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# ceramic
  • b
    Yes, it's possible, but undocumented at the moment
  • b
    Unfortunately I don't even have any public example to share at the moment because the existing code I have doing that is closed source, but I plan to add a proper guide and example on ceramic website to do that
  • b
    Can't promise when that will be ready though
  • f
    how do i get the set alpha value in the glsl?
  • b
    In GLSL, a fragment shader returns a color (RGBA). So you need to set the alpha value correctly
  • b
    You also need to take into account that the graphics are rendered using premultiplied alpha, so you need to multiply your alpha value with rgb value in the pixel you return
  • f
    i know glsl, i made the whole thing with palette changing
  • f
    my question is, the visual's 
    alpha
    , how do i access that value in glsl so that i can use it to change the color appropriately
  • b
    It’s the color attribute’s alpha value
  • b
    Just look at the default shaders, they are using it
  • f
    that worked
  • f
    i'd like to give android another try
  • f
    but it feels like the guide is for people who already develop for mobile
  • f
    because there are apparently numerous additional things i need to do to set up haxe?
  • f
    and i don't know what those are
  • f
    Copy code
    PS C:\devel\ceramic-samples\pixel-platformer> ceramic clay run windows
Will build with configuration Run for target windows (Windows).
Skip haxe compilation
Compile C++
Creating C:/devel/ceramic-samples/pixel-platformer/out/clay/windows/cpp/obj/msvc1964-nc/__pch/haxe/hxcpp.pch...
hxcpp.cpp

Compiling group: haxe
....
Error: __boot__.cpp
include\ceramic/_AlphaColor/AlphaColor_Impl_.h(55): error C2059: syntax error: 'constant'
include\ceramic/_AlphaColor/AlphaColor_Impl_.h(55): error C2238: unexpected token(s) preceding ';'
  • f
    So I'm getting the above error message when trying to run the platformer example on the windows target
  • f
    Also the pixel platformer gets really choppy whenever I change the window size on the electron build
  • b
    That’s odd, I’ll take a look at that one
  • b
    A video capture would help to see what you mean exactly
  • b
    Didn't notice any choppiness when changing the windows size on the electron build on my side. Sure the resolution being very low it can feel less and less smooth with a larger windows size, but that's it
  • b
    Found the build issue on windows, it's been broken recently because of some weird windows build behaviour and a change in AlphaColor. I will push a new release of Ceramic today with a fix!
  • b
  • f
    Copy code
    Run haxe compiler
Error: Error: Cannot process [arcade]: Library arcade is not installed : run 'haxelib install arcade'
Error when running clay run with target windows. (status = 1)
PS C:\devel\ceramic-samples\pixel-platformer> haxelib install arcade
Error: Failed with error: No such Project : arcade
PS C:\devel\ceramic-samples\pixel-platformer> ceramic clay libs                        
Error: Failed with error: No such Project : arcade
Failed to install arcade
    Now the arcade plugin seems to be missing from haxelib
  • b
    haxelib install arcade
    won't be any helpful here
  • b
    You can try to delete the 
    .haxelib
    directory of your project and try to build again (
    ceramic clay run windows --setup --assets
    )
  • b
    If it still doesn't work there is probably something wrong with your Ceramic installation
  • f
    I deleted the .haxelib directory in the project, as well as removed ceramic from the home directory, re-installed ceramic globally and ran
    Copy code
    ceramic clay run windows --setup --assets
    again and got the same message
  • b
    What does the 
    haxelib version
    command give you?
  • b
    (and what 
    ceramic path
    command give you?)
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