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In this Discussion
Easier use of lua shaders
hgy29
Maintainer
Hi all,
Lua shaders is a fantastic feature of Gideros, I use them a lot myself but one need a bit of understanding about how they work and how to set them up in Gideros to actually take advantage of it. They became much more easier to write thanks to Luau, but even I still need to look at my previous code and Gideros built in shaders to use them again.
So I decided to write an utility class to help with that. It contains all gideros standard shaders re-written in lua so that you can just query for a standard lua shader template for a specific use, change the part you want (usually the frargment shader), and use it.
Example:
I share it now, but I will make it part of luashader library in next Gideros.
Lua shaders is a fantastic feature of Gideros, I use them a lot myself but one need a bit of understanding about how they work and how to set them up in Gideros to actually take advantage of it. They became much more easier to write thanks to Luau, but even I still need to look at my previous code and Gideros built in shaders to use them again.
So I decided to write an utility class to help with that. It contains all gideros standard shaders re-written in lua so that you can just query for a standard lua shader template for a specific use, change the part you want (usually the frargment shader), and use it.
Example:
application:setBackgroundColor(0) local font = TTFont.new("OpenSans-ExtraBold.ttf", 40, "") local tf = TextField.new(font, "Funny colored text") tf:setLayout{w = 400, h = 100, flags = 1280|FontBase.TLF_CENTER|FontBase.TLF_VCENTER} tf:setPosition(0,40) tf:setTextColor(0xFFFFFF,1) stage:addChild(tf) local shader=StandardShaders:getShaderSpecification(Shader.SHADER_PROGRAM_TEXTUREALPHA) function shader.fragmentShader() : Shader local frag=lF4(fColor)*texture2D(fTexture, fTexCoord).aaaa frag.r=(sin(fTexCoord.x*300)+1)/2 frag.g=(cos(fTexCoord.y*300)+1)/2 frag.b=(cos((fTexCoord.y+fTexCoord.x)*100)+1)/2 if (frag.a==0.0) then discard() end return frag end tf:setShader(shader:build()) |
lua
lua
stdluashaders.lua
10K
Likes: keszegh, pie, MoKaLux, SinisterSoft
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Comments
https://deluxepixel.com
- copy the stdluashaders.lua to the luashader folder
- before the example code I needed to add this code (see: https://wiki.gideros.rocks/index.php/Loading_Order_of_Lua_Files):
PS: doesn't look so nice on my mobile
Likes: SinisterSoft, pie