Recently I have been updating content from my 1.7.10 mod to 1.12. One of the items I'm converting has a power bar similar to one used by tools, to render the bar I used an implementation of IItemRenderer. I quickly found out that it was removed in 1.8 (Due to the complete rendering overhaul) I am struggling to find examples of how mods are implementing replacements to the pre-1.8 custom renderers. Currently I'm trying to use the renderCustomTooltip event to draw. Is this a good substitute, or is there a better option?
Also, I used the GL11 library and the Tessalator to do the actual drawing in my 1.7.10 version. These seem to have been changed also. What is the best way to draw simple shapes now?
Thanks in advance. This isn't the first thing 1.8 did to make me grind my teeth.