Shadertoy Backgrounds

[NoonPersoner]

How do you guys add the moving backgrounds from Shadertoy to the engine?

[moxie-coder]

There’s a converter you can use here

https://theleername.github.io/ShadertoyToFlixel/

Ultimately the shaders are mostly from D&B and other things

[nate902011]

add your objects like you would do regularly then in a onCreate/onCreatePost function, you have to use setSpriteShader on the object you want the shader to be on, and the initLuaShader to start the shader; go here to learn how you can do this: https://shadowmario.github.io/psychengine.lua/pages/shaders.html. then add this onUpdate function somewhere in the .lua file:

function onUpdate(elapsed)
    setShaderFloat('your object', 'iTime', os.clock())
end

this will make the shader actually move and not be static (replace your object with the object you set the shader to be on)

[NoonPersoner]

Yeah im gonna be fr, i genuinely cannot do this alone for this one, im gonna need help from someone who could explain it easily

[nate902011]

use this as a template (taken from one of enzo's greenbi greenified backgrounds):

function onCreate()
        makeLuaSprite('bg', 'bg', -950, -550);
        scaleObject('bg', 2, 2);
        setLuaSpriteScrollFactor('bg', 0.4, 0.4);
        addLuaSprite('bg', false);

        initLuaShader("shaderbg1")
        setSpriteShader("bg", "shaderbg1")
end

function onUpdate(elapsed)
        setShaderFloat('bg', 'iTime', os.clock())
end

shaderbg1 is the shader your using
bg is the object

[JordanSantiagoYT]

although for iTime, id suggest using getSongPosition() instead of os.clock() as it means that the speed of the background will not fluctuate if you use something like Rendering Mode

[nate902011]

although for iTime, id suggest using getSongPosition() instead of os.clock() as it means that the speed of the background will not fluctuate if you use something like Rendering Mode

or it you pause the game