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    Light effects

    totebototebo Member
    edited February 2016 in General questions
    I've been following the development of http://antonkudin.tumblr.com/ by Anton Kudin, developed in Unity. Needless to say it's a work of art in terms of polish and physics, but the thing I'm interested in are the lighting effects used.

    How would you go about doing this in Gideros? Fake it with bitmaps? Shaders (is it possible to use shaders with Gideros)? An "out there" idea I had was to divide the screen in, say, 256x128 squares in a Mesh and manipulate them as pixels.

    Thoughts and brainstormy ideas appreciated!
    My Gideros games: www.totebo.com
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    Comments

    • tkhnomantkhnoman Member
      edited February 2016
      The easiest way is of course, using shaders.
      Considering object at that game also react on lighting, you would need to do something like Sprite Lamp, probably...
      http://store.steampowered.com/app/316830/

      It is possible to use Shader on Gideros, but it still hard, because you need to really understand about it when using it

      Well, i myself not a fan for lighting effect like that, and i didn't plan to use (since it feels too generic somehow) so that's all from me.

      Likes: totebo

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    • hgy29hgy29 Maintainer
      I think you can use bitmaps with white to transparent gradient, and use alpha blending options along with color transform.

      Likes: totebo, antix

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    • totebototebo Member
      @tkhnoman, good info and link. Cheers!

      @hgy29, yeah that's what I meant by faking it with bitmaps. Depending on what you want, this is probably the cheapest option in terms of time and effort.

      About shaders, is abstracting them so a mere mortal can use them going to be implemented at some point?
      My Gideros games: www.totebo.com
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    • hgy29hgy29 Maintainer
      I am afraid they can't be abstracted, given that drawing performance directly depends on the way the shader is written and only the programmer can know how to make best use of the GPU for the effect he wants to achieve.

      But thanks to gideros writing shaders is not such a painful task, since you can quickly test and iterate and see what happens. Best way is to start from an existing code. One of the pitfalls is that some graphic cards are more permissives than others, letting you write non compliant code and making you think everything is fine...

      Likes: totebo

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    • SinisterSoftSinisterSoft Maintainer
      A shader 'tutorial' and lots of examples are needed on the forum I think...

      Likes: keszegh, pie, antix, totebo

      Coder, video game industry veteran (since the '80s, ❤'s assembler), arrested - never convicted hacker (in the '90s), dad of five, he/him (if that even matters!).
      https://deluxepixel.com
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    • antixantix Member
      There are a few shader examples (Bird Animation 2, Blur, Normal Mapping, Bloom) included in Gideros now and there are some neat sites like https://www.shadertoy.com/ and http://glslsandbox.com/ to get ideas from.

      I do agree some tutorials would be cool too though :bz

      Likes: totebo

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    • totebototebo Member
      Thanks guys. Yeah, without a nice simple API I would want a lot of hand holding.

      Likes: antix

      My Gideros games: www.totebo.com
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    • antixantix Member
      @totebo - I agree :)

      Likes: totebo

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