Add ledge getup, ledge intangibility limit & fix walk-off velocity

src/fighter/state/ledge_wait.rs

@@ -24,6 +24,13 @@ impl FighterStateImpl for LedgeWaitState {
         } else if state_context.input.has_command(FighterCommands::TapJump) {
             return Some(FighterState::LedgeAction(LedgeActionState::create_jump(self.ledge_id, JumpStateInitiator::Tap)));
         }
+
+        if is_ledge_getup_input(state_context.input.get_last_frame().movement.x,
+            state_context.game_settings.input_common.run_stick_threshold,
+            state_context.facing_direction) {
+                return Some(FighterState::LedgeAction(LedgeActionState::create_getup(self.ledge_id)));
+        }
+
         if is_ledge_drop_input(state_context.input.get_last_frame().movement.x,
             state_context.game_settings.input_common.run_stick_threshold,
             state_context.facing_direction) {
@@ -58,14 +65,20 @@ impl FighterStateImpl for LedgeWaitState {
     fn on_enter(&mut self, state_context: &mut EnterContext) {
         state_context.velocity.0 = FGVec2::ZERO;
         state_context.knockback_velocity.0 = FGVec2::ZERO;
-        *state_context.vulnerability = FighterInvulnerabilityState::Intangible {
-            frames_remaining: Some(
-                state_context
+        
+        if state_context.ledge_info.grab_count < state_context.game_settings.fighter_common.max_ledge_regrab_count {
+            *state_context.vulnerability = FighterInvulnerabilityState::Intangible {
+                frames_remaining: Some(
+                    state_context
                     .game_settings
                     .fighter_common
                     .ledge_grab_invulnerability_duration,
-            ),
-        };
+                ),
+            };
+        }
+
+        state_context.ledge_info.grab_count = state_context.ledge_info.grab_count.saturating_add(1);
+        
         let Some(ledge) = state_context.stage_collision.find_ledge_by_vertex(self.ledge_id) else {
             return;
         };
@@ -135,3 +148,18 @@ fn is_ledge_drop_input(
 
     false
 }
+
+fn is_ledge_getup_input(
+    horizontal_input: crate::math::int::FGi32,
+    threshold: crate::math::int::FGi32,
+    facing_dir: &FighterFacingDirection,
+) -> bool {
+    let dir = facing_dir.to_sign();
+    if horizontal_input.abs() > threshold {
+        if dir == horizontal_input.signum() {
+            return true;
+        }
+    }
+
+    false
+}