diff --git a/algoim/organizer/loader.hpp b/algoim/organizer/loader.hpp
index 2ed9f89..be67ade 100644
--- a/algoim/organizer/loader.hpp
+++ b/algoim/organizer/loader.hpp
@@ -207,21 +207,21 @@ public:
         tree.structure.push_back(blob0);
 
         algoim::organizer::Blob blob1;
-        blob0.isPrimitive = 1;
-        blob0.nodeOp = 0;
-        blob0.inOut = 0;
-        blob0.oneChildInOut = 0;
-        blob0.isLeft = 0;
-        blob0.ancestor = 0;
+        blob1.isPrimitive = 1;
+        blob1.nodeOp = 0;
+        blob1.inOut = 0;
+        blob1.oneChildInOut = 0;
+        blob1.isLeft = 0;
+        blob1.ancestor = 0;
         tree.structure.push_back(blob1);
 
         algoim::organizer::Blob blob2;
-        blob0.isPrimitive = 0;
-        blob0.nodeOp = 3; // no set
-        blob0.inOut = 0;
-        blob0.oneChildInOut = 0;
-        blob0.isLeft = 0;
-        blob0.ancestor = 0;
+        blob2.isPrimitive = 0;
+        blob2.nodeOp = 3; // no set
+        blob2.inOut = 0;
+        blob2.oneChildInOut = 0;
+        blob2.isLeft = 0;
+        blob2.ancestor = 0;
         tree.structure.push_back(blob2);
 
         tree.primitiveNodeIdx.push_back(0);
@@ -540,7 +540,7 @@ public:
         result.tensors[0] = cylinder.tensors[0];
         result.aabb = cylinder.aabb;
         result.subBlobTree.primitiveNodeIdx.push_back(0);
-        result.subBlobTree.structure.push_back(algoim::organizer::Blob{1, 2, 0, 0, 0, 0});
+        result.subBlobTree.structure.push_back(algoim::organizer::Blob{1, 0, 0, 0, 0, 0});
 
         return result;
     }
@@ -665,8 +665,8 @@ public:
 
         auto halfPlane1 = createHalfPlane(points[0], -normal);
         auto halfPlane2 = createHalfPlane(points[0] + extusion, normal);
-        result = this->unionNode(result, halfPlane1);
-        result = this->unionNode(result, halfPlane2);
+        result = this->intersectNode(result, halfPlane1);
+        result = this->intersectNode(result, halfPlane2);
 
         this->m_allVisible.push_back(result);
         return this->m_allVisible.size() - 1;
@@ -719,36 +719,38 @@ public:
             double sinHalfTheta = 2 * bulge / (1 + bulge * bulge);
             double radius = halfDistance / sinHalfTheta;
             double scalar = std::sqrt(radius * radius - halfDistance * halfDistance);
-            auto origion = middlePoint + middleToOrigion * scalar;
 
             /* Determine whether to merge or subtract */
             /* The operation is merge if flag is true, otherwise it is subtract */
             bool flag;
+            /*  */
             auto centroidPoint = computePolygonCentroid(points);
             auto middleToCentroid = Direction3D(centroidPoint - middlePoint);
+            /* out */
             if (middleToCentroid.dot(middleToOrigion) > 0.0)
             {
-                if (bulge > 0.0)
-                {
-                    flag = true;
-                }
-                else
+                /* |bulge| > 1 */
+                if (std::abs(bulge) > 1.0 + 1e-8)
                 {
-                    flag = false;
+                    scalar *= -1;
                 }
+
+                flag = true;
             }
+            /* in */
             else
             {
-                if (bulge > 0.0)
-                {
-                    flag = false;
-                }
-                else
+                /* |bulge| > 1 */
+                if (std::abs(bulge) > 1.0 + 1e-8)
                 {
-                    flag = true;
+                    scalar *= -1;
                 }
+
+                flag = false;
             }
 
+            Point3D origion = middlePoint + middleToOrigion * scalar;
+
             /* Determine which axis is aligned */
             int alignAxis;
             if (normal.isParallel(Direction3D(1, 0, 0)))
@@ -792,13 +794,13 @@ public:
 
         auto halfPlane1 = createHalfPlane(points[0], -normal);
         auto halfPlane2 = createHalfPlane(points[0] + extusion, normal);
-        base = this->unionNode(base, halfPlane1);
-        base = this->unionNode(base, halfPlane2);
+        base = this->intersectNode(base, halfPlane1);
+        base = this->intersectNode(base, halfPlane2);
 
-		for (size_t i = 0; i < base.aabbs.size(); i++)
-		{
+        for (size_t i = 0; i < base.aabbs.size(); i++)
+        {
             base.aabbs[i] = base.aabb;
-		}
+        }
 
         this->m_allVisible.push_back(base);
 
diff --git a/examples/example_loader.cpp b/examples/example_loader.cpp
index 1c0ffe7..2d07889 100644
--- a/examples/example_loader.cpp
+++ b/examples/example_loader.cpp
@@ -24,6 +24,8 @@ void loaderTest1()
     extusion = Vector3D{0.0000000000000000, 0.0000000000000000, 3300.0000000000000};
     auto tag1 = loader.addExtrude(points, bulges, extusion);
 
+	loader.getAreaAndVolume(tag1);
+
     /* 体2 */
     points.clear();
     bulges.clear();
@@ -38,6 +40,8 @@ void loaderTest1()
     extusion = Vector3D{0.0000000000000000, 0.0000000000000000, 3300.0000000000000};
     auto tag2 = loader.addExtrude(points, bulges, extusion);
 
+	loader.getAreaAndVolume(tag2);
+
     /* 体3 */
     points.clear();
     bulges.clear();
@@ -52,6 +56,8 @@ void loaderTest1()
     extusion = Vector3D{0.0000000000000000, 0.0000000000000000, 3300.0000000000000};
     auto tag3 = loader.addExtrude(points, bulges, extusion);
 
+	loader.getAreaAndVolume(tag3);
+
     /* 体4 */
     topPoint = Point3D{-1.1224183253943920e-06, -3.8391322798592142e-07, 0.0000000000000000};
     bottomPoint = Point3D{-1.1224183253943920e-06, -3.8391322798592142e-07, 3300.0000000000000000};
@@ -59,14 +65,20 @@ void loaderTest1()
     radius2 = 33539.000000000000;
     auto tag4 = loader.addCone(topPoint, bottomPoint, radius1, radius2);
 
+	loader.getAreaAndVolume(tag4);
+
     /* 体3被切割 */
     basePoint = Point3D{-1.1224183253943920e-06, -3.8391322798592142e-07, 0.0000000000000000};
     direction = Direction3D{0, 0, 1};
     loader.split(tag3, basePoint, direction);
 
+	loader.getAreaAndVolume(tag3);
+
     /* 体3和体4布尔差 */
     loader.differentNode(tag3, tag4);
 
+	loader.getAreaAndVolume(tag3);
+
     /* 体5 */
     points.clear();
     bulges.clear();
@@ -277,7 +289,7 @@ void loaderTest1()
     extusion = Vector3D{0.0000000000000000, 0.0000000000000000, 600.0000000000000};
     auto tag13 = loader.addExtrude(points, bulges, extusion);
 
-    /* 体13 */
+    /* 体14 */
     points.clear();
     bulges.clear();
     points.push_back(Point3D{-673.66711640879771, 5999.2409883221790, 0.0000000000000000});