diff --git a/src/api/routes.py b/src/api/routes.py
index 5a212a2..50f36fb 100644
--- a/src/api/routes.py
+++ b/src/api/routes.py
@@ -468,14 +468,16 @@ async def process_file_core(
         try:
             mesh_result = mesh_generator.generate_mesh_from_shape(shape)
 
-            tri_mesh = mesh_result.get("trimesh_mesh")
-            pointcloud = mesh_result.get("pointcloud") or {}
-
-            if tri_mesh is not None:
-                # 顶点和面转为 JSON 可序列化
-                vertices = tri_mesh.vertices.tolist()
-                faces = tri_mesh.faces.tolist()
+            # mesh_generator 返回: vertices, faces, points, normals, point_count, vertex_count, face_count
+            vertices = mesh_result.get("vertices", [])
+            faces = mesh_result.get("faces", [])
+            points = mesh_result.get("points", [])
+            normals = mesh_result.get("normals", [])
+            point_count = mesh_result.get("point_count", 0)
+            vertex_count = mesh_result.get("vertex_count", 0)
+            face_count = mesh_result.get("face_count", 0)
 
+            if vertices and faces:
                 # 使用已计算的几何边界框，避免重复计算
                 bbox = geometry_data.get("bounding_box", {})
 
@@ -484,15 +486,19 @@ async def process_file_core(
                         "file_name": Path(file_path).name,
                         "generated_at": datetime.now().isoformat(),
                         "quality": "medium",
-                        "vertex_count": len(vertices),
-                        "face_count": len(faces),
-                        "point_count": pointcloud.get("count"),
+                        "vertex_count": vertex_count,
+                        "face_count": face_count,
+                        "point_count": point_count,
                     },
                     "mesh": {
                         "vertices": vertices,
                         "faces": faces,
                     },
-                    "pointcloud": pointcloud,
+                    "pointcloud": {
+                        "points": points,
+                        "normals": normals,
+                        "count": point_count
+                    },
                     "bounding_box": bbox,
                 }
 
@@ -504,9 +510,9 @@ async def process_file_core(
                 )
                 # 将简要网格摘要写入内存任务，便于前端展示汇总信息
                 tasks[task_id]["mesh_summary"] = {
-                    "vertex_count": len(vertices),
-                    "face_count": len(faces),
-                    "point_count": pointcloud.get("count"),
+                    "vertex_count": vertex_count,
+                    "face_count": face_count,
+                    "point_count": point_count,
                     "quality": "medium",
                 }
         except Exception as mesh_err:
@@ -653,8 +659,14 @@ async def process_file_core(
             db_session, task_id, "processing", 85, "生成可视化报告"
         )
 
-        # 获取点云数据
-        pointcloud_data = mesh_result.get("pointcloud", {}) if mesh_result else {}
+        # 获取点云数据 - mesh_result 直接返回 points 和 normals
+        pointcloud_data = None
+        if mesh_result:
+            pointcloud_data = {
+                "points": mesh_result.get("points", []),
+                "normals": mesh_result.get("normals", []),
+                "point_count": mesh_result.get("point_count", 0)
+            }
 
         html_file_path = html_generator.generate_and_save_visualization(
             geometry_data,
diff --git a/src/core/mesh_generator.py b/src/core/mesh_generator.py
index b1b68d9..f2f6b86 100644
--- a/src/core/mesh_generator.py
+++ b/src/core/mesh_generator.py
@@ -3,6 +3,7 @@ import logging
 import numpy as np
 from typing import Dict, List, Optional, Any
 import trimesh
+from trimesh import sample as trimesh_sample
 from OCC.Core.BRepMesh import BRepMesh_IncrementalMesh
 from OCC.Core.TopExp import TopExp_Explorer
 from OCC.Core.TopAbs import TopAbs_FACE
@@ -23,7 +24,7 @@ class MeshGenerator:
         }
         self.quality = self.quality_settings.get(quality, 0.3)
 
-    def generate_mesh_from_shape(self, shape, num_points: int = 50000) -> Dict:
+    def generate_mesh_from_shape(self, shape, num_points: int = 20000) -> Dict:
         """从PythonOCC形状生成点云数据"""
         try:
             # 生成网格 - 使用更精细的网格
@@ -68,7 +69,7 @@ class MeshGenerator:
                     pnt = face_triangulation.Node(i)
                     # 应用位置变换
                     pnt.Transform(trsf)
-                    face_vertices.append([pnt.X(), pnt.Y(), pnt.Z()])
+                    face_vertices.append([float(pnt.X()), float(pnt.Y()), float(pnt.Z())])
                 
                 # 提取三角形索引
                 face_indices = []
@@ -103,8 +104,12 @@ class MeshGenerator:
             # 创建Trimesh对象
             tri_mesh = trimesh.Trimesh(vertices=vertices, faces=faces, process=True)
             
+            # 根据网格大小动态调整采样点数
+            actual_num_points = min(num_points, len(faces) * 2)
+            logger.info(f"采样点数: {actual_num_points}")
+            
             # 在网格表面采样点云
-            points, face_idx = trimesh.sample.sample_surface(tri_mesh, num_points)
+            points, face_idx = trimesh.sample.sample_surface(tri_mesh, actual_num_points)
             
             # 获取法向量
             normals = tri_mesh.face_normals[face_idx]
@@ -116,9 +121,9 @@ class MeshGenerator:
                 "faces": faces.tolist(),
                 "points": points.tolist(),
                 "normals": normals.tolist(),
-                "point_count": len(points),
-                "vertex_count": len(vertices),
-                "face_count": len(faces)
+                "point_count": int(len(points)),
+                "vertex_count": int(len(vertices)),
+                "face_count": int(len(faces))
             }
             
         except Exception as e: