[1.6.4] How to change part of the texture of a block?

[andreidim]

Hello everyone I'm working on a mod and I need to change dinamically based on a variable in my tile entity a part of the texture, like a progress bar but for something else, how could I do that? A few good examples I know are the energy cells from from thermal expansion and the machines from forestry.

Is that hard to do? I don't have any open source mods to check out that do that... Why are there closed source mods? Yes, I know, but still, I want to see all of the sources, I like to learn new stuff, mostly how Azanor does his particles and stuff

[Draco18s]

How is your block being rendered?  ISimpleBlockRenderingHandler, TileEntitySpecialRenderer, or neither?

[andreidim]

If I will have a TE and stuff, should I use a TileEntitySpecialRenderer? I will have it look like a normal square block, but I need it to have textures that can change.

I never used an ISimpleBlockRenderingHandler because the only thing I used special renderers for was a chest-like thing that still has no animation and sound ;(

What do you think I should use?

[Draco18s]

You don't need a TESR, I was asking if you were using one.

 

For a full cube you can either go the standard block renderer route or you can go ISimpleBlockRenderingHandler, if the default renderer won't work for you.

 

Likely the default renderer will work and you just need to write a getIcon() function to handle your needs.  There's one in the Block class that has an IBlockAccess or World parameter passed to it.  Use that parameter to get your TE and determine the state and which Icon should be returned as a result.

[andreidim]

Is there a way to combine icons? I need a lot of different states for my block, I don't want to have a lot of textures

[Draco18s]

Yes.  Use multiple passes.  First pass renders the background, second pass uses the overlay.

 

Here's an example for an Item, but I'm pretty sure Blocks can do it too.

 

https://github.com/Draco18s/Artifacts/blob/master/draco18s/artifacts/item/ItemArtifact.java

 

(Keeping in mind that I'm using NBT data to store which icon to use and the icons themselves are stored in an API referenced hashtable)

 

If it doesn't work in a similar manner, an ISimpleBlockRenderingHandler will work

 

https://github.com/Draco18s/Artifacts/blob/master/draco18s/artifacts/client/RenderArrowTrap.java

Line 109 renders the base texture and the switch statement on 110 renders an overlay across one face.  Not the best code in the world, but it works, so I haven't cleaned it up.

[andreidim]

Multiple render passes seem good enough, thanks

[Draco18s]

Multiple render passes seem good enough, thanks

 

I figured.

I tend to do really bizarre things when I mod.  Works out to be great examples in so many ways for much simpler purposes.  I didn't know about multiple render passes when I did that block, though.  It dates about six months older than the Item...I should redo how several of the blocks are rendered.  The spikes block uses three textures (I could probably just use setTextureOffset instead!)