diff --git a/sim-test/rigid-test/cube/config.json b/sim-test/rigid-test/cube/config.json
index 9bf68fb..a8f50b9 100644
--- a/sim-test/rigid-test/cube/config.json
+++ b/sim-test/rigid-test/cube/config.json
@@ -1,6 +1,6 @@
 {
     "material": [1e5, 0.3, 1e3],
-    "mshFilePath": "/home/cflin/Documents/CppField/source/RigidElasticSim/sim-test/rigid-test/cube/cube_9743.msh",
+    "mshFilePath": "/home/cw/opt/StaticSimulation/sim-test/rigid-test/cube/cube_9743.msh",
 
     "DBC": [
         {
diff --git a/sim-test/rigid-test/rearAxle-mod/config.json b/sim-test/rigid-test/rearAxle-mod/config.json
index 9b39242..4e98b13 100644
--- a/sim-test/rigid-test/rearAxle-mod/config.json
+++ b/sim-test/rigid-test/rearAxle-mod/config.json
@@ -1,6 +1,6 @@
 {
     "material": [1e5, 0.3, 1e3],
-    "mshFilePath": "/home/cflin/Documents/CppField/source/RigidElasticSim/sim-test/rigid-test/rearAxle-mod/rearAxle-mod_.msh",
+    "mshFilePath": "/home/cw/opt/StaticSimulation/sim-test/rigid-test/rearAxle-mod/rearAxle-mod_.msh",
 
     "DBC": [
         {
diff --git a/sim-test/rigid-test/rocker-arm/config.json b/sim-test/rigid-test/rocker-arm/config.json
index b90f702..2be5db7 100644
--- a/sim-test/rigid-test/rocker-arm/config.json
+++ b/sim-test/rigid-test/rocker-arm/config.json
@@ -1,6 +1,6 @@
 {
     "material": [1e5, 0.3, 1e3],
-    "mshFilePath": "/home/cflin/Documents/CppField/source/RigidElasticSim/sim-test/rigid-test/rocker-arm/rocker-arm_.msh",
+    "mshFilePath": "/home/cw/opt/StaticSimulation/sim-test/rigid-test/rocker-arm/rocker-arm_.msh",
 
     "DBC": [
         {
diff --git a/src/static_sim/StaticSim.h b/src/static_sim/StaticSim.h
index 2480935..8b77b5c 100644
--- a/src/static_sim/StaticSim.h
+++ b/src/static_sim/StaticSim.h
@@ -25,7 +25,10 @@
 
 #include "BoundaryConditions.hpp"
 #include "Config.hpp"
+#include "Utils.hpp"
+
 #include <igl/read_triangle_mesh.h>
+#include <igl/write_triangle_mesh.h>
 
 namespace ssim {
     class StaticSimGUI;
@@ -85,19 +88,24 @@ namespace ssim {
         /// \param v_is_extract if (v_is_extract[i]){ extract the target i; }
         /// \param extract_coord_flg
         void ExtractTarget(std::string save_dir,std::vector<bool> v_is_extract,bool extract_coord_flg){
-            if(extract_coord_flg){
-                // TODO: add coordinate cols
-                spdlog::info("extract {}","coordinate");
+            if(extract_coord_flg) {
+                Eigen::MatrixXd V_surf(SVI.size(), 3);
+                for (int svI = 0; svI < SVI.size(); ++svI) {
+                    int vI = SVI[svI];
+                    Eigen::Vector3d u = U.segment<3>(vI * 3);
+                    V_surf.row(svI) = TV.row(vI) + u.transpose();
+                }
+
+                igl::write_triangle_mesh(save_dir + "/deformed-surf.obj", V_surf, F_surf);
+                spdlog::info("save deformed surface mesh to 'deformed-surf.obj'");
             }
             for(int i=0;i<v_is_extract.size();++i){
                 assert(i<SimTargetOption::Target::ENUM_SIZE);
                 if(v_is_extract[i]){
-                    // TODO: add #target col
-                    spdlog::info("extract {}",i);
+                    Utils::writeMatrix(save_dir + "/" + std::to_string(i) + ".txt", map_target_to_evaluated_[i]);
+                    spdlog::info("extract target {}",i);
                 }
             }
-            // TODO: extract the file
-
         }
 
         Eigen::MatrixXd EvaluateTarget(SimTargetOption::Target target) {
@@ -165,26 +173,6 @@ namespace ssim {
         // Return: 1 x 1
         Eigen::MatrixXd EvaluateCompliance() const;
 
-        void writePntVTK(const std::string &path, const Eigen::MatrixXd &V) {
-            std::ofstream out(path);
-            out << "# vtk DataFile Version 3.0\n"
-                   "Volume Mesh\n"
-                   "ASCII\n"
-                   "DATASET UNSTRUCTURED_GRID" << std::endl;
-            out << "POINTS " << V.rows() << " float" << std::endl;
-            for (int i = 0; i < V.rows(); ++i) {
-                out << std::setprecision(4) << V.row(i).x() << " " << V.row(i).y() << " " << V.row(i).z() << std::endl;
-            }
-            out << "CELLS " << V.rows() << " " << V.rows() * (1 + 1) << std::endl;
-            for (int i = 0; i < V.rows(); ++i) {
-                out << "1 " << i << std::endl;
-            }
-            out << "CELL_TYPES " << V.rows() << std::endl;
-            for (int i = 0; i < V.rows(); ++i) {
-                out << 1 << std::endl;
-            }
-        }
-
     private:
         MeshModel mesh_;
         MaterialProperty material_property_;