I'm trying to make a ray-based weapon that damages the entity that the player is aiming at. Currently I am using Minecraft#objectMouseOver on the client and sending a packet to the server for processing, but it has a limited range. Another option I saw was EntityPlayer#rayTrace method, but it never returned an entity hit.

 

Code:

	@Override
	public ActionResult<ItemStack> onItemRightClick(World world, EntityPlayer player, EnumHand hand) {
		if(world.isRemote) {
			RayTraceResult ray = Minecraft.getMinecraft().objectMouseOver;

			if(ray.typeOfHit == Type.ENTITY && ray.entityHit != null && ray.entityHit instanceof EntityLivingBase) {
				EntityLivingBase entity = (EntityLivingBase) ray.entityHit;

				SlippWorld.channel.sendToServer(new MessageTargetEntity(entity, player.getHeldItem(hand)));
			}
		}

		return new ActionResult(EnumActionResult.SUCCESS, player.getHeldItem(hand));
	}

 

Is there a better option for casting a longer ray that will hit entities and blocks?

Edited April 25, 20178 yr by TLHPoE

I dug around to find the source of MInecraft#objectMouseOver, and it's actually set using Entity#rayTrace. How come when I try to use the method myself it doesn't detect entities?

	@Override
	public ActionResult<ItemStack> onItemRightClick(World world, EntityPlayer player, EnumHand hand) {
		if(world.isRemote) {
			RayTraceResult ray = player.rayTrace(5F, 1F);
			System.out.println("Casting ray");

			if(ray.entityHit != null && ray.typeOfHit == Type.ENTITY && ray.entityHit instanceof EntityLivingBase) {
				EntityLivingBase entity = (EntityLivingBase) ray.entityHit;

				SlippWorld.channel.sendToServer(new MessageTargetEntity(entity, player.getHeldItem(hand)));

				System.out.println("Attack sent");
			}

			for(int i = 0; i < 3; i++) {
				Minecraft.getMinecraft().entityRenderer.itemRenderer.updateEquippedItem();
			}
		}

		return new ActionResult(EnumActionResult.PASS, player.getHeldItem(hand));
	}

 

The only variable I feel iffy passing for the ray is the partialTick, which I'm not sure what to put there, only that it should be between 0F and 1F.

https://github.com/DarkRoleplay/Dark-Roleplay-Core/blob/1.11-Rework/src/main/java/net/dark_roleplay/drpcore/client/events/player/Event_Mouse.java
That's how I solved it, I used a tutorial for that but cannot find it. Hoping the code is understandable.

And the IExtendedItem ist just an Interface containing a method to get the Items range.