diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4761450..fa049c3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.15.2)
 # 设置项目名称与语言
-project(GCTL_POTENTIAL VERSION 1.0)
+project(GCTL_POTENTIAL VERSION 2.0)
 # 添加配置配件编写的函数
 include(CMakePackageConfigHelpers)
 
diff --git a/lib/potential/gkernel_block.h b/lib/potential/gkernel_block.h
index fa25a48..0c4f854 100644
--- a/lib/potential/gkernel_block.h
+++ b/lib/potential/gkernel_block.h
@@ -29,6 +29,9 @@
 #define _GCTL_GRAV_KERNEL_BLOCK_H
 
 #include "gm_data.h"
+#include "gctl/poly/block.h"
+#include "gctl/utility/progress_bar.h"
+#include "gctl/math/gmath.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gkernel_polygon.h b/lib/potential/gkernel_polygon.h
index c58e32c..659c21a 100644
--- a/lib/potential/gkernel_polygon.h
+++ b/lib/potential/gkernel_polygon.h
@@ -29,6 +29,7 @@
 #define _GCTL_GRAV_KERNEL_POLYGON_H
 
 #include "gm_data.h"
+#include "gctl/poly/vertex.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gkernel_rectangle2d.h b/lib/potential/gkernel_rectangle2d.h
index cb85157..9fec801 100644
--- a/lib/potential/gkernel_rectangle2d.h
+++ b/lib/potential/gkernel_rectangle2d.h
@@ -29,6 +29,9 @@
 #define _GCTL_GRAV_KERNEL_RECTANGLE2D_H
 
 #include "gm_data.h"
+#include "gctl/poly/point2c.h"
+#include "gctl/poly/rectangle2d.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gkernel_sphere.h b/lib/potential/gkernel_sphere.h
index 256a99b..c19a6c7 100644
--- a/lib/potential/gkernel_sphere.h
+++ b/lib/potential/gkernel_sphere.h
@@ -29,6 +29,7 @@
 #define _GCTL_GRAV_KERNEL_SPHERE_H
 
 #include "gm_data.h"
+#include "gctl/poly/sphere.h"
 #include "gctl/optimization/loss_func.h"
 
 #ifdef GCTL_POTENTIAL_AUTODIFF
diff --git a/lib/potential/gkernel_tesseroid.h b/lib/potential/gkernel_tesseroid.h
index 459f151..b20081c 100644
--- a/lib/potential/gkernel_tesseroid.h
+++ b/lib/potential/gkernel_tesseroid.h
@@ -29,6 +29,8 @@
 #define _GCTL_GRAV_KERNEL_TESSEROID_H
 
 #include "gm_data.h"
+#include "gctl/poly/tesseroid.h"
+#include "gctl/utility/progress_bar.h"
 
 #ifdef GCTL_POTENTIAL_TESS
 
diff --git a/lib/potential/gkernel_tetrahedron.cpp b/lib/potential/gkernel_tetrahedron.cpp
index 57edb22..2faf2dd 100644
--- a/lib/potential/gkernel_tetrahedron.cpp
+++ b/lib/potential/gkernel_tetrahedron.cpp
@@ -1039,7 +1039,7 @@ double gkernel_tetra_potential_sig_sph(const gctl::grav_tetrahedron &a_ele, cons
 
 	gctl::gravtet_para* gp = a_ele.att;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	int *v_order = a_ele.vec_order;
 
@@ -1108,7 +1108,7 @@ gctl::point3dc gkernel_tetra_gradient_sig_sph(const gctl::grav_tetrahedron &a_el
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	int *v_order = a_ele.vec_order;
 
@@ -1178,7 +1178,7 @@ gctl::tensor gkernel_tetra_tensor_sig_sph(const gctl::grav_tetrahedron &a_ele, c
 
 	R_T = R.transpose();
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	int *v_order = a_ele.vec_order;
 
diff --git a/lib/potential/gkernel_tetrahedron.h b/lib/potential/gkernel_tetrahedron.h
index 65ad1de..dbdc64a 100644
--- a/lib/potential/gkernel_tetrahedron.h
+++ b/lib/potential/gkernel_tetrahedron.h
@@ -29,6 +29,9 @@
 #define _GCTL_GRAV_KERNEL_TETRAHEDRON_H
 
 #include "gm_data.h"
+#include "gctl/poly/tetrahedron.h"
+#include "gctl/math/geometry3d.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gkernel_triangle.cpp b/lib/potential/gkernel_triangle.cpp
index d0e5034..361ac26 100644
--- a/lib/potential/gkernel_triangle.cpp
+++ b/lib/potential/gkernel_triangle.cpp
@@ -360,7 +360,7 @@ double gkernel_triangle_potential_sig_sph(const gctl::grav_triangle &a_ele, cons
 
 	gctl::gravtri_para *gp = a_ele.att;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	r_ijk[0] = *a_ele.vert[0] - op_c;
 	r_ijk[1] = *a_ele.vert[1] - op_c;
@@ -423,7 +423,7 @@ gctl::point3dc gkernel_triangle_gradient_sig_sph(const gctl::grav_triangle &a_el
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	r_ijk[0] = *a_ele.vert[0] - op_c;
 	r_ijk[1] = *a_ele.vert[1] - op_c;
@@ -487,7 +487,7 @@ gctl::tensor gkernel_triangle_tensor_sig_sph(const gctl::grav_triangle &a_ele, c
 
 	R_T = R.transpose();
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	r_ijk[0] = *a_ele.vert[0] - op_c;
 	r_ijk[1] = *a_ele.vert[1] - op_c;
diff --git a/lib/potential/gkernel_triangle.h b/lib/potential/gkernel_triangle.h
index 51e12ee..048b1cd 100644
--- a/lib/potential/gkernel_triangle.h
+++ b/lib/potential/gkernel_triangle.h
@@ -29,6 +29,8 @@
 #define _GCTL_GRAV_KERNEL_TRIANGLE_H
 
 #include "gm_data.h"
+#include "gctl/poly/triangle.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gkernel_triangle2d.cpp b/lib/potential/gkernel_triangle2d.cpp
index bda0f9d..af184a4 100644
--- a/lib/potential/gkernel_triangle2d.cpp
+++ b/lib/potential/gkernel_triangle2d.cpp
@@ -443,7 +443,7 @@ void gkernel_triangle2d_vz2(gctl::matrix<double> &out_kernel, const gctl::array<
 		if (verbose == gctl::FullMsg) bar.progressed(i);
 		else if (verbose == gctl::ShortMsg) bar.progressed_simple(i);
 
-		obsc = obsp[i].p2c();
+		obsc = p2c(obsp[i]);
 
 #pragma omp parallel for private (j, obsg) schedule(guided)
 		for (j = 0; j < e_size; j++)
@@ -471,7 +471,7 @@ void gkernel_triangle2d_vx2(gctl::matrix<double> &out_kernel, const gctl::array<
 		if (verbose == gctl::FullMsg) bar.progressed(i);
 		else if (verbose == gctl::ShortMsg) bar.progressed_simple(i);
 
-		obsc = obsp[i].p2c();
+		obsc = p2c(obsp[i]);
 
 #pragma omp parallel for private (j, obsg) schedule(guided)
 		for (j = 0; j < e_size; j++)
@@ -500,7 +500,7 @@ void gkernel_triangle2d_vxx2(gctl::matrix<double> &out_kernel, const gctl::array
 		if (verbose == gctl::FullMsg) bar.progressed(i);
 		else if (verbose == gctl::ShortMsg) bar.progressed_simple(i);
 
-		obsc = obsp[i].p2c();
+		obsc = p2c(obsp[i]);
 
 #pragma omp parallel for private (j, t) schedule(guided)
 		for (j = 0; j < e_size; j++)
@@ -532,7 +532,7 @@ void gkernel_triangle2d_vxz2(gctl::matrix<double> &out_kernel, const gctl::array
 		if (verbose == gctl::FullMsg) bar.progressed(i);
 		else if (verbose == gctl::ShortMsg) bar.progressed_simple(i);
 
-		obsc = obsp[i].p2c();
+		obsc = p2c(obsp[i]);
 
 #pragma omp parallel for private (j, t) schedule(guided)
 		for (j = 0; j < e_size; j++)
@@ -564,7 +564,7 @@ void gkernel_triangle2d_vzx2(gctl::matrix<double> &out_kernel, const gctl::array
 		if (verbose == gctl::FullMsg) bar.progressed(i);
 		else if (verbose == gctl::ShortMsg) bar.progressed_simple(i);
 
-		obsc = obsp[i].p2c();
+		obsc = p2c(obsp[i]);
 
 #pragma omp parallel for private (j, t) schedule(guided)
 		for (j = 0; j < e_size; j++)
@@ -596,7 +596,7 @@ void gkernel_triangle2d_vzz2(gctl::matrix<double> &out_kernel, const gctl::array
 		if (verbose == gctl::FullMsg) bar.progressed(i);
 		else if (verbose == gctl::ShortMsg) bar.progressed_simple(i);
 
-		obsc = obsp[i].p2c();
+		obsc = p2c(obsp[i]);
 
 #pragma omp parallel for private (j, t) schedule(guided)
 		for (j = 0; j < e_size; j++)
@@ -774,7 +774,7 @@ void gobser_triangle2d_vz2(gctl::array<double> &out_obs, const gctl::array<gctl:
 #pragma omp parallel for private (i, obsg, obsc) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsc = obsp[i].p2c();
+			obsc = p2c(obsp[i]);
 			obsg.x = gkernel_triangle2d_vx_sig(ele.get(j), &obsc); // 沿x轴正方向的重力值
 			obsg.y = gkernel_triangle2d_vz_sig(ele.get(j), &obsc); // 沿z轴负方向的重力值
 			out_obs[i] += (obsg.y*sin(obsp[i].arc) - obsg.x*cos(obsp[i].arc))*rho[j]; // 沿半径负方向的重力值
@@ -802,7 +802,7 @@ void gobser_triangle2d_vx2(gctl::array<double> &out_obs, const gctl::array<gctl:
 #pragma omp parallel for private (i, obsg, obsc) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsc = obsp[i].p2c();
+			obsc = p2c(obsp[i]);
 			obsg.x = gkernel_triangle2d_vx_sig(ele.get(j), &obsc); // 沿x轴正方向的重力值
 			obsg.y = gkernel_triangle2d_vz_sig(ele.get(j), &obsc); // 沿z轴负方向的重力值
 			out_obs[i] += (-1.0*obsg.y*cos(obsp[i].arc) + obsg.x*sin(obsp[i].arc))*rho[j]; // 沿弧度负方向的重力值
@@ -831,7 +831,7 @@ void gobser_triangle2d_vxx2(gctl::array<double> &out_obs, const gctl::array<gctl
 #pragma omp parallel for private (i, t, obsc) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsc = obsp[i].p2c();
+			obsc = p2c(obsp[i]);
 			t[1][0] = gkernel_triangle2d_vzx_sig(ele.get(j), &obsc);
 			t[1][1] = gkernel_triangle2d_vzz_sig(ele.get(j), &obsc);
 			t[0][0] = -1.0*t[1][1];
@@ -862,7 +862,7 @@ void gobser_triangle2d_vxz2(gctl::array<double> &out_obs, const gctl::array<gctl
 #pragma omp parallel for private (i, t, obsc) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsc = obsp[i].p2c();
+			obsc = p2c(obsp[i]);
 			t[1][0] = gkernel_triangle2d_vzx_sig(ele.get(j), &obsc);
 			t[1][1] = gkernel_triangle2d_vzz_sig(ele.get(j), &obsc);
 			t[0][0] = -1.0*t[1][1];
@@ -893,7 +893,7 @@ void gobser_triangle2d_vzx2(gctl::array<double> &out_obs, const gctl::array<gctl
 #pragma omp parallel for private (i, t, obsc) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsc = obsp[i].p2c();
+			obsc = p2c(obsp[i]);
 			t[1][0] = gkernel_triangle2d_vzx_sig(ele.get(j), &obsc);
 			t[1][1] = gkernel_triangle2d_vzz_sig(ele.get(j), &obsc);
 			t[0][0] = -1.0*t[1][1];
@@ -924,7 +924,7 @@ void gobser_triangle2d_vzz2(gctl::array<double> &out_obs, const gctl::array<gctl
 #pragma omp parallel for private (i, t, obsc) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsc = obsp[i].p2c();
+			obsc = p2c(obsp[i]);
 			t[1][0] = gkernel_triangle2d_vzx_sig(ele.get(j), &obsc);
 			t[1][1] = gkernel_triangle2d_vzz_sig(ele.get(j), &obsc);
 			t[0][0] = -1.0*t[1][1];
diff --git a/lib/potential/gkernel_triangle2d.h b/lib/potential/gkernel_triangle2d.h
index d599a83..24f67e6 100644
--- a/lib/potential/gkernel_triangle2d.h
+++ b/lib/potential/gkernel_triangle2d.h
@@ -29,6 +29,8 @@
 #define _GCTL_GRAV_KERNEL_TRIANGLE2D_H
 
 #include "gm_data.h"
+#include "gctl/poly/triangle2d.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gkernel_tricone.cpp b/lib/potential/gkernel_tricone.cpp
index cc719db..96c0585 100644
--- a/lib/potential/gkernel_tricone.cpp
+++ b/lib/potential/gkernel_tricone.cpp
@@ -432,7 +432,7 @@ double gkernel_tricone_pot_sig(const gctl::gravcone &a_ele, const gctl::point3ds
 
 	gctl::gravcone_para* gp = a_ele.att;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -533,7 +533,7 @@ double gkernel_tricone_vr_sig(const gctl::gravcone &a_ele, const gctl::point3ds
 	R.y = sin((0.5-a_op.lat/180.0)*GCTL_Pi)*sin((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R.z = cos((0.5-a_op.lat/180.0)*GCTL_Pi);
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -597,7 +597,7 @@ double gkernel_tricone_vrp_sig(const gctl::gravcone &a_ele, const gctl::point3ds
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -666,7 +666,7 @@ double gkernel_tricone_vrt_sig(const gctl::gravcone &a_ele, const gctl::point3ds
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -735,7 +735,7 @@ double gkernel_tricone_vrr_sig(const gctl::gravcone &a_ele, const gctl::point3ds
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
diff --git a/lib/potential/gkernel_tricone.h b/lib/potential/gkernel_tricone.h
index f6d49bc..5f67047 100644
--- a/lib/potential/gkernel_tricone.h
+++ b/lib/potential/gkernel_tricone.h
@@ -29,6 +29,9 @@
 #define _GCTL_GRAV_KERNEL_TRICONE_H
 
 #include "gm_data.h"
+#include "gctl/poly/tri_cone.h"
+#include "gctl/math/geometry3d.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gkernel_tricone_model_gradient.cpp b/lib/potential/gkernel_tricone_model_gradient.cpp
index 925e560..190a58c 100644
--- a/lib/potential/gkernel_tricone_model_gradient.cpp
+++ b/lib/potential/gkernel_tricone_model_gradient.cpp
@@ -334,7 +334,7 @@ void gobser_mGrad_tricone_vr(gctl::array<double> &out_mGrad,
 #pragma omp parallel for private (j) shared(i) schedule(guided)
 			for (j = 0; j < v_size; j++)
 			{
-				if (angle(ops[i].s2c(), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
+				if (angle(s2c(ops[i]), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
 					out_mGrad.at(j) += obs_diff[i] * gobser_mGrad_tricone_vr_sig(vert_neighList[j], j, ops[i], rho);
 			}
 		}
@@ -379,7 +379,7 @@ void gobser_mGrad_tricone_vrp(gctl::array<double> &out_mGrad,
 #pragma omp parallel for private (j) shared(i) schedule(guided)
 			for (j = 0; j < v_size; j++)
 			{
-				if (angle(ops[i].s2c(), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
+				if (angle(s2c(ops[i]), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
 					out_mGrad.at(j) += obs_diff[i] * gobser_mGrad_tricone_vrp_sig(vert_neighList[j], j, ops[i], rho);
 			}
 		}
@@ -424,7 +424,7 @@ void gobser_mGrad_tricone_vrt(gctl::array<double> &out_mGrad,
 #pragma omp parallel for private (j) shared(i) schedule(guided)
 			for (j = 0; j < v_size; j++)
 			{
-				if (angle(ops[i].s2c(), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
+				if (angle(s2c(ops[i]), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
 					out_mGrad.at(j) += obs_diff[i] * gobser_mGrad_tricone_vrt_sig(vert_neighList[j], j, ops[i], rho);
 			}
 		}
@@ -469,7 +469,7 @@ void gobser_mGrad_tricone_vrr(gctl::array<double> &out_mGrad,
 #pragma omp parallel for private (j) shared(i) schedule(guided)
 			for (j = 0; j < v_size; j++)
 			{
-				if (angle(ops[i].s2c(), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
+				if (angle(s2c(ops[i]), verts_ptr->at(j)) <= ang_limit*GCTL_Pi/180.0)
 					out_mGrad.at(j) += obs_diff[i] * gobser_mGrad_tricone_vrr_sig(vert_neighList[j], j, ops[i], rho);
 			}
 		}
@@ -631,7 +631,7 @@ double gobser_mGrad_tricone_vr_sig(const std::vector<gctl::gravcone_gji*> &a_lis
 	R.y = sin((0.5-a_op.lat/180.0)*GCTL_Pi)*sin((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R.z = cos((0.5-a_op.lat/180.0)*GCTL_Pi);
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	double point_sum = 0.0;
 	for (int j = 0; j < a_list.size(); j++)
@@ -842,7 +842,7 @@ double gobser_mGrad_tricone_vrp_sig(const std::vector<gctl::gravcone_gji*> &a_li
 	R.y = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R.z = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	double point_sum = 0.0;
 	for (int j = 0; j < a_list.size(); j++)
@@ -1033,7 +1033,7 @@ double gobser_mGrad_tricone_vrt_sig(const std::vector<gctl::gravcone_gji*> &a_li
 	R.y = cos((0.5-a_op.lat/180.0)*GCTL_Pi)*sin((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R.z = -1.0*sin((0.5-a_op.lat/180.0)*GCTL_Pi);
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	double point_sum = 0.0;
 	for (int j = 0; j < a_list.size(); j++)
@@ -1220,7 +1220,7 @@ double gobser_mGrad_tricone_vrr_sig(const std::vector<gctl::gravcone_gji*> &a_li
 	R.y = sin((0.5-a_op.lat/180.0)*GCTL_Pi)*sin((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R.z = cos((0.5-a_op.lat/180.0)*GCTL_Pi);
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	double point_sum = 0.0;
 	for (int j = 0; j < a_list.size(); j++)
@@ -1404,7 +1404,7 @@ double gkernel_tricone_gji_pot_sig(const gctl::gravcone_gji &a_ele, const gctl::
 
 	gctl::gravcone_para_gji* gp = a_ele.att;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -1461,7 +1461,7 @@ double gkernel_tricone_gji_vr_sig(const gctl::gravcone_gji &a_ele, const gctl::p
 	R.y = sin((0.5-a_op.lat/180.0)*GCTL_Pi)*sin((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R.z = cos((0.5-a_op.lat/180.0)*GCTL_Pi);
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -1525,7 +1525,7 @@ double gkernel_tricone_gji_vrp_sig(const gctl::gravcone_gji &a_ele, const gctl::
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -1594,7 +1594,7 @@ double gkernel_tricone_gji_vrt_sig(const gctl::gravcone_gji &a_ele, const gctl::
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
@@ -1663,7 +1663,7 @@ double gkernel_tricone_gji_vrr_sig(const gctl::gravcone_gji &a_ele, const gctl::
 	R[2][1] = cos((2.0+a_op.lon/180.0)*GCTL_Pi);
 	R[2][2] = 0.0;
 
-	op_c = a_op.s2c();
+	op_c = s2c(a_op);
 
 	face_sum = edge_sum = 0.0;
 	for (f = 0; f < 4; f++)
diff --git a/lib/potential/gm_data.h b/lib/potential/gm_data.h
index 92fa6f1..0116011 100644
--- a/lib/potential/gm_data.h
+++ b/lib/potential/gm_data.h
@@ -34,12 +34,12 @@
 #include <thread>
 #endif
 
-#include "gctl/core.h"
-#include "gctl/utility.h"
-#include "gctl/geometry.h"
-#include "gctl/maths.h"
-#include "gctl/algorithms.h"
-#include "gctl/io.h"
+#include "gctl/core/array.h"
+#include "gctl/poly/point3s.h"
+#include "gctl/poly/tensor.h"
+#include "gctl/math/gmath.h"
+#include "gctl/io/dsv_io.h"
+#include "gctl/utility/utc_time.h"
 
 namespace gctl
 {
diff --git a/lib/potential/gm_regular_grid.h b/lib/potential/gm_regular_grid.h
index 4287db6..46306db 100644
--- a/lib/potential/gm_regular_grid.h
+++ b/lib/potential/gm_regular_grid.h
@@ -30,6 +30,8 @@
 
 #include "gctl/mesh/regular_grid.h"
 #include "gm_data.h"
+#include "gctl/math/extrapolate.h"
+#include "gctl/math/space_filter.h"
 
 namespace gctl
 {
diff --git a/lib/potential/mkernel_dipole.cpp b/lib/potential/mkernel_dipole.cpp
index b58a3cd..8070a78 100644
--- a/lib/potential/mkernel_dipole.cpp
+++ b/lib/potential/mkernel_dipole.cpp
@@ -48,7 +48,7 @@ gctl::point3dc gctl::magkernel_single(const mag_dipole &a_dipole, const point3ds
 	else R = transform_matrix(a_op);
 
     double r = a_op.rad;
-    point3dc pc = a_op.s2c();
+    point3dc pc = s2c(a_op);
 
     // T -> nT 1e+9 * 1e-7 -> 1e+2
     point3dc b = 1e+2*a_dipole.M*(3.0*dot(a_dipole.n, pc)/power5(r)*pc - 1.0/power3(r)*a_dipole.n);
diff --git a/lib/potential/mkernel_dipole.h b/lib/potential/mkernel_dipole.h
index a73e7b4..90604c7 100644
--- a/lib/potential/mkernel_dipole.h
+++ b/lib/potential/mkernel_dipole.h
@@ -29,6 +29,8 @@
 #define _GCTL_MAG_KERNEL_DIPOLE_H
 
 #include "gm_data.h"
+#include "gctl/poly/vertex.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/mkernel_tesseroid.h b/lib/potential/mkernel_tesseroid.h
index 4112ef5..5092550 100644
--- a/lib/potential/mkernel_tesseroid.h
+++ b/lib/potential/mkernel_tesseroid.h
@@ -29,6 +29,8 @@
 #define _GCTL_MAG_KERNEL_TESSEROID_H
 
 #include "gm_data.h"
+#include "gctl/poly/tesseroid.h"
+#include "gctl/utility/progress_bar.h"
 
 #ifdef GCTL_POTENTIAL_MAGTESS
 
diff --git a/lib/potential/mkernel_tetrahedron.cpp b/lib/potential/mkernel_tetrahedron.cpp
index c61c79b..1d6d0d6 100644
--- a/lib/potential/mkernel_tetrahedron.cpp
+++ b/lib/potential/mkernel_tetrahedron.cpp
@@ -142,7 +142,7 @@ void gctl::callink_magnetic_para_earth_sph(array<mag_tetrahedron> &in_tet, array
 		mag_z.y = cos(I)*cos(A);
 		mag_z.z = -1.0*sin(I);
 
-		s = in_tet[i].center().c2s();
+		s = c2s(in_tet[i].center());
 		// magnetic susceptibility is taken as one here
 		// rotate the local coordinate system to the regular status
 		out_para[i].B = field_tense * mag_z.rotate((90.0 - s.lat)*GCTL_Pi/180.0, 0.0, (90.0 + s.lon)*GCTL_Pi/180.0).normal();
@@ -231,7 +231,7 @@ gctl::point3dc gctl::magkernel_single(const gctl::mag_tetrahedron &a_ele, const
 	else R = transform_matrix(a_op);
 
 	gctl::magtet_para* gp = a_ele.att;
-	gctl::point3dc pc = a_op.s2c();
+	gctl::point3dc pc = s2c(a_op);
 	int *v_order = a_ele.vec_order;
 
 	for (f = 0; f < 4; f++)
diff --git a/lib/potential/mkernel_tetrahedron.h b/lib/potential/mkernel_tetrahedron.h
index 90c7e2b..4886fca 100644
--- a/lib/potential/mkernel_tetrahedron.h
+++ b/lib/potential/mkernel_tetrahedron.h
@@ -29,6 +29,8 @@
 #define _GCTL_MAG_KERNEL_TETRAHEDRON_H
 
 #include "gm_data.h"
+#include "gctl/poly/tetrahedron.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/mkernel_tetrahedron_Ren2017.cpp b/lib/potential/mkernel_tetrahedron_Ren2017.cpp
index e9c9774..d8982a1 100644
--- a/lib/potential/mkernel_tetrahedron_Ren2017.cpp
+++ b/lib/potential/mkernel_tetrahedron_Ren2017.cpp
@@ -148,7 +148,7 @@ void gctl::callink_magnetic_para_earth_sph(array<magtet_ren17> &in_tet, array<ma
 		mag_z.y = cos(I)*cos(A);
 		mag_z.z = -1.0*sin(I);
 
-		s = in_tet[i].center().c2s();
+		s = c2s(in_tet[i].center());
 		// magnetic susceptibility is taken as one here
 		// rotate the local coordinate system to the regular status
 		mag_z = field_tense * mag_z.rotate((90.0 - s.lat)*M_PI/180.0, 0.0, (90.0 + s.lon)*M_PI/180.0).normal();
@@ -203,7 +203,7 @@ void gctl::callink_magnetic_para_earth_sph(magtet_ren17 &in_tet, magtet_para_ren
 	mag_z.y = cos(I)*cos(A);
 	mag_z.z = -1.0*sin(I);
 
-	s = in_tet.center().c2s();
+	s = c2s(in_tet.center());
 	// magnetic susceptibility is taken as one here
 	// rotate the local coordinate system to the regular status
 	mag_z = field_tense * mag_z.rotate((90.0 - s.lat)*M_PI/180.0, 0.0, (90.0 + s.lon)*M_PI/180.0).normal();
@@ -362,7 +362,7 @@ void gctl::magkernel(matrix<point3dc> &out_kernel, const array<magtet_ren17> &el
 #pragma omp parallel for private (j, obsp_c) schedule(guided)
 		for (j = 0; j < e_size; j++)
 		{
-			obsp_c = obsp[i].s2c();
+			obsp_c = s2c(obsp[i]);
 			out_kernel[i][j] = magkernel_tetrahedron_gradient_sig(ele[j], obsp_c);
 		}
 	}
@@ -411,7 +411,7 @@ void gctl::magkernel(matrix<tensor> &out_kernel, const array<magtet_ren17> &ele,
 #pragma omp parallel for private (j, obsp_c) schedule(guided)
 		for (j = 0; j < e_size; j++)
 		{
-			obsp_c = obsp[i].s2c();
+			obsp_c = s2c(obsp[i]);
 			out_kernel[i][j] = magkernel_tetrahedron_tensor_sig(ele[j], obsp_c);
 		}
 	}
@@ -461,7 +461,7 @@ gctl::point3dc gctl::magkernel_single(const magtet_ren17 &ele, const point3ds &o
 	R[2][1] = cos((2.0+obsp.lon/180.0)*M_PI);
 	R[2][2] = 0.0;
 
-	point3dc obsp_c = obsp.s2c();
+	point3dc obsp_c = s2c(obsp);
 	point3dc out_k = magkernel_tetrahedron_gradient_sig(ele, obsp_c);
 
 	out_k = R * out_k;
@@ -634,7 +634,7 @@ void gctl::magobser(array<point3dc> &out_obs, const array<magtet_ren17> &ele, co
 #pragma omp parallel for private (i, obsp_c) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsp_c = obsp[i].s2c();
+			obsp_c = s2c(obsp[i]);
 			out_obs[i] = out_obs[i] + sus[j] * magkernel_tetrahedron_gradient_sig(ele[j], obsp_c);
 		}
 	}
@@ -680,7 +680,7 @@ void gctl::magobser(array<tensor> &out_obs, const array<magtet_ren17> &ele, cons
 #pragma omp parallel for private (i, obsp_c) schedule(guided)
 		for (i = 0; i < o_size; i++)
 		{
-			obsp_c = obsp[i].s2c();
+			obsp_c = s2c(obsp[i]);
 			out_obs[i] = out_obs[i] + sus[j] * magkernel_tetrahedron_tensor_sig(ele[j], obsp_c);
 		}
 	}
diff --git a/lib/potential/mkernel_tetrahedron_Ren2017.h b/lib/potential/mkernel_tetrahedron_Ren2017.h
index e08307a..4b33b60 100644
--- a/lib/potential/mkernel_tetrahedron_Ren2017.h
+++ b/lib/potential/mkernel_tetrahedron_Ren2017.h
@@ -29,6 +29,8 @@
 #define _GCTL_MAG_KERNEL_TETRAHEDRON_REN2017_H
 
 #include "gm_data.h"
+#include "gctl/poly/tetrahedron.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/mkernel_triangle.cpp b/lib/potential/mkernel_triangle.cpp
index f0cbd49..7af12cb 100644
--- a/lib/potential/mkernel_triangle.cpp
+++ b/lib/potential/mkernel_triangle.cpp
@@ -137,7 +137,7 @@ void gctl::callink_magnetic_para_earth_sph(array<mag_triangle> &in_tri, array<ma
 		mag_z.y = cos(I)*cos(A);
 		mag_z.z = -1.0*sin(I);
 
-		s = in_tri[i].center().c2s();
+		s = c2s(in_tri[i].center());
 		// magnetic susceptibility is taken as one here
 		// rotate the local coordinate system to the regular status
 		out_para[i].B = field_tense * mag_z.rotate((90.0 - s.lat)*GCTL_Pi/180.0, 0.0, (90.0 + s.lon)*GCTL_Pi/180.0).normal();
@@ -218,7 +218,7 @@ gctl::point3dc gctl::magkernel_single(const mag_triangle &a_ele, const point3ds
 	else R = transform_matrix(a_op);
 
 	gctl::magtri_para *gp = a_ele.att;
-	gctl::point3dc pc = a_op.s2c();
+	gctl::point3dc pc = s2c(a_op);
 
 	r_ijk[0] = *a_ele.vert[0] - pc;
 	r_ijk[1] = *a_ele.vert[1] - pc;
diff --git a/lib/potential/mkernel_triangle.h b/lib/potential/mkernel_triangle.h
index b855e5f..c29a869 100644
--- a/lib/potential/mkernel_triangle.h
+++ b/lib/potential/mkernel_triangle.h
@@ -29,6 +29,8 @@
 #define _GCTL_MAG_KERNEL_TRIANGLE_H
 
 #include "gm_data.h"
+#include "gctl/poly/triangle.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/lib/potential/mkernel_tricone.cpp b/lib/potential/mkernel_tricone.cpp
index c6bf78b..b3061be 100644
--- a/lib/potential/mkernel_tricone.cpp
+++ b/lib/potential/mkernel_tricone.cpp
@@ -97,7 +97,7 @@ void gctl::callink_magnetic_para_earth_sph(array<magcone> &in_tet, array<magcone
 		mag_z.z = -1.0*sin(I);
 
 		c = 1.0/3.0*(*in_tet[i].vert[0] + *in_tet[i].vert[1] + *in_tet[i].vert[2]);
-		s = c.c2s();
+		s = c2s(c);
 		// magnetic susceptibility is taken as one here
 		// rotate the local coordinate system to the regular status
 		out_para[i].B = field_tense * mag_z.rotate((90.0 - s.lat)*GCTL_Pi/180.0, 0.0, (90.0 + s.lon)*GCTL_Pi/180.0).normal();
@@ -138,7 +138,7 @@ gctl::point3dc gctl::magkernel_single(const magcone &a_ele, const point3ds &a_op
 	else R = transform_matrix(a_op);
 
 	gctl::magcone_para* gp = a_ele.att;
-	gctl::point3dc pc = a_op.s2c();
+	gctl::point3dc pc = s2c(a_op);
 
 	for (f = 0; f < 4; f++)
 	{
@@ -278,7 +278,7 @@ void gctl::magkernel(spmat<double> &kernel, const array<magcone> &top_ele, const
 		for (j = 0; j < e_size; j++)
 		{
 			cen = 1.0/3.0*(*top_ele[j].vert[0] + *top_ele[j].vert[1] + *top_ele[j].vert[2]);
-			if (geometry3d::angle(obsp[i].s2c(), cen) < cut_angle*GCTL_Pi/180.0)
+			if (geometry3d::angle(s2c(obsp[i]), cen) < cut_angle*GCTL_Pi/180.0)
 			{
 				tmp_plt.r_id = i;
 				tmp_plt.c_id = j;
@@ -300,7 +300,7 @@ void gctl::magkernel(spmat<double> &kernel, const array<magcone> &top_ele, const
 		for (j = 0; j < e_size; j++)
 		{
 			cen = 1.0/3.0*(*top_ele[j].vert[0] + *top_ele[j].vert[1] + *top_ele[j].vert[2]);
-			if (geometry3d::angle(obsp[i].s2c(), cen) < cut_angle*GCTL_Pi/180.0)
+			if (geometry3d::angle(s2c(obsp[i]), cen) < cut_angle*GCTL_Pi/180.0)
 			{
 				mag_b = magkernel_single(top_ele[j], obsp[i], Rs.get(i));
 				if (comp_type == Bx) triplts[tri_idx[j + i*e_size]].val = mag_b.y;
@@ -319,7 +319,7 @@ void gctl::magkernel(spmat<double> &kernel, const array<magcone> &top_ele, const
 		for (j = 0; j < e_size; j++)
 		{
 			cen = 1.0/3.0*(*btm_ele[j].vert[0] + *btm_ele[j].vert[1] + *btm_ele[j].vert[2]);
-			if (geometry3d::angle(obsp[i].s2c(), cen) < cut_angle*GCTL_Pi/180.0)
+			if (geometry3d::angle(s2c(obsp[i]), cen) < cut_angle*GCTL_Pi/180.0)
 			{
 				mag_b = magkernel_single(btm_ele[j], obsp[i], Rs.get(i));
 				if (comp_type == Bx) triplts[tri_idx[j + i*e_size]].val -= mag_b.y;
diff --git a/lib/potential/mkernel_tricone.h b/lib/potential/mkernel_tricone.h
index 1d99651..33036ba 100644
--- a/lib/potential/mkernel_tricone.h
+++ b/lib/potential/mkernel_tricone.h
@@ -29,6 +29,9 @@
 #define _GCTL_MAG_KERNEL_TRICONE_H
 
 #include "gm_data.h"
+#include "gctl/poly/tri_cone.h"
+#include "gctl/utility/progress_bar.h"
+#include "gctl/math/geometry3d.h"
 
 namespace gctl
 {
diff --git a/lib/potential/mkernel_tricone_Ren2017.cpp b/lib/potential/mkernel_tricone_Ren2017.cpp
index bccc695..27ce86c 100644
--- a/lib/potential/mkernel_tricone_Ren2017.cpp
+++ b/lib/potential/mkernel_tricone_Ren2017.cpp
@@ -107,7 +107,7 @@ void gctl::callink_magnetic_para_earth_sph(array<magcone_ren17> &in_cone, array<
 		mag_z.z = -1.0*sin(I);
 
         c = 1.0/3.0*(*in_cone[i].vert[0] + *in_cone[i].vert[1] + *in_cone[i].vert[2]);
-		s = c.c2s();
+		s = c2s(c);
 		// magnetic susceptibility is taken as one here
 		// rotate the local coordinate system to the regular status
 		mag_z = field_tense * mag_z.rotate((90.0 - s.lat)*M_PI/180.0, 0.0, (90.0 + s.lon)*M_PI/180.0).normal();
@@ -151,7 +151,7 @@ gctl::point3dc gctl::magkernel_single(const magcone_ren17 &a_ele, const point3ds
 	else R = transform_matrix(a_op);
 
 	// get the observation site in the local coordinates
-	gctl::point3dc site = a_op.s2c();
+	gctl::point3dc site = s2c(a_op);
 	gctl::point3dc out_grad(0.0, 0.0, 0.0);
 	for (int f = 0; f < 4; ++f)
 	{
@@ -238,7 +238,7 @@ gctl::tensor gctl::magkernel_single_tensor(const magcone_ren17 &a_ele, const poi
     R_T = R.transpose();
 
     // get the observation site in the local coordinates
-	gctl::point3dc site = a_op.s2c();
+	gctl::point3dc site = s2c(a_op);
 	gctl::tensor out_tensor(0.0);
 	for (int f = 0; f < 4; ++f)
 	{
@@ -435,7 +435,7 @@ void gctl::magkernel(spmat<double> &kernel, const array<magcone_ren17> &top_ele,
 		for (j = 0; j < e_size; j++)
 		{
 			cen = 1.0/3.0*(*top_ele[j].vert[0] + *top_ele[j].vert[1] + *top_ele[j].vert[2]);
-			if (geometry3d::angle(obsp[i].s2c(), cen) < cut_angle*GCTL_Pi/180.0)
+			if (geometry3d::angle(s2c(obsp[i]), cen) < cut_angle*GCTL_Pi/180.0)
 			{
 				tmp_plt.r_id = i;
 				tmp_plt.c_id = j;
@@ -457,7 +457,7 @@ void gctl::magkernel(spmat<double> &kernel, const array<magcone_ren17> &top_ele,
 		for (j = 0; j < e_size; j++)
 		{
 			cen = 1.0/3.0*(*top_ele[j].vert[0] + *top_ele[j].vert[1] + *top_ele[j].vert[2]);
-			if (geometry3d::angle(obsp[i].s2c(), cen) < cut_angle*GCTL_Pi/180.0)
+			if (geometry3d::angle(s2c(obsp[i]), cen) < cut_angle*GCTL_Pi/180.0)
 			{
 				mag_b = magkernel_single(top_ele[j], obsp[i], Rs.get(i));
 				if (comp_type == Bx) triplts[tri_idx[j + i*e_size]].val = mag_b.y;
@@ -476,7 +476,7 @@ void gctl::magkernel(spmat<double> &kernel, const array<magcone_ren17> &top_ele,
 		for (j = 0; j < e_size; j++)
 		{
 			cen = 1.0/3.0*(*btm_ele[j].vert[0] + *btm_ele[j].vert[1] + *btm_ele[j].vert[2]);
-			if (geometry3d::angle(obsp[i].s2c(), cen) < cut_angle*GCTL_Pi/180.0)
+			if (geometry3d::angle(s2c(obsp[i]), cen) < cut_angle*GCTL_Pi/180.0)
 			{
 				mag_b = magkernel_single(btm_ele[j], obsp[i], Rs.get(i));
 				if (comp_type == Bx) triplts[tri_idx[j + i*e_size]].val -= mag_b.y;
diff --git a/lib/potential/mkernel_tricone_Ren2017.h b/lib/potential/mkernel_tricone_Ren2017.h
index e5595d7..7ea51d6 100644
--- a/lib/potential/mkernel_tricone_Ren2017.h
+++ b/lib/potential/mkernel_tricone_Ren2017.h
@@ -29,6 +29,9 @@
 #define _GCTL_MAG_KERNEL_TRICONE_REN2017_H
 
 #include "gm_data.h"
+#include "gctl/poly/tri_cone.h"
+#include "gctl/math/geometry3d.h"
+#include "gctl/utility/progress_bar.h"
 
 namespace gctl
 {
diff --git a/tool/gridmanager-potential/gridmanager-potential.cpp b/tool/gridmanager-potential/gridmanager-potential.cpp
index 2d9b9fe..246cb16 100644
--- a/tool/gridmanager-potential/gridmanager-potential.cpp
+++ b/tool/gridmanager-potential/gridmanager-potential.cpp
@@ -438,7 +438,7 @@ void save_text(const std::vector<std::string> &cmd_units)
 
 void data_cloud(const std::vector<std::string> &cmd_units)
 {
-    // data-cloud \<new-data-name\> node|cell \<data-could-file\> \<search-x\> \<search-y\> \<search-deg\> [\<text_descriptor\>]
+    // data-cloud \<new-data-name\> node|cell \<data-could-file\> \<search-x\> \<search-y\> \<search-deg\>
     if (cmd_units.size() < 7) throw std::runtime_error("data-cloud: insufficient parameters.");
 
     gctl::array<std::string> copy_str(7, "null");
@@ -452,33 +452,15 @@ void data_cloud(const std::vector<std::string> &cmd_units)
     else if (copy_str[1] == "cell") d_type = ElemData;
     else throw std::runtime_error("open-surfer: invalid grid data type.");
 
-    text_descriptor desc;
-    desc.file_name_ = copy_str[2];
-    desc.file_ext_ = ".txt";
-    desc.col_str_ = "0,1,2";
-    desc.delimiter_ = ' ';
-    desc.att_sym_ = '#';
-    desc.head_num_ = 0;
-    if (copy_str[6] != "null")
-    {
-        parse_string_to_value(copy_str[6], '/', true, desc.col_str_, 
-            desc.delimiter_, desc.att_sym_, desc.head_num_);
-    }
+    geodsv_io text_in;
+    text_in.load_text(copy_str[2]);
 
-    std::vector<double> posix_vec, posiy_vec, data_vec;
-    read_text2vectors(desc, posix_vec, posiy_vec, data_vec);
+    array<point2dc> posi_arr;
+    _1d_array data_vec;
+    text_in.get_column_point2dc(posi_arr, 0, 1);
+    text_in.get_column(data_vec, 2);
 
-    array<point2dc> posi_arr(posix_vec.size());
-    array<double> posi_val;
-
-    posi_val.input(data_vec);
-    for (size_t i = 0; i < posi_arr.size(); i++)
-    {
-        posi_arr[i].x = posix_vec[i];
-        posi_arr[i].y = posiy_vec[i];
-    }
-
-    rg.load_data_cloud(posi_arr, posi_val, atof(copy_str[3].c_str()), atof(copy_str[4].c_str()), atof(copy_str[5].c_str()), copy_str[0], d_type);
+    rg.load_data_cloud(posi_arr, data_vec, atof(copy_str[3].c_str()), atof(copy_str[4].c_str()), atof(copy_str[5].c_str()), copy_str[0], d_type);
     return;
 }
 
@@ -721,29 +703,9 @@ void get_profile(const std::vector<std::string> &cmd_units)
     }
     else // File exist
     {
-        text_descriptor desc;
-        desc.file_name_ = copy_str[2];
-        desc.file_ext_ = ".txt";
-        desc.att_sym_ = '#';
-        desc.col_str_ = "0,1";
-        desc.delimiter_ = ' ';
-        desc.head_num_ = 0;
-
-        if (copy_str[3] != "null")
-        {
-            gctl::parse_string_to_value(copy_str[3], '/', true, desc.col_str_, desc.delimiter_, 
-                desc.att_sym_, desc.head_num_);
-        }
-        
-        std::vector<double> xs, ys;
-        gctl::read_text2vectors(desc, xs, ys);
-
-        xys.resize(xs.size());
-        for (size_t i = 0; i < xys.size(); i++)
-        {
-            xys[i].x = xs[i];
-            xys[i].y = ys[i];
-        }
+        geodsv_io fio;
+        fio.load_text(copy_str[2]);
+        fio.get_column_point2dc(xys, 0, 1);
 
         rg.extract_points(copy_str[0], xys, p_data);
     }
diff --git a/tool/gridmanager-potential/readme_gridmanager_potential.md b/tool/gridmanager-potential/readme_gridmanager_potential.md
index 3256a12..4c6f266 100644
--- a/tool/gridmanager-potential/readme_gridmanager_potential.md
+++ b/tool/gridmanager-potential/readme_gridmanager_potential.md
@@ -22,8 +22,8 @@ Mathematic expresstions could be used to specify the grid ranges.
 4. `save gmsh <file>` Save the grid using the Gmsh legacy format. This command will write all data that are allowed for outputing.
 5. `save text <file>` Save the grid data to text file.
 
-#### cloud \<new-data-name\> node|cell \<data-could-file\> \<search-x\> \<search-y\> \<search-deg\>  [\<text_descriptor\>]
-Import a randomly distributed data could (namely a xyz data). Note that a grid must exist before the use this command. 'node' or 'cell' indicates whether the input could data should be node or cell registed. \<data-could-file\> is the input data file. \<search-x\>,\<search-y\> and \<search-deg\> defines an oval of which the command is used to interpolate the could data to grid points. Additional options for reading the \<data-could-file\> could be given by the [\<text_descriptor\>] argument which has a format of \<order_str\>/\<delimiter\>/\<annotate\>/\<head_record\>. For example 0,1,2/,/#/0 means that the intput data could is stored int the first three columns separated by commas. The file has no head records and any line starts with '#' is an annotation.
+#### cloud \<new-data-name\> node|cell \<data-could-file\> \<search-x\> \<search-y\> \<search-deg\>
+Import a randomly distributed data could (namely a xyz data). Note that a grid must exist before the use this command. 'node' or 'cell' indicates whether the input could data should be node or cell registed. \<data-could-file\> is the input data file. \<search-x\>,\<search-y\> and \<search-deg\> defines an oval of which the command is used to interpolate the could data to grid points.
 
 #### gradient \<data-name\> \<new-data-name\> dx|dy \<order\>
 Calculate directional gradient(s) of the selected data. The new gradient data will have the same