[1.16.5] How to use DrawHighlightEvent or GLStateManager to highlight an area of blocks where the player is looking at?

[NindyBun]

As the title suggests, I want to somehow highlight or visually show an area of blocks around the place the player is looking at. I heard I can use DrawBlockHighlightEvent and/or GLStateManager but how would I go about doing so?

[SoLegendary]

For 1.16.5 you can check out this example code here:

https://github.com/TheGreyGhost/MinecraftByExample/blob/master/src/main/java/minecraftbyexample/usefultools/debugging/DebugBlockVoxelShapeHighlighter.java

From what I understand it basically cancels DrawBlockHighlightEvent and then goes on to write what the event would do in the first place so that you can adjust its parameters. If you want to change the block to be highlighted for example, you can change the BlockPos variable to whatever coordinate you want. Keep it mind it only ever highlights the wireframe, not the block faces themselves.

If you ever manage to get this working in 1.17.1 please tell me! I've been stuck on this issue for a while

[NindyBun]

On 12/29/2021 at 2:08 PM, SoLegendary said:

For 1.16.5 you can check out this example code here:

https://github.com/TheGreyGhost/MinecraftByExample/blob/master/src/main/java/minecraftbyexample/usefultools/debugging/DebugBlockVoxelShapeHighlighter.java

From what I understand it basically cancels DrawBlockHighlightEvent and then goes on to write what the event would do in the first place so that you can adjust its parameters. If you want to change the block to be highlighted for example, you can change the BlockPos variable to whatever coordinate you want. Keep it mind it only ever highlights the wireframe, not the block faces themselves.

If you ever manage to get this working in 1.17.1 please tell me! I've been stuck on this issue for a while

https://github.com/NindyBun/BurnerGun_1.16.5-3.0.0/blob/master/src/main/java/com/nindybun/burnergun/client/renderer/BlockRenderer.java I just did it this way and it works much better