diff --git a/apps/gpu/RotatingGrid/RotatingGrid.cpp b/apps/gpu/RotatingGrid/RotatingGrid.cpp
index 7279caf1a18a2770a1fb930a89e5b306bced34f3..bc13d54b46fdd4421eb69c9305ad3daaab792078 100644
--- a/apps/gpu/RotatingGrid/RotatingGrid.cpp
+++ b/apps/gpu/RotatingGrid/RotatingGrid.cpp
@@ -77,7 +77,7 @@ int main()
         // Simulation parameters
         //////////////////////////////////////////////////////////////////////////
         enum RotationOrInterpolation {Rot, Int};
-        const RotationOrInterpolation rotOrInt = Rot;
+        const RotationOrInterpolation rotOrInt = Int;
 
         const std::string path("./output/RotatingGrid");
         const std::string simulationName = rotOrInt == Int ? "RotatingGridInterpolationTest" : "RotatingGrid";
@@ -197,7 +197,7 @@ int main()
 
         Simulation sim(para, cudaMemoryManager, communicator, *gridGenerator, &bcFactory, &scalingFactory);
 
-        const std::string gridName = rotOrInt == Rot ? "rot_grid" : "rot";
+        const std::string gridName = rotOrInt == Rot ? "rot_grid" : "grid";
         gridBuilder->writeGridsToVtk(para->getOutputPath() + gridName);
         // NeighborDebugWriter::writeNeighborLinkLinesDebug(para.get());
 
diff --git a/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.cpp b/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.cpp
index b41813e12da1727ba03b7f179c93b4c6b042b76f..fbbf7460e9ec17946171f0f228ead6718ba13543 100644
--- a/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.cpp
+++ b/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.cpp
@@ -162,13 +162,13 @@ bool Conglomerate::isPointInObject(const double& x1, const double& x2, const dou
     return false;
 }
 
-void Conglomerate::scale(double delta)
+void Conglomerate::changeSizeByDelta(double delta)
 {
     for (uint i = 0; i < numberOfAddObjects; i++)
-        addObjects[i]->scale(delta);
+        addObjects[i]->changeSizeByDelta(delta);
 
     for (uint i = 0; i < numberOfSubtractObjects; i++)
-        subtractObjects[i]->scale(delta);
+        subtractObjects[i]->changeSizeByDelta(delta);
 }
 
 void Conglomerate::findInnerNodes(SPtr<GridImp> grid)
diff --git a/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.h b/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.h
index 0b3f7ad7b67554b72ad78188d68d9570bf21e090..ed6caace2bd3d99bd119c0771f1f5312a815dc40 100644
--- a/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.h
+++ b/src/gpu/GridGenerator/geometries/Conglomerate/Conglomerate.h
@@ -63,7 +63,7 @@ public:
     double getX3Minimum() override;
     double getX3Maximum() override;
 
-    void scale(double delta) override;
+    void changeSizeByDelta(double delta) override;
 
     bool isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset, const double& maxOffset) override;
 
diff --git a/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.cpp b/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.cpp
index 2cf56a867954abecf14f7dc2a74f735ebb0660a7..e6c05313b24a656ed9171f7385d0c68a3fd7f9f6 100644
--- a/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.cpp
+++ b/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.cpp
@@ -131,7 +131,7 @@ bool Cuboid::isBetween(const real& coord, const real& start, const real& end)
 }
 
 
-void Cuboid::scale(double delta)
+void Cuboid::changeSizeByDelta(double delta)
 {
     this->minX1 -= delta;
     this->minX2 -= delta;
diff --git a/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.h b/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.h
index 7ff5c14c2f17b4ed80f4f1e0c03d26ea1a2eb196..152a8dc6b6dd89c565ec55e49c943a5d18dab782 100644
--- a/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.h
+++ b/src/gpu/GridGenerator/geometries/Cuboid/Cuboid.h
@@ -54,7 +54,7 @@ public:
     double getX3Minimum() override;
     double getX3Maximum() override;
 
-    void scale(double delta) override;
+    void changeSizeByDelta(double delta) override;
 
     bool isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset, const double& maxOffset) override;
 
diff --git a/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.cpp b/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.cpp
index ed7a2f04eb62b4596332060bb0f6fa2bc460e32a..a102e01cd211f3a46d24f92e5541613a2b939d9e 100644
--- a/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.cpp
+++ b/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.cpp
@@ -80,14 +80,49 @@ double Cylinder::getX3Maximum()
     return getMaximumCoordinate(z);
 }
 
-////////////////// #TODO
+double Cylinder::getRadius() const
+{
+    return radius;
+}
+
+double Cylinder::getHeight() const
+{
+    return height;
+}
 
-bool Cylinder::isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset, const double& maxOffset)
+bool Cylinder::isInCircle(double delta1, double delta2, double offset) const
 {
- return false;
+    return (delta1 * delta1 + delta2 * delta2) < ((this->radius - offset) * (this->radius - offset));
 }
 
+bool Cylinder::isPointInObject(const double &x1, const double &x2, const double &x3, const double &minOffset,
+                               const double &maxOffset)
+{
+    double offset = maxOffset;
+    if (x1 < center.at(x) || x2 < center.at(y) || x3 < center.at(z)) offset = minOffset;
+
+    const double deltaX1 = x1 - center.at(x);
+    const double deltaX2 = x2 - center.at(y);
+    const double deltaX3 = x3 - center.at(z);
+
+    switch (principalAxis) {
+        case x:
+            if (deltaX1 > 0.5 * height || deltaX1 < -0.5 * height) return false;
+            return isInCircle(deltaX2, deltaX3, offset);
+        case y:
+            if (deltaX2 > 0.5 * height || deltaX2 < -0.5 * height) return false;
+            return isInCircle(deltaX1, deltaX3, offset);
+        case z:
+            if (deltaX3 > 0.5 * height || deltaX3 < -0.5 * height) return false;
+            return isInCircle(deltaX1, deltaX2, offset);
+    }
+
+    VF_LOG_CRITICAL("Unknown principal axis in Cylinder.");
+    return false;
+}
 
-void Cylinder::scale(double delta)
+void Cylinder::changeSizeByDelta(double delta)
 {
+    this->radius += delta;
+    this->height += 2 * delta;
 }
\ No newline at end of file
diff --git a/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.h b/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.h
index 0bbb22ab22de07cb1a90f5aca08d36c0b687167c..5af1f3b15f205f5a44196a984ebd551c047e51fd 100644
--- a/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.h
+++ b/src/gpu/GridGenerator/geometries/Cylinder/Cylinder.h
@@ -63,15 +63,20 @@ public:
     double getX3Minimum() override;
     double getX3Maximum() override;
 
+    double getRadius() const;
+    double getHeight() const;
+
     bool isPointInObject(const double &x1, const double &x2, const double &x3, const double &minOffset,
                          const double &maxOffset) override;
-    void scale(double delta) override;
+    void changeSizeByDelta(double delta) override;
 
 private:
     double getCentroidCoordinate(PrincipalAxis coordinateDirection) const;
     double getMinimunCoordinate(PrincipalAxis coordinateDirection) const;
     double getMaximumCoordinate(PrincipalAxis coordinateDirection) const;
 
+    bool isInCircle(double delta1, double delta2, double offset) const;
+
     const std::map<PrincipalAxis, std::array<double, 3>> unitVectors{ { x, { 1, 0, 0 } },
                                                                       { y, { 0, 1, 0 } },
                                                                       { z, { 0, 0, 1 } } };
diff --git a/src/gpu/GridGenerator/geometries/Cylinder/CylinderTest.cpp b/src/gpu/GridGenerator/geometries/Cylinder/CylinderTest.cpp
index d55c0bb6f7000f982b7ddcc698f38440a8aaf744..6c0582f488783adc5fb5678d9b482ba151cbd9a2 100644
--- a/src/gpu/GridGenerator/geometries/Cylinder/CylinderTest.cpp
+++ b/src/gpu/GridGenerator/geometries/Cylinder/CylinderTest.cpp
@@ -2,11 +2,37 @@
 
 #include "Cylinder.h"
 
+
+void testChangeSizeByDelta(Cylinder &cylinder)
+{
+    const double delta = 0.2;
+    const double tolerance = 0.0000000001;
+    const double oldRadius = cylinder.getRadius();
+    const double oldHeight = cylinder.getHeight();
+    const double oldMinimumX1 = cylinder.getX1Minimum();
+    const double oldMinimumX2 = cylinder.getX2Minimum();
+    const double oldMinimumX3 = cylinder.getX3Minimum();
+    const double oldMaximumX1 = cylinder.getX1Maximum();
+    const double oldMaximumX2 = cylinder.getX2Maximum();
+    const double oldMaximumX3 = cylinder.getX3Maximum();
+
+    cylinder.changeSizeByDelta(delta);
+
+    EXPECT_THAT(cylinder.getRadius(), testing::Eq(oldRadius + delta));
+    EXPECT_THAT(cylinder.getHeight(), testing::Eq(oldHeight + 2 * delta));
+    EXPECT_THAT(cylinder.getX1Minimum(), testing::DoubleNear(oldMinimumX1 - delta, tolerance));
+    EXPECT_THAT(cylinder.getX2Minimum(), testing::DoubleNear(oldMinimumX2 - delta, tolerance));
+    EXPECT_THAT(cylinder.getX3Minimum(), testing::DoubleNear(oldMinimumX3 - delta, tolerance));
+    EXPECT_THAT(cylinder.getX1Maximum(), testing::DoubleNear(oldMaximumX1 + delta, tolerance));
+    EXPECT_THAT(cylinder.getX2Maximum(), testing::DoubleNear(oldMaximumX2 + delta, tolerance));
+    EXPECT_THAT(cylinder.getX3Maximum(), testing::DoubleNear(oldMaximumX3 + delta, tolerance));
+}
+
 // CylinderTestAxisNormalToX ////////////////////////////////////////////////
 
 class CylinderTestAxisNormalToX : public testing::Test
 {
-protected:
+public:
     std::array<double, 3> center = { 0.1, 0.2, 0.3 };
     double radius = 2.0;
     double height = 8.0;
@@ -34,6 +60,35 @@ TEST_F(CylinderTestAxisNormalToX, getMaximum)
     EXPECT_THAT(cylinder.getX3Maximum(), testing::Eq(radius + center[2]));
 }
 
+TEST_F(CylinderTestAxisNormalToX, isPointInObject)
+{
+    double epsilon = 0.0001;
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2], 0.0, 0.0));
+
+    // x
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] - 0.5 * height + epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] - 0.5 * height - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] + 0.5 * height - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] + 0.5 * height + epsilon, center[1], center[2], 0.0, 0.0));
+
+    // y
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] - radius + epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] - radius - epsilon, center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] + radius - epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] + radius + epsilon, center[2], 0.0, 0.0));
+
+    // z
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] - radius + epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] - radius - epsilon, 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] + radius - epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] + radius + epsilon, 0.0, 0.0));
+}
+
+TEST_F(CylinderTestAxisNormalToX, changeSizeByDelta)
+{
+    testChangeSizeByDelta(cylinder);
+}
+
 // CylinderTestAxisNormalToY ////////////////////////////////////////////////
 
 class CylinderTestAxisNormalToY : public testing::Test
@@ -66,6 +121,35 @@ TEST_F(CylinderTestAxisNormalToY, getMaximum)
     EXPECT_THAT(cylinder.getX3Maximum(), testing::Eq(radius + center[2]));
 }
 
+TEST_F(CylinderTestAxisNormalToY, isPointInObject)
+{
+    double epsilon = 0.0001;
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2], 0.0, 0.0));
+
+    // x
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] - radius + epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] - radius - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] + radius - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] + radius + epsilon, center[1], center[2], 0.0, 0.0));
+
+    // y
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] - 0.5 * height + epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] - 0.5 * height - epsilon, center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] + 0.5 * height - epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] + 0.5 * height + epsilon, center[2], 0.0, 0.0));
+
+    // z
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] - radius + epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] - radius - epsilon, 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] + radius - epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] + radius + epsilon, 0.0, 0.0));
+}
+
+TEST_F(CylinderTestAxisNormalToY, changeSizeByDelta)
+{
+    testChangeSizeByDelta(cylinder);
+}
+
 // CylinderTestAxisNormalToZ ////////////////////////////////////////////////
 
 class CylinderTestAxisNormalToZ : public testing::Test
@@ -96,4 +180,33 @@ TEST_F(CylinderTestAxisNormalToZ, getMaximum)
     EXPECT_THAT(cylinder.getX1Maximum(), testing::Eq(radius + center[0]));
     EXPECT_THAT(cylinder.getX2Maximum(), testing::Eq(radius + center[1]));
     EXPECT_THAT(cylinder.getX3Maximum(), testing::Eq(0.5 * height + center[2]));
-}
\ No newline at end of file
+}
+
+TEST_F(CylinderTestAxisNormalToZ, isPointInObject)
+{
+    double epsilon = 0.0001;
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2], 0.0, 0.0));
+
+    // x
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] - radius + epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] - radius - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] + radius - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] + radius + epsilon, center[1], center[2], 0.0, 0.0));
+
+    // y
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] - radius + epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] - radius - epsilon, center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] + radius - epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] + radius + epsilon, center[2], 0.0, 0.0));
+
+    // z
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] - 0.5 * height + epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] - 0.5 * height - epsilon, 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] + 0.5 * height - epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] + 0.5 * height + epsilon, 0.0, 0.0));
+}
+
+TEST_F(CylinderTestAxisNormalToZ, changeSizeByDelta)
+{
+    testChangeSizeByDelta(cylinder);
+}
diff --git a/src/gpu/GridGenerator/geometries/Object.h b/src/gpu/GridGenerator/geometries/Object.h
index 8bb0a35d5e38df1f7db390fdf5ee750295788395..4448a45aecd2c89188ff955c570cf7fd38c2ba3b 100644
--- a/src/gpu/GridGenerator/geometries/Object.h
+++ b/src/gpu/GridGenerator/geometries/Object.h
@@ -59,7 +59,7 @@ public:
     virtual double getX3Maximum()  = 0;
 
 
-    virtual void scale(double delta) = 0;
+    virtual void changeSizeByDelta(double delta) = 0;
 
 
     virtual bool isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset, const double& maxOffset) = 0;
diff --git a/src/gpu/GridGenerator/geometries/Sphere/Sphere.cpp b/src/gpu/GridGenerator/geometries/Sphere/Sphere.cpp
index 4669bbcfb9848a910bc86f9331a394daf6c55dd5..212ecc90019d6ab87230b4faa717da2d754fc75c 100644
--- a/src/gpu/GridGenerator/geometries/Sphere/Sphere.cpp
+++ b/src/gpu/GridGenerator/geometries/Sphere/Sphere.cpp
@@ -115,7 +115,7 @@ bool Sphere::isPointInObject(const double& x1, const double& x2, const double& x
 }
 
 
-void Sphere::scale(double delta)
+void Sphere::changeSizeByDelta(double delta)
 {
     this->radius += delta;
 }
diff --git a/src/gpu/GridGenerator/geometries/Sphere/Sphere.h b/src/gpu/GridGenerator/geometries/Sphere/Sphere.h
index 9ac8821a9c95fce8de16c22688ef3c585197804a..99d055ec1ba04117d4fdd525520a277d8129e9f7 100644
--- a/src/gpu/GridGenerator/geometries/Sphere/Sphere.h
+++ b/src/gpu/GridGenerator/geometries/Sphere/Sphere.h
@@ -59,7 +59,7 @@ public:
     bool isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset, const double& maxOffset) override;
 
 
-    void scale(double delta) override;
+    void changeSizeByDelta(double delta) override;
     
     int getIntersection(const Vertex &P, const Vertex &direction, Vertex &pointOnObject, real &qVal) override;
 
diff --git a/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.cpp b/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.cpp
index 91bb8f030e76fa6e083e7765feb18c7ccc517ee1..e5ab3c83291b8f4fd27bb3eee5f26d3fcdb69278 100644
--- a/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.cpp
+++ b/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.cpp
@@ -185,7 +185,7 @@ bool intersectPlane(const Vertex &normal, const Vertex &pointOnPlane, const Vert
     return false;
 }
 
-void TriangularMesh::scale(double offset)
+void TriangularMesh::changeSizeByDelta(double offset)
 {
     std::vector<Triangle> triangles = this->triangleVec;
 
diff --git a/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.h b/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.h
index 7c050dd70b3908f3e4b021872887c74833594a26..5083e2adf9a91fcf9f8cfdb6da83d38a9eb19a9d 100644
--- a/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.h
+++ b/src/gpu/GridGenerator/geometries/TriangularMesh/TriangularMesh.h
@@ -97,7 +97,7 @@ public:
     double getX3Centroid() override { throw "Not implemented in TriangularMesh"; }
     double getX3Minimum() override { return minmax.minZ; }
     double getX3Maximum() override { return minmax.maxZ; }
-    void scale(double delta) override;
+    void changeSizeByDelta(double delta) override;
     bool isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset,
         const double& maxOffset) override {
         return false;
diff --git a/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.cpp b/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.cpp
index 102fb258bcc7c5d46e88b3a33c11488b728fc267..439585ff246f82a7e820f514ecd5ed609f441797 100644
--- a/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.cpp
+++ b/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.cpp
@@ -111,10 +111,10 @@ bool VerticalCylinder::isPointInObject(const double& x1, const double& x2, const
 }
 
 
-void VerticalCylinder::scale(double delta)
+void VerticalCylinder::changeSizeByDelta(double delta)
 {
     this->radius += delta;
-    this->height += delta;
+    this->height += 2 * delta;
 }
 
 double VerticalCylinder::getRadius() const
diff --git a/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.h b/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.h
index b6676cdc3f3de9b0222b45651aef3cc1e94219db..3ffcba063e78b45f7965f5e7fe3909c7437b27ab 100644
--- a/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.h
+++ b/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinder.h
@@ -62,7 +62,7 @@ public:
     bool isPointInObject(const double& x1, const double& x2, const double& x3, const double& minOffset, const double& maxOffset) override;
 
 
-    void scale(double delta) override;
+    void changeSizeByDelta(double delta) override;
 
 protected:
     double centerX;
diff --git a/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinderTest.cpp b/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinderTest.cpp
index 3372197bc094b67cf8a8754a6d00cf95f73952e3..7bca5db9988000ecb925667a70e0615fadff5376 100644
--- a/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinderTest.cpp
+++ b/src/gpu/GridGenerator/geometries/VerticalCylinder/VerticalCylinderTest.cpp
@@ -32,4 +32,26 @@ TEST_F(VerticalCylinderTest, getMaximum)
     EXPECT_THAT(cylinder.getX3Maximum(), testing::Eq(0.5 * height + center[2]));
 }
 
-// TEST_F()
\ No newline at end of file
+TEST_F(VerticalCylinderTest, isPointInObject)
+{
+    double epsilon = 0.0001;
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2], 0.0, 0.0));
+
+    // x
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] - radius + epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] - radius - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0] + radius - epsilon, center[1], center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0] + radius + epsilon, center[1], center[2], 0.0, 0.0));
+
+    // y
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] - radius + epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] - radius - epsilon, center[2], 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1] + radius - epsilon, center[2], 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1] + radius + epsilon, center[2], 0.0, 0.0));
+
+    // z
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] - 0.5 * height + epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] - 0.5 * height - epsilon, 0.0, 0.0));
+    EXPECT_TRUE(cylinder.isPointInObject(center[0], center[1], center[2] + 0.5 * height - epsilon, 0.0, 0.0));
+    EXPECT_FALSE(cylinder.isPointInObject(center[0], center[1], center[2] + 0.5 * height + epsilon, 0.0, 0.0));
+}
\ No newline at end of file
diff --git a/src/gpu/GridGenerator/grid/GridBuilder/MultipleGridBuilder.cpp b/src/gpu/GridGenerator/grid/GridBuilder/MultipleGridBuilder.cpp
index 78b879ea84e88e4382dfae36943bfda2696a8fb3..e087ef11f54bb20b3813bfbf9044bf4e0a7b3624 100644
--- a/src/gpu/GridGenerator/grid/GridBuilder/MultipleGridBuilder.cpp
+++ b/src/gpu/GridGenerator/grid/GridBuilder/MultipleGridBuilder.cpp
@@ -86,7 +86,7 @@ void MultipleGridBuilder::addGeometry(SPtr<Object> solidObject, uint level)
 {
     this->solidObject = solidObject;
     auto gridShape = solidObject->clone();
-    gridShape->scale(4.0);
+    gridShape->changeSizeByDelta(4.0);
 
     this->addGrid(gridShape, level);
 }
@@ -169,7 +169,7 @@ void MultipleGridBuilder::addIntermediateGridsToList(uint levelDifference, uint
         {
             const real scalingFactor = nodesBetweenGrids * spacings[i] * calculateDelta(levelFine);
             SPtr<Object> gridShapeClone = gridShape->clone();
-            gridShapeClone->scale(scalingFactor);
+            gridShapeClone->changeSizeByDelta(scalingFactor);
 
             const auto grid = makeGrid(gridShapeClone, level++, 0);
             grids.push_back(grid);
@@ -267,8 +267,12 @@ SPtr<Grid> MultipleGridBuilder::makeRotatingGrid(SPtr<VerticalCylinder> cylinder
                                                               staggeredCoordinates[4],
                                                               staggeredCoordinates[5], delta, level);
 
-    cylinder = std::make_shared<VerticalCylinder>(cylinder->getX1Centroid(), cylinder->getX2Centroid(), cylinder->getX3Centroid(), cylinder->getRadius()+5*delta, cylinder->getHeight()+6*delta);
-    VF_LOG_WARNING("RotGr: LargerCylinder Size x : {}, {} \n z: {}, {}", cylinder->getX1Minimum(), cylinder->getX1Maximum(), cylinder->getX3Minimum(), cylinder->getX3Maximum());
+    // #TODO: change next line to use staggering
+    cylinder = std::make_shared<VerticalCylinder>(cylinder->getX1Centroid(), cylinder->getX2Centroid(),
+                                                  cylinder->getX3Centroid(), cylinder->getRadius() + 6.0 * delta,
+                                                  cylinder->getHeight() + 6.0 * delta);
+    VF_LOG_WARNING("RotGr: LargerCylinder Size x : {}, {} \n z: {}, {}", cylinder->getX1Minimum(), cylinder->getX1Maximum(),
+                   cylinder->getX3Minimum(), cylinder->getX3Maximum());
 
     SPtr<Grid> newGrid = this->makeGrid(cylinder, staggeredCoordinates[0],
                                                   staggeredCoordinates[1],