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--- commit:2018:07_19 [2018/07/18 10:53] – created cerquaglia
+++ commit:2018:07_19 [2018/07/18 11:49] – cerquaglia
@@ Line 1: / Line 1: @@
 ====== Commit 2018-07-17 ======
-The general feature of this commit is described in the first section, then the corresponding test case, and finally, some minor modifications.
+===== 1. Description =====
+A center of gravity and mass extractor for ''interactions'' has been implemented in Metafor.
-===== 1. Description =====
+The synthax is the same as other extractors:
+<code>
+valuesmanager = metafor.getValuesManager()
+extractor1 = InteractionGravityCenterAndMassValueExtractor(interaction)
+valuesmanager.add(nbr, extractor1, name = "TheNameYouWant")        # manages extraction, result storage...
+</code>
+At each archiving step the extractor fills a four columns text file, where columns 1-3 contain x, y, and z coordinates of the center of gravity respectively, and column 4 contains the value of the mass.
+<note>
+Since the evolution of the density is not directly tracked in Metafor, in order to take into account the density variation for the computation of the center of gravity and mass, the mass matrix is directly employed.</note>
-===== 2. Test case =====
+<note important>
+To compute the center of gravity and the mass of an interaction a density different from zero is needed. Pay attention, when you define your material properties, to explicitly define a ''MASS_DENSITY'' different from zero, otherwise a ''FATAL_ERROR'' is raised.
+</note>
+===== 2. Tests =====
-===== 3. Minor modifications =====
+For the moment, a gravity center and mass extractor has been added in ''apps/imp/bounce.py'' and for all the test cases contained in ''apps/monosMaterials2'' and ''mtThixo/tests/monoMaterials2'' via ''apps/toolbox/materialTesting.py''. A density different from zero has been defined when needed.
@@ Line 16: / Line 30: @@
 <code>
-[a] apps/gps/contThickEvol.py
+[m] apps/imp/bounce.py
+[m] apps/toolbox/materialTesting.py
+[m] apps/monoMaterials2/EvpAnisoDamageAlvBoneRemod.py
+[m] apps/monoMaterials2/EvpAnisoDamageBoneRemod.py
+[m] apps/monoMaterials2/EvpAnisoDamageDummy.py
+[m] apps/monoMaterials2/EvpAnisoDamageLemaitre.py
+[m] apps/monoMaterials2/EvpIsoDamageAlvBoneRemod2.py
+[m] apps/monoMaterials2/EvpIsoDamageBoneRemod.py
+[m] apps/monoMaterials2/NortonHoff.py
+[m] mtThixo/tests/monoMaterials2/ThixoEnhanced.py
+[m] mtThixo/tests/monoMaterials2/ThixoEquivalentNortonHoff.py
+[m] mtThixo/tests/monoMaterials2/ThixoMicroMacro.py
+[m] mtThixo/tests/monoMaterials2/ThixoNortonHoff.py
 </code>