Added allowRectanglePlacement for 1x1 blocks

core/src/mindustry/input/InputHandler.java

@@ -1973,11 +1973,13 @@ public abstract class InputHandler implements InputProcessor, GestureListener{
         var end = world.build(endX, endY);
         if(diagonal && (block == null || block.allowDiagonal)){
             if(block != null && start instanceof ChainedBuilding && end instanceof ChainedBuilding
-                    && block.canReplace(end.block) && block.canReplace(start.block)){
+            && block.canReplace(end.block) && block.canReplace(start.block)){
                 points = Placement.upgradeLine(startX, startY, endX, endY);
             }else{
                 points = Placement.pathfindLine(block != null && block.conveyorPlacement, startX, startY, endX, endY);
             }
+        }else if(block != null && block.size == 1 && block.allowRectanglePlacement){
+            points = Placement.normalizeRectangle(startX, startY, endX, endY, block.size);
         }else{
             points = Placement.normalizeLine(startX, startY, endX, endY);
         }

core/src/mindustry/input/Placement.java

@@ -58,6 +58,22 @@ public class Placement{
         return points;
     }
 
+    /** Normalize two points into a rectangle. */
+    public static Seq<Point2> normalizeRectangle(int startX, int startY, int endX, int endY, int blockSize){
+        Pools.freeAll(points);
+        points.clear();
+
+        int minX = Math.min(startX, endX), minY = Math.min(startY, endY), maxX = Math.max(startX, endX), maxY = Math.max(startY, endY);
+
+        for(int y = minY; y <= maxY; y += blockSize){
+            for(int x = minX; x <= maxX; x += blockSize){
+                points.add(Pools.obtain(Point2.class, Point2::new).set(x, y));
+            }
+        }
+
+        return points;
+    }
+
     public static Seq<Point2> upgradeLine(int startX, int startY, int endX, int endY){
         closed.clear();
         Pools.freeAll(points);

core/src/mindustry/world/Block.java

@@ -245,6 +245,8 @@ public class Block extends UnlockableContent implements Senseable{
     public boolean allowDiagonal = true;
     /** Whether to swap the diagonal placement modes. */
     public boolean swapDiagonalPlacement;
+    /** Whether to allow rectangular placement, as opposed to a line. Only supported for 1x1 blocks currently! */
+    public boolean allowRectanglePlacement = false;
     /** Build queue priority in schematics. */
     public int schematicPriority = 0;
     /**
@@ -322,6 +324,8 @@ public class Block extends UnlockableContent implements Senseable{
     public float deconstructThreshold = 0f;
     /** If true, this block deconstructs immediately. Instant deconstruction implies no resource refund. */
     public boolean instantDeconstruct = false;
+    /** If true, this block constructs immediately. This implies no resource requirement, and ignores configs - do not use, this is for performance only! */
+    public boolean instantBuild = false;
     /** Effect for placing the block. Passes size as rotation. */
     public Effect placeEffect = Fx.placeBlock;
     /** Effect for breaking the block. Passes size as rotation. */

core/src/mindustry/world/Build.java

@@ -122,6 +122,14 @@ public class Build{
             }
         });
 
+        //complete it immediately
+        if(result.instantBuild){
+            Events.fire(new BlockBuildBeginEvent(tile, team, unit, false));
+            result.placeBegan(tile, tile.block, unit);
+            ConstructBlock.constructFinish(tile, result, unit, (byte)rotation, team, null);
+            return;
+        }
+
         Block previous = tile.block();
         Block sub = ConstructBlock.get(result.size);
         var prevBuild = new Seq<Building>(9);

core/src/mindustry/world/blocks/ConstructBlock.java

@@ -83,7 +83,7 @@ public class ConstructBlock extends Block{
             tile.setBlock(block, team, rotation);
         }
 
-        if(tile.build != null){
+        if(tile.build != null && tile.build.block == block){
             tile.build.health = block.health * healthf;
 
             if(config != null){
@@ -100,11 +100,11 @@ public class ConstructBlock extends Block{
 
             //make sure block indexer knows it's damaged
             indexer.notifyHealthChanged(tile.build);
-        }
 
-        //last builder was this local client player, call placed()
-        if(tile.build != null && !headless && builder == player.unit()){
-            tile.build.playerPlaced(config);
+            //last builder was this local client player, call placed()
+            if(!headless && builder == player.unit()){
+                tile.build.playerPlaced(config);
+            }
         }
 
         if(fogControl.isVisibleTile(team, tile.x, tile.y)){

core/src/mindustry/world/blocks/environment/Floor.java

@@ -90,6 +90,8 @@ public class Floor extends Block{
         super(name);
         this.variants = variants;
         placeableLiquid = true;
+        allowRectanglePlacement = true;
+        instantBuild = true;
     }
 
     @Override

core/src/mindustry/world/blocks/environment/StaticWall.java

@@ -20,6 +20,8 @@ public class StaticWall extends Prop{
         solid = true;
         variants = 2;
         cacheLayer = CacheLayer.walls;
+        allowRectanglePlacement = true;
+        instantBuild = true;
     }
 
     @Override