diff --git a/src/utils/html_generator.py b/src/utils/html_generator.py
index eeb4745..c6a10c9 100644
--- a/src/utils/html_generator.py
+++ b/src/utils/html_generator.py
@@ -210,6 +210,11 @@ class HTMLGenerator:
         const axesHelper = new THREE.AxesHelper(50);
         scene.add(axesHelper);
         
+        // 添加轨道控制器 - 必须在使用之前定义
+        const controls = new THREE.OrbitControls(camera, renderer.domElement);
+        controls.enableDamping = true;
+        controls.dampingFactor = 0.25;
+        
         // 创建几何体（使用点云数据或模拟模具形状）
         const geometryData = {json.dumps(geometry_data, indent=2)};
         const cavityData = {json.dumps(cavity_data, indent=2) if cavity_data else 'null'};
@@ -238,9 +243,9 @@ class HTMLGenerator:
                 // 创建点云材质
                 const pointMaterial = new THREE.PointsMaterial({{
                     color: 0x4CAF50,
-                    size: 0.5,
+                    size: 1.0,
                     transparent: true,
-                    opacity: 0.8
+                    opacity: 0.9
                 }});
                 
                 pointcloudMesh = new THREE.Points(pointGeometry, pointMaterial);
@@ -251,6 +256,12 @@ class HTMLGenerator:
                 pointGeometry.computeBoundingBox();
                 pointGeometry.boundingBox.getCenter(center);
                 controls.target.set(center.x, center.y, center.z);
+                
+                // 根据边界框大小调整相机距离
+                const boundingSphere = new THREE.Sphere();
+                pointGeometry.boundingBox.getBoundingSphere(boundingSphere);
+                const cameraDistance = boundingSphere.radius * 3;
+                camera.position.set(cameraDistance, cameraDistance, cameraDistance);
             }} else {{
                 // 创建产品几何体（半透明绿色）
                 const productGeometry = new THREE.BoxGeometry(width * 0.9, height * 0.9, depth * 0.9);
@@ -338,11 +349,6 @@ class HTMLGenerator:
         camera.position.set(200, 200, 200);
         camera.lookAt(0, 0, 0);
         
-        // 添加轨道控制器
-        const controls = new THREE.OrbitControls(camera, renderer.domElement);
-        controls.enableDamping = true;
-        controls.dampingFactor = 0.25;
-        
         // 动画循环
         function animate() {{
             requestAnimationFrame(animate);