added buffered power consumer

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

@@ -43,14 +43,6 @@ public abstract class BaseBlock extends MappableContent{
         return 0f;
     }
 
-    public float getPowerConsumption(Tile tile){
-        return 0f;
-    }
-
-    public float usePower(Tile tile){
-        return 0f;
-    }
-
     /**Returns the amount of items this block can accept.*/
     public int acceptStack(Item item, int amount, Tile tile, Unit source){
         if(acceptItem(item, tile, tile) && hasItems && (source == null || source.getTeam() == tile.getTeam())){

core/src/io/anuke/mindustry/world/consumers/ConsumePowerBuffered.java

@@ -0,0 +1,21 @@
+package io.anuke.mindustry.world.consumers;
+
+import io.anuke.mindustry.entities.TileEntity;
+import io.anuke.mindustry.world.Block;
+import io.anuke.mindustry.world.consumers.ConsumePower;
+
+public class ConsumePowerBuffered extends ConsumePower{
+    @Override
+    public float getUse(Block block, TileEntity entity){
+        return use * (1 - entity.power.satisfaction);
+    }
+
+    @Override
+    public void addPower(float amount){
+        entity.power.satisfaction = Math.min(entity.power.satisfaction + (amount / use), 1);
+    }
+
+    public void usePower(float amount){
+        entity.power.satisfaction = Math.max(entity.power.satisfaction - (amount / use), 0);
+    }
+}