001 package net.minecraftforge.common; 002 003 import java.util.*; 004 import java.util.Map.Entry; 005 006 import com.google.common.collect.ArrayListMultimap; 007 import com.google.common.collect.ListMultimap; 008 009 import cpw.mods.fml.common.FMLLog; 010 import cpw.mods.fml.common.Loader; 011 012 import net.minecraft.block.Block; 013 import net.minecraft.entity.EntityLiving; 014 import net.minecraft.entity.item.EntityItem; 015 import net.minecraft.entity.player.EntityPlayer; 016 import net.minecraft.item.Item; 017 import net.minecraft.item.ItemArmor; 018 import net.minecraft.item.ItemAxe; 019 import net.minecraft.item.ItemPickaxe; 020 import net.minecraft.item.ItemSpade; 021 import net.minecraft.item.ItemStack; 022 import net.minecraft.util.DamageSource; 023 import net.minecraft.util.EnumMovingObjectType; 024 import net.minecraft.util.MovingObjectPosition; 025 import net.minecraft.util.WeightedRandom; 026 import net.minecraft.util.WeightedRandomItem; 027 import net.minecraft.world.World; 028 import net.minecraftforge.event.ForgeEventFactory; 029 import net.minecraftforge.event.entity.item.ItemTossEvent; 030 import net.minecraftforge.event.entity.living.*; 031 import net.minecraftforge.event.entity.living.LivingEvent.*; 032 033 public class ForgeHooks 034 { 035 static class GrassEntry extends WeightedRandomItem 036 { 037 public final Block block; 038 public final int metadata; 039 public GrassEntry(Block block, int meta, int weight) 040 { 041 super(weight); 042 this.block = block; 043 this.metadata = meta; 044 } 045 } 046 047 static class SeedEntry extends WeightedRandomItem 048 { 049 public final ItemStack seed; 050 public SeedEntry(ItemStack seed, int weight) 051 { 052 super(weight); 053 this.seed = seed; 054 } 055 } 056 static final List<GrassEntry> grassList = new ArrayList<GrassEntry>(); 057 static final List<SeedEntry> seedList = new ArrayList<SeedEntry>(); 058 059 public static void plantGrass(World world, int x, int y, int z) 060 { 061 GrassEntry grass = (GrassEntry)WeightedRandom.getRandomItem(world.rand, grassList); 062 if (grass == null || grass.block == null || !grass.block.canBlockStay(world, x, y, z)) 063 { 064 return; 065 } 066 world.setBlockAndMetadataWithNotify(x, y, z, grass.block.blockID, grass.metadata); 067 } 068 069 public static ItemStack getGrassSeed(World world) 070 { 071 SeedEntry entry = (SeedEntry)WeightedRandom.getRandomItem(world.rand, seedList); 072 if (entry == null || entry.seed == null) 073 { 074 return null; 075 } 076 return entry.seed.copy(); 077 } 078 079 private static boolean toolInit = false; 080 static HashMap<Item, List> toolClasses = new HashMap<Item, List>(); 081 static HashMap<List, Integer> toolHarvestLevels = new HashMap<List, Integer>(); 082 static HashSet<List> toolEffectiveness = new HashSet<List>(); 083 084 public static boolean canHarvestBlock(Block block, EntityPlayer player, int metadata) 085 { 086 if (block.blockMaterial.isToolNotRequired()) 087 { 088 return true; 089 } 090 091 ItemStack stack = player.inventory.getCurrentItem(); 092 if (stack == null) 093 { 094 return player.canHarvestBlock(block); 095 } 096 097 List info = (List)toolClasses.get(stack.getItem()); 098 if (info == null) 099 { 100 return player.canHarvestBlock(block); 101 } 102 103 Object[] tmp = info.toArray(); 104 String toolClass = (String)tmp[0]; 105 int harvestLevel = (Integer)tmp[1]; 106 107 Integer blockHarvestLevel = (Integer)toolHarvestLevels.get(Arrays.asList(block, metadata, toolClass)); 108 if (blockHarvestLevel == null) 109 { 110 return player.canHarvestBlock(block); 111 } 112 113 if (blockHarvestLevel > harvestLevel) 114 { 115 return false; 116 } 117 return true; 118 } 119 120 public static float blockStrength(Block block, EntityPlayer player, World world, int x, int y, int z) 121 { 122 int metadata = world.getBlockMetadata(x, y, z); 123 float hardness = block.getBlockHardness(world, x, y, z); 124 if (hardness < 0.0F) 125 { 126 return 0.0F; 127 } 128 129 if (!canHarvestBlock(block, player, metadata)) 130 { 131 float speed = ForgeEventFactory.getBreakSpeed(player, block, metadata, 1.0f); 132 return (speed < 0 ? 0 : speed) / hardness / 100F; 133 } 134 else 135 { 136 return player.getCurrentPlayerStrVsBlock(block, metadata) / hardness / 30F; 137 } 138 } 139 140 public static boolean isToolEffective(ItemStack stack, Block block, int metadata) 141 { 142 List toolClass = (List)toolClasses.get(stack.getItem()); 143 if (toolClass == null) 144 { 145 return false; 146 } 147 return toolEffectiveness.contains(Arrays.asList(block, metadata, (String)toolClass.get(0))); 148 } 149 150 static void initTools() 151 { 152 if (toolInit) 153 { 154 return; 155 } 156 toolInit = true; 157 158 MinecraftForge.setToolClass(Item.pickaxeWood, "pickaxe", 0); 159 MinecraftForge.setToolClass(Item.pickaxeStone, "pickaxe", 1); 160 MinecraftForge.setToolClass(Item.pickaxeSteel, "pickaxe", 2); 161 MinecraftForge.setToolClass(Item.pickaxeGold, "pickaxe", 0); 162 MinecraftForge.setToolClass(Item.pickaxeDiamond, "pickaxe", 3); 163 164 MinecraftForge.setToolClass(Item.axeWood, "axe", 0); 165 MinecraftForge.setToolClass(Item.axeStone, "axe", 1); 166 MinecraftForge.setToolClass(Item.axeSteel, "axe", 2); 167 MinecraftForge.setToolClass(Item.axeGold, "axe", 0); 168 MinecraftForge.setToolClass(Item.axeDiamond, "axe", 3); 169 170 MinecraftForge.setToolClass(Item.shovelWood, "shovel", 0); 171 MinecraftForge.setToolClass(Item.shovelStone, "shovel", 1); 172 MinecraftForge.setToolClass(Item.shovelSteel, "shovel", 2); 173 MinecraftForge.setToolClass(Item.shovelGold, "shovel", 0); 174 MinecraftForge.setToolClass(Item.shovelDiamond, "shovel", 3); 175 176 for (Block block : ItemPickaxe.blocksEffectiveAgainst) 177 { 178 MinecraftForge.setBlockHarvestLevel(block, "pickaxe", 0); 179 } 180 181 for (Block block : ItemSpade.blocksEffectiveAgainst) 182 { 183 MinecraftForge.setBlockHarvestLevel(block, "shovel", 0); 184 } 185 186 for (Block block : ItemAxe.blocksEffectiveAgainst) 187 { 188 MinecraftForge.setBlockHarvestLevel(block, "axe", 0); 189 } 190 191 MinecraftForge.setBlockHarvestLevel(Block.obsidian, "pickaxe", 3); 192 MinecraftForge.setBlockHarvestLevel(Block.oreEmerald, "pickaxe", 2); 193 MinecraftForge.setBlockHarvestLevel(Block.oreDiamond, "pickaxe", 2); 194 MinecraftForge.setBlockHarvestLevel(Block.blockDiamond, "pickaxe", 2); 195 MinecraftForge.setBlockHarvestLevel(Block.oreGold, "pickaxe", 2); 196 MinecraftForge.setBlockHarvestLevel(Block.blockGold, "pickaxe", 2); 197 MinecraftForge.setBlockHarvestLevel(Block.oreIron, "pickaxe", 1); 198 MinecraftForge.setBlockHarvestLevel(Block.blockSteel, "pickaxe", 1); 199 MinecraftForge.setBlockHarvestLevel(Block.oreLapis, "pickaxe", 1); 200 MinecraftForge.setBlockHarvestLevel(Block.blockLapis, "pickaxe", 1); 201 MinecraftForge.setBlockHarvestLevel(Block.oreRedstone, "pickaxe", 2); 202 MinecraftForge.setBlockHarvestLevel(Block.oreRedstoneGlowing, "pickaxe", 2); 203 MinecraftForge.removeBlockEffectiveness(Block.oreRedstone, "pickaxe"); 204 MinecraftForge.removeBlockEffectiveness(Block.obsidian, "pickaxe"); 205 MinecraftForge.removeBlockEffectiveness(Block.oreRedstoneGlowing, "pickaxe"); 206 } 207 208 public static String getTexture(String _default, Object obj) 209 { 210 if (obj instanceof Item) 211 { 212 return ((Item)obj).getTextureFile(); 213 } 214 else if (obj instanceof Block) 215 { 216 return ((Block)obj).getTextureFile(); 217 } 218 else 219 { 220 return _default; 221 } 222 } 223 224 public static int getTotalArmorValue(EntityPlayer player) 225 { 226 int ret = 0; 227 for (int x = 0; x < player.inventory.armorInventory.length; x++) 228 { 229 ItemStack stack = player.inventory.armorInventory[x]; 230 if (stack != null && stack.getItem() instanceof ISpecialArmor) 231 { 232 ret += ((ISpecialArmor)stack.getItem()).getArmorDisplay(player, stack, x); 233 } 234 else if (stack != null && stack.getItem() instanceof ItemArmor) 235 { 236 ret += ((ItemArmor)stack.getItem()).damageReduceAmount; 237 } 238 } 239 return ret; 240 } 241 242 static 243 { 244 grassList.add(new GrassEntry(Block.plantYellow, 0, 20)); 245 grassList.add(new GrassEntry(Block.plantRed, 0, 10)); 246 seedList.add(new SeedEntry(new ItemStack(Item.seeds), 10)); 247 initTools(); 248 } 249 250 /** 251 * Called when a player uses 'pick block', calls new Entity and Block hooks. 252 */ 253 public static boolean onPickBlock(MovingObjectPosition target, EntityPlayer player, World world) 254 { 255 ItemStack result = null; 256 boolean isCreative = player.capabilities.isCreativeMode; 257 258 if (target.typeOfHit == EnumMovingObjectType.TILE) 259 { 260 int x = target.blockX; 261 int y = target.blockY; 262 int z = target.blockZ; 263 Block var8 = Block.blocksList[world.getBlockId(x, y, z)]; 264 265 if (var8 == null) 266 { 267 return false; 268 } 269 270 result = var8.getPickBlock(target, world, x, y, z); 271 } 272 else 273 { 274 if (target.typeOfHit != EnumMovingObjectType.ENTITY || target.entityHit == null || !isCreative) 275 { 276 return false; 277 } 278 279 result = target.entityHit.getPickedResult(target); 280 } 281 282 if (result == null) 283 { 284 return false; 285 } 286 287 for (int x = 0; x < 9; x++) 288 { 289 ItemStack stack = player.inventory.getStackInSlot(x); 290 if (stack != null && stack.isItemEqual(result) && ItemStack.areItemStackTagsEqual(stack, result)) 291 { 292 player.inventory.currentItem = x; 293 return true; 294 } 295 } 296 297 if (!isCreative) 298 { 299 return false; 300 } 301 302 int slot = player.inventory.getFirstEmptyStack(); 303 if (slot < 0 || slot >= 9) 304 { 305 slot = player.inventory.currentItem; 306 } 307 308 player.inventory.setInventorySlotContents(slot, result); 309 player.inventory.currentItem = slot; 310 return true; 311 } 312 313 //Optifine Helper Functions u.u, these are here specifically for Optifine 314 //Note: When using Optfine, these methods are invoked using reflection, which 315 //incurs a major performance penalty. 316 public static void onLivingSetAttackTarget(EntityLiving entity, EntityLiving target) 317 { 318 MinecraftForge.EVENT_BUS.post(new LivingSetAttackTargetEvent(entity, target)); 319 } 320 321 public static boolean onLivingUpdate(EntityLiving entity) 322 { 323 return MinecraftForge.EVENT_BUS.post(new LivingUpdateEvent(entity)); 324 } 325 326 public static boolean onLivingAttack(EntityLiving entity, DamageSource src, int amount) 327 { 328 return MinecraftForge.EVENT_BUS.post(new LivingAttackEvent(entity, src, amount)); 329 } 330 331 public static int onLivingHurt(EntityLiving entity, DamageSource src, int amount) 332 { 333 LivingHurtEvent event = new LivingHurtEvent(entity, src, amount); 334 return (MinecraftForge.EVENT_BUS.post(event) ? 0 : event.ammount); 335 } 336 337 public static boolean onLivingDeath(EntityLiving entity, DamageSource src) 338 { 339 return MinecraftForge.EVENT_BUS.post(new LivingDeathEvent(entity, src)); 340 } 341 342 public static boolean onLivingDrops(EntityLiving entity, DamageSource source, ArrayList<EntityItem> drops, int lootingLevel, boolean recentlyHit, int specialDropValue) 343 { 344 return MinecraftForge.EVENT_BUS.post(new LivingDropsEvent(entity, source, drops, lootingLevel, recentlyHit, specialDropValue)); 345 } 346 347 public static float onLivingFall(EntityLiving entity, float distance) 348 { 349 LivingFallEvent event = new LivingFallEvent(entity, distance); 350 return (MinecraftForge.EVENT_BUS.post(event) ? 0.0f : event.distance); 351 } 352 353 public static boolean isLivingOnLadder(Block block, World world, int x, int y, int z) 354 { 355 return block != null && block.isLadder(world, x, y, z); 356 } 357 358 public static void onLivingJump(EntityLiving entity) 359 { 360 MinecraftForge.EVENT_BUS.post(new LivingJumpEvent(entity)); 361 } 362 363 public static EntityItem onPlayerTossEvent(EntityPlayer player, ItemStack item) 364 { 365 player.captureDrops = true; 366 EntityItem ret = player.dropPlayerItemWithRandomChoice(item, false); 367 player.capturedDrops.clear(); 368 player.captureDrops = false; 369 370 ItemTossEvent event = new ItemTossEvent(ret, player); 371 if (MinecraftForge.EVENT_BUS.post(event)) 372 { 373 return null; 374 } 375 376 player.joinEntityItemWithWorld(event.entityItem); 377 return event.entityItem; 378 } 379 }