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README.md

Mixbox for Godot

var Mixbox = preload("res://addons/mixbox/mixbox.gd")

var color1 = Color(0.0, 0.129, 0.522) # blue
var color2 = Color(0.988, 0.827, 0.0) # yellow
var t = 0.5                           # mixing ratio

var color_mix = Mixbox.lerp(color1, color2, t)

print(color_mix)

Mixing Multiple Colors

var z1 = Mixbox.rgb_to_latent(color1)
var z2 = Mixbox.rgb_to_latent(color2)
var z3 = Mixbox.rgb_to_latent(color3)

var z_mix = []
z_mix.resize(Mixbox.LATENT_SIZE)

for i in z_mix.size():          # mix together:
    z_mix[i] = (0.3*z1[i] +     # 30% of color1
                0.6*z2[i] +     # 60% of color2
                0.1*z3[i])      # 10% of color3

var color_mix = Mixbox.latent_to_rgb(z_mix)

Shader

shader_type canvas_item;

uniform sampler2D mixbox_lut; // attach "addons/mixbox/mixbox_lut.png" here

uniform vec4 color1 : hint_color = vec4(0.0, 0.129, 0.522, 1.0); // blue
uniform vec4 color2 : hint_color = vec4(0.988, 0.827, 0.0, 1.0); // yellow

// #include only works in Godot 4, if you are on Godot 3.X
// you will need to paste the Mixbox code here manually.
#include "addons/mixbox/mixbox.gdshaderinc"

void fragment() {
    COLOR = mixbox_lerp(color1, color2, UV.x);
}

Mixing Multiple Colors

mat3 z1 = mixbox_rgb_to_latent(color1.rgb);
mat3 z2 = mixbox_rgb_to_latent(color2.rgb);
mat3 z3 = mixbox_rgb_to_latent(color3.rgb);

// mix together 30% of color1, 60% of color2, and 10% of color3
mat3 z_mix = 0.3*z1 + 0.6*z2 + 0.1*z3;

vec3 rgb_mix = mixbox_latent_to_rgb(z_mix);

VisualShader

Pigment Colors

Pigment RGB Float RGB Linear RGB
Cadmium Yellow 254, 236, 0 0.996, 0.925, 0.0 0.991, 0.839, 0.0
Hansa Yellow 252, 211, 0 0.988, 0.827, 0.0 0.973, 0.651, 0.0
Cadmium Orange 255, 105, 0 1.0, 0.412, 0.0 1.0, 0.141, 0.0
Cadmium Red 255, 39, 2 1.0, 0.153, 0.008 1.0, 0.02, 0.001
Quinacridone Magenta 128, 2, 46 0.502, 0.008, 0.18 0.216, 0.001, 0.027
Cobalt Violet 78, 0, 66 0.306, 0.0, 0.259 0.076, 0.0, 0.054
Ultramarine Blue 25, 0, 89 0.098, 0.0, 0.349 0.01, 0.0, 0.1
Cobalt Blue 0, 33, 133 0.0, 0.129, 0.522 0.0, 0.015, 0.235
Phthalo Blue 13, 27, 68 0.051, 0.106, 0.267 0.004, 0.011, 0.058
Phthalo Green 0, 60, 50 0.0, 0.235, 0.196 0.0, 0.045, 0.032
Permanent Green 7, 109, 22 0.027, 0.427, 0.086 0.002, 0.153, 0.008
Sap Green 107, 148, 4 0.42, 0.58, 0.016 0.147, 0.296, 0.001
Burnt Sienna 123, 72, 0 0.482, 0.282, 0.0 0.198, 0.065, 0.0

License

Copyright (c) 2022, Secret Weapons. All rights reserved.
Mixbox is provided under the CC BY-NC 4.0 license for non-commercial use only.
If you want to obtain commercial license, please contact: [email protected]