TraitSlimey.java

package slimeknights.tconstruct.tools.traits;

import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.monster.EntitySlime;
import net.minecraft.item.ItemStack;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.TextFormatting;
import net.minecraft.world.World;

import java.lang.reflect.InvocationTargetException;

import slimeknights.tconstruct.library.Util;
import slimeknights.tconstruct.library.traits.AbstractTrait;

public class TraitSlimey extends AbstractTrait {

  private static float chance = 0.0033f;

  protected final Class<? extends EntitySlime> slime;

  public TraitSlimey(String suffix, Class<? extends EntitySlime> slime) {
    super("slimey_" + suffix, TextFormatting.GREEN);
    this.slime = slime;
  }

  @Override
  public String getLocalizedName() {
    return Util.translate(String.format(LOC_Name, "slimey"));
  }

  @Override
  public String getLocalizedDesc() {
    return Util.translate(String.format(LOC_Desc, "slimey"));
  }

  @Override
  public void afterBlockBreak(ItemStack tool, World world, IBlockState state, BlockPos pos, EntityLivingBase player, boolean wasEffective) {
    if(wasEffective && !world.isRemote && random.nextFloat() < chance) {
      spawnSlime(player, pos.getX() + 0.5, pos.getY(), pos.getZ() + 0.5, world);
    }
  }

  @Override
  public void afterHit(ItemStack tool, EntityLivingBase player, EntityLivingBase target, float damageDealt, boolean wasCritical, boolean wasHit) {
    if(!target.isEntityAlive() && !target.getEntityWorld().isRemote && random.nextFloat() < chance) {
      spawnSlime(player, target.posX, target.posY, target.posZ, target.getEntityWorld());
    }
  }

  protected void spawnSlime(EntityLivingBase player, double x, double y, double z, World world) {
    try {
      EntitySlime entity = slime.getConstructor(World.class).newInstance(world);
      entity.setSlimeSize(1);
      entity.setPosition(x, y, z);
      world.spawnEntity(entity);
      entity.setLastAttacker(player);
      entity.playLivingSound();
    } catch(InstantiationException e) {
      e.printStackTrace();
    } catch(IllegalAccessException e) {
      e.printStackTrace();
    } catch(InvocationTargetException e) {
      e.printStackTrace();
    } catch(NoSuchMethodException e) {
      e.printStackTrace();
    }
  }

}