"""Extract the level's 2D colliders — the ones a Rigidbody2D player actually hits. For a game whose player is a Rigidbody2D with BoxCollider2D/CircleCollider2D (check the player prefab), and Unity's 2D physics only ever collides 2D colliders with 2D colliders. The 3D MeshColliders on the art are for the land-check SphereCast and shadows; nothing a ship can collide with lives there. So the playable walls are the small, designer-authored set of BoxCollider2D / CircleCollider2D components on the level prefabs — no depth, no slicing, no guessing. Reuses unity_extract's transform composition (nested prefabs, overrides, layer overrides). """ import json, os, re, sys sys.path.insert(0, os.path.dirname(os.path.abspath(__file__))) import unity_extract as ue SOLID_LAYERS = {0, 10} # Physics2D matrix: Players collide with Default and Terrain; not Shadows(18) out = [] def vec2(body, key, default): m = re.search(re.escape(key) + r': \{x: ([-\d.eE+]+), y: ([-\d.eE+]+)\}', body) return (float(m.group(1)), float(m.group(2))) if m else default def walk(path, docs, tid, world, depth, mods, tag): if depth > ue.MAX_DEPTH: return cls, body = docs[tid] if cls == '1001': prefab(path, docs, tid, body, world, depth, tag, mods); return if 'm_LocalPosition' not in body: return trs = ue.local_trs(body); mod = mods.get(tid) if mod: trs = ue.apply_mods(trs, mod) w = ue.compose(world, trs) goid = ue.fid(body, 'm_GameObject') if not ue.go_active(docs, goid, mods): return name = ue.go_name(docs, goid); layer = ue.go_layer(docs, goid, mods) gd = docs.get(goid) if gd: (p, q, s) = w zrot = ue.quat_euler_z(q) for m in re.finditer(r'- component: \{fileID: (\d+)\}', gd[1]): cd = docs.get(m.group(1)) if not cd or cd[0] not in ('61', '58'): continue cb = cd[1] if not ue.comp_enabled(cb, m.group(1), mods): continue trig = re.search(r'm_IsTrigger: (\d)', cb); trig = bool(trig and trig.group(1) == '1') off = vec2(cb, 'm_Offset', (0.0, 0.0)) wo = ue.qrot(q, (off[0] * s[0], off[1] * s[1], 0.0)) cx, cy = p[0] + wo[0], p[1] + wo[1] rec = dict(name=name, tag=tag or 'scene', layer=layer, trigger=trig, cx=round(cx, 4), cy=round(cy, 4), z=round(p[2], 3)) if cd[0] == '61': size = vec2(cb, 'm_Size', (1.0, 1.0)) rec.update(kind='box', hw=round(abs(size[0] * s[0]) / 2, 4), hh=round(abs(size[1] * s[1]) / 2, 4), rot=round(zrot, 3)) else: r = re.search(r'm_Radius: ([-\d.eE+]+)', cb) rec.update(kind='circle', r=round(float(r.group(1)) * max(abs(s[0]), abs(s[1])), 4) if r else 0.5) out.append(rec) seg = body[body.find('m_Children:'):body.find('m_Father:')] if 'm_Children:' in body and 'm_Father:' in body else '' for m in re.finditer(r'- \{fileID: (\d+)\}', seg): if m.group(1) in docs: walk(path, docs, m.group(1), w, depth + 1, mods, tag) def prefab(path, docs, tid, body, world, depth, tag, outer_mods=None): m = re.search(r'm_SourcePrefab: \{fileID: \d+, guid: ([0-9a-f]{32})', body) src = ue.guid2path.get(m.group(1)) if m else None if not src or not os.path.exists(src): return pdocs = ue.parse_file(src) modmap = ue.instance_mods(body, docs, tid, pdocs, outer_mods) root = next((pid for pid, (c, b) in pdocs.items() if c == '4' and ue.fid(b, 'm_Father') == '0'), None) if root is not None and not ue.go_active(pdocs, ue.fid(pdocs[root][1], 'm_GameObject'), modmap): return # the instance switches the whole prefab off (a scene-level m_IsActive override) name = os.path.basename(src).replace('.prefab', '') if depth == 0: # scene-level instance: honour level patches (its own placement is the root override) root = next((pid for pid, (c, b) in pdocs.items() if c == '4' and ue.fid(b, 'm_Father') == '0'), None) rp = ue.apply_mods(ue.local_trs(pdocs[root][1]), modmap.get(root, {})) if root else None wp = ue.compose(world, rp)[0] if rp else world[0] if ue.patch_skips_instance(name, wp): return expand(src, pdocs, world, depth + 1, modmap, tag or name) def expand(path, docs, world, depth, mods, tag): if depth > ue.MAX_DEPTH: return for tid, (cls, body) in docs.items(): if cls == '4' and ue.fid(body, 'm_Father') == '0' and 'm_LocalPosition' in body: walk(path, docs, tid, world, depth, mods, tag) for tid, (cls, body) in docs.items(): if cls != '1001': continue chain = []; cur = ue.fid(body, 'm_TransformParent'); guard = 0 while cur != '0' and cur in docs and guard < 40: ccls, cbody = docs[cur] if ccls != '4' or 'm_LocalPosition' not in cbody: break chain.append((cur, cbody)); cur = ue.fid(cbody, 'm_Father'); guard += 1 w = world for cid, cbody in reversed(chain): trs = ue.local_trs(cbody); mm = mods.get(cid) if mm: trs = ue.apply_mods(trs, mm) w = ue.compose(w, trs) prefab(path, docs, tid, body, w, depth, tag, mods) def add_patched_instances(scene_docs): """Place the extra instances a level patch adds, using the scene's own copy of that prefab.""" for tid, (cls, body) in scene_docs.items(): if cls != '1001': continue m = re.search(r'm_SourcePrefab: \{fileID: \d+, guid: ([0-9a-f]{32})', body) src = ue.guid2path.get(m.group(1)) if m else None if not src: continue name = os.path.basename(src).replace('.prefab', '') adds = ue.patch_added_instances(name) if not adds: continue pdocs = ue.parse_file(src) root = next((pid for pid, (c, b) in pdocs.items() if c == '4' and ue.fid(b, 'm_Father') == '0'), None) if root is None: continue for (pos, quat) in adds: # the added instance's root gets the patched placement instead of the scene's override modmap = {root: {'m_LocalPosition.x': pos[0], 'm_LocalPosition.y': pos[1], 'm_LocalPosition.z': pos[2], 'm_LocalRotation.x': quat[0], 'm_LocalRotation.y': quat[1], 'm_LocalRotation.z': quat[2], 'm_LocalRotation.w': quat[3]}} expand(src, pdocs, ((0.0, 0.0, 0.75), (0.0, 0.0, 0.0, 1.0), (1.0, 1.0, 1.0)), 1, modmap, name + ' (patch)') break # one source prefab is enough if __name__ == '__main__': scene = sys.argv[1] if len(sys.argv) > 1 else ue.scene_path_from_config() docs = ue.parse_file(scene) expand(scene, docs, ((0.0, 0.0, 0.0), (0.0, 0.0, 0.0, 1.0), (1.0, 1.0, 1.0)), 0, {}, None) add_patched_instances(docs) # dedupe identical records reached by two paths seen = set(); uniq = [] for r in out: k = json.dumps({k: v for k, v in r.items() if k not in ('name',)}, sort_keys=True) if k in seen: continue seen.add(k); uniq.append(r) print(json.dumps(uniq))