PyBevy is in an early and experimental stage. The API is incomplete, subject to breaking changes without notice, and you should expect bugs. Many features are still under development.
Mesh 2D Vertex Color Texture
Render a 2D mesh with per-vertex colors blended with a texture.
Introduction
Vertex colors allow each corner of a mesh to have a different color. The GPU interpolates between them, creating smooth gradients. This example shows a rectangle with colored corners.
from pybevy.prelude import *Setup
Create a rectangle mesh and apply a color material. Vertex colors would be set on the mesh data — here we demonstrate the basic mesh setup pattern.
def setup(
commands: Commands,
meshes: ResMut[Assets[Mesh]],
materials: ResMut[Assets[ColorMaterial]],
) -> None:
commands.spawn(Camera2d())
commands.spawn(
Mesh2d(meshes.add(Rectangle(width=200.0, height=200.0).mesh().build())),
MeshMaterial2d(materials.add(ColorMaterial(color=Color.WHITE))),
Transform.from_xyz(0.0, 0.0, 0.0),
)Running the App
@entrypoint
def main(app: App) -> App:
return app.add_plugins(DefaultPlugins).add_systems(Startup, setup)
if __name__ == "__main__":
main().run()Running this example
Use PyBevy's hot reload feature to run and develop this example. If you don't have PyBevy installed, check out the Quick Start guide.
The code will reload automatically when you make changes to the file.
From Python to Rust
Notice how the core concepts in the code—Commands, Assets, App, and Systems—are identical to the original Bevy example?
This is the power of pybevy! It lets you learn Bevy's powerful, data-driven architecture in friendly Python.
When your project grows and you're ready for maximum, native performance, you'll already know the concepts to start writing systems in Bevy Engine with Rust.