[1.7.10] Generating textures during startup

[ax1m]

I'm currently working on my mods textures and I'm really annoyed with how inefficient this seems, both in terms of time used and file size created. I basically have a default texture for each tool and item, and then just apply coloring layers to that based on the material. What I would like to do is give it just the default textures instead, define the color values and masks in my code and have it parse all the textures during initialization. I know it has to be possible somehow (right?), but I just have no clue where to even start looking.

I'd really appreciate some pointers in the right direction from the pros on here 

[BusyBeever]

in 1.8 there is ISmartItemModel that you can use, in 1.7.1 it was... IItemModel? Im not sure but there was a way to create dynamic textures on the fly

[ax1m]

Can't find anything of that name, did you perhaps mean IItemRenderer?

[BusyBeever]

exactly!

[ax1m]

alright thanks, I'll have a look at that 

[Choonster]

If you have a greyscale texture, you can override

Item#getColorFromItemStack(ItemStack stack, int renderPass)

to colour it at runtime.

[ax1m]

Thanks, that definitely looks very useful. Now if I only want to color part of a texture (like color only the tool head, and have the handle stay brown), is there a method for that as well or do I have to implement that myself?

[Elix_x]

Thanks, that definitely looks very useful. Now if I only want to color part of a texture (like color only the tool head, and have the handle stay brown), is there a method for that as well or do I have to implement that myself?

Second argument is a render pass.

In 1.7.10 items can have multiple passes (layers).

For that, you have to override

requiresMultipleRenderPasses

and

getRenderPassesCount

(or something like that, forgot exact name).

Then, in

getIcon

, use one with integer parameter, corresponding to pass/layer. Return icon based on that layer.

And you already know what to do in

getColorFromItemStack

.

[Choonster]

You can try using a single texture with both greyscale and pre-coloured parts, but I'm not sure it would work properly (I don't know much about OpenGL).

 

If that doesn't work, you'll need to separate the greyscale and pre-coloured parts into separate textures and render your item in multiple passes. Override the following methods:

• Item#requiresMultipleRenderPasses

  to return

  true

  
  

• Item#getRenderPasses

  to return the number of render passes you need (only if you need more than 2)
  

• Item#getIconFromDamageForRenderPass

  to return the appropriate

  IIcon

  for the render pass
  

• Item#getColorFromItemStack

  to return the appropriate colour for the render pass (or return the super method's result for no colour)

[Draco18s]

Use multiple passes and several textures. That's how my artifacts mod does it.

 

https://github.com/Draco18s/Artifacts/tree/master/main/java/com/draco18s/artifacts/