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My mod has skill trees, and I though of ways to display them. I decided that a system like the achievement GUI would be the best way to go. So how would I draw the actual achievement GUI? I thought I should extend GuiAchievements , but it requires a StatFileWriter in its constructor. The obfuscated fields in GuiAchievements aren't helping either. So is there a way to render a custom GUI like the achievement GUI?

Use the KeyBinding class that comes with forge instead of the LWJGL Keyboard.isKeyDown(). A tutorial on how to use key bindings is here: http://www.minecraftforge.net/wiki/Key_Binding (It's also better to use KeyBindings because the client can change what keys do what.)

Thanks, but I found a better way to do this for my situation. I use the Item#onUpdate method and just store the ticks passed as damage values.

How would I get the amount of ticks passed between two triggers? (e.g. a onItemRightClick trigger) Example: @Override public ActionResult<ItemStack> onItemRightClick(ItemStack stack, World worldIn, EntityPlayer playerIn, EnumHand hand) { int ticks = getTicks(); // gets ticks since the last time getTicks() was called System.out.println(ticks); return new ActionResult(EnumActionResult.PASS, stack); } How would I make the getTicks() method?