Blur effect

Comments

• keszegh Member

  August 2019

  you should render to a rendertarget the sprites that you want to blur and apply the shader to the bitmap that has this rendertarget as texture.

  Longtitle Productions, creator of
  Fragmenter - animated loop machine and IKONOMIKON - the memory game

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• tetnic Member

  August 2019

  I need to blur "everything" that is under a certain sprite, so to use a rendertarget I need to calculate the correct portions of all sprites on the stage and copy them into the rendertarget accordingly, but I think it will be very costly, especially in occurrence of moving objects.
  
  Obvuoisly, the best will be to copy the state of the color buffer into the rendertarget,
  but it is possible only if is there a way to interface Lua code with the rendering pipeline.
  
  Anyway, thank you for your idea, I'll try it and if an acceptable solution comes out I'll share it.

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• tetnic Member

  August 2019

  Another idea for experts. Maybe the trick can be obtained using a ViewPort for the same sprites added to the stage, and applying to it the blur effect???

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• keszegh Member

  August 2019

  viewport should also work, but i think you cannot apply a shader to it, so at some point you need to render to a rendertarget anyhow.

  Longtitle Productions, creator of
  Fragmenter - animated loop machine and IKONOMIKON - the memory game

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• oleg Member

  August 2019

  Somewhere in the forum was an example of how to apply a mask shader.

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• antix Member

  August 2019

  Doesn't one of the supplied examples feature blurring?

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• tetnic Member

  August 2019

  @antix yes, but it can blur only the sprite to which the shader is applied, what I want to achieve is the blur to have effect also on the content that is under that sprite.

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• antix Member

  August 2019

  @tetnic ahh I see. In this case I think you will have to use the RenderTarget method that @keszegh mentioned.
  
  He is also correct in that this method will be costly. I created something similar but for normal mapping and it was very slow on my older devices.

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