Sync/save @tick/@time; make @time be based off of @tick

Closes Anuken/Mindustry-Suggestions/issues/2976

core/src/mindustry/core/GameState.java

@@ -16,6 +16,8 @@ public class GameState{
     public int wave = 1;
     /** Wave countdown in ticks. */
     public float wavetime;
+    /** Logic tick. */
+    public double tick;
     /** Whether the game is in game over state. */
     public boolean gameOver = false, serverPaused = false;
     /** Server ticks/second. Only valid in multiplayer. */

core/src/mindustry/core/Logic.java

@@ -370,6 +370,9 @@ public class Logic implements ApplicationListener{
             }
 
             if(!state.isPaused()){
+                float delta = Core.graphics.getDeltaTime();
+                state.tick += Float.isNaN(delta) || Float.isInfinite(delta) ? 0f : delta * 60f;
+
                 state.teams.updateTeamStats();
 
                 if(state.isCampaign()){

core/src/mindustry/io/SaveVersion.java

@@ -92,6 +92,7 @@ public abstract class SaveVersion extends SaveFileReader{
             "build", Version.build,
             "mapname", state.map.name(),
             "wave", state.wave,
+            "tick", state.tick,
             "wavetime", state.wavetime,
             "stats", JsonIO.write(state.stats),
             "rules", JsonIO.write(state.rules),
@@ -110,6 +111,7 @@ public abstract class SaveVersion extends SaveFileReader{
 
         state.wave = map.getInt("wave");
         state.wavetime = map.getFloat("wavetime", state.rules.waveSpacing);
+        state.tick = map.getFloat("tick");
         state.stats = JsonIO.read(GameStats.class, map.get("stats", "{}"));
         state.rules = JsonIO.read(Rules.class, map.get("rules", "{}"));
         if(state.rules.spawns.isEmpty()) state.rules.spawns = waves.get();

core/src/mindustry/logic/LExecutor.java

@@ -57,9 +57,10 @@ public class LExecutor{
 
     /** Runs a single instruction. */
     public void runOnce(){
-        //set time
+        //set up time; note that @time is now only updated once every invocation and directly based off of @tick.
-        vars[varTime].numval = Time.millis();
+        //having time be based off of user system time was a very bad idea.
-        vars[varTick].numval = Time.time;
+        vars[varTime].numval = state.tick / 60.0 * 1000.0;
+        vars[varTick].numval = state.tick;
 
         //reset to start
         if(vars[varCounter].numval >= instructions.length || vars[varCounter].numval < 0){

core/src/mindustry/net/NetworkIO.java

@@ -40,6 +40,7 @@ public class NetworkIO{
 
             stream.writeInt(state.wave);
             stream.writeFloat(state.wavetime);
+            stream.writeDouble(state.tick);
 
             stream.writeInt(player.id);
             player.write(Writes.get(stream));
@@ -61,6 +62,7 @@ public class NetworkIO{
 
             state.wave = stream.readInt();
             state.wavetime = stream.readFloat();
+            state.tick = stream.readDouble();
 
             Groups.clear();
             int id = stream.readInt();