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    Dim dir As New On3dVector(1, 0, 0)    
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    Dim axis As New On3dVector(0, 0, 1)
    Dim pnts As New List(Of On3dVector)

    pnts.Add(pos)
    
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                          <X>1911</X>
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                                  <X>1959</X>
                                  <Y>-3241</Y>
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                                  <X>1964.5</X>
                                  <Y>-3231</Y>
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                                  <X>1959</X>
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                                  <X>1964.5</X>
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                                  <X>1994</X>
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                                  <X>2009.5</X>
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                              <W>47</W>
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                              <X>2029.5</X>
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                              <X>1945</X>
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                              <X>1960</X>
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                              <X>1999</X>
                              <Y>-2562</Y>
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                              <X>2026.5</X>
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                              <X>1999</X>
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                              <X>2026.5</X>
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                              <X>2026.5</X>
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                          <X>1964</X>
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                          <X>1989.496</X>
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                          <X>1939</X>
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                          <X>1973</X>
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                              <X>1941</X>
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                              <W>20</W>
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                              <X>1951</X>
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                              <X>1985</X>
                              <Y>-2720</Y>
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                              <X>2012</X>
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                              <X>1985</X>
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                              <X>2012</X>
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                              <W>54</W>
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                          <X>1940</X>
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                          <X>1983</X>
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                              <X>1942</X>
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                              <W>29</W>
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                              <X>1956.5</X>
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                              <X>1995</X>
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                              <X>2010.5</X>
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                          <X>1879</X>
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                          <X>1879.721</X>
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                          <X>1936</X>
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                          <X>2002</X>
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                              <X>1938</X>
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                              <X>1964</X>
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                          <X>1926</X>
                          <Y>-3735</Y>
                          <W>77</W>
                          <H>84</H>
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                          <X>1961</X>
                          <Y>-3693</Y>
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                      <items count="7">
                        <item name="Description" type_name="gh_string" type_code="10">Base box</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">8a4be514-c5dd-48be-b2f0-1cf9b96abbe8</item>
                        <item name="Name" type_name="gh_string" type_code="10">Box</item>
                        <item name="NickName" type_name="gh_string" type_code="10">Box</item>
                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
                        <item name="Source" index="0" type_name="gh_guid" type_code="9">43902697-9c37-4903-9869-f9ad411e4f75</item>
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                      <chunks count="1">
                        <chunk name="Attributes">
                          <items count="2">
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                              <X>1928</X>
                              <Y>-3733</Y>
                              <W>21</W>
                              <H>80</H>
                            </item>
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                              <X>1938.5</X>
                              <Y>-3693</Y>
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                    <chunk name="param_output" index="0">
                      <items count="6">
                        <item name="Description" type_name="gh_string" type_code="10">Box plane</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">2aba7963-652f-47e1-9cc2-24315aeb8fce</item>
                        <item name="Name" type_name="gh_string" type_code="10">Plane</item>
                        <item name="NickName" type_name="gh_string" type_code="10">Plane</item>
                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
                        <item name="SourceCount" type_name="gh_int32" type_code="3">0</item>
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                      <chunks count="1">
                        <chunk name="Attributes">
                          <items count="2">
                            <item name="Bounds" type_name="gh_drawing_rectanglef" type_code="35">
                              <X>1973</X>
                              <Y>-3733</Y>
                              <W>28</W>
                              <H>20</H>
                            </item>
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                              <X>1987</X>
                              <Y>-3723</Y>
                            </item>
                          </items>
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                    <chunk name="param_output" index="1">
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                        <item name="Description" type_name="gh_string" type_code="10">{x} dimension of box</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">f43db928-38e9-4f58-aa26-4b292fdc4a58</item>
                        <item name="Name" type_name="gh_string" type_code="10">X</item>
                        <item name="NickName" type_name="gh_string" type_code="10">X</item>
                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
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                      <chunks count="1">
                        <chunk name="Attributes">
                          <items count="2">
                            <item name="Bounds" type_name="gh_drawing_rectanglef" type_code="35">
                              <X>1973</X>
                              <Y>-3713</Y>
                              <W>28</W>
                              <H>20</H>
                            </item>
                            <item name="Pivot" type_name="gh_drawing_pointf" type_code="31">
                              <X>1987</X>
                              <Y>-3703</Y>
                            </item>
                          </items>
                        </chunk>
                      </chunks>
                    </chunk>
                    <chunk name="param_output" index="2">
                      <items count="6">
                        <item name="Description" type_name="gh_string" type_code="10">{y} dimension of box</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">7020d6e9-c829-4b62-97b6-79641e3273ed</item>
                        <item name="Name" type_name="gh_string" type_code="10">Y</item>
                        <item name="NickName" type_name="gh_string" type_code="10">Y</item>
                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
                        <item name="SourceCount" type_name="gh_int32" type_code="3">0</item>
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                      <chunks count="1">
                        <chunk name="Attributes">
                          <items count="2">
                            <item name="Bounds" type_name="gh_drawing_rectanglef" type_code="35">
                              <X>1973</X>
                              <Y>-3693</Y>
                              <W>28</W>
                              <H>20</H>
                            </item>
                            <item name="Pivot" type_name="gh_drawing_pointf" type_code="31">
                              <X>1987</X>
                              <Y>-3683</Y>
                            </item>
                          </items>
                        </chunk>
                      </chunks>
                    </chunk>
                    <chunk name="param_output" index="3">
                      <items count="6">
                        <item name="Description" type_name="gh_string" type_code="10">{z} dimension of box</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">adaf5b1b-7947-4792-abb7-694902100913</item>
                        <item name="Name" type_name="gh_string" type_code="10">Z</item>
                        <item name="NickName" type_name="gh_string" type_code="10">Z</item>
                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
                        <item name="SourceCount" type_name="gh_int32" type_code="3">0</item>
                      </items>
                      <chunks count="1">
                        <chunk name="Attributes">
                          <items count="2">
                            <item name="Bounds" type_name="gh_drawing_rectanglef" type_code="35">
                              <X>1973</X>
                              <Y>-3673</Y>
                              <W>28</W>
                              <H>20</H>
                            </item>
                            <item name="Pivot" type_name="gh_drawing_pointf" type_code="31">
                              <X>1987</X>
                              <Y>-3663</Y>
                            </item>
                          </items>
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                </chunk>
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            </chunk>
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                <item name="Name" type_name="gh_string" type_code="10">Relative Differences</item>
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                <chunk name="Container">
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                    <item name="Description" type_name="gh_string" type_code="10">Compute relative differences for a list of data</item>
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                    <item name="InstanceGuid" type_name="gh_guid" type_code="9">25ea6639-357d-4334-998c-41880e9b6013</item>
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                  </items>
                  <chunks count="3">
                    <chunk name="Attributes">
                      <items count="2">
                        <item name="Bounds" type_name="gh_drawing_rectanglef" type_code="35">
                          <X>2079</X>
                          <Y>-3681</Y>
                          <W>116</W>
                          <H>28</H>
                        </item>
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                          <X>2126</X>
                          <Y>-3667</Y>
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                        <item name="Access" type_name="gh_int32" type_code="3">1</item>
                        <item name="Description" type_name="gh_string" type_code="10">List of data to operate on (numbers or points or vectors allowed)</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">91ce9143-ca60-42c3-9fe4-57cc14b9e9dd</item>
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                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
                        <item name="Source" index="0" type_name="gh_guid" type_code="9">ece7baa4-a05a-4870-9a7c-56f21a4e0683</item>
                        <item name="Source" index="1" type_name="gh_guid" type_code="9">0b794558-7222-4284-9461-0de8d3145a1b</item>
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                              <X>2081</X>
                              <Y>-3679</Y>
                              <W>33</W>
                              <H>24</H>
                            </item>
                            <item name="Pivot" type_name="gh_drawing_pointf" type_code="31">
                              <X>2097.5</X>
                              <Y>-3667</Y>
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                        <item name="Access" type_name="gh_int32" type_code="3">1</item>
                        <item name="Description" type_name="gh_string" type_code="10">Differences between consecutive items</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">54a6063c-4c83-4aff-91d4-e361ac5db746</item>
                        <item name="Name" type_name="gh_string" type_code="10">Differenced</item>
                        <item name="NickName" type_name="gh_string" type_code="10">Differenced</item>
                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
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                          <items count="2">
                            <item name="Bounds" type_name="gh_drawing_rectanglef" type_code="35">
                              <X>2138</X>
                              <Y>-3679</Y>
                              <W>55</W>
                              <H>24</H>
                            </item>
                            <item name="Pivot" type_name="gh_drawing_pointf" type_code="31">
                              <X>2165.5</X>
                              <Y>-3667</Y>
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                <item name="GUID" type_name="gh_guid" type_code="9">825ea536-aebb-41e9-af32-8baeb2ecb590</item>
                <item name="Name" type_name="gh_string" type_code="10">Deconstruct Domain</item>
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                    <item name="Description" type_name="gh_string" type_code="10">Deconstruct a numeric domain into its component parts.</item>
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                    <item name="InstanceGuid" type_name="gh_guid" type_code="9">5a6ccec3-aea8-473d-ba28-756512c0ae65</item>
                    <item name="Name" type_name="gh_string" type_code="10">Deconstruct Domain</item>
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                  </items>
                  <chunks count="4">
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                      <items count="2">
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                          <X>2016</X>
                          <Y>-3739</Y>
                          <W>92</W>
                          <H>44</H>
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                        <item name="Pivot" type_name="gh_drawing_pointf" type_code="31">
                          <X>2068</X>
                          <Y>-3717</Y>
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                      <items count="7">
                        <item name="Description" type_name="gh_string" type_code="10">Base domain</item>
                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">e84ceb79-c02e-481d-b1ee-06f0617f1cac</item>
                        <item name="Name" type_name="gh_string" type_code="10">Domain</item>
                        <item name="NickName" type_name="gh_string" type_code="10">Domain</item>
                        <item name="Optional" type_name="gh_bool" type_code="1">false</item>
                        <item name="Source" index="0" type_name="gh_guid" type_code="9">7020d6e9-c829-4b62-97b6-79641e3273ed</item>
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                      <chunks count="1">
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                          <items count="2">
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                              <X>2018</X>
                              <Y>-3737</Y>
                              <W>38</W>
                              <H>40</H>
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                              <X>2037</X>
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                        <item name="Description" type_name="gh_string" type_code="10">Start of domain</item>
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                        <item name="Name" type_name="gh_string" type_code="10">Start</item>
                        <item name="NickName" type_name="gh_string" type_code="10">Start</item>
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                              <X>2080</X>
                              <Y>-3737</Y>
                              <W>26</W>
                              <H>20</H>
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                              <X>2093</X>
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                        <item name="InstanceGuid" type_name="gh_guid" type_code="9">0b794558-7222-4284-9461-0de8d3145a1b</item>
                        <item name="Name" type_name="gh_string" type_code="10">End</item>
                        <item name="NickName" type_name="gh_string" type_code="10">End</item>
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                              <X>2080</X>
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                              <X>2093</X>
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                          <X>2125</X>
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                            <item name="Name" type_name="gh_string" type_code="10">List</item>
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                            <item name="Source" index="0" type_name="gh_guid" type_code="9">54a6063c-4c83-4aff-91d4-e361ac5db746</item>
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                                  <X>2127</X>
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                                  <X>2141</X>
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                            <item name="Name" type_name="gh_string" type_code="10">Index</item>
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                                  <X>2127</X>
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                            <item name="Name" type_name="gh_string" type_code="10">Wrap</item>
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                                  <X>2127</X>
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                                  <H>20</H>
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                                  <X>2141</X>
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                    <item name="ScriptSource" type_name="gh_string" type_code="10">    Dim i As Integer
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    Dim axis As New On3dVector(0, 0, 1)
    Dim pnts As New List(Of On3dVector)

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                    <item name="ScriptSource" type_name="gh_string" type_code="10">    Dim i As Integer
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    Dim axis As New On3dVector(0, 0, 1)
    Dim pnts As New List(Of On3dVector)

    pnts.Add(pos)
    
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      Dim P As New On3dVector
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    Dim dir As New On3dVector(1, 0, 0)    
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    Dim axis As New On3dVector(0, 0, 1)
    Dim pnts As New List(Of On3dVector)

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