Minor campaign tweaks

core/src/mindustry/ai/BaseAI.java

@@ -36,7 +36,7 @@ public class BaseAI{
     private static int correct = 0, incorrect = 0;
 
     private int lastX, lastY, lastW, lastH;
-    private boolean triedWalls;
+    private boolean triedWalls, foundPath;
 
     TeamData data;
     Interval timer = new Interval(4);
@@ -125,6 +125,7 @@ public class BaseAI{
                         calcPath.clear();
                         calcTile = null;
                         totalCalcs ++;
+                        foundPath = true;
 
                         break;
                     }
@@ -135,7 +136,7 @@ public class BaseAI{
         }
 
         //only schedule when there's something to build.
-        if(totalCalcs > 0 && data.blocks.isEmpty() && timer.get(timerStep, Mathf.lerp(20f, 4f, data.team.rules().aiTier))){
+        if(foundPath && data.blocks.isEmpty() && timer.get(timerStep, Mathf.lerp(20f, 4f, data.team.rules().aiTier))){
             if(!triedWalls){
                 tryWalls();
                 triedWalls = true;

core/src/mindustry/content/TechTree.java

@@ -462,10 +462,11 @@ public class TechTree implements ContentList{
                                     new Research(conduit),
                                     new Research(wave)
                                 ), () -> {
-                                    //TODO change positions?
                                     node(impact0078, Seq.with(
                                         new SectorComplete(tarFields),
                                         new Research(Items.thorium),
+                                        new Research(lancer),
+                                        new Research(salvo),
                                         new Research(coreFoundation)
                                     ), () -> {
                                         node(desolateRift, Seq.with(

core/src/mindustry/game/Universe.java

@@ -84,7 +84,7 @@ public class Universe{
         if(state.hasSector()){
             //update sector light
             float light = state.getSector().getLight();
-            float alpha = Mathf.clamp(Mathf.map(light, 0f, 0.8f, 0.2f, 1f));
+            float alpha = Mathf.clamp(Mathf.map(light, 0f, 0.8f, 0.3f, 1f));
 
             //assign and map so darkness is not 100% dark
             state.rules.ambientLight.a = 1f - alpha;