See the link... you need to send description packets..

No, this is not the issue here. Description packets go server to client.

Oh... fact... 

 

If the action is defined in the button see the part of client>server packet with the enchant button(It's for 1.7.10, maybe work for 1.8... ): http://www.minecraftforge.net/wiki/Tile_Entity_Synchronization

Idea: Just put a simple flat bounding box on the base of the block, when the player clicks... whoop...

If you make variables static, they will be the same value for all the blocks... change this...

 

And well here we go again: http://www.minecraftforge.net/wiki/Tile_Entity_Synchronization

See the link... you need to send description packets..

Try "worldObj.markBlockForUpdate(pos);" to update the block, or markDirty(), when you close/open the GUI (or ever if it is open).

 

Tip: http://www.minecraftforge.net/wiki/Tile_Entity_Synchronization

Try something like this..

 

@Override
public void onUpdate(ItemStack stack, World world, Entity entity, int itemSlot, boolean isSelected) 
{
	if(!world.isRemote && entity instanceof EntityPlayer && ((EntityPlayer) entity).getCurrentEquippedItem() != null)
	{

		if(((EntityPlayer) entity).isSprinting())
		{
			this.sprint = true;
			System.out.println("aaaa");
		}
		else
		{
			this.counter++;
			if(this.counter>5)
			{
				this.counter=0;
				this.sprint = false;
			}
		}
	}
}

 

 

Tested here.. this function cannot be used for this...

 

Same if trying with onLeftClickEntity()..

 

 

Probably when you hit anything you stop the sprint action.

 

Try a sync with onupdate call to create a "ghost sprint status" inside the sword...

 

example:

 

on update: if player is sprinting set flag to true.. if player not sprinting count 3 ticks and set flag to false.

 

onhit/onleftclickentity: if flag true, do more damage.

 

 

Maybe it can work...

Rendering is only client side... and inside init...

 

See Wuppy's tutorial about: http://www.wuppy29.com/minecraft/1-8-tutorial/updating-1-7-to-1-8-part-2-basic-items/#sthash.bOpz3XcG.dpbs

>Put the render calls in the "init" block...

 

>Verify the location of your textures...

 

 

Show the folder structure(image) and complete class plz. ^^'