Complete Cocos Creator port with level bundles, themes, and tooling.

Adds level prefabs, theme assets, audio, extensions, and deployment scripts for the Unity WebGL migration.

Co-authored-by: Cursor <cursoragent@cursor.com>

tools/build_theme_tile_meta.py

@@ -0,0 +1,165 @@
+#!/usr/bin/env python3
+"""从 Cocos 贴图 + Unity pivot 生成 tile-display-meta.json（裁剪后可见尺寸）。"""
+from __future__ import annotations
+
+import json
+import re
+import struct
+from pathlib import Path
+
+UNITY_THEMES = {
+    "silu": "silu",
+    "snow": "snow",
+    "sanxing": "sanxing",
+    "chinese": "Chinese",
+    "numMan": "numMan",
+    "redarmy": "redArmy",
+    "default": "Level",
+}
+
+TILE_NAMES = [
+    "Baseblock",
+    "JumpBlock",
+    "WallBlock",
+    "kuai11",
+    "Decor23",
+    "素材切图-23",
+    "素材切图2-23",
+    "小游戏素材红色_03",
+]
+
+
+def png_size(path: Path) -> tuple[int, int]:
+    with path.open("rb") as f:
+        f.read(16)
+        return struct.unpack(">II", f.read(8))
+
+
+def alpha_bbox(png_path: Path) -> tuple[int, int, int, int] | None:
+    try:
+        from PIL import Image
+    except ImportError:
+        return None
+    try:
+        img = Image.open(png_path).convert("RGBA")
+        return img.getbbox()
+    except Exception:
+        return None
+
+
+def read_unity_sprite_meta(meta_path: Path) -> dict | None:
+    if not meta_path.is_file():
+        return None
+    text = meta_path.read_text(encoding="utf-8")
+    pivot = re.search(r"spritePivot:\s*\{x:\s*([^,]+),\s*y:\s*([^}]+)\}", text)
+    ppu = re.search(r"spritePixelsToUnits:\s*(\d+(?:\.\d+)?)", text)
+    if not pivot:
+        return None
+    return {
+        "pivotX": float(pivot.group(1)),
+        "pivotY": float(pivot.group(2)),
+        "ppu": float(ppu.group(1)) if ppu else 100.0,
+    }
+
+
+def resolve_draw_rect(
+    png_path: Path,
+    full_w: int,
+    full_h: int,
+    pivot_x: float,
+    pivot_y: float,
+    tile_name: str,
+) -> dict:
+    bbox = alpha_bbox(png_path)
+    if not bbox:
+        return {
+            "width": full_w,
+            "height": full_h,
+            "pivotX": pivot_x,
+            "pivotY": pivot_y,
+            "fitMul": 1.0,
+        }
+    left, top, right, bottom = bbox
+    tw, th = right - left, bottom - top
+    if tw <= 0 or th <= 0 or (tw >= full_w and th >= full_h):
+        return {
+            "width": full_w,
+            "height": full_h,
+            "pivotX": pivot_x,
+            "pivotY": pivot_y,
+            "fitMul": 1.0,
+        }
+
+    pivot_bottom = pivot_y * full_h
+    trim_bottom = full_h - bottom
+    pivot_bottom_trim = pivot_bottom - trim_bottom
+    meta_pivot_y = max(0.0, min(1.0, pivot_bottom_trim / th))
+    meta_pivot_x = max(0.0, min(1.0, (pivot_x * full_w - left) / tw))
+
+    fit_mul = 1.0
+    out_pivot_y = meta_pivot_y
+    # kuai11 篝火：底座贴齐地面格，略放大消除缝隙
+    if tile_name == "kuai11":
+        fit_mul = 1.12
+        # 底座在裁剪图底部，pivot 放低使底座对齐格子
+        out_pivot_y = max(0.28, min(0.42, meta_pivot_y * 0.45))
+
+    return {
+        "width": tw,
+        "height": th,
+        "pivotX": round(meta_pivot_x, 4),
+        "pivotY": round(out_pivot_y, 4),
+        "fitMul": fit_mul,
+    }
+
+
+def build_theme(cocos_tex: Path, unity_tex: Path, unity_folder: str, cocos_key: str) -> dict:
+    theme_dir = unity_tex if unity_folder == "Level" else unity_tex / unity_folder
+    cocos_dir = cocos_tex if cocos_key == "default" else cocos_tex / cocos_key
+    tiles: dict[str, dict] = {}
+    for name in TILE_NAMES:
+        png = cocos_dir / f"{name}.png"
+        if not png.is_file():
+            if name == "Decor23":
+                png = cocos_dir / "素材切图-23.png"
+            elif name == "素材切图-23":
+                png = cocos_dir / "Decor23.png"
+        if not png.is_file():
+            continue
+        unity_png = theme_dir / png.name
+        meta = read_unity_sprite_meta(unity_png.with_suffix(".png.meta"))
+        if not meta:
+            continue
+        w, h = png_size(png)
+        draw = resolve_draw_rect(png, w, h, meta["pivotX"], meta["pivotY"], name)
+        tiles[name] = {**draw, "ppu": meta["ppu"]}
+    return tiles
+
+
+def main():
+    import argparse
+
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--unity-root", required=True)
+    ap.add_argument("--out", default="assets/resources/theme/tile-display-meta.json")
+    args = ap.parse_args()
+
+    project = Path(__file__).resolve().parent.parent
+    unity_tex = Path(args.unity_root) / "Assets" / "Texture"
+    cocos_tex = project / "assets/resources/textures"
+    themes: dict[str, dict] = {}
+    for cocos_key, unity_folder in UNITY_THEMES.items():
+        tiles = build_theme(cocos_tex, unity_tex, unity_folder, cocos_key)
+        if tiles:
+            themes[cocos_key] = tiles
+            print(f"  {cocos_key}: {len(tiles)} tiles")
+
+    out = project / args.out
+    out.parent.mkdir(parents=True, exist_ok=True)
+    payload = {"version": 1, "themes": themes}
+    out.write_text(json.dumps(payload, indent=2, ensure_ascii=False), encoding="utf-8")
+    print(f"Wrote -> {out}")
+
+
+if __name__ == "__main__":
+    main()