Entry Function (kiss_bevy attribute)

kiss_bevy is the macro attribute used to dictate the entry function.

use bevy::prelude::*;
use bevy_kissing_godot::prelude::*;

#[kiss_bevy(node_name = PoopPeeKisser)]
fn main(app: &mut App) {
	// do stuff with app
}

Declaration and Arguments

In addition to the autoload Node name argument, it has two more optional arguments. The declaration could be seen as something like this (assume Option arguments are optional):

kiss_bevy(
	node_name = Ident,
	process_wrapper = Option<Path>,
	physics_process_wrapper = Option<Path>,
)

process_wrapper and physics_process_wrapper can be assigned paths to macros that take two expression arguments:

• The first is the original expression that would be generated if the macro wasn’t passed.
• The second is the self expression for the autoload Node.

process_wrapper wraps the process expression of the generated Bevy app node. physics_process_wrapper does the same, but for the physics_process.

Example

For example, you can configure panic capturing like this:

use bevy::prelude::*;
use bevy_kissing_godot::prelude::*;

/// Wraps the process call with a panic catcher.
macro_rules panic_catcher {
	($original_expression: expr, $self: expr) => {
		let result = std::panic::catch_unwind(|| {
			$original_expression
		});
		if result.is_err() {
			println!("Panic happened!");

			// Check bevy_kissing_godot::kissing_app for all `self.app` functions.
			$self.app.clear_app();
		}
	}
}

#[kiss_bevy(
	node_name = MyAppNodeName,
	process_wrapper = panic_catcher,
	physics_process_wrapper = panic_catcher
)]
fn main(app: &mut App) {
	// Do stuff with `app`...
}