Custom Shaders discussion

[Lobby]

For better overview I moved discussions about custom shaders to here. Here you can also suggest changes to the tutorial.

To go to the tutorial: The Custom Shaders documentation

[Bevise]

I don't comprehend it at all. Maybe I should try out the plugin. ._.

[Simon142]

YOOOO nice. I kinda know glsl, imma make my first shader plugin!

[PixelDubs]

To be honest probably won't be using this, can't use GLSL, when I start developing BetterTT I will not be using shaders as the project would take forever as it is.

[PixelDubs]

I also think shaders won't be used much too.

[Simon142]

Does the existence of type IDs shader imply there is a way to get pixel's type (part of GUI, text, or tile)? If so, how can I make something similar too? I'd like to make it so my shaders don't affect game UI.

Also, is/will there be the source code reveal of fancy/X fancy shaders?

[Bearbear76]

Does the existence of type IDs shader imply there is a way to get pixel's type (part of GUI, text, or tile)? If so, how can I make something similar too? I'd like to make it so my shaders don't affect game UI.

Also, is/will there be the source code reveal of fancy/X fancy shaders?

True the game UI was bearly visible with your plugin if I remember correctly.

[IlikeBurgerHam]

How do you recreate the LOL shader that's in-game? Like what's the code?

[Simon142]

Does the existence of type IDs shader imply there is a way to get pixel's type (part of GUI, text, or tile)? If so, how can I make something similar too? I'd like to make it so my shaders don't affect game UI.

Also, is/will there be the source code reveal of fancy/X fancy shaders?

True the game UI was bearly visible with your plugin if I remember correctly.

I think most UI was visible, but only some light grey text in settings wasn't

[Simon142]

Does the existence of type IDs shader imply there is a way to get pixel's type (part of GUI, text, or tile)? If so, how can I make something similar too? I'd like to make it so my shaders don't affect game UI.

Also, is/will there be the source code reveal of fancy/X fancy shaders?

True the game UI was bearly visible with your plugin if I remember correctly.

Fixed now

[Hadestia]

What's the uniform type for night animations

[Hadestia]

Here I provided some alternative function from glsl that the game doesn't have

Show

step()

step generates a step function by comparing x to edge

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float step(float x, float edge) {
	return (x < edge) ? 0.0 : 1.0;
}

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simple fract()

returns the fractional part of x.

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float fract(float x) {
	return (x - floor(x));
}

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mix()

mix performs a linear interpolation between x and y using a to weight between them

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//@param A Vector3
//@param B Vector3
//@param a Alpha
//@return Vector3
vec3 mix(vec3 A, vec3 B, float a) {
	return vec3(A * (1.0 - a) + B * a);
}

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overlay()

overlay a foreground color from background color

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//@param base Vector3 background color
//@param blend Vector3 foreground color
//@return Vector3
vec3 overlay(vec3 base, vec3 blend) {
    return vec3(
         base.r < 0.5 ? (2.0 * base.r * blend.r) : (1.0 - 2.0 * (1.0 - base.r) * (1.0 - blend.r)),
         base.g < 0.5 ? (2.0 * base.g * blend.g) : (1.0 - 2.0 * (1.0 - base.g) * (1.0 - blend.g)),
         base.b < 0.5 ? (2.0 * base.b * blend.b) : (1.0 - 2.0 * (1.0 - base.b) * (1.0 - blend.b))
    );
}

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using screen resolution

Since 1.10.83 Drawing.setUniform() was available, we could just include this on our script:
uniform.lua

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local w,  h = Drawing.getSize() 
Drawing.setUniform('Resolution',  (w + .0),  (h + .0))  -- we need to ensure that our values are in float format

Interactive Lua editor

Run

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...

However user Resolution change over time depending on user choice in game settings, so I don't think this would be updated in runtime, Anyway our fragment shader will look like to use our uniform.

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... 
uniform vec2 Resolution; //Drawing.getSize()  returns 2 values so our uniform would be vec2
... 

void main()  {
    // use our uniform as example: 
    // Resolution.x = screen width or Resources.r
    // Resolution.y = screen height or Resolution.g
    if (Resolution.x >= 10.0 || Resolution.y <= 10.0)  {
        //your code
    }
}

Feel free to correct me if you nnotice something wrong.

[GreenKeldeo]

It's been a *very* long time since I last did anything with TheoTown, but I'm pleased to see at least some graphical scripting support available. Does the game process a depth buffer when rendering? If so, I might try my hand at scripting a PBR handler when I eventually have some spare time.