movement tiny cleanup

Source/Game/Player/PlayerMovement.cs

@@ -58,6 +58,7 @@ namespace Game
         private const float jumpBoostVelocity = 100f;
         private const int jumpBoostMaxJumps = 2;
         private const bool jumpStairBehavior = true;
+        private const bool jumpAdditive = true;
 
         private const float maxAirSpeed = 320f;
         private const float maxAirStrafeSpeed = 30f;
@@ -964,14 +965,18 @@ namespace Game
             // Reset velocity from gravity
             if (-Vector3.Dot(Gravity.Normalized, velocity) < 0 &&
                 Vector3.Dot(velocity, traceGround.hitNormal) < -0.1)
+            {
                 velocity = Vector3.ProjectOnPlane(velocity, traceGround.hitNormal);
+            }
 
-            velocity += Vector3.Up * jumpVel;
-
-            bool ktjump = true;
-            if (ktjump)
+            if (jumpAdditive)
+            {
+                velocity += Vector3.Up * jumpVel;
                 if (velocity.Y < jumpVel)
                     velocity.Y = jumpVel;
+            }
+            else
+                velocity = Vector3.Up * jumpVel;
 
             onGround = false;