Canvas block blending

core/src/mindustry/mod/Mod.java

@@ -5,6 +5,7 @@ import arc.util.*;
 import mindustry.*;
 
 public abstract class Mod{
+
     /** @return the config file for this plugin, as the file 'mods/[plugin-name]/config.json'.*/
     public Fi getConfig(){
         return Vars.mods.getConfig(this);

core/src/mindustry/type/Planet.java

@@ -234,7 +234,7 @@ public class Planet extends UnlockableContent{
         return (orbitOffset + universe.secondsf() / (orbitTime / 360f)) % 360f;
     }
 
-    /** Calulates rotation on own axis based on universe time.*/
+    /** Calculates rotation on own axis based on universe time.*/
     public float getRotation(){
         //tidally locked planets always face toward parents
         if(tidalLock){

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

@@ -13,6 +13,7 @@ import arc.scene.ui.layout.*;
 import arc.struct.*;
 import arc.util.*;
 import arc.util.io.*;
+import mindustry.annotations.Annotations.*;
 import mindustry.gen.*;
 import mindustry.ui.*;
 import mindustry.world.*;
@@ -26,6 +27,12 @@ public class CanvasBlock extends Block{
     public int bitsPerPixel;
     public IntIntMap colorToIndex = new IntIntMap();
 
+    public @Load("@-side1") TextureRegion side1;
+    public @Load("@-side2") TextureRegion side2;
+
+    public @Load("@-corner1") TextureRegion corner1;
+    public @Load("@-corner2") TextureRegion corner2;
+
     public CanvasBlock(String name){
         super(name);
 
@@ -55,6 +62,7 @@ public class CanvasBlock extends Block{
     public class CanvasBuild extends Building{
         public @Nullable Texture texture;
         public byte[] data = new byte[Mathf.ceil(canvasSize * canvasSize * bitsPerPixel / 8f)];
+        public int blending;
 
         public void updateTexture(){
             if(headless) return;
@@ -113,15 +121,48 @@ public class CanvasBlock extends Block{
             }
         }
 
+        @Override
+        public void onProximityUpdate(){
+            super.onProximityUpdate();
+
+            blending = 0;
+            for(int i = 0; i < 4; i++){
+                if(blends(world.tile(tile.x + Geometry.d4[i].x * size, tile.y + Geometry.d4[i].y * size))) blending |= (1 << i);
+            }
+        }
+
+        boolean blends(Tile other){
+            return other != null && other.build != null && other.build.block == block && other.build.tileX() == other.x && other.build.tileY() == other.y;
+        }
+
         @Override
         public void draw(){
-            super.draw();
+            if(blending == 0){
+                super.draw();
+            }
 
             if(texture == null){
                 updateTexture();
             }
             Tmp.tr1.set(texture);
-            Draw.rect(Tmp.tr1, x, y, size * tilesize - padding, size * tilesize - padding);
+            float pad = blending == 0 ? padding : 0f;
+
+            Draw.rect(Tmp.tr1, x, y, size * tilesize - pad, size * tilesize - pad);
+            for(int i = 0; i < 4; i ++){
+                if((blending & (1 << i)) == 0){
+                    Draw.rect(i >= 2 ? side2 : side1, x, y, i * 90);
+
+                    if((blending & (1 << ((i + 1) % 4))) != 0){
+                        Draw.rect(i >= 2 ? corner2 : corner1, x, y, i * 90);
+                    }
+
+                    if((blending & (1 << (Mathf.mod(i - 1, 4)))) != 0){
+                        Draw.yscl = -1f;
+                        Draw.rect(i >= 2 ? corner2 : corner1, x, y, i * 90);
+                        Draw.yscl = 1f;
+                    }
+                }
+            }
         }
 
         @Override
@@ -143,9 +184,7 @@ public class CanvasBlock extends Block{
                 int[] curColor = {palette[0]};
                 boolean[] modified = {false};
 
-                dialog.resized(() -> {
-                    dialog.hide();
-                });
+                dialog.resized(dialog::hide);
 
                 dialog.cont.table(Tex.pane, body -> {
                     body.stack(new Element(){