item.java

    Minecraft mc = Minecraft.getMinecraft();
		MovingObjectPosition objectMouseOver = mc.objectMouseOver;
		System.out.println(objectMouseOver.entityHit);
		// makes a variable for where you look
		if (objectMouseOver != null && objectMouseOver.entityHit != null) {
			// checks if you hit an Entity
			Entity target = objectMouseOver.entityHit;
			// make a variable: Target(just so I can use it easier) AND
			// makes it "select the Entity"
			if (target instanceof EntityFlat) /*
											 * or whatever you want recognised
											 */{
				double bX = target.getPosition().getX();
				double bY = target.getPosition().getY();// blockpos.getY() +
														// 1;
				double bZ = target.getPosition().getZ();

				ECEntityRune rune;
				try {

					double xm = 0.125;
					double zm = 0.125;
					double hitX = objectMouseOver.hitVec.xCoord - bX;
					double hitZ = objectMouseOver.hitVec.zCoord - bZ;

					if (hitX < 0.3333) {
						xm = 0.125 + 0.025;
					} else if (hitX > 0.333 * 2) {
						xm = 1 - (0.125 + 0.025);
					} else {
						xm = 0.333 + 0.25 / 2 + 0.05;
					}

					if (hitZ < 0.3333) {
						zm = 0.125 + 0.025;
					} else if (hitZ > 0.333 * 2) {
						zm = 1 - (0.125 + 0.025);
					} else {
						zm = 0.333 + 0.25 / 2 + 0.05;
					}

					if (isEmptyOf(worldIn, bX + xm, bY, bZ + zm)) {
						rune = (ECEntityRune) RuneRegistry.runeClasses.get(id).getConstructor(new Class[] { World.class }).newInstance(new Object[] { worldIn });

						rune.setPosition(bX + xm, bY, bZ + zm);

						if (!worldIn.isRemote)
							worldIn.spawnEntityInWorld(rune);
						if (!playerIn.capabilities.isCreativeMode && playerIn instanceof EntityPlayerMP) {

							itemStackIn.stackSize--;
						}

					}
					int currentItem = playerIn.inventory.currentItem;
					playerIn.inventory.setInventorySlotContents(currentItem, itemStackIn);
				} catch (InstantiationException e) {

					e.printStackTrace();
				} catch (IllegalAccessException e) {

					e.printStackTrace();
				} catch (IllegalArgumentException e) {

					e.printStackTrace();
				} catch (InvocationTargetException e) {

					e.printStackTrace();
				} catch (NoSuchMethodException e) {

					e.printStackTrace();
				} catch (SecurityException e) {

					e.printStackTrace();

				}
			}
		}