gem-graph-client/data/dimers random walk.xml

<?xml version="1.0" encoding="UTF-8"?>
<gem-graph-model version="0.2.1">

    <identity !-- TODO define a key >
       <name>model name </name>
       <owner>owner</owner>
       <owner_id>owner_id</owner_id>
       <date>2021</date>
       <version>1.0</version>
       <g_ref id="text" date="date" author="author" lang="en">Ref</g_ref>

    </identity>

    <parameters id="text" date="date" author="author">
        <simulation>
            <max_thread>0</max_thread>
            <max_cycles>9</max_cycles>

        </simulation>

        <space-param>
    <!-- loop_on_zero="true"  anything moved before zero reenters at the end of space-->
    <!-- loop_on_zero="false" anything moved before zero is lost-->
    <!-- loop_on_max="true"   anything moved beyond max reenters at the zero of space-->
    <!-- loop_on_max="false"  anything moved beyond max is lost-->

            <dimension x="29"/>

            <!-- Site_multiplicity = number of sites in a space unit. -->
            <!-- Each site points towards a neighbouring space unit. -->
            <!-- Several arrows can be stacked in the same site. -->

            <site_multiplicity>3</site_multiplicity>

        </space-param>

    </parameters>

    <!-- Model objects definition -->

    <objects id="only dimers in this model" date="date" author="author">
        <object id="a dimer" date="date" author="author">
            <arrow site="1" weight="1" x="0"/>
            <arrow site="2" weight="1" x="1"/>
        </object>

    </objects>


    <!-- Saved space description (initial space is sequence 0) -->

    <savedstates id="texte" date="date" author="author">
        <state id="initial" date="date" author="author">
            <arrow site="0" weight="1" x="0"/>
            <arrow site="1" weight="1" x="1"/>
            <arrow site="0" weight="1" x="10"/>
            <arrow site="1" weight="1" x="11"/>
            <arrow site="0" weight="1" x="20"/>
            <arrow site="1" weight="1" x="21"/>

          <!-- Three dimers 1-1 are drawn in the global space
               at locations (0,1) (10,11) and (20,21) -->

      </state>

    </savedstates>

    <!-- Model transitions definition (rules) -->
    <!-- In this version : <xs:sequence minOccurs="0" maxOccurs="unbounded">-->
    <!-- Transitions should be edited by hand and written in a 'human-readable' format -->

    <conditions id="random walk of dimers" date="date" author="author">

        <condition site="1" weight="1" node_id="1" parent="0" x="0"/>
        <condition site="2" weight="1" node_id="2" parent="1" x="1"/>
        <!-- as soon as conditions 1 and 2 are satisfied, a dimer is identified at atation (0,1). -->

        <condition site="1" weight="0" node_id="3" parent="2" x="2"/>
        <!-- as soon as condition 3 is satisfied,
             the neighbouring space unit to East of the dimer is empty
             and the dimer identified by conditions (1,2)  can be moved to East. -->

        <condition site="2" weight="0" node_id="4" parent="2" x="-1"/>
        <!-- as soon as condition 4 is satisfied,
             the neighbouring space unit to West of the dimer is empty
             and  the dimer identified by conditions (1,2) can be moved to West. -->

    </conditions>

    <transitions>

        <transition id="move_a_dimer_to_east" date="date" author="author"
                  parent="3" probability="1">

            <arrow site="1" weight="0" x="0"/>
            <arrow site="2" weight="0" x="1"/>
            <arrow site="1" weight="1" x="1"/>
            <arrow site="2" weight="1" x="2"/>

      </transition>

      <transition id="move_a_dimer_to_west" date="date" author="author"
                  parent="4" probability="1">

            <arrow site="1" weight="0" x="0"/>
            <arrow site="2" weight="0" x="1"/>
            <arrow site="2" weight="1" x="0"/>
            <arrow site="1" weight="1" x="1"/>

      </transition>

    </transitions>

</gem-graph-model>