Initial work on rollback and refactor

src/fighter/debug.rs

@@ -0,0 +1,30 @@
+//! Fighter debug views: gizmos and the egui inspector window.
+
+use bevy::{color::palettes::css::YELLOW, prelude::*};
+use bevy_egui::{EguiContexts, egui};
+
+use crate::fighter::state::StateNameDebug;
+use crate::fighter::{FighterECB, FighterTranslation, FighterVelocity};
+use crate::input::FighterInput;
+
+pub fn debug_draw_ecb(ecbs: Query<(&FighterECB, &FighterTranslation)>, mut gizmos: Gizmos) {
+    for (ecb, trf) in ecbs {
+        let transformed = ecb.to_3d_lineloop(Transform::from_xyz(trf.x, trf.y, 0.0));
+        gizmos.lineloop(transformed, YELLOW);
+    }
+}
+
+pub fn fighter_debug(
+    mut contexts: EguiContexts,
+    query: Query<(&FighterVelocity, &FighterInput, &StateNameDebug)>,
+) -> Result {
+    for (vel, input, name) in query {
+        egui::Window::new("Hello").show(contexts.ctx_mut()?, |ui| {
+            ui.label(format!("State: {}", name.0));
+            ui.label(format!("{:?}", vel));
+            ui.label(format!("{:?}", input.get_last_frame()));
+        });
+    }
+
+    Ok(())
+}