fix: color_xrange 范围限定 d_max + color_driver + color 范围改为 [0,1] + bug 修复

dynamics.py

@@ -187,12 +187,11 @@ def run_case(config_path, runtime_base, input_dir="input", output_dir="output",
         disp_path = os.path.join(output_dir_abs, "display.txt")
 
         # ── 自动缓存检测 ───────────────────────────────────────
-        # force_calc=1: 强制重新计算，忽略缓存
-        # force_calc=0: 尊重 step_simulate 设置，不自动覆盖
+        # force_calc=1: 强制重新计算，忽略缓存（仅在 step_simulate=1 时生效）
+        # force_calc=0: 尊重 step_simulate 设置
         force_calc = int(config.get("force_calc", 0))
-        if force_calc:
+        if force_calc and config.get("step_simulate", 1):
             print(f"[run] force_calc=1，跳过缓存，强制重新计算")
-            config["step_simulate"] = 1
             config["step_sample"] = 1
         elif config.get("step_simulate", 1):
             # step_simulate=1 且 force_calc=0 → 按用户要求执行计算
@@ -225,12 +224,12 @@ def run_case(config_path, runtime_base, input_dir="input", output_dir="output",
                 print(f"[run] 没有可用的缓存输出，但 step_simulate=0，将跳过模拟")
 
         # 2. 运行物理模拟 → output/trajectory.txt
+        _engine_aliases = {"c++": "cpp", "f90": "fortran", "f": "fortran"}
+        engine = _engine_aliases.get(
+            str(config.get("engine", "python")).lower(),
+            str(config.get("engine", "python")).lower()
+        )
         if config.get("step_simulate", 1):
-            _engine_aliases = {"c++": "cpp", "f90": "fortran", "f": "fortran"}
-            engine = _engine_aliases.get(
-                str(config.get("engine", "python")).lower(),
-                str(config.get("engine", "python")).lower()
-            )
             total_steps = config["NT"]
             record_steps = total_steps - (config.get("warmup_steps") or 0)
             print(f"[run] 开始计算  总步数={total_steps}  记录步数={record_steps}  DT={config['DT']}")