Differences

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--- zh_cn:tutorial:directionalblock [2022/02/19 01:53] – [定义方块状态] style: code formatting xtexchooser
+++ zh_cn:tutorial:directionalblock [2024/12/08 14:06] (current) – [下一步] solidblock
@@ Line 1: / Line 1: @@
-==== 带有方向的方块 ====
+====== 制作带朝向的方块 ======
-使方块带有方向（朝向特定的方向）也是通过方块状态完成的。
+使方块带有方向（朝向特定的方向）也是通过方块状态完成的。这个例子介绍了垂直版的安山岩台阶。
-这个例子介绍了垂直版的安山岩台阶。
 {{:tutorial:vertslab.png?200|}}
-<code java>
+<code java VerticalSlabBlock.java>
-public class PolishedAndesiteSideBlock extends HorizontalFacingBlock {
+public class VerticalSlabBlock extends HorizontalFacingBlock {
+	// codec 从 1.20.5 开始是必需的，但是还没有在 Minecraft 中实际使用。
+	public static final MapCodec<VerticalSlabBlock> CODEC = Block.createCodec(VerticalSlabBlock::new);
-	public PolishedAndesiteSideBlock(Settings settings) {
+	public VerticalSlabBlock(Settings settings) {
 		super(settings);
-		setDefaultState(this.stateManager.getDefaultState().with(Properties.HORIZONTAL_FACING, Direction.NORTH));
+		setDefaultState(getDefaultState().with(Properties.HORIZONTAL_FACING, Direction.NORTH));
 	}
 	@Override
-	protected void appendProperties(StateManager.Builder<Block, BlockState> stateManager) {
+	protected MapCodec<? extends VerticalSlabBlock> getCodec() {
-		stateManager.add(Properties.HORIZONTAL_FACING);
+		return CODEC;
 	}
 	@Override
-	public VoxelShape getOutlineShape(BlockState state, BlockView view, BlockPos pos, EntityContext ctx) {
+	protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
+		builder.add(Properties.HORIZONTAL_FACING);
+	}
+	@Override
+	public VoxelShape getOutlineShape(BlockState state, BlockView world, BlockPos pos, ShapeContext ctx) {
 		Direction dir = state.get(FACING);
-		switch(dir) {
+		return switch (dir) {
-			case NORTH:
+			case NORTH -> VoxelShapes.cuboid(0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.5f);
-				return VoxelShapes.cuboid(0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.5f);
+			case SOUTH -> VoxelShapes.cuboid(0.0f, 0.0f, 0.5f, 1.0f, 1.0f, 1.0f);
-			case SOUTH:
+			case EAST -> VoxelShapes.cuboid(0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f);
-				return VoxelShapes.cuboid(0.0f, 0.0f, 0.5f, 1.0f, 1.0f, 1.0f);
+			case WEST -> VoxelShapes.cuboid(0.0f, 0.0f, 0.0f, 0.5f, 1.0f, 1.0f);
-			case EAST:
+			default -> VoxelShapes.fullCube();
-				return VoxelShapes.cuboid(0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f);
+		};
-			case WEST:
-				return VoxelShapes.cuboid(0.0f, 0.0f, 0.0f, 0.5f, 1.0f, 1.0f);
-			default:
-				return VoxelShapes.fullCube();
-		}
 	}
+        @Override
 	public BlockState getPlacementState(ItemPlacementContext ctx) {
-		return (BlockState)this.getDefaultState().with(FACING, ctx.getPlayerFacing());
+		return super.getPlacementState(ctx).with(Properties.HORIZONTAL_FACING, ctx.getHorizontalPlayerFacing().getOpposite());
 	}
@@ Line 43: / Line 45: @@
 </code>
+然后按照在 [[blocks]] 中提到的方法，注册方块：
+<code java TutorialBlocks.java>
+public final class TutorialBlocks implements ModInitializer {
+    [...]
+    public static final VerticalSlabBlock POLISHED_ANDESITE_VERTICAL_SLAB = register("polished_andesite_vertical_slab",
+        new VerticalSlabBlock(Block.Settings.copy(Blocks.POLISHED_ANDESITE)));
+}
+</code>
-==== 定义方块状态 ====
+==== 定义方块状态 JSON ====
-polished_andesite_side_block.json
+<code javascript src/main/resources/assets/tutorial/blockstates/polished_andesite_vertical_slab.json>
-<code>
 {
   "variants": {
-    "facing=north": { "model": "bitmod:block/polished_andesite_side_block" },
+    "facing=north": { "model": "tutorial:block/polished_andesite_vertical_slab", "uvlock": true },
-    "facing=east":  { "model": "bitmod:block/polished_andesite_side_block", "y": 90 },
+    "facing=east":  { "model": "tutorial:block/polished_andesite_vertical_slab", "y":  90, "uvlock": true },
-    "facing=south": { "model": "bitmod:block/polished_andesite_side_block", "y": 180 },
+    "facing=south": { "model": "tutorial:block/polished_andesite_vertical_slab", "y": 180, "uvlock": true },
-    "facing=west":  { "model": "bitmod:block/polished_andesite_side_block", "y": 270 }
+    "facing=west":  { "model": "tutorial:block/polished_andesite_vertical_slab", "y": 270, "uvlock": true }
   }
 }
 </code>
 ==== 定义方块模型 ====
+<code javascript src/main/resources/assets/tutorial/models/block/vertical_slab.json>
-side.json
-<code>
 {   "parent": "block/block",
     "textures": {
@@ Line 72: / Line 79: @@
             "to": [  16, 16, 8 ],
             "faces": {
-                "down":  { "uv": [ 0, 8, 16, 16 ], "texture": "#bottom", "cullface": "down" },
+                "down":  { "texture": "#bottom", "cullface": "down" },
-                "up":    { "uv": [ 0, 8, 16, 16 ], "texture": "#top",    "cullface": "up" },
+                "up":    { "texture": "#top",    "cullface": "up" },
-                "north": { "uv": [ 0, 0, 16, 16 ], "texture": "#side",   "cullface": "north" },
+                "north": { "texture": "#side",   "cullface": "north" },
-                "south": { "uv": [ 0, 0, 16, 16 ], "texture": "#side"  },
+                "south": { "texture": "#side",   "cullface": "south" },
                 "west":  { "texture": "#side",   "cullface": "west" },
                 "east":  { "texture": "#side",   "cullface": "east" }
@@ Line 84: / Line 91: @@
 </code>
-polished_andesite_side_block.json
+<code javascript src/main/resources/assets/tutorial/models/block/polished_andesite_vertical_slab.json>
-<code>
 {
-    "parent": "bitmod:block/side",
+    "parent": "tutorial:block/vertical_slab",
     "textures": {
         "bottom": "block/polished_andesite",
@@ Line 95: / Line 101: @@
 }
 </code>
+===== 定义方块的旋转和翻转 =====
+对于带有朝向的方块，你需要覆盖 ''rotate'' 和 ''mirror'' 方法，这样在结构方块中可以正确地被旋转或者翻转。不过，在这个例子中，''HorizontalFacingBlock'' 类已经帮你做好了。
+===== 影响寻路 =====
+如果在游戏内放置这些方块，可能会发现个问题，生物寻路时，会尝试这些方块，似乎这些方块不存在，结果被这些方块阻挡。这是因为，生物会将这些非完整的方块视为不挡路的方块。要修改这一寻路行为，需要修改 ''canPathfindThrough'' 方法：
+<code java>
+  @Override
+  protected boolean canPathfindThrough(BlockState state, NavigationType type) {
+    return false;
+  }
+</code>
+在原版中，有些方块有不同的路径节点类型（path node type）。例如，生物会避免危险的方块，比如岩浆块、凋零玫瑰和仙人掌。你也可以让你的生物以不同方式对待这些方块，方法就是利用 Fabric API 中的 ''LandPathNodeTypesRegistry'' 修改路径节点类型。
+===== 下一步 =====
+尝试让它[[waterloggable|可含水]]