src/game/java/net/minecraft/client/renderer/FaceInfo.java

package net.minecraft.client.renderer;

import net.minecraft.Util;
import net.minecraft.core.Direction;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public enum FaceInfo {
    DOWN(
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MAX_Z)
    ),
    UP(
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MIN_Z)
    ),
    NORTH(
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MIN_Z)
    ),
    SOUTH(
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MAX_Z)
    ),
    WEST(
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MIN_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MAX_Z)
    ),
    EAST(
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MAX_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MIN_Y, FaceInfo.Constants.MIN_Z),
        new FaceInfo.VertexInfo(FaceInfo.Constants.MAX_X, FaceInfo.Constants.MAX_Y, FaceInfo.Constants.MIN_Z)
    );

    private static final FaceInfo[] BY_FACING = Util.make(new FaceInfo[6], p_108987_ -> {
        p_108987_[FaceInfo.Constants.MIN_Y] = DOWN;
        p_108987_[FaceInfo.Constants.MAX_Y] = UP;
        p_108987_[FaceInfo.Constants.MIN_Z] = NORTH;
        p_108987_[FaceInfo.Constants.MAX_Z] = SOUTH;
        p_108987_[FaceInfo.Constants.MIN_X] = WEST;
        p_108987_[FaceInfo.Constants.MAX_X] = EAST;
    });
    private final FaceInfo.VertexInfo[] infos;

    public static FaceInfo fromFacing(Direction p_108985_) {
        return BY_FACING[p_108985_.get3DDataValue()];
    }

    private FaceInfo(final FaceInfo.VertexInfo... p_108981_) {
        this.infos = p_108981_;
    }

    public FaceInfo.VertexInfo getVertexInfo(int p_108983_) {
        return this.infos[p_108983_];
    }

    @OnlyIn(Dist.CLIENT)
    public static final class Constants {
        public static final int MAX_Z = Direction.SOUTH.get3DDataValue();
        public static final int MAX_Y = Direction.UP.get3DDataValue();
        public static final int MAX_X = Direction.EAST.get3DDataValue();
        public static final int MIN_Z = Direction.NORTH.get3DDataValue();
        public static final int MIN_Y = Direction.DOWN.get3DDataValue();
        public static final int MIN_X = Direction.WEST.get3DDataValue();
    }

    @OnlyIn(Dist.CLIENT)
    public static class VertexInfo {
        public final int xFace;
        public final int yFace;
        public final int zFace;

        VertexInfo(int p_109002_, int p_109003_, int p_109004_) {
            this.xFace = p_109002_;
            this.yFace = p_109003_;
            this.zFace = p_109004_;
        }
    }
}