Implemented the Experience Drain focus.

MODSRC/vazkii/tinkerer/common/core/helper/ExperienceHelper.java

@@ -0,0 +1,43 @@
+package vazkii.tinkerer.common.core.helper;
+
+import net.minecraft.entity.player.EntityPlayer;
+
+// From OpenBlocksLib: https://github.com/OpenMods/OpenModsLib
+public class ExperienceHelper {
+
+    public static int getPlayerXP(EntityPlayer player) {
+        return (int)(getExperienceForLevel(player.experienceLevel) + (player.experience * player.xpBarCap()));
+}
+	
+	public static void drainPlayerXP(EntityPlayer player, int amount) {
+		addPlayerXP(player, -amount);
+	}
+
+	public static void addPlayerXP(EntityPlayer player, int amount) {
+		int experience = getPlayerXP(player) + amount;
+		player.experienceTotal = experience;
+		player.experienceLevel = getLevelForExperience(experience);
+		int expForLevel = getExperienceForLevel(player.experienceLevel);
+		player.experience = (float)(experience - expForLevel) / (float)player.xpBarCap();
+	}
+	
+	public static int getExperienceForLevel(int level) {
+		if (level == 0) { return 0; }
+		if (level > 0 && level < 16) {
+			return level * 17;
+		} else if (level > 15 && level < 31) {
+			return (int)(1.5 * Math.pow(level, 2) - 29.5 * level + 360);
+		} else {
+			return (int)(3.5 * Math.pow(level, 2) - 151.5 * level + 2220);
+		}
+	}
+
+	public static int getLevelForExperience(int experience) {
+		int i = 0;
+		while (getExperienceForLevel(i) <= experience) {
+			i++;
+		}
+		return i - 1;
+	}
+	
+}

MODSRC/vazkii/tinkerer/common/item/foci/ItemModFocus.java

@@ -70,7 +70,7 @@ public abstract class ItemModFocus extends ItemMod implements IWandFocus {
 	@Override
 	public void addInformation(ItemStack stack, EntityPlayer player, List list, boolean par4) {
 		AspectList cost = getVisCost();
-		if(cost != null && cost.size() > 0) {
+		if(cost != null) {
 			list.add(StatCollector.translateToLocal(isVisCostPerTick() ? "item.Focus.cost2" : "item.Focus.cost1"));
 			addVisCostTooltip(cost, stack, player, list, par4);
 		}

MODSRC/vazkii/tinkerer/common/item/kami/foci/ItemFocusXPDrain.java

@@ -1,25 +1,71 @@
 package vazkii.tinkerer.common.item.kami.foci;
 
 import java.awt.Color;
+import java.util.ArrayList;
 import java.util.List;
 
+import net.minecraft.enchantment.EnchantmentHelper;
 import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.EnumRarity;
 import net.minecraft.item.ItemStack;
+import net.minecraft.util.EnumChatFormatting;
 import net.minecraft.util.StatCollector;
+import thaumcraft.api.aspects.Aspect;
 import thaumcraft.api.aspects.AspectList;
 import thaumcraft.common.config.Config;
+import thaumcraft.common.items.wands.ItemWandCasting;
 import vazkii.tinkerer.client.core.helper.ClientHelper;
+import vazkii.tinkerer.client.core.proxy.TTClientProxy;
+import vazkii.tinkerer.common.core.helper.ExperienceHelper;
 import vazkii.tinkerer.common.item.foci.ItemModFocus;
 
 public class ItemFocusXPDrain extends ItemModFocus {
 
 	AspectList cost = new AspectList();
-	final int xpUse = 10;
+	private int lastGiven = 0;
 	
 	public ItemFocusXPDrain(int par1) {
 		super(par1);
 	}
 	
+	@Override
+	public boolean isVisCostPerTick() {
+		return true;
+	}
+	
+	@Override
+	public void onUsingFocusTick(ItemStack paramItemStack, EntityPlayer paramEntityPlayer, int paramInt) {
+		if(paramEntityPlayer.worldObj.isRemote)
+			return;
+		
+		ItemWandCasting wand = (ItemWandCasting) paramItemStack.getItem();
+		AspectList aspects = wand.getAllVis(paramItemStack);
+		
+		Aspect aspectToAdd = null;
+		int takes = 0;
+		
+		while(aspectToAdd == null) {
+			lastGiven = lastGiven == 5 ? 0 : lastGiven + 1;
+
+			Aspect aspect = Aspect.getPrimalAspects().get(lastGiven);
+			
+			if(aspects.getAmount(aspect) < wand.getMaxVis(paramItemStack))
+				aspectToAdd = aspect;
+			
+			++takes;
+			if(takes == 7)
+				return;
+		}
+		
+		int xpUse = getXpUse(paramItemStack);
+		if(paramEntityPlayer.experienceTotal >= xpUse) {
+			ExperienceHelper.drainPlayerXP(paramEntityPlayer, xpUse);
+			wand.storeVis(paramItemStack, aspectToAdd, wand.getVis(paramItemStack, aspectToAdd) + 500);
+		}
+	}
+	
+
+	
 	@Override
 	public int getColorFromItemStack(ItemStack par1ItemStack, int par2) {
 		return getFocusColor();
@@ -31,9 +77,13 @@ public class ItemFocusXPDrain extends ItemModFocus {
 		return Color.HSBtoRGB((player.ticksExisted * 2 % 360) / 360F, 1F, 1F);
 	}
 	
+	int getXpUse(ItemStack stack) {
+		return 30 - EnchantmentHelper.getEnchantmentLevel(Config.enchFrugal.effectId, stack) * 3;
+	}
+	
 	@Override
 	protected void addVisCostTooltip(AspectList cost, ItemStack stack, EntityPlayer player, List list, boolean par4) {
-		list.add(String.format(StatCollector.translateToLocal("ttmisc.focusXPDrain.tooltip"), xpUse));
+		list.add(" " + EnumChatFormatting.WHITE + String.format(StatCollector.translateToLocal("ttmisc.focusXPDrain.tooltip"), getXpUse(stack)));
 	}
 
 	@Override
@@ -41,6 +91,11 @@ public class ItemFocusXPDrain extends ItemModFocus {
 		return cost;
 	}
 	
+	@Override
+	public EnumRarity getRarity(ItemStack par1ItemStack) {
+		return TTClientProxy.kamiRarity;
+	}
+	
 	@Override
 	public boolean acceptsEnchant(int paramInt) {
 		return paramInt == Config.enchFrugal.effectId;

resources/assets/ttinkerer/lang/en_US.lang

@@ -46,7 +46,7 @@ ttmisc.mode.axe.2=Tree Mode
 ttmisc.mode.sword.0=Single Mode
 ttmisc.mode.sword.1=Area Mode
 ttmisc.mode.sword.2=Soul Mode
-ttmisc.focusXPDrain.tooltip=%s XP per tick
+ttmisc.focusXPDrain.tooltip=Experience x %s
 
 # ITEM NAMES
 item.ttinkerer:darkQuartz.name=Smokey Quartz
@@ -102,6 +102,7 @@ item.ttinkerer:ichorPouch.name=Bottomless Pouch
 item.ttinkerer:blockTalisman.name=Black Hole Talisman
 item.ttinkerer:placementMirror.name=Worldshaper's Looking Glass
 item.ttinkerer:focusShadowbeam.name=Wand Focus: Shadowbeam
+item.ttinkerer:focusXpDrain.name=Wand Focus: Experience Drain
 
 # BLOCK NAMES
 tile.ttinkerer:darkQuartz.name=Block of Smokey Quartz