content: package net.minecraft.entity.ai;
  
  import net.minecraft.block.Block;
  import net.minecraft.block.BlockSlab;
  import net.minecraft.block.BlockStairs;
  import net.minecraft.block.material.Material;
  import net.minecraft.entity.EntityCreature;
  import net.minecraft.entity.EntityLiving;
  import net.minecraft.entity.player.EntityPlayer;
  import net.minecraft.init.Items;
  import net.minecraft.item.ItemStack;
  import net.minecraft.util.BlockPos;
  import net.minecraft.util.MathHelper;
  import net.minecraft.world.pathfinder.WalkNodeProcessor;
  
  public class EntityAIControlledByPlayer extends EntityAIBase {
      private final EntityLiving thisEntity;
      private final float maxSpeed;
      private float currentSpeed;
      private boolean speedBoosted;
      private int speedBoostTime;
      private int maxSpeedBoostTime;
  
      public EntityAIControlledByPlayer(EntityLiving entitylivingIn, float maxspeed) {
          this.thisEntity = entitylivingIn;
          this.maxSpeed = maxspeed;
          this.setMutexBits(7);
      }
  
      public void startExecuting() {
          this.currentSpeed = 0.0F;
      }
  
      public void resetTask() {
          this.speedBoosted = false;
          this.currentSpeed = 0.0F;
      }
  
      public boolean shouldExecute() {
          return this.thisEntity.isEntityAlive() && this.thisEntity.riddenByEntity != null && this.thisEntity.riddenByEntity instanceof EntityPlayer && (this.speedBoosted || this.thisEntity.canBeSteered());
      }
  
      public void updateTask() {
          EntityPlayer entityplayer = (EntityPlayer) this.thisEntity.riddenByEntity;
          EntityCreature entitycreature = (EntityCreature) this.thisEntity;
          float f = MathHelper.wrapAngleTo180_float(entityplayer.rotationYaw - this.thisEntity.rotationYaw) * 0.5F;
  
          if (f > 5.0F) {
              f = 5.0F;
          }
  
          if (f < -5.0F) {
              f = -5.0F;
          }
  
          this.thisEntity.rotationYaw = MathHelper.wrapAngleTo180_float(this.thisEntity.rotationYaw + f);
  
          if (this.currentSpeed < this.maxSpeed) {
              this.currentSpeed += (this.maxSpeed - this.currentSpeed) * 0.01F;
          }
  
          if (this.currentSpeed > this.maxSpeed) {
              this.currentSpeed = this.maxSpeed;
          }
  
          int i = MathHelper.floor_double(this.thisEntity.posX);
          int j = MathHelper.floor_double(this.thisEntity.posY);
          int k = MathHelper.floor_double(this.thisEntity.posZ);
          float f1 = this.currentSpeed;
  
          if (this.speedBoosted) {
              if (this.speedBoostTime++ > this.maxSpeedBoostTime) {
                  this.speedBoosted = false;
              }
  
              f1 += f1 * 1.15F * MathHelper.sin((float) this.speedBoostTime / (float) this.maxSpeedBoostTime * (float) Math.PI);
          }
  
          float f2 = 0.91F;
  
          if (this.thisEntity.onGround) {
              f2 = this.thisEntity.worldObj.getBlockState(new BlockPos(MathHelper.floor_float((float) i), MathHelper.floor_float((float) j) - 1, MathHelper.floor_float((float) k))).getBlock().slipperiness * 0.91F;
          }
  
          float f3 = 0.16277136F / (f2 * f2 * f2);
          float f4 = MathHelper.sin(entitycreature.rotationYaw * (float) Math.PI / 180.0F);
          float f5 = MathHelper.cos(entitycreature.rotationYaw * (float) Math.PI / 180.0F);
          float f6 = entitycreature.getAIMoveSpeed() * f3;
          float f7 = Math.max(f1, 1.0F);
          f7 = f6 / f7;
          float f8 = f1 * f7;
          float f9 = -(f8 * f4);
          float f10 = f8 * f5;
  
          if (MathHelper.abs(f9) > MathHelper.abs(f10)) {
              if (f9 < 0.0F) {
                  f9 -= this.thisEntity.width / 2.0F;
              }
  
              if (f9 > 0.0F) {
                  f9 += this.thisEntity.width / 2.0F;
              }
  
              f10 = 0.0F;
          } else {
              f9 = 0.0F;
  
              if (f10 < 0.0F) {
                  f10 -= this.thisEntity.width / 2.0F;
              }
  
              if (f10 > 0.0F) {
                  f10 += this.thisEntity.width / 2.0F;
              }
          }
  
          int l = MathHelper.floor_double(this.thisEntity.posX + (double) f9);
          int i1 = MathHelper.floor_double(this.thisEntity.posZ + (double) f10);
          int j1 = MathHelper.floor_float(this.thisEntity.width + 1.0F);
          int k1 = MathHelper.floor_float(this.thisEntity.height + entityplayer.height + 1.0F);
          int l1 = MathHelper.floor_float(this.thisEntity.width + 1.0F);
  
          if (i != l || k != i1) {
              Block block = this.thisEntity.worldObj.getBlockState(new BlockPos(i, j, k)).getBlock();
              boolean flag = !this.isStairOrSlab(block) && (block.getMaterial() != Material.air || !this.isStairOrSlab(this.thisEntity.worldObj.getBlockState(new BlockPos(i, j - 1, k)).getBlock()));
  
              if (flag && 0 == WalkNodeProcessor.func_176170_a(this.thisEntity.worldObj, this.thisEntity, l, j, i1, j1, k1, l1, false, false, true) && 1 == WalkNodeProcessor.func_176170_a(this.thisEntity.worldObj, this.thisEntity, i, j + 1, k, j1, k1, l1, false, false, true) && 1 == WalkNodeProcessor.func_176170_a(this.thisEntity.worldObj, this.thisEntity, l, j + 1, i1, j1, k1, l1, false, false, true)) {
                  entitycreature.getJumpHelper().setJumping();
              }
          }
  
          if (!entityplayer.capabilities.isCreativeMode && this.currentSpeed >= this.maxSpeed * 0.5F && this.thisEntity.getRNG().nextFloat() < 0.006F && !this.speedBoosted) {
              ItemStack itemstack = entityplayer.getHeldItem();
  
              if (itemstack != null && itemstack.getItem() == Items.carrot_on_a_stick) {
                  itemstack.damageItem(1, entityplayer);
  
                  if (itemstack.stackSize == 0) {
                      ItemStack itemstack1 = new ItemStack(Items.fishing_rod);
                      itemstack1.setTagCompound(itemstack.getTagCompound());
                      entityplayer.inventory.mainInventory[entityplayer.inventory.currentItem] = itemstack1;
                  }
              }
          }
  
          this.thisEntity.moveEntityWithHeading(0.0F, f1);
      }
  
      private boolean isStairOrSlab(Block blockIn) {
          return blockIn instanceof BlockStairs || blockIn instanceof BlockSlab;
      }
  
      public boolean isSpeedBoosted() {
          return this.speedBoosted;
      }
  
      public void boostSpeed() {
          this.speedBoosted = true;
          this.speedBoostTime = 0;
          this.maxSpeedBoostTime = this.thisEntity.getRNG().nextInt(841) + 140;
      }
  
      public boolean isControlledByPlayer() {
          return !this.isSpeedBoosted() && this.currentSpeed > this.maxSpeed * 0.3F;
      }
  }
  