This crate adds an immediate mode drawing api to Bevy for visual debugging.
Example
# use bevy_gizmos::prelude::*;
# use bevy_render::prelude::*;
# use bevy_math::prelude::*;
fn system(mut gizmos: Gizmos) {
gizmos.line(Vec3::ZERO, Vec3::X, Color::GREEN);
}
# bevy_ecs::system::assert_is_system(system);
See the documentation on Gizmos for more examples.