1 files changed, 13 insertions(+), 1 deletions(-)

M crates/unified/src/server/player.rs

@@ 118,7 118,14 @@ fn player_thrust(
 
         let forward = (transform.rotation * Vec3::Y).xy();
         let mut external_force = ExternalForce::default();
-        let mut thrusters = [0.0; 4]; // counterclockwise wrt +y axis
+
+        // indices are quadrants:
+        // 1 | 0
+        // --+--
+        // 2 | 3
+        //
+        let mut thrusters = [0.0; 4]; 
+
         if thrust.up {
             thrusters[1] = 1.0;
             thrusters[2] = 1.0;


@@ 135,6 142,11 @@ fn player_thrust(
             thrusters[1] = 1.0;
             thrusters[3] = 1.0;
         }
+
+        // prevent fuel wasting when turning while moving forward/reverse
+        if thrusters[2] == thrusters[3] && thrusters[3] != 0.0 { (thrusters[2], thrusters[3]) = (0.0, 0.0); }
+        if thrusters[0] == thrusters[1] && thrusters[1] != 0.0 { (thrusters[0], thrusters[1]) = (0.0, 0.0); }
+
         let half_size = Vec2::new(
             world_config.part.default_width / 2.0,
             world_config.part.default_height / 2.0,