GIDEROS LUA SHADERS DISCOVERY

MoKaLux

Ok, time to have some more fun with gideros: GIDEROS LUA SHADERS

I am playing around to see what I can understand from the gideros lua shader demo.



I have mixed two shaders wave + bloom and I see that I can get the outline of the character already

So my goal has become to "code" a shader to have the outline of my character

Please don't help me yet.

Relax cafe category

rrraptor

Im thinking about visual shader editor using ImGui and node editor.
It works with lua already (but only in docking branch )
https://github.com/MultiPain/Gideros_ImGui/blob/952ddd90a3cb54b8bdc4b3b793d2ad303025c6bb/main.cpp#L10346
So, I can give it a try.

MoKaLux

still trying to understand shaders
For normal shaders (glsl for example), I need 2 files: 1 for the vertex shader and 1 for the fragment shader. Then we pass them to Shader.new(...).

For lua shaders, we must include (or link to) Gideros\Library\luashader files in our projects. Then we write our vertex shader and our fragment shader in lua. Then lua shaders calls Shader.new(...).

Is that correct? I am trying to sort out shaders in the wiki

PS: there is a typo in luashader.lua?

function Shader.lua(vf,ff,opt,uniforms,attrs,varying,funcs,const,debug) local lang=Shader.getShaderLanguage() local mtd=Shader["lua_"..lang] assert(mtd,"Language not supported: "..lang) local _vshader,_fshader=mtd(vf,ff,opt,uniforms,attrs,varying,funcs or {},const) if funcs then for _,fg in ipairs(funcs) do fg.code=nil end end if debug then print("VSHADER_CODE:\n".._vshader) print("FSHADER_CODE:\n".._fshader) end if not vdebug then return Shader.new(_vshader,_fshader,Shader.FLAG_FROM_CODE|opt,uniforms,attrs) end end

vdebug is never declared?

hgy29

Oops, a left-over of a debug. The whole condition should be removed.