feat: 运动相机支持 + move_camera.txt 关键帧驱动

input.txt 新增：
  move_camera: 0  # 0=固定视角, 1=按 move_camera.txt 运动

move_camera.txt 格式（4列：帧号 距离 俯仰角 方位角）：
  0    40.0   0     0
  100  80.0  -30  180
  200  40.0   0   360

display.txt header 传递 camera_keyframes JSON 数组，
draw.py 按帧时间线性插值驱动相机运动（循环播放）。

compute.py

@@ -65,6 +65,7 @@ box_color_r = None
 box_color_g = None
 box_color_b = None
 use_marker = 0
+camera_keyframes_raw = ""
 
 # 力开关
 GRAVITY_FIELD = 1         # 均匀重力场
@@ -86,6 +87,27 @@ Z_MIN = None
 Z_MAX = None
 
 
+def _load_camera_keyframes(path):
+    """读取 move_camera.txt，返回 JSON 数组字符串 [[frame,dist,el,az],...] 或空串。"""
+    if not os.path.exists(path):
+        print(f"[compute] 警告: 未找到 {path}，跳过运动相机")
+        return ""
+    keyframes = []
+    with open(path, "r", encoding="utf-8") as f:
+        for line in f:
+            line = line.strip()
+            if not line or line.startswith("#"):
+                continue
+            parts = line.split()
+            if len(parts) >= 4:
+                keyframes.append([int(parts[0]), float(parts[1]),
+                                   float(parts[2]), float(parts[3])])
+    if not keyframes:
+        return ""
+    import json
+    return json.dumps(keyframes)
+
+
 def _to_text_value(value):
     """Convert numpy-heavy objects into JSON-friendly plain Python values."""
     if isinstance(value, np.ndarray):
@@ -642,7 +664,7 @@ def run_from_config(config, out_dir=None):
     global X_MIN, X_MAX, Y_MIN, Y_MAX, Z_MIN, Z_MAX
     global ball_radius, ball_color_r, ball_color_g, ball_color_b
     global box_color_r, box_color_g, box_color_b
-    global use_marker
+    global use_marker, camera_keyframes_raw
     global warmup_steps, sample_start, sample_end
     global GRAVITY_FIELD, GRAVITY_INTERACTION, ELASTIC_FORCE, DAMPING_FORCE, GRAVITY_STRENGTH
     global DRIVING_FORCE, DRIVER_DATA
@@ -726,6 +748,17 @@ def run_from_config(config, out_dir=None):
             driver_path = os.path.join(out_dir, driver_rel)
         DRIVER_DATA = load_driver_file(driver_path, ATOM_IDS)
 
+    # 加载运动相机关键帧
+    camera_keyframes_raw = ""
+    move_camera = int(config.get("move_camera", 0))
+    camera_keyframes_raw = ""
+    if move_camera:
+        cam_rel = str(config.get("move_camera_file", os.path.join("input", "move_camera.txt")))
+        cam_path = cam_rel
+        if out_dir is not None and not os.path.isabs(cam_rel):
+            cam_path = os.path.join(out_dir, cam_rel)
+        camera_keyframes_raw = _load_camera_keyframes(cam_path)
+
     print(f"[compute] 使用算法: {METHOD}")
     print(f"[compute] 已加载成键信息: {len(BOND_PAIRS)} 条键")
     if config.get("_skip_run", False):
@@ -1464,7 +1497,8 @@ def run_simulation(save_trajectory=0):
                        "atom_radii": ",".join(str(r) for r in ATOM_RADII),
                        "camera_distance": str(config.get("camera_distance", 40.0)),
                        "camera_elevation": str(config.get("camera_elevation", 0)),
-                       "camera_azimuth": str(config.get("camera_azimuth", 0))}
+                       "camera_azimuth": str(config.get("camera_azimuth", 0)),
+                       "camera_keyframes": str(camera_keyframes_raw)}
     )
     print(f"[compute] display.txt 已保存至: {disp_path} ({n_frames_actual} 帧)")