Spread state context architecture (Fixes #18) (#30)

Reviewed-on: #30
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/turn.rs

@@ -1,4 +1,4 @@
-use super::{FighterStateContext, FighterStateImpl};
+use super::{CollisionContext, EnterContext, FighterStateImpl, InterruptContext, UpdateContext};
 use crate::fighter::animation::AnimKind;
 use crate::fighter::state::fall::FallState;
 use crate::fighter::state::ground::{self, GroundedMotionResult, GroundedStateCommon};
@@ -12,7 +12,7 @@ pub struct TurnState {
 
 impl FighterStateImpl for TurnState {
     const NAME: &'static str = "Turn";
-    fn check_interrupt(&self, state_context: &mut FighterStateContext) -> Option<FighterState> {
+    fn check_interrupt(&self, state_context: &mut InterruptContext) -> Option<FighterState> {
         // State chain that results in the turn completing
         if state_context.get_current_animation_frame()
             <= state_context
@@ -42,23 +42,22 @@ impl FighterStateImpl for TurnState {
         }
     }
 
-    fn on_enter(&mut self, state_context: &mut super::FighterStateContext) {
+    fn on_enter(&mut self, state_context: &mut EnterContext) {
         state_context.play_animation(AnimKind::Turn, false);
         *state_context.facing_direction = state_context.facing_direction.reverse();
     }
 
-    fn update(&mut self, state_context: &mut super::FighterStateContext) {
-        let friction = if state_context.velocity.x.abs()
-            > state_context.fighter_manifest.attributes.max_walk_vel
-        {
-            state_context.fighter_manifest.attributes.ground_friction
-                * state_context
-                    .game_settings
-                    .fighter_common
-                    .ground_friction_over_walk_speed_multiplier
-        } else {
-            state_context.fighter_manifest.attributes.ground_friction
-        };
+    fn update(&mut self, state_context: &mut UpdateContext) {
+        let friction =
+            if state_context.velocity.x.abs() > state_context.fighter_attributes.max_walk_vel {
+                state_context.fighter_attributes.ground_friction
+                    * state_context
+                        .game_settings
+                        .fighter_common
+                        .ground_friction_over_walk_speed_multiplier
+            } else {
+                state_context.fighter_attributes.ground_friction
+            };
 
         let ground_velocity = state_context.velocity.x;
 
@@ -73,7 +72,7 @@ impl FighterStateImpl for TurnState {
 
     fn check_collision_interrupt(
         &mut self,
-        state_context: &mut FighterStateContext,
+        state_context: &mut CollisionContext,
     ) -> Option<FighterState> {
         if let GroundedMotionResult::InAir =
             ground::collide_with_stage_grounded(state_context, &mut self.grounded_common, false)
@@ -86,7 +85,7 @@ impl FighterStateImpl for TurnState {
 }
 
 pub fn check_input(
-    state_context: &FighterStateContext,
+    state_context: &InterruptContext,
     grounded_common: &GroundedStateCommon,
 ) -> Option<FighterState> {
     let input_frame = state_context.input.get_last_frame();