WIP schematic part idea

core/src/mindustry/content/Blocks.java

@@ -79,6 +79,8 @@ public class Blocks{
     //sandbox
     powerSource, powerVoid, itemSource, itemVoid, liquidSource, liquidVoid, payloadSource, payloadVoid, illuminator, heatSource,
 
+    partInput, partOutput,
+
     //defense
     copperWall, copperWallLarge, titaniumWall, titaniumWallLarge, plastaniumWall, plastaniumWallLarge, thoriumWall, thoriumWallLarge, door, doorLarge,
     phaseWall, phaseWallLarge, surgeWall, surgeWallLarge,
@@ -5742,6 +5744,14 @@ public class Blocks{
             ambientSound = Sounds.none;
         }};
 
+        partInput = new PartMarker("part-input"){{
+            requirements(Category.crafting, BuildVisibility.debugOnly, with());
+        }};
+
+        partOutput = new PartMarker("part-output"){{
+            requirements(Category.crafting, BuildVisibility.debugOnly, with());
+        }};
+
         //TODO move
         illuminator = new LightBlock("illuminator"){{
             requirements(Category.effect, BuildVisibility.lightingOnly, with(Items.graphite, 12, Items.silicon, 8, Items.lead, 8));

core/src/mindustry/world/blocks/logic/PartMarker.java

@@ -0,0 +1,65 @@
+package mindustry.world.blocks.logic;
+
+import arc.graphics.g2d.*;
+import arc.util.*;
+import arc.util.io.*;
+import mindustry.annotations.Annotations.*;
+import mindustry.ctype.*;
+import mindustry.gen.*;
+import mindustry.io.*;
+import mindustry.type.*;
+import mindustry.world.*;
+import mindustry.world.meta.*;
+
+/** For internal use only; marks base part edges. */
+public class PartMarker extends Block{
+    public @Load("@-arrow") TextureRegion arrowRegion;
+
+    public PartMarker(String name){
+        super(name);
+
+        update = true;
+        rotate = true;
+        configurable = true;
+        saveConfig = true;
+        group = BlockGroup.transportation;
+
+        config(Item.class, (PartMarkerBuild tile, Item item) -> tile.content = item);
+        config(Liquid.class, (PartMarkerBuild tile, Liquid item) -> tile.content = item);
+        configClear((PartMarkerBuild tile) -> tile.content = null);
+    }
+
+    public class PartMarkerBuild extends Building{
+        public @Nullable UnlockableContent content;
+
+        @Override
+        public void draw(){
+            super.draw();
+            Draw.rect(arrowRegion, x, y);
+
+            if(content != null){
+                float size = 4f;
+                Draw.rect(content.fullIcon, x, y, size, size);
+            }
+        }
+
+        @Override
+        public UnlockableContent config(){
+            return content;
+        }
+
+        @Override
+        public void write(Writes write){
+            super.write(write);
+
+            TypeIO.writeContent(write, content);
+        }
+
+        @Override
+        public void read(Reads read, byte revision){
+            super.read(read, revision);
+
+            content = TypeIO.readContent(read) instanceof UnlockableContent con ? con : null;
+        }
+    }
+}