More multiplayer fixes

core/src/mindustry/core/NetServer.java

@@ -600,6 +600,8 @@ public class NetServer implements ApplicationListener{
 
         if(!player.dead()){
             Unitc unit = player.unit();
+
+            unit.vel().set(xVelocity, yVelocity).limit(unit.type().speed);
             long elapsed = Time.timeSinceMillis(connection.lastRecievedClientTime);
             float maxSpeed = player.dead() ? Float.MAX_VALUE : player.unit().type().speed;
             float maxMove = elapsed / 1000f * 60f * maxSpeed * 1.1f;
@@ -652,10 +654,6 @@ public class NetServer implements ApplicationListener{
 
             //read sync data so it can be used for interpolation for the server
             unit.readSyncManual(fbuffer);
-
-            //TODO clients shouldn't care about velocities, so should it always just get set to 0? why even save it?
-            //[[ignore sent velocity values, set it to the delta movement vector instead]]
-            //unit.vel().set(vector);
         }else{
             player.x(x);
             player.y(y);

core/src/mindustry/entities/comp/HitboxComp.java

@@ -1,6 +1,7 @@
 package mindustry.entities.comp;
 
 import arc.func.*;
+import arc.math.*;
 import arc.math.geom.QuadTree.*;
 import arc.math.geom.*;
 import mindustry.annotations.Annotations.*;
@@ -48,6 +49,14 @@ abstract class HitboxComp implements Posc, QuadTreeObject{
         return y - lastY;
     }
 
+    float deltaLen(){
+        return Mathf.len(deltaX(), deltaY());
+    }
+
+    float deltaAngle(){
+        return Mathf.angle(deltaX(), deltaY());
+    }
+
     boolean collides(Hitboxc other){
         return true;
     }

core/src/mindustry/entities/comp/MechComp.java

@@ -12,8 +12,8 @@ abstract class MechComp implements Posc, Flyingc, Hitboxc, Unitc, Mechc, Elevati
 
     @Override
     public void update(){
-        float len = vel().len();
-        baseRotation = Angles.moveToward(baseRotation, vel().angle(), type().baseRotateSpeed * Mathf.clamp(len / type().speed));
+        float len = deltaLen();
+        baseRotation = Angles.moveToward(baseRotation, deltaAngle(), type().baseRotateSpeed * Mathf.clamp(len / type().speed));
         walkTime += Time.delta()*len;
     }
 }