Bevy plugin to simulate and preview different types of Color Blindness.

annie

Last update: Nov 22, 2022

Related tags

Game development bevy_color_blindness

Overview

Bevy Color Blindness Simulation

video showing 4 cubes of different colors as the different modes cycle

Bevy plugin to simulate and preview different types of Color Blindness.

This lets you ensure that your game is accessible to all players by testing how it will be seen under different conditions. While this is important, please also consider not relying on color alone to convey important information to your players. A common option is to add identifying symbols, like in the game Hue.

Based on Alan Zucconi's post. Supports: Normal, Protanopia, Protanomaly, Deuteranopia, Deuteranomaly, Tritanopia, Tritanomaly, Achromatopsia, and Achromatomaly.

Using

First, add the following to your Cargo.toml:

bevy_color_blindness = "0.1.0"

Then, add the ColorBlindnessPlugin to your app, and add ColorBlindnessCamera to your main camera.

You can change the selected mode by inserting ColorBlindnessParams before the plugin. You can also skip this, and change the resource at any time in a system. Check out examples/main.rs for a more detailed example.

use bevy::prelude::*;
use bevy_color_blindness::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        // optional
        .insert_resource(ColorBlindnessParams {
            mode: Mode::Deuteranomaly,
            enable: true,
        })
        // add the plugin
        .add_plugin(ColorBlindnessPlugin)
        .add_startup_system(setup)
        .run();
}

fn setup(mut commands: Commands) {
    // set up your scene...

    // create the camera
    commands
        .spawn_bundle(Camera3dBundle {
          transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
          ..default()
        })
        // IMPORTANT: add this component to your main camera
        .insert(ColorBlindnessCamera);
}

Important note

This plugin only simulates how color blind players will see your game. It does not correct for color blindness to make your game more accessible. This plugin should only be used during development, and removed on final builds.

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Comments

Achromatomaly isn't real?

For some reason, the youtube algorithm decided that I was one of the 4,000 people to watch this this video which makes the argument that Achromatomaly isn't a real condition, but was something accidentally made up by a programmer in the 2000s who was extrapolating from Achromatopsia in a reasonable but non-valid way.

I don't know if we should leave it in for completeness, or provide some sort of warning that it's not a real color blindness, or maybe leave it in fully because it has some value for some other reason. I'm definitely not an expert on these matters either way so I just wanted to pass this news to you.

opened by Andrewp2 1
UI is unaffected

The effect doesn't apply to UI, whether it's Bevy's native UI or external UI like bevy_egui. This makes it hard to determine what the UI will look like to colorblind users.

opened by Veritius 0
Window rescaling doesn't change resolution of image for shader

When the post-processing effects are added to the camera, they match the current window. If the window is rescaled, the resolution remains the same, as well as only applying the effect to a similar region of the screen, which also cuts off anything outside it (not shown in video). Changing the setting doesn't fix the resolution.

https://user-images.githubusercontent.com/45957058/201458044-6e27ee7b-a459-4700-8346-477a616fe95f.mp4

opened by Veritius 0