Hey everyone,

I tried my hand at some X and Z rotating to save myself a bunch of models on my connected model, but it seems "z": 90 doesn't to anything. "x":90 works just fine and so does "y":90, but z seems to be completely ignored. Why could this be and how can I fix it?

Here's my BlockState (it's a long one):

{
  "forge_marker": 1,
  "variants": {
    "normal": [
      {"model": "kaidencraft:boilertank/single.obj"}
    ],
    "inventory": [
      {}
    ],
    "mb_part": {
      "single": {
        "model": "kaidencraft:boilertank/single.obj"
      },
      "end": {
        "model": "kaidencraft:boilertank/pillar_bottom.obj",
        "x": 90
      },
      "line_edge": {
        "model": "kaidencraft:boilertank/pillar_center.obj",
        "z": 90
      },
      "corner": {
        "model": "kaidencraft:boilertank/end.obj",
        "z": 90
      },
      "edge": {
        "model": "kaidencraft:boilertank/edge_single.obj"
      },
      "center": {
        "model": "kaidencraft:boilertank/center_single.obj"
      },
      "bottom_end": {
        "model": "kaidencraft:boilertank/end.obj"
      },
      "bottom_edge": {
        "model": "kaidencraft:boilertank/edge.obj"
      },
      "bottom_corner": {
        "model": "kaidencraft:boilertank/corner.obj"
      },
      "bottom_center": {
        "model": "kaidencraft:boilertank/center_top.obj",
        "x": 180
      },
      "bottom_pillar": {
        "model": "kaidencraft:boilertank/pillar_bottom.obj"
      },
      "center_end": {
        "model": "kaidencraft:boilertank/edge_single.obj",
        "x": 90, "z": 90
      },
      "center_corner": {
        "model": "kaidencraft:boilertank/edge.obj",
        "z": 90,
        "x": 90
      },
      "center_edge": {
        "model": "kaidencraft:boilertank/center_top.obj",
        "x": 270
      },
      "center_line_edge": {
        "model": "kaidencraft:boilertank/center_single.obj",
        "x": 90
      },
      "center_pillar": {
        "model": "kaidencraft:boilertank/pillar_center.obj"
      },
      "top_end": {
        "model": "kaidencraft:boilertank/end.obj",
        "z": 180
      },
      "top_corner": {
        "model": "kaidencraft:boilertank/corner.obj",
        "x": 180
      },
      "top_edge": {
        "model": "kaidencraft:boilertank/edge.obj",
        "x": 90
      },
      "top_line_edge": {
        "model": "kaidencraft:boilertank/edge_single.obj",
        "x": 90
      },
      "top_pillar": {
        "model": "kaidencraft:boilertank/pillar_bottom.obj",
        "x": 180
      },
      "top_center": {
        "model": "kaidencraft:boilertank/center_top.obj"
      },
      "hidden": {
        "model": "kaidencraft:blank.obj"
      }
    },
    "facing": {
      "north": {},
      "south": {
        "y": 180
      },
      "west": {
        "y": 270
      },
      "east": {
        "y": 90
      }
    }
  },
  "defaults": {
    "model": "kaidencraft:boilertank/single.obj",
    "textures": {
      "#initialShadingGroup": "kaidencraft:block/boiler_main"
    }
  }
}

The part I'm testing with is "corner", which rotates fine when I put in an x rotation, but does nothing when I put in various z rotations.

Cheers in advance

 

Edit for posterity: You can get any transforms you want using forge specific BlockState parts - see Forge Blockstate V1 specs for all details. Only the last specified transform will be applied - this includes simple rotation like you would use in a facing variant.

Edited July 5, 20178 yr by BenignBanana

Minecraft and Forge didn't add the "z" rotation tag because you can replicate it with a combination of the "x" and "y" tag.

Just now, larsgerrits said:

Minecraft and Forge didn't add the "z" rotation tag because you can replicate it with a combination of the "x" and "y" tag.

Can you tell me how to do that specifically? I'm terrible at 3D visualization and vector math. Also, would the y rotation work additively with the facing?

I haven't done this in a while, but I think that if you set the "y" tag to 90, any rotation on the x-axis will apply to the z-axis instead.

6 minutes ago, larsgerrits said:

I haven't done this in a while, but I think that if you set the "y" tag to 90, any rotation on the x-axis will apply to the z-axis instead.

Yea I figured that out now with some hand moving and loading a test object into Maya  But I'm still struggling to understand how that will interact with the facing property that I use for Y rotation.

Yea this definitely doesn't work. After recreating the BlockState scenarios in Maya it seems that Y is always applied after X, making this trick impossible. Applying y 270 first, then x 90 gives me the correct result in Maya (as it should), but what I see in Minecraft is equivalent to applying x 90 first, then y 270. This is what I did in my JSON:

      "corner": {
        "model": "kaidencraft:boilertank/end.obj",
        "y": 270, "x": 90
      },

 

Edited July 4, 20178 yr by BenignBanana

Is there no way to do this other than baking the y rotation into a copy of the model?

Probably not.

Minecraft does not encode a z-axis rotation as it treats it identically to an x-axis rotation.

Yea I looked at the ModelRotation code. That's some of the most inflexible code I've ever seen. Guess I'll just have to bake it in then. Anyways, thanks for the help.

Just posting one last update here for anyone who sees this in the future. Turns out there IS a way to rotate around the Z axis, it's just really hard to find. I stumbled upon it after googling for blockstate transforms (as in moving the model). See Forge Blockstate V1 specs for all the details. Do keep in mind that any Y rotation you may do in a facing variant will override these transforms.