fix chunk border rendering

[Plastoid501]

fix #2125. I didn't know where to put the file, so I put it under net/irisshaders/iris/mixin. I would appreciate it if you could move it to an appropriate location.

[IMS212]

Would it be possible to add comments explaining what these do?

[Plastoid501]

Normally, overlapping lines make the line drawn later visible. In this case, however, the first line was visible. So I deleted the unwanted line drawn at the beginning of the overlapping lines. The isCameraChunk and isSubChunk methods make the red vertical line and the blue SubChunkBorder line correctly visible.

[Plastoid501]

The process of the @.Slice part is isCameraChunk, which draws red vertical lines in the corners of a 3x3 chunk centered on the chunk with the camera, and isSubChunk, which draws yellow lines every 2 blocks and dark cyan lines every 8 blocks. So isCameraChunk cancels the process of drawing the corners of the chunk with the camera, and isSubChunk cancels the process of drawing the borders of the subchunks every 16 blocks.

[IMS212]

Can you rebase this onto multiloader-new?

[Plastoid501]

Sorry, I must have made a mistake with the rebase. I don't know how to fix it, so should I change the branch to multiloader-new and Pull Request it again? I am so sorry.

[fayer3]

you need to change the target branch in the PR
click on edit in the top right, and change the base branch

[Plastoid501]

Is this correct? Sorry for the disturbance.

[fayer3]

looks fine to me now

[IMS212]

Thanks!