diff --git a/homework4/starting_point/.idea/workspace.xml b/homework4/starting_point/.idea/workspace.xml
index 0a57bb3..75ae0ed 100644
--- a/homework4/starting_point/.idea/workspace.xml
+++ b/homework4/starting_point/.idea/workspace.xml
@@ -1,448 +1,442 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CMakeRunConfigurationManager" shouldGenerate="true" shouldDeleteObsolete="true" buildAllGenerated="true">
     <generated>
       <config projectName="Particles" targetName="test_kepler" />
       <config projectName="Particles" targetName="part" />
       <config projectName="Particles" targetName="test_fft" />
       <config projectName="Particles" targetName="particles" />
     </generated>
   </component>
   <component name="CMakeSettings">
     <configurations>
       <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
     </configurations>
   </component>
   <component name="ChangeListManager">
     <list default="true" id="b4e9d45a-71a7-4f96-94b1-4bcb4ac5e568" name="Default Changelist" comment="">
       <change beforePath="$PROJECT_DIR$/py_part.cpp" beforeDir="false" afterPath="$PROJECT_DIR$/py_part.cpp" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/cmake-build-debug/" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
   <component name="ExecutionTargetManager" SELECTED_TARGET="CMakeBuildProfile:Debug" />
   <component name="FUSProjectUsageTrigger">
     <session id="-631948752">
       <usages-collector id="statistics.lifecycle.project">
         <counts>
           <entry key="project.open.time.4" value="1" />
           <entry key="project.opened" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.open">
         <counts>
           <entry key="cc" value="13" />
           <entry key="cpp" value="1" />
           <entry key="hh" value="14" />
           <entry key="txt" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.open">
         <counts>
           <entry key="CMakeLists.txt" value="1" />
           <entry key="ObjectiveC" value="28" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.edit">
         <counts>
-          <entry key="cpp" value="379" />
+          <entry key="cpp" value="615" />
           <entry key="txt" value="201" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.edit">
         <counts>
           <entry key="CMakeLists.txt" value="201" />
-          <entry key="ObjectiveC" value="379" />
+          <entry key="ObjectiveC" value="615" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.cidr.testingFrameworks.usages">
         <counts>
           <entry key="Google Test" value="3" />
         </counts>
       </usages-collector>
     </session>
   </component>
   <component name="FileColors">
     <fileColor scope="All" color="ffffff" />
   </component>
   <component name="FileEditorManager">
     <leaf>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/CMakeLists.txt">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="232">
               <caret line="96" column="41" selection-start-line="96" selection-start-column="41" selection-end-line="96" selection-end-column="41" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/py_part.cpp">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="300">
-              <caret line="52" column="4" lean-forward="true" selection-start-line="52" selection-start-column="4" selection-end-line="52" selection-end-column="4" />
-              <folding>
-                <element signature="e#0#21#0" expanded="true" />
-              </folding>
+            <state relative-caret-position="105">
+              <caret line="7" column="32" selection-start-line="7" selection-start-column="32" selection-end-line="7" selection-end-column="32" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/csv_writer.hh">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="165">
               <caret line="12" column="12" selection-start-line="12" selection-start-column="12" selection-end-line="12" selection-end-column="30" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/system_evolution.cc">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="-29">
               <folding>
                 <element signature="e#0#30#0" expanded="true" />
               </folding>
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/system_evolution.hh">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="151">
               <caret line="23" column="37" lean-forward="true" selection-start-line="23" selection-start-column="37" selection-end-line="23" selection-end-column="37" />
             </state>
           </provider>
         </entry>
       </file>
     </leaf>
   </component>
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/../.." />
   </component>
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
         <option value="$PROJECT_DIR$/CMakeLists.txt" />
         <option value="$PROJECT_DIR$/py_part.cpp" />
       </list>
     </option>
   </component>
   <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
   <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER" />
   <component name="JsGulpfileManager">
     <detection-done>true</detection-done>
     <sorting>DEFINITION_ORDER</sorting>
   </component>
   <component name="ProjectFrameBounds">
     <option name="x" value="1" />
     <option name="y" value="23" />
     <option name="width" value="1269" />
     <option name="height" value="716" />
   </component>
   <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
   <component name="ProjectView">
     <navigator proportions="" version="1">
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
       <pane id="Scope" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
             <path>
               <item name="Particles" type="b2602c69:ProjectViewProjectNode" />
               <item name="starting_point" type="462c0819:PsiDirectoryNode" />
             </path>
           </expand>
           <select />
         </subPane>
       </pane>
     </panes>
   </component>
   <component name="PropertiesComponent">
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
     <property name="nodejs_npm_path_reset_for_default_project" value="true" />
     <property name="settings.editor.selected.configurable" value="editor.preferences.import" />
   </component>
   <component name="RunDashboard">
     <option name="ruleStates">
       <list>
         <RuleState>
           <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
         </RuleState>
         <RuleState>
           <option name="name" value="StatusDashboardGroupingRule" />
         </RuleState>
       </list>
     </option>
   </component>
   <component name="RunManager" selected="Application.particles">
     <configuration name="test_fft" type="CMakeGoogleTestRunConfigurationType" factoryName="Google Test" PASS_PARENT_ENVS_2="true" PROJECT_NAME="Particles" TARGET_NAME="test_fft" CONFIG_NAME="Debug" RUN_TARGET_PROJECT_NAME="Particles" RUN_TARGET_NAME="test_fft" TEST_MODE="SUITE_TEST">
       <method v="2">
         <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
       </method>
     </configuration>
     <configuration name="test_kepler" type="CMakeGoogleTestRunConfigurationType" factoryName="Google Test" PASS_PARENT_ENVS_2="true" PROJECT_NAME="Particles" TARGET_NAME="test_kepler" CONFIG_NAME="Debug" RUN_TARGET_PROJECT_NAME="Particles" RUN_TARGET_NAME="test_kepler" TEST_MODE="SUITE_TEST">
       <method v="2">
         <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
       </method>
     </configuration>
     <configuration name="Build All" type="CMakeRunConfiguration" factoryName="Application" PASS_PARENT_ENVS_2="true" CONFIG_NAME="Debug" EXPLICIT_BUILD_TARGET_NAME="all">
       <method v="2">
         <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
       </method>
     </configuration>
     <configuration name="part" type="CMakeRunConfiguration" factoryName="Application" PASS_PARENT_ENVS_2="true" PROJECT_NAME="Particles" TARGET_NAME="part" CONFIG_NAME="Debug">
       <method v="2">
         <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
       </method>
     </configuration>
     <configuration name="particles" type="CMakeRunConfiguration" factoryName="Application" PASS_PARENT_ENVS_2="true" PROJECT_NAME="Particles" TARGET_NAME="particles" CONFIG_NAME="Debug" RUN_TARGET_PROJECT_NAME="Particles" RUN_TARGET_NAME="particles">
       <method v="2">
         <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
       </method>
     </configuration>
     <list>
       <item itemvalue="Application.Build All" />
       <item itemvalue="Application.part" />
       <item itemvalue="Application.particles" />
       <item itemvalue="Google Test.test_fft" />
       <item itemvalue="Google Test.test_kepler" />
     </list>
   </component>
   <component name="SvnConfiguration">
     <configuration />
   </component>
   <component name="TaskManager">
     <task active="true" id="Default" summary="Default task">
       <changelist id="b4e9d45a-71a7-4f96-94b1-4bcb4ac5e568" name="Default Changelist" comment="" />
       <created>1545641844292</created>
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1545641844292</updated>
       <workItem from="1545641847884" duration="14534000" />
     </task>
     <servers />
   </component>
   <component name="TestHistory">
     <history-entry file="test_fft - 2018.12.24 at 10h 50m 19s.xml">
       <configuration name="test_fft" configurationId="CMakeGoogleTestRunConfigurationType" />
     </history-entry>
     <history-entry file="test_fft - 2018.12.24 at 10h 59m 02s.xml">
       <configuration name="test_fft" configurationId="CMakeGoogleTestRunConfigurationType" />
     </history-entry>
     <history-entry file="test_fft - 2018.12.24 at 11h 03m 49s.xml">
       <configuration name="test_fft" configurationId="CMakeGoogleTestRunConfigurationType" />
     </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="21106000" />
+    <option name="totallyTimeSpent" value="21490000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="1" y="23" width="1269" height="716" extended-state="0" />
     <editor active="true" />
     <layout>
       <window_info id="Favorites" side_tool="true" />
       <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.24938875" />
       <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
       <window_info anchor="bottom" id="Database Changes" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" />
       <window_info anchor="bottom" id="Messages" weight="0.32852563" />
       <window_info anchor="bottom" id="Terminal" />
       <window_info anchor="bottom" id="Event Log" side_tool="true" />
       <window_info anchor="bottom" id="CMake" weight="0.32852563" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" />
       <window_info anchor="bottom" id="Run" order="2" visible="true" weight="0.32852563" />
       <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
       <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
       <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
       <window_info anchor="bottom" id="TODO" order="6" />
       <window_info anchor="right" id="Database" />
       <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
       <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
       <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
     </layout>
   </component>
   <component name="TypeScriptGeneratedFilesManager">
     <option name="version" value="1" />
   </component>
   <component name="VcsContentAnnotationSettings">
     <option name="myLimit" value="2678400000" />
   </component>
   <component name="editorHistoryManager">
     <entry file="file://$PROJECT_DIR$/test_fft.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="375">
           <caret line="25" column="35" selection-start-line="25" selection-start-column="35" selection-end-line="25" selection-end-column="35" />
           <folding>
             <element signature="e#0#33#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/compute_temperature.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state>
           <folding>
             <element signature="e#0#33#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/fft.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="375">
           <caret line="25" column="1" selection-start-line="25" selection-start-column="1" selection-end-line="25" selection-end-column="1" />
           <folding>
             <element signature="e#91#111#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/compute_temperature.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="-104" />
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/particles_factory_interface.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state>
           <folding>
             <element signature="e#0#41#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/planets_factory.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="-423">
           <folding>
             <element signature="e#0#29#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/planets_factory.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="-35" />
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/particles_factory_interface.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="257">
           <caret line="26" column="9" lean-forward="true" selection-start-line="26" selection-start-column="9" selection-end-line="26" selection-end-column="34" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/CMakeLists.txt">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="232">
           <caret line="96" column="41" selection-start-line="96" selection-start-column="41" selection-end-line="96" selection-end-column="41" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/csv_writer.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="-51">
           <folding>
             <element signature="e#0#24#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/material_points_factory.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="311">
           <caret line="39" lean-forward="true" selection-start-line="39" selection-end-line="39" />
           <folding>
             <element signature="e#1200#1215#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/material_points_factory.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="33">
           <caret line="29" lean-forward="true" selection-start-line="29" selection-end-line="29" selection-end-column="16" />
           <folding>
             <element signature="e#0#37#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/system_evolution.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="-29">
           <folding>
             <element signature="e#0#30#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/ping_pong_balls_factory.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="58">
           <caret line="9" column="6" lean-forward="true" selection-start-line="9" selection-start-column="6" selection-end-line="9" selection-end-column="26" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/main.cc">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="321">
           <caret line="58" column="25" selection-start-line="58" selection-start-column="25" selection-end-line="58" selection-end-column="25" />
           <folding>
             <element signature="e#0#29#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/system_evolution.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="151">
           <caret line="23" column="37" lean-forward="true" selection-start-line="23" selection-start-column="37" selection-end-line="23" selection-end-column="37" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/csv_writer.hh">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="165">
           <caret line="12" column="12" selection-start-line="12" selection-start-column="12" selection-end-line="12" selection-end-column="30" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/py_part.cpp">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="300">
-          <caret line="52" column="4" lean-forward="true" selection-start-line="52" selection-start-column="4" selection-end-line="52" selection-end-column="4" />
-          <folding>
-            <element signature="e#0#21#0" expanded="true" />
-          </folding>
+        <state relative-caret-position="105">
+          <caret line="7" column="32" selection-start-line="7" selection-start-column="32" selection-end-line="7" selection-end-column="32" />
         </state>
       </provider>
     </entry>
   </component>
   <component name="masterDetails">
     <states>
       <state key="ScopeChooserConfigurable.UI">
         <settings>
           <splitter-proportions>
             <option name="proportions">
               <list>
                 <option value="0.2" />
               </list>
             </option>
           </splitter-proportions>
         </settings>
       </state>
     </states>
   </component>
 </project>
\ No newline at end of file
diff --git a/homework4/starting_point/py_part.cpp b/homework4/starting_point/py_part.cpp
index d818973..9804acd 100644
--- a/homework4/starting_point/py_part.cpp
+++ b/homework4/starting_point/py_part.cpp
@@ -1,56 +1,61 @@
 #include <functional>
 #include <iostream>
 #include <pybind11/pybind11.h>
 #include "planets_factory.hh"
 #include "ping_pong_balls_factory.hh"
 #include "material_points_factory.hh"
 #include "csv_writer.hh"
+#include "compute_temperature.hh"
 
 namespace py = pybind11;
 
 PYBIND11_MODULE(pypart, m) {
     m.doc() = "pybind particle plugin"; // optional docstring
 
     // wrap the class
     py::class_<ParticlesFactoryInterface>(m, "ParticlesFactoryInterface")
             .def("getInstance", &ParticlesFactoryInterface::getInstance,
                     py::return_value_policy::reference);
 
     py::class_<PingPongBallsFactory, ParticlesFactoryInterface>(m, "PingPongBallsFactory")
             .def("getInstance", &PingPongBallsFactory::getInstance,
                     py::return_value_policy::reference)
             .def("createSimulation", &PingPongBallsFactory::createSimulation,
                  py::return_value_policy::reference);
 
     py::class_<PlanetsFactory, ParticlesFactoryInterface>(m, "PlanetsFactory")
             .def("getInstance", &PlanetsFactory::getInstance,
                     py::return_value_policy::reference)
             .def("createSimulation", &PlanetsFactory::createSimulation,
                  py::return_value_policy::reference);
 
     py::class_<MaterialPointsFactory, ParticlesFactoryInterface>(m, "MaterialPointsFactory")
             .def("getInstance", &MaterialPointsFactory::getInstance,
                     py::return_value_policy::reference)
             .def("createSimulation",
                     (SystemEvolution & (MaterialPointsFactory::*)(const std::string &, Real))
                     &MaterialPointsFactory::createSimulation, py::return_value_policy::reference
             )
             .def("createSimulation", py::overload_cast<const std::string&, Real, py::function>
                     (&MaterialPointsFactory::createSimulation<py::function>),
                     py::return_value_policy::reference);
 
     py::class_<SystemEvolution>(m, "SystemEvolution")
             .def("setNSteps", &SystemEvolution::setNSteps)
             .def("setDumpFreq", &SystemEvolution::setDumpFreq)
             .def("evolve", &SystemEvolution::evolve)
             .def("getSystem", &SystemEvolution::getSystem,
                  py::return_value_policy::reference);
 
     py::class_<CsvWriter>(m, "CsvWriter")
             .def(py::init<const std::string&>())
             .def("write", &CsvWriter::write);
 
     py::class_<System>(m, "System");
+
+    //Compute and ComputeTemperature wrappers are not implemented;
+    //only name of the class ComputeTemperature for python script's header
+    py::class_<ComputeTemperature>(m, "ComputeTemperature");
 }