Textures with programmatic colors

[gotet]

Where should I look in the server code to find where textures with gray pixels are tinted?

(Examples are grass or redstone dust).

 

I have found out that they do that according to the colors calculated from BlockColors.java

but I dont know where the math or opengl tricks occurs.

 

Is it like I assume, color multiplication that is happening?

 

I am maybe blind, but where do I find the possible color values for redstone dust?

Edited August 10, 2020 by gotet

[Draco18s]

1 hour ago, gotet said:

server code

1 hour ago, gotet said:

textures

 

Textures are client side only. You will not find any server code related to colorization.

 

For redstone wire, the math is in RedstoneWire#colorMultiplier().

All it does is return a color (255 RGB as a single unsigned integer) that is then multiplied against the texture when it is rendered.

As for where OpenGL gets involved? Dunno, its buried inside the ModelBakery.

Edited August 10, 2020 by Draco18s

[gotet]

When I searched in eclipse in version 1.16.1-32.0.108, I only found one file containing "colormultiplier": output.srg.

[Draco18s]

I don't have a 1.16 workspace, but its a method that returns an int and has a line that looks like "return -16777216 | i << 16 | j << 8 | k;" (the "-16777216" part is just FF for alpha, already bit-shifted).

Alternatively, dig into where BlockColors gets referenced and how.

[gotet]

Hm, I dont even know how to search for the text 16777216. File search in eclipse seems broken.

[Draco18s]

Don't search the whole project for that string, search in RedstoneWireBlock. Or go to BlockColors and look at how RedstoneWire's color gets registered and work backwards.

[gotet]

Yeah, got it!

 

static {
      for(int i = 0; i <= 15; ++i) {
         float f = (float)i / 15.0F;
         float f1 = f * 0.6F + (f > 0.0F ? 0.4F : 0.3F);
         float f2 = MathHelper.clamp(f * f * 0.7F - 0.5F, 0.0F, 1.0F);
         float f3 = MathHelper.clamp(f * f * 0.6F - 0.7F, 0.0F, 1.0F);
         field_235542_k_ = new Vector3f(f1, f2, f3);
      }

   }

[gotet]

Could not remove this comment.

Edited August 11, 2020 by gotet

[Draco18s]

57 minutes ago, gotet said:

Yeah, got it!

Yep, definitely changed and a lot. Didn't really expect that, but I knew the process that I'd use to locate the relevant bit of code. That is, I knew BlockColors was involved and that something got registered.