movement affected by walking in water

src/control/controller.rs

@@ -50,6 +50,10 @@ pub struct PlayerMovement {
 #[reflect(Component)]
 pub struct MovementAcceleration(Scalar);
 
+#[derive(Component, Reflect)]
+#[reflect(Component)]
+pub struct MovementSpeedFactor(pub f32);
+
 /// The strength of a jump.
 #[derive(Component, Reflect)]
 #[reflect(Component)]
@@ -85,6 +89,7 @@ pub struct MovementBundle {
     acceleration: MovementAcceleration,
     jump_impulse: JumpImpulse,
     max_slope_angle: MaxSlopeAngle,
+    factor: MovementSpeedFactor,
 }
 
 impl MovementBundle {
@@ -93,6 +98,7 @@ impl MovementBundle {
             acceleration: MovementAcceleration(acceleration),
             jump_impulse: JumpImpulse(jump_impulse),
             max_slope_angle: MaxSlopeAngle(max_slope_angle),
+            factor: MovementSpeedFactor(1.),
         }
     }
 }
@@ -173,6 +179,7 @@ fn movement(
     controls: Res<Controls>,
     mut controllers: Query<(
         &MovementAcceleration,
+        &MovementSpeedFactor,
         &JumpImpulse,
         &mut LinearVelocity,
         Has<Grounded>,
@@ -194,7 +201,8 @@ fn movement(
 
     direction = direction.normalize_or_zero();
 
-    for (movement_acceleration, jump_impulse, mut linear_velocity, is_grounded) in &mut controllers
+    for (movement_acceleration, factor, jump_impulse, mut linear_velocity, is_grounded) in
+        &mut controllers
     {
         let mut direction = direction.extend(0.0).xzy();
 
@@ -203,8 +211,8 @@ fn movement(
                 (rig_transform.forward() * direction.z) + (rig_transform.right() * direction.x);
         }
 
-        linear_velocity.x = -direction.x * movement_acceleration.0 * delta_time;
-        linear_velocity.z = -direction.z * movement_acceleration.0 * delta_time;
+        linear_velocity.x = -direction.x * movement_acceleration.0 * delta_time * factor.0;
+        linear_velocity.z = -direction.z * movement_acceleration.0 * delta_time * factor.0;
 
         if is_grounded && jump_requested && !*jump_used {
             linear_velocity.y = jump_impulse.0;