🔩 Add (plastanium) diode (#964)

* Add plastanium diode

* Only rotate the arrow part

* Use the sum of graph batteries from both sides

* Make diode send power overflow

Diode keeps one-way equalizing while the sending graph has batteries that are ¬ yet fully filled.

* Remove redundant block != null check

* Remove free power

* Stash

* Revert "Stash"

This reverts commit 0c14854519.

* Equalize graph storage percentage

* Update sprite

* Move nearby link check

* DRY

* Fire deathstar at extra spaces

* 〃

* Fix ghost rotation

* Please overlord anuke

* Mild cleanup

* Konami code

* 〃

* Lowercase float

* Newline begone

* Fix overclocking issue

* Fix rotation and name

core/assets/bundles/bundle.properties

@@ -560,6 +560,8 @@ bar.heat = Heat
 bar.power = Power
 bar.progress = Build Progress
 bar.spawned = Units: {0}/{1}
+bar.input = Input
+bar.output = Output
 
 bullet.damage = [stat]{0}[lightgray] damage
 bullet.splashdamage = [stat]{0}[lightgray] area dmg ~[stat] {1}[lightgray] tiles
@@ -902,6 +904,7 @@ block.coal-centrifuge.name = Coal Centrifuge
 block.power-node.name = Power Node
 block.power-node-large.name = Large Power Node
 block.surge-tower.name = Surge Tower
+block.diode.name = Battery Diode
 block.battery.name = Battery
 block.battery-large.name = Large Battery
 block.combustion-generator.name = Combustion Generator
@@ -1130,6 +1133,7 @@ block.phase-conduit.description = Advanced liquid transport block. Uses power to
 block.power-node.description = Transmits power to connected nodes. The node will receive power from or supply power to any adjacent blocks.
 block.power-node-large.description = An advanced power node with greater range.
 block.surge-tower.description = An extremely long-range power node with fewer available connections.
+block.diode.description = Battery power can flow through this block in only one direction, but only if the other side has less power stored.
 block.battery.description = Stores power as a buffer in times of surplus energy. Outputs power in times of deficit.
 block.battery-large.description = Stores much more power than a regular battery.
 block.combustion-generator.description = Generates power by burning flammable materials, such as coal.

core/src/io/anuke/mindustry/content/Blocks.java

@@ -63,7 +63,7 @@ public class Blocks implements ContentList{
 
     //power
     combustionGenerator, thermalGenerator, turbineGenerator, differentialGenerator, rtgGenerator, solarPanel, largeSolarPanel, thoriumReactor,
-    impactReactor, battery, batteryLarge, powerNode, powerNodeLarge, surgeTower,
+    impactReactor, battery, batteryLarge, powerNode, powerNodeLarge, surgeTower, diode,
 
     //production
     mechanicalDrill, pneumaticDrill, laserDrill, blastDrill, waterExtractor, oilExtractor, cultivator,
@@ -1065,6 +1065,10 @@ public class Blocks implements ContentList{
             laserRange = 30f;
         }};
 
+        diode = new PowerDiode("diode"){{
+            requirements(Category.power, ItemStack.with(Items.silicon, 10, Items.phasefabric, 5, Items.plastanium, 2, Items.metaglass, 1));
+        }};
+
         battery = new Battery("battery"){{
             requirements(Category.power, ItemStack.with(Items.copper, 4, Items.lead, 20));
             consumes.powerBuffered(4000f);

core/src/io/anuke/mindustry/world/Tile.java

@@ -318,6 +318,31 @@ public class Tile implements Position, TargetTrait{
         return null;
     }
 
+    public Tile getNearbyLink(int rotation){
+        if(rotation == 0) return world.ltile(x + 1, y);
+        if(rotation == 1) return world.ltile(x, y + 1);
+        if(rotation == 2) return world.ltile(x - 1, y);
+        if(rotation == 3) return world.ltile(x, y - 1);
+        return null;
+    }
+
+    // ▲ ▲ ▼ ▼ ◀ ▶ ◀ ▶ B A
+    public Tile front(){
+        return getNearbyLink((rotation + 4) % 4);
+    }
+
+    public Tile right(){
+        return getNearbyLink((rotation + 3) % 4);
+    }
+
+    public Tile back(){
+        return getNearbyLink((rotation + 2) % 4);
+    }
+
+    public Tile left(){
+        return getNearbyLink((rotation + 1) % 4);
+    }
+
     public boolean interactable(Team team){
         return getTeam() == Team.derelict || team == getTeam();
     }

core/src/io/anuke/mindustry/world/blocks/power/PowerDiode.java

@@ -0,0 +1,89 @@
+package io.anuke.mindustry.world.blocks.power;
+
+import io.anuke.arc.Core;
+import io.anuke.arc.math.Mathf;
+import io.anuke.mindustry.ui.Bar;
+import io.anuke.arc.util.Eachable;
+import io.anuke.mindustry.ui.Cicon;
+import io.anuke.mindustry.world.Tile;
+import io.anuke.mindustry.world.Block;
+import io.anuke.arc.graphics.g2d.Draw;
+import io.anuke.mindustry.graphics.Pal;
+import io.anuke.arc.graphics.g2d.TextureRegion;
+import io.anuke.mindustry.entities.traits.BuilderTrait;
+
+public class PowerDiode extends Block{
+    protected TextureRegion arrow;
+
+    public PowerDiode(String name){
+        super(name);
+        rotate = true;
+        update = true;
+        solid = true;
+        insulated = true;
+    }
+
+    @Override
+    public void update(Tile tile){
+        super.update(tile);
+
+        if(!tile.back().block().hasPower || !tile.front().block().hasPower) return;
+
+        PowerGraph backGraph = tile.back().entity.power.graph;
+        PowerGraph frontGraph = tile.front().entity.power.graph;
+        if(backGraph == frontGraph) return;
+
+        // 0f - 1f of battery capacity in use
+        float backStored = backGraph.getBatteryStored() / backGraph.getTotalBatteryCapacity();
+        float frontStored = frontGraph.getBatteryStored() / frontGraph.getTotalBatteryCapacity();
+
+        // try to send if the back side has more % capacity stored than the front side
+        if(backStored > frontStored) {
+            // send half of the difference
+            float amount = backGraph.getBatteryStored() * (backStored - frontStored) / 2;
+            // prevent sending more than the front can handle
+            amount = Mathf.clamp(amount, 0, frontGraph.getTotalBatteryCapacity() * (1 - frontStored));
+
+            backGraph.useBatteries(amount);
+            frontGraph.chargeBatteries(amount);
+        }
+    }
+
+    // battery % of the graph on either side, defaults to zero
+    protected float bar(Tile tile){
+        return tile.block().hasPower ? tile.entity.power.graph.getBatteryStored() / tile.entity.power.graph.getTotalBatteryCapacity() : 0f;
+    }
+
+    @Override
+    public void setBars(){
+        super.setBars();
+
+        bars.add("back", entity -> new Bar("bar.input", Pal.lighterOrange, () -> bar(entity.tile.back())) );
+        bars.add("front", entity -> new Bar("bar.output", Pal.lighterOrange, () -> bar(entity.tile.front())) );
+    }
+
+    @Override
+    public void load(){
+        super.load();
+        arrow = Core.atlas.find(name + "-arrow");
+    }
+
+    @Override
+    public void draw(Tile tile){
+        Draw.rect(region, tile.drawx(), tile.drawy(), 0);
+        Draw.rect(arrow, tile.drawx(), tile.drawy(), rotate ? tile.rotation() * 90 : 0);
+    }
+
+    @Override
+    public void drawRequestRegion(BuilderTrait.BuildRequest req, Eachable<BuilderTrait.BuildRequest> list) {
+        TextureRegion reg = icon(Cicon.full);
+        Draw.rect(icon(Cicon.full), req.drawx(), req.drawy(),
+                reg.getWidth() * req.animScale * Draw.scl,
+                reg.getHeight() * req.animScale * Draw.scl,
+                0);
+        Draw.rect(arrow, req.drawx(), req.drawy(),
+                arrow.getWidth() * req.animScale * Draw.scl,
+                arrow.getHeight() * req.animScale * Draw.scl,
+                !rotate ? 0 : req.rotation * 90);
+    }
+}