Implement invulnerability/intangibility and sakurai angle (#78)

Reviewed-on: #78
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/air_dodge.rs

@@ -33,14 +33,9 @@ impl FighterStateImpl for AirDodgeState {
     }
 
     fn update(&mut self, state_context: &mut UpdateContext) {
-        let airdodge_intangible_end = state_context.fighter_attributes.air_dodge_intangible_start
-            + state_context
-                .fighter_attributes
-                .air_dodge_intangible_duration;
-        if state_context.animation_frame
-            == state_context.fighter_attributes.air_dodge_intangible_start
-        {
-            *state_context.vulnerability = FighterInvulnerabilityState::Intangible;
+        let airdodge_intangible_end = state_context.fighter_attributes.air_dodge_intangible_start + state_context.fighter_attributes.air_dodge_intangible_duration;
+        if state_context.animation_frame == state_context.fighter_attributes.air_dodge_intangible_start {
+            *state_context.vulnerability = FighterInvulnerabilityState::Intangible { frames_remaining: Some(state_context.fighter_attributes.air_dodge_intangible_duration) };
         } else if state_context.animation_frame >= airdodge_intangible_end {
             *state_context.vulnerability = FighterInvulnerabilityState::Vulnerable;
         }

src/fighter/state/angel.rs

@@ -1,4 +1,4 @@
-use crate::{fighter::{animation::AnimKind, state::{FighterState, FighterStateImpl, air::AirborneStateCommon, fall::FallState}}, math::vec::FGVec2};
+use crate::{fighter::{FighterInvulnerabilityState, animation::AnimKind, state::{FighterState, FighterStateImpl, air::AirborneStateCommon, fall::FallState}}, math::vec::FGVec2};
 
 #[derive(Debug, Clone, Hash)]
 pub struct AngelState {
@@ -38,6 +38,7 @@ impl FighterStateImpl for AngelState {
     fn on_enter(&mut self, state_context: &mut super::EnterContext) {
         state_context.play_animation(AnimKind::Wait, true);
         state_context.velocity.0 = FGVec2::ZERO;
+        *state_context.vulnerability = FighterInvulnerabilityState::Invulnerable { frames_remaining: Some(state_context.game_settings.fighter_common.angel_platform_invulnerability_duration) };
     }
     
     fn check_collision_interrupt(

src/fighter/state/mod.rs

@@ -161,6 +161,7 @@ pub struct EnterContext<'a> {
     pub facing_direction: &'a mut FighterFacingDirection,
     pub animation_frame: &'a mut FighterAnimationFrame,
     pub surface: &'a mut FighterSurfaceState,
+    pub vulnerability: &'a mut FighterInvulnerabilityState,
     pub fighter_attributes: &'a FighterAttributes,
     pub attack_script_assets: &'a FighterAttackScriptAssets,
     pub game_settings: &'a GameSettings,
@@ -329,6 +330,7 @@ impl<'w, 's> FighterFrameQueryItem<'w, 's> {
             facing_direction: &mut self.facing_direction,
             animation_frame: &mut self.animation_frame,
             surface: &mut self.surface,
+            vulnerability: &mut self.vulnerability,
             fighter_attributes: attributes,
             attack_script_assets,
             game_settings,
@@ -599,7 +601,11 @@ pub fn state_collision_interrupt_system(
 
         if pending_respawn.0 {
             **pending_respawn = false;
-            let respawn_state = FighterState::Angel(angel::AngelState::new(60 * 3));
+            let respawn_state = FighterState::Angel(angel::AngelState::new(
+                game_settings
+                    .fighter_common
+                    .angel_platform_invulnerability_duration,
+            ));
 
             // Find the angel platform position
             let respawn_point = stage_manifest