
    #6

  7. eses

    eses

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    @karl.jones Thank you for this tip! I just wonder why this isn't implemented to button by default?
     
    eses, Jan 25, 2016
    #7

  8. karl_jones

    karl_jones

    Unity Technologies

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    well its not nearly as efficient. All textures need to be set as readable for this to work. Add It as a feature request if you want it.

    You could also use the 2d physics system which is supported and more efficient than reading pixels but less accurate.
     
    karl_jones, Jan 25, 2016
    #8
    eses likes this.