Painting holes with shader v1.0

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• Unity3D : Painting | arcadeindy 23/07/2012 at 09:59

  […] http://unitycoder.com/blog/2011/08/09/painting-holes-with-shader-v1-0/ […]

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  betty 24/10/2013 at 12:26

  What about doing the opposite?
  I mean, painting texture on a completely transparent object?

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    mgear 24/10/2013 at 22:36

    Make the mask initially black, and paint with white color.

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  Shekhar 05/11/2014 at 08:39

  I have assigned shader to multiple objects . when i edit one object all other objects also get erased..
  may be thats sound silly I am a new to unity. please help

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    mgear 07/11/2014 at 00:51

    I think it happens because if you place the same script on multiple objects and you paint one object, other objects will also register the raycast hit as true and will erase from that same position where it hits on the other object..

    so should modify the script and move it to camera..(and then paint on the raycast hit target only)

    or for a quick test, in the current script should check when the raycast is hitting, that is the hit target same as this object..

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      Shekhar 12/11/2014 at 13:28

      what modification s are neede so as to attach it to the camera… just want to say that your script is superb…

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    • 
      Shekhar 12/11/2014 at 14:24

      I did necessary changes and attached to the camera but still it doesnt work… it fails to do following part

      Vector2 pixelUV = hit.textureCoord;
      pixelUV.x *=tex.width;
      pixelUV.y *=tex.height;
      tex.SetPixel((int)pixelUV.x,(int)pixelUV.y, Color.black);
      tex.Apply();

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  Ashish 18/08/2016 at 15:32

  HI, How do we know if object is completely Erased or not.?

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    mgear 18/08/2016 at 16:26

    Every time you paint, could check that if pixel is not painted color, then increase pixel counter.. (until pixel counter equals total all pixels)

    Or after each click, go through all pixels and see which ones are painted and which ones not.

    Would be faster to use SetPixels32() array (and check from the array), instead of the invidual SetPixel()/GetPixel()

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    • 
      Ashish 19/08/2016 at 17:27

      Thanks for reply, Can you provide me the C# version of the Script with some Solving example related my Query. Hope you Don’t mind

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        mgear 19/08/2016 at 21:24

        Unfortunately no time at the moment..
        Try first yourself, post results/question in Unity forum, so others can help also 🙂

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          Ashish 22/08/2016 at 13:31

          ok thanks i will try 🙂