4980d6e81f
新增 mcfold/fine.py：把 M3 状态层的区块灌进细渲染器 - chunks_to_sections：铺平顺序 = (y<<8)|(z<<4)|x（与 Java PalettedContainer 一致） ★ 错一位不报错、只是地形静默错位 ⇒ 判据用构造数据打这个点 - 缺失的 section **省略**而非填 0（0=空气，把「没数据」渲染成空洞） - render_from_state：单次调用，失败全部返回 ok:false + why + how_to 新增 mcfold/photo.py：capture_photo - propose_shots 用**粗渲染观察**生成机位候选（正面/斜侧/俯视/远景/当前位置）， 每个都带「为什么选它」的依据；候选阶段不出图（省时省钱） - 构图好坏是审美判断=决策，工具不替 agent 选 ★ 关键发现：桥接比预想的干净 原以为要把 state id 反算成 name[props]，但 Java 侧 set_blocks 收的 **本来就是 state id**（走官方 LevelChunk API），而 state id 本身含属性 ⇒ 无损、无需转换。 修的真 bug： 1. ★★ HUD 没隐藏：桥层 RenderBackend.set_view 早有 hide_gui （→ 官方 options.hideGui），但 WorldRenderer **没有这个入口** ⇒ AttributeError 被 except: pass 吞掉 ⇒ 出图带生命条/饥饿/物品栏， 而返回值仍写 hide_gui: True（自相矛盾） 教训：桥层有能力 ≠ 上层有入口；except: pass 让「以为设了」与 「实际没设」无法区分。现在 hide_gui 设不上就显式失败。 2. 俯视机位朝向不自洽（水平 yaw 退化却配写死的 pitch）→ 3D dot=0.82。 改为由位置向量反算 yaw/pitch；正面/斜侧/远景同样修正。 3. inject_world 的 ok 自相矛盾（无区块时 ok=True 却说「没有可渲染的区块」） 4. 缺失 section 被填 0 冒充空气 实测出图：854×480、1902 种颜色，地形/天空/月亮/草地纹理正确。 判据 17 项；2 项变异全被抓。 ★ 「机位朝向」判据我第一版只比水平分量 ⇒ 俯视机位恒为 0 会判红， 改为完整 3D 点积（dot > 0.99）。 200 项全通过。
462 lines
20 KiB
Python
462 lines
20 KiB
Python
"""把世界数据渲染成画面 —— mcfold 的对外渲染入口。
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分工（与设计文档附录 D 一致）：
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本模块（Python） : 世界数据 —— 区块、方块、光照、相机
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客户端 jar（Java）: 方块名与 state id 的权威映射 + 画面
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为什么 state id 必须由渲染器侧解析：
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存档 palette 里是**方块名**（`minecraft:oak_log[axis=y]`），
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而网络载荷要 **state id**。名字→id 的映射随版本/加载器/mod 变化，
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只有客户端自带的注册表是权威的（1.20.1 不由网络下发，附录 D）。
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用法：
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from mcfold.render import WorldRenderer
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with WorldRenderer.open(instance) as wr:
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wr.load_save("/home/mc-test/mc-test", center=(-1, -1), radius=3)
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wr.camera(x=8, y=80, z=8, yaw=135, pitch=35)
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img = wr.screenshot("/tmp/out.png")
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"""
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from __future__ import annotations
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import base64
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import os
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from dataclasses import dataclass, field
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from pathlib import Path
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from typing import Any, Iterable
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from . import anvil
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from .backends import backend_class, detect_generation
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from .backends.base import BackendError, RenderBackend, RenderResult
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# ── 协议层常量（与版本无关，协议本身定义）──
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SECTION_VOLUME = 16 * 16 * 16 # 一个 section 的方块数
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BIOME_VOLUME = 4 * 4 * 4 # 一个 biome section 的值数
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# ── 世界尺寸：★ 不硬编码，运行时问 Java ──
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# 这些量随版本/世界类型变（1.20 起 worldHeight 384、minSection -4；
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# 更早的版本是 256/-0）。Python 只做路由与协议编解码，
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# 版本相关的量由后端回答（cmd="capacity"）。
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# 下面三个仅在没有后端时的降级默认值。
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FALLBACK_SECTION_COUNT = 24
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FALLBACK_MIN_SECTION_Y = -4
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FALLBACK_DEFAULT_BIOME = "minecraft:plains"
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def _decode_storage(longs: Iterable[int], volume: int, bits: int) -> list[int]:
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"""int[] 位数组 → 索引列表（不跨 long）。"""
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longs = list(longs)
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if bits == 0 or not longs:
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return [0] * volume
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vpl = 64 // bits
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mask = (1 << bits) - 1
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out = []
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for i in range(volume):
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li = i // vpl
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if li >= len(longs):
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out.append(0); continue
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off = (i - li * vpl) * bits
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out.append((longs[li] >> off) & mask)
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return out
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@dataclass
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class SaveChunk:
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"""存档里一个区块的、已解析好的方块与生物群系。"""
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cx: int
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cz: int
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status: str = ""
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sections: dict[int, dict] = field(default_factory=dict) # y_idx -> {"palette": [名字], "states": [4096 名字], "biomes": [64 名字]}
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palette_specs: list[str] = field(default_factory=list) # 全部去重后的方块名(+属性)规格
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def _props_to_spec(name: str, props: dict | None) -> str:
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"""{'Name':'minecraft:oak_log','Properties':{'axis':'y'}} → 'minecraft:oak_log[axis=y]'"""
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if not props:
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return name
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parts = ",".join(f"{k}={v}" for k, v in sorted(props.items()))
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return f"{name}[{parts}]"
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def parse_save_chunk(cx: int, cz: int, nbt: dict) -> SaveChunk:
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"""存档区块 NBT → SaveChunk（方块用**名字规格**表示，state id 留给渲染器解析）。"""
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ch = SaveChunk(cx=cx, cz=cz, status=str(nbt.get("Status", "")))
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specs_seen: set[str] = set()
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by_y: dict[int, dict] = {}
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for s in nbt.get("sections", []) or []:
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sy = s.get("Y")
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if sy is None:
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continue
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bs = s.get("block_states")
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if not isinstance(bs, dict):
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continue
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palette = bs.get("palette") or []
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spec_list = [
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_props_to_spec(str(p.get("Name", "minecraft:air")), p.get("Properties"))
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for p in palette
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]
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for sp in spec_list:
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specs_seen.add(sp)
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# 存档 data 是「按 long 打包的调色板索引」（无 varint 前缀）
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storage = bs.get("data") or []
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n = len(spec_list)
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if n <= 1:
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states = [spec_list[0] if spec_list else "minecraft:air"] * SECTION_VOLUME
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else:
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bits = max(4, (n - 1).bit_length())
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idxs = _decode_storage(storage, SECTION_VOLUME, bits)
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states = [spec_list[i] if i < n else "minecraft:air" for i in idxs]
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# 生物群系：同样结构，4x4x4
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bio = s.get("biomes") or {}
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bio_pal = bio.get("palette") or []
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bio_specs = [
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(p if isinstance(p, str) else str(p.get("Name", "minecraft:plains")))
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for p in bio_pal
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]
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if not bio_specs:
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biomes = ["minecraft:plains"] * BIOME_VOLUME
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elif len(bio_specs) == 1:
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biomes = [bio_specs[0]] * BIOME_VOLUME
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else:
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bb = max(1, (len(bio_specs) - 1).bit_length())
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bidx = _decode_storage(bio.get("data") or [], BIOME_VOLUME, bb)
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biomes = [bio_specs[i] if i < len(bio_specs) else "minecraft:plains" for i in bidx]
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by_y[int(sy)] = {"palette": spec_list, "states": states, "biomes": biomes}
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ch.sections = by_y
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ch.palette_specs = sorted(specs_seen)
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return ch
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class WorldRenderer:
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"""世界 → 画面。持有一个常驻 Java 渲染器进程。"""
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def __init__(self, bridge: RenderBackend, instance: Any | None = None):
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self.bridge = bridge
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self.instance = instance
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self._spec_cache: dict[str, int] = {}
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self._loaded: set[tuple[int, int]] = set()
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self.chunks: dict[tuple[int, int], SaveChunk] = {}
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self._capacity: dict[str, Any] | None = None
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self._biome_id: int | None = None
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# ---------------- 构造 ----------------
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@classmethod
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def open(cls, instance: Any = None, *, store: str | None = None,
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classpath: str | None = None, start: bool = True,
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java: str = "java", client_jar: str | None = None,
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generation: str | None = None, launcher: str = "",
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mods_dir: str | None = None) -> "WorldRenderer":
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"""从 instance（mcfold.instance.Instance）或 store 目录打开渲染器。
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classpath 缺省取环境变量 MCFOLD_RENDER_CLASSPATH；
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可先跑 mcfold/scaffold/build.sh 生成。
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"""
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game_dir = assets = asset_index = None
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# ★ 版本隔离策略：产物在**内容根**的 .mcfold/ 下（可只读共享），
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# 不是 /tmp（tmpfs，重启即丢）。见 scaffold/build.sh。
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content_root = None
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if instance is not None:
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cr = getattr(instance, "content_root", None)
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if cr:
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content_root = Path(cr)
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elif store:
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content_root = Path(store) if Path(store).name.startswith(("vanilla-", "forge-",
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"fabric-", "neoforge-", "quilt-")) else None
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if content_root is not None and (content_root / ".mcfold").is_dir():
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mf = content_root / ".mcfold"
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if (mf / "classes").is_dir():
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# 内容根产物优先（除非调用方显式给了 classpath）
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if classpath is None:
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cp_file = mf / "classpath.txt"
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parts = []
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if cp_file.is_file():
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parts = [ln.strip() for ln in cp_file.read_text().splitlines()
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if ln.strip()]
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parts += [str(mf / "client-named.jar"), str(mf / "classes")]
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classpath = os.pathsep.join(parts)
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if (mf / "natives").is_dir():
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os.environ.setdefault("MCFOLD_NATIVES_DIR", str(mf / "natives"))
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if instance is not None:
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root = getattr(instance, "content_root", None) or getattr(instance, "path", None)
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if root:
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root = Path(root)
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assets = str(root / "assets")
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idx = root / "assets" / "indexes"
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if idx.is_dir():
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names = sorted(p.stem for p in idx.glob("*.json"))
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asset_index = names[-1] if names else None
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game_dir = str(getattr(instance, "path", root) if root else "")
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if store:
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store_p = Path(store)
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assets = str(store_p / "assets")
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names = sorted(p.stem for p in (store_p / "assets" / "indexes").glob("*.json"))
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asset_index = names[-1] if names else None
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# ★ 不默认写生产实例 default（版本隔离策略）。
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# 实例目录与内容根**同级**（都挂在 mcview/ 下），
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# 绝不嵌套进内容根 —— 内容根要可只读共享（见 MULTI-INSTANCE-DESIGN §1.1）。
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# 缺省按内容根名派生一个独立实例，避免撞上任何真实实例。
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# 权威布局（mcview/lib/versions.cjs:25）：
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# BASE（可由 MCVIEW_BASE 覆盖）= .../mcview
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# contentRoot = BASE/store/<loader>-<version>
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# instanceDir = BASE/instances/<name>
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# 所以 store 参数若是内容根，则 BASE = 内容根的 parent.parent。
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base = Path(os.environ.get("MCVIEW_BASE") or store_p.parent.parent)
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game_dir = game_dir or str(base / "instances" / f"exp-{store_p.name}")
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# ★ Python 层 switch：按 client jar 的世代选后端
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# （1.21+ 的 DeltaTracker 在 1.20.x jar 中不存在 ⇒ 必须独立编译的后端）
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# ★ 变量名不能叫 cls —— 会覆盖 classmethod 的 cls，
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# 导致下面 cls(bridge, instance) 构造出后端而非 WorldRenderer（实测踩过）
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backend_cls = backend_class(client_jar=client_jar, generation=generation,
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launcher=launcher)
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bridge = backend_cls(
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java=java, classpath=classpath,
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game_dir=game_dir, assets=assets, asset_index=asset_index,
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mods_dir=mods_dir,
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)
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wr = cls(bridge, instance)
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if start:
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bridge.start()
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wr.refresh_capacity()
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return wr
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def refresh_capacity(self) -> dict[str, Any]:
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"""向 Java 后端询问世界尺寸（Python 不硬编码版本相关量）。"""
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try:
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self._capacity = self.bridge._request({"cmd": "capacity"})
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except Exception:
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self._capacity = None
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return self._capacity or {}
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@property
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def sections_count(self) -> int:
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if self._capacity and self._capacity.get("sectionsCount"):
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return int(self._capacity["sectionsCount"])
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return FALLBACK_SECTION_COUNT
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@property
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def min_section_y(self) -> int:
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if self._capacity and "minSection" in self._capacity:
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return int(self._capacity["minSection"])
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return FALLBACK_MIN_SECTION_Y
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@property
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def _default_biome(self) -> int:
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"""默认生物群系 id —— 运行时向 Java 查（不硬编码 1）。"""
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if self._biome_id is None:
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name = (self._capacity or {}).get("defaultBiome") or FALLBACK_DEFAULT_BIOME
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self._biome_id = self._resolve_biome_id(name)
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return self._biome_id
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def _resolve_biome_id(self, name: str) -> int:
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key = f"__biome__{name}"
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if key in self._spec_cache:
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return self._spec_cache[key]
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try:
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ids = self.bridge.resolve_blocks([name])
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bid = ids[0] if ids else 1
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except Exception:
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bid = 1
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self._spec_cache[key] = bid
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return bid
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def close(self) -> None:
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self.bridge.stop()
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def __enter__(self) -> "WorldRenderer":
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return self
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def __exit__(self, *exc) -> None:
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self.close()
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# ---------------- 方块名 → state id ----------------
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def get_block_info(self, x: int, y: int, z: int) -> dict:
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"""查询坐标处的方块信息（Java 侧回答，Python 只路由）。
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含：方块名（mod 方块亦然）、stateId、属性、光照/硬度、
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贴图缺失的程序化判据、是否来自 mod；未加载区块明确区分于空气。
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"""
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return self.bridge.get_block_info(x, y, z)
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def load_mods(self, mods_dir: str | Path | None = None) -> dict:
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"""加载 mod（Java 侧全权处理：扫 jar / 注册方块 / 挂资源包）。
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mods_dir 缺省取实例的 mods/ 目录。
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★ 为什么不需要 Fabric/Forge 加载器（见 scaffold/MOD-BLOCKS.md）：
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方块**渲染**只需要「注册表里有名字」+「资源包有模型/贴图」，
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与方块行为无关。所以零加载器也能让 mod 方块正确显示。
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代价（诚实标注）：方块行为（红石/交互）与第三方光影包（Iris）不支持。
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"""
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if mods_dir is None:
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inst_path = getattr(self.instance, "path", None) if self.instance else None
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if inst_path:
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mods_dir = Path(inst_path) / "mods"
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if mods_dir is None:
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return {"ok": False, "error": "未提供 mods_dir 且无法从实例推断"}
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d = Path(mods_dir)
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if not d.is_dir():
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return {"ok": True, "mods": 0, "note": f"{d} 不存在"}
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r = self.bridge.load_mods(str(d))
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# 加载 mod 后方块变了 ⇒ 规格缓存作废（否则仍按旧表解析）
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self._spec_cache.clear()
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self._biome_id = None
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self.refresh_capacity()
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return r
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def resolve_specs(self, specs: list[str]) -> dict[str, int]:
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"""批量把方块名规格解析成 state id（渲染器侧权威注册表）。"""
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todo = [s for s in dict.fromkeys(specs) if s not in self._spec_cache]
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if todo:
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resp = self.bridge._request({"cmd": "resolve", "blocks": todo}, timeout=120.0)
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ids = resp.get("ids", [])
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for spec, sid in zip(todo, ids):
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self._spec_cache[spec] = int(sid)
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return {s: self._spec_cache[s] for s in specs}
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# ---------------- 装载 ----------------
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def load_save(self, save_dir: str | Path, *, center: tuple[int, int] | None = None,
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radius: int | None = None, dim: str | None = None,
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only_status: str = "minecraft:full") -> dict:
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"""从存档装载区块（零网络、零登录）。
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radius —— 加载半径（区块）。**缺省跟随视距**（这是关键：
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视距设了 12 但只加载 3 圈数据，画面看起来就像视距没生效）。
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传 None 时用 renderDistance；显式传值则两者取大。
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"""
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if radius is None:
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radius = max(3, self.render_distance)
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else:
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radius = max(radius, 1)
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save_dir = Path(save_dir)
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level = anvil.read_level_dat(save_dir)
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data = level.get("Data", {})
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spawn = data.get("SpawnX"), data.get("SpawnY"), data.get("SpawnZ")
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if center is None:
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center = ((spawn[0] or 0) >> 4, (spawn[2] or 0) >> 4)
|
||
|
||
regs: dict[tuple[int, int], anvil.RegionFile] = {}
|
||
# ★ 先设视野中心：ClientChunkCache 只保留视野内的区块（实测否则注入被丢弃）
|
||
self.set_viewport(center[0], center[1], radius=radius + 2)
|
||
|
||
parsed: list[SaveChunk] = []
|
||
skipped = 0
|
||
for cx in range(center[0] - radius, center[0] + radius + 1):
|
||
for cz in range(center[1] - radius, center[1] + radius + 1):
|
||
rx, rz = cx >> 5, cz >> 5
|
||
key = (rx, rz)
|
||
if key not in regs:
|
||
p = anvil.region_path(save_dir, dim, rx, rz)
|
||
if not p.is_file():
|
||
skipped += 1; continue
|
||
regs[key] = anvil.RegionFile(p)
|
||
raw = regs[key].chunk_nbt(cx, cz)
|
||
if not raw:
|
||
skipped += 1; continue
|
||
nbt = anvil.nbt_read(raw)
|
||
if only_status and str(nbt.get("Status", "")) != only_status:
|
||
skipped += 1; continue
|
||
parsed.append(parse_save_chunk(cx, cz, nbt))
|
||
|
||
return self.load_chunks(parsed, meta={
|
||
"level_name": data.get("LevelName"),
|
||
"data_version": data.get("DataVersion"),
|
||
"spawn": spawn,
|
||
"center": center,
|
||
"skipped": skipped,
|
||
})
|
||
|
||
def load_chunks(self, chunks: list[SaveChunk], meta: dict | None = None) -> dict:
|
||
"""把存档区块交给渲染器。
|
||
|
||
★ Python 只做「方块名 → state id」的路由与 RLE 压缩；
|
||
调色板组装、位打包、协议序列化、入 cache 全在 Java 侧用官方 API 完成。
|
||
这样历代改过的协议格式不需要在 Python 里复制一份。
|
||
"""
|
||
all_specs: list[str] = []
|
||
for c in chunks:
|
||
all_specs.extend(c.palette_specs)
|
||
id_map = self.resolve_specs(all_specs)
|
||
unknown = sum(1 for v in id_map.values() if v < 0)
|
||
|
||
n_sections = self.sections_count
|
||
min_sy = self.min_section_y
|
||
injected = 0
|
||
for c in chunks:
|
||
sections: dict[int, list[int]] = {}
|
||
for idx in range(n_sections):
|
||
sec = c.sections.get(idx + min_sy)
|
||
if sec is None:
|
||
continue # 空 section 由 Java 侧留空
|
||
sections[idx] = [max(0, id_map.get(sp, -1)) for sp in sec["states"]]
|
||
if sections:
|
||
self.bridge.set_blocks(c.cx, c.cz, sections)
|
||
injected += 1
|
||
self.chunks[(c.cx, c.cz)] = c
|
||
|
||
self._loaded.update((c.cx, c.cz) for c in chunks)
|
||
out = {"injected": injected, "unknownBlocks": unknown,
|
||
"uniqueSpecs": len(id_map)}
|
||
if meta:
|
||
out.update(meta)
|
||
return out
|
||
|
||
# ---------------- 视角与截图 ----------------
|
||
|
||
@property
|
||
def render_distance(self) -> int:
|
||
"""当前视距（区块）。默认 8，可用 set_view(render_distance=) 改。"""
|
||
return getattr(self, "_render_distance", 8)
|
||
|
||
def set_render_distance(self, rd: int) -> dict:
|
||
"""设置视距（区块）。内部同时设 options + serverRenderDistance +
|
||
ClientChunkCache 的 storage 半径 —— 三者缺一则视距不生效（实测）。"""
|
||
self._render_distance = int(rd)
|
||
return self.bridge.set_view(render_distance=int(rd))
|
||
|
||
def set_viewport(self, cx: int, cz: int, radius: int | None = None) -> dict:
|
||
"""设定视野中心 —— 必须在注入前设好，否则区块会被 ClientChunkCache 丢弃。"""
|
||
req: dict[str, Any] = {"cmd": "viewport", "cx": cx, "cz": cz}
|
||
if radius is not None:
|
||
req["radius"] = radius
|
||
return self.bridge._request(req)
|
||
|
||
def set_view(self, **kw) -> dict:
|
||
"""视觉设置（camera_type / render_distance / fov / hide_gui / …）。
|
||
|
||
★ 这个方法原先**缺失**，而桥层（`RenderBackend.set_view`）早就实现了
|
||
完整的 `view` 命令（含 `hide_gui` → 官方 `options.hideGui`）。
|
||
结果 M8 里我调 `renderer.set_view(hide_gui=True)` 时
|
||
撞上 AttributeError，又被 `except: pass` 静默吞掉
|
||
⇒ **出图带着 HUD**，而返回值里还写着 `hide_gui: True`（自相矛盾）。
|
||
|
||
⇒ 两个教训：
|
||
1. 桥层有能力 ≠ 上层有入口（中间这层要一起补）；
|
||
2. `except: pass` 掩盖了真实错误 —— 修 HUD 时必须让它**显式失败**，
|
||
否则「以为设了」与「实际没设」无法区分。
|
||
"""
|
||
return self.bridge.set_view(**kw)
|
||
|
||
def debug(self) -> dict:
|
||
"""诊断：玩家坐标/区块/网格编译/视野中心的实际状态。"""
|
||
return self.bridge._request({"cmd": "debug"})
|
||
|
||
def camera(self, x: float, y: float, z: float,
|
||
yaw: float = 0.0, pitch: float = 0.0) -> None:
|
||
self.bridge.set_camera(x, y, z, yaw, pitch)
|
||
|
||
def camera_above(self, cx: float = 0.0, cz: float = 0.0, height: float = 90.0,
|
||
yaw: float = 0.0, pitch: float = 70.0) -> None:
|
||
"""俯视整片区域（默认视角）。"""
|
||
self.bridge.set_camera(cx, height, cz, yaw, pitch)
|
||
|
||
def screenshot(self, out: str | None = None, frames: int = 60) -> RenderResult:
|
||
return self.bridge.render(out=out, frames=frames)
|