Drownable legged units

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

@@ -25,6 +25,7 @@ abstract class CrawlComp implements Posc, Rotc, Hitboxc, Unitc{
     @Import Team team;
     @Import Vec2 vel;
 
+    transient Floor lastDeepFloor;
     //TODO segments
     transient float lastCrawlSlowdown = 1f;
     transient float segmentRot, crawlTime;
@@ -55,13 +56,20 @@ abstract class CrawlComp implements Posc, Rotc, Hitboxc, Unitc{
         segmentRot = rotation;
     }
 
+    @Override
+    @Replace
+    public Floor drownFloor(){
+        return lastDeepFloor;
+    }
+
     @Override
     public void update(){
         if(moving()){
             segmentRot = Angles.moveToward(segmentRot, rotation, type.segmentRotSpeed);
 
             int radius = (int)Math.max(0, hitSize / tilesize);
-            int count = 0, solids = 0;
+            int count = 0, solids = 0, deeps = 0;
+            lastDeepFloor = null;
 
             //calculate tiles under this unit, and apply slowdown + particle effects
             for(int cx = -radius; cx <= radius; cx++){
@@ -75,6 +83,11 @@ abstract class CrawlComp implements Posc, Rotc, Hitboxc, Unitc{
                                 solids ++;
                             }
 
+                            if(t.floor().isDeep()){
+                                deeps ++;
+                                lastDeepFloor = t.floor();
+                            }
+
                             if(t.build != null && t.build.team != team){
                                 t.build.damage(team, type.crawlDamage * Time.delta);
                             }
@@ -89,6 +102,11 @@ abstract class CrawlComp implements Posc, Rotc, Hitboxc, Unitc{
                 }
             }
 
+            //when most blocks under this unit cannot be drowned in, do not drown
+            if((float)deeps / count < 0.75f){
+                lastDeepFloor = null;
+            }
+
             lastCrawlSlowdown = Mathf.lerp(1f, type.crawlSlowdown, Mathf.clamp((float)solids / count / type.crawlSlowdownFrac));
         }
         segmentRot = Angles.clampRange(segmentRot, rotation, type.segmentMaxRot);