Apply a pixelation effect to any Bevy mesh or scene without post-processing.

Jan Hohenheim

Last update: Mar 25, 2023

Related tags

Overview

Pixelate Mesh

Apply a pixelation effect to any Bevy mesh or scene without post-processing.

Usage

Add the PixelateMeshPlugin, where you specify a component that tracks the main camera.
Add this tracking component to your camera.
Add the Pixelate component to any entity that you want to pixelate.

The tracking component is needed because the plugin draws the textures on 2D canvases that need to rotate to always face the main camera.

Compatibility

bevy	pixelate_mesh
0.10	0.1

Examples

The following is an annotated minimal example. More can be found in the examples folder.

use bevy::prelude::*;
use pixelate_mesh::prelude::*;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        // Add the plugin
        .add_plugin(PixelateMeshPlugin::<MainCamera>::default())
        .add_startup_system(setup)
        .run();
}

// Create a component for the main camera
#[derive(Component)]
struct MainCamera;

fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    commands.spawn((
        // This cube will render at 64x64 pixels
        Pixelate::splat(64),
        PbrBundle {
            mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
            material: materials.add(Color::WHITE.into()),
            ..default()
        },
    ));

    commands.spawn((
        // Add the tracking component to the camera
        MainCamera,
        Camera3dBundle {
            transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
            ..default()
        },
    ));
}

Inspiration

The plugin tries to emulate the effect as seen in Prodeus:

Prodeus.-.Models.vs.Sprites.mp4

Source

Shortcomings

The current setup does not work with multiple main cameras. Feel free to comment on the issue if you have an idea for how to fix this!
The plugin deactivates MSAA globally.

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Comments

WIP: Add support for removing pixelation effect

I've fixed some bugs in the code where the cameras and canvas entity was compared with the pixelated entity instead of the target of Canvas and Camera.

I haven't really figured out what is left do do. Maybe We need to store the Original Handle<Mesh> And reinsert it in despawn_dependent_types.

I could use some help on this one @janhohenheim

opened by naasblod 3
Support Orthographic Projection

I was looking at this as a way to generate what looks like a 2D sprite based game easily by using 3D meshes and this plugin to simulate sprites but with dynamic lighting.

Much like the transform is being copied from the main camera, I think it would be possible to also copy the projection from the main camera onto the pixelation camera.
enhancement

opened by orclev 3