ItemFlycar (Based on ItemBoat)

package fr.Knux14.Stuffies.Flycar;

import java.util.List;

import fr.Knux14.Stuffies.Stuffies;
import net.minecraft.block.Block;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.util.AxisAlignedBB;
import net.minecraft.util.EnumMovingObjectType;
import net.minecraft.util.MathHelper;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.util.Vec3;
import net.minecraft.world.World;

public class ItemFlycar extends Item
{
    public ItemFlycar(int par1)
    {
        super(par1);
        this.maxStackSize = 1;
        this.setUnlocalizedName("stuffies_flycar");
        this.setCreativeTab(Stuffies.instance.tab);
    }

    public ItemStack onItemRightClick(ItemStack is, World wrld, EntityPlayer ep)
    {
    	float f = 1.0F;
        float f1 = ep.prevRotationPitch + (ep.rotationPitch - ep.prevRotationPitch) * f;
        float f2 = ep.prevRotationYaw + (ep.rotationYaw - ep.prevRotationYaw) * f;
        double d0 = ep.prevPosX + (ep.posX - ep.prevPosX) * (double)f;
        double d1 = ep.prevPosY + (ep.posY - ep.prevPosY) * (double)f + 1.62D - (double)ep.yOffset;
        double d2 = ep.prevPosZ + (ep.posZ - ep.prevPosZ) * (double)f;
        Vec3 vec3 = wrld.getWorldVec3Pool().getVecFromPool(d0, d1, d2);
        float f3 = MathHelper.cos(-f2 * 0.017453292F - (float)Math.PI);
        float f4 = MathHelper.sin(-f2 * 0.017453292F - (float)Math.PI);
        float f5 = -MathHelper.cos(-f1 * 0.017453292F);
        float f6 = MathHelper.sin(-f1 * 0.017453292F);
        float f7 = f4 * f5;
        float f8 = f3 * f5;
        double d3 = 5.0D;
        Vec3 vec31 = vec3.addVector((double)f7 * d3, (double)f6 * d3, (double)f8 * d3);
        MovingObjectPosition movingobjectposition = wrld.clip(vec3, vec31, true);

        if (movingobjectposition == null)
        {
            return is;
        }
        else
        {
            Vec3 vec32 = ep.getLook(f);
            boolean flag = false;
            float f9 = 1.0F;
            List list = wrld.getEntitiesWithinAABBExcludingEntity(ep, ep.boundingBox.addCoord(vec32.xCoord * d3, vec32.yCoord * d3, vec32.zCoord * d3).expand((double)f9, (double)f9, (double)f9));
            int i;

            for (i = 0; i < list.size(); ++i)
            {
                Entity entity = (Entity)list.get(i);

                if (entity.canBeCollidedWith())
                {
                    float f10 = entity.getCollisionBorderSize();
                    AxisAlignedBB axisalignedbb = entity.boundingBox.expand((double)f10, (double)f10, (double)f10);

                    if (axisalignedbb.isVecInside(vec3))
                    {
                        flag = true;
                    }
                }
            }

            if (flag)
            {
                return is;
            }
            else
            {
                if (movingobjectposition.typeOfHit == EnumMovingObjectType.TILE)
                {
                    i = movingobjectposition.blockX;
                    int j = movingobjectposition.blockY;
                    int k = movingobjectposition.blockZ;

                    if (wrld.getBlockId(i, j, k) == Block.snow.blockID)
                    {
                        --j;
                    }

                    EntityFlycar entityFC = new EntityFlycar(wrld, (double)((float)i + 0.5F), (double)((float)j + 1.0F), (double)((float)k + 0.5F));
                    entityFC.updateOwner(ep.username);
                    entityFC.rotationYaw = (float)(((MathHelper.floor_double((double)(ep.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3) - 1) * 90);

                    if (!wrld.getCollidingBoundingBoxes(entityFC, entityFC.boundingBox.expand(-0.1D, -0.1D, -0.1D)).isEmpty())
                    {
                        return is;
                    }

                    if (!wrld.isRemote)
                    {
                        wrld.spawnEntityInWorld(entityFC);
                    }

                    if (!ep.capabilities.isCreativeMode)
                    {
                        --is.stackSize;
                    }
                }

                return is;
            }
        }
    }
}