2 files changed, 40 insertions, 0 deletions
diff --git a/src/content/entities/entity_wizard.rs b/src/content/entities/entity_wizard.rs
index 3787e49..a74d9ff 100644
--- a/src/content/entities/entity_wizard.rs
+++ b/src/content/entities/entity_wizard.rs
@@ -14,6 +14,12 @@ use crate::{
     },
 };
 
+#[derive(PartialEq, Eq)]
+enum FacingDirection {
+    Left,
+    Right,
+}
+
 struct WizardEntityBehaviour {
     movement_input_x: f32,
     jump: f32,
@@ -21,6 +27,9 @@ struct WizardEntityBehaviour {
     grounded: bool,
     acc_vel: Vec2,
     kinematic_controller: KinematicCharacterController,
+
+    facing_direction: FacingDirection,
+    facing_strength: f32,
 }
 
 const JUMP_VELOCITY: f32 = 100.0;
@@ -28,6 +37,15 @@ const ACCEL: f32 = 1000.0;
 const AIR_ACCEL: f32 = 350.0;
 const MAX_SPEED: f32 = 75.0;
 
+impl WizardEntityBehaviour {
+    fn set_facing_dir(&mut self, update_ctx: &mut EntityUpdateCtx, dir: FacingDirection) {
+        if self.facing_direction != dir {
+            update_ctx.entity_data.cells.as_mut().unwrap().flip_x();
+            self.facing_direction = dir;
+        }
+    }
+}
+
 impl EntityBehaviour for WizardEntityBehaviour {
     fn update(&mut self, _: &mut EntityUpdateCtx, ctx: &mut SimCtx, _: f32) {
         if ctx.input_manager.held(Input::Left) {
@@ -167,6 +185,14 @@ impl EntityBehaviour for WizardEntityBehaviour {
 
         rb.set_linvel(movement.translation / delta_time, true);
 
+        self.facing_strength = (self.facing_strength + movement.translation.x).clamp(-2.0, 2.0);
+
+        if self.facing_strength > 1.0 {
+            self.set_facing_dir(update_ctx, FacingDirection::Right);
+        } else if self.facing_strength < -1.0 {
+            self.set_facing_dir(update_ctx, FacingDirection::Left);
+        }
+
         self.grounded = movement.grounded;
     }
 }
@@ -193,6 +219,8 @@ pub fn entity_wizard_def(position: Vec2) -> EntityDef {
             grounded: false,
             acc_vel: Vec2::ZERO,
             kinematic_controller,
+            facing_direction: FacingDirection::Right,
+            facing_strength: 0.0,
         })),
     )
 }
diff --git a/src/sim/entity/mod.rs b/src/sim/entity/mod.rs
index 59479a2..61f9d84 100644
--- a/src/sim/entity/mod.rs
+++ b/src/sim/entity/mod.rs
@@ -34,6 +34,18 @@ impl EntityCells {
             .fold(0.0, |acc, cur| acc + cur.material.def().density as f32)
             * MASS_SCALING
     }
+
+    pub fn flip_x(&mut self) {
+        let mut new_cells = Vec::with_capacity(self.cells.len());
+        for y in 0..self.size.y {
+            for rx in 0..self.size.x {
+                let x = self.size.x - rx - 1;
+                new_cells.push(self.get_cell_at_local_position(IVec2::new(x, y)));
+            }
+        }
+
+        self.cells = new_cells;
+    }
 }
 
 impl Marchable for EntityCells {