FEM: Animation of Results (#18496)

2025-02-17 16:24:09 +00:00
parent 4698042deb
commit 6fcbafb121
5 changed files with 592 additions and 43 deletions
--- a/src/Mod/Fem/CMakeLists.txt
+++ b/src/Mod/Fem/CMakeLists.txt
@@ -32,6 +32,7 @@ SET(FemBaseModules_SRCS
    InitGui.py
    ObjectsFem.py
    TestFemApp.py
+    CreateLabels.py
 )

 SET(FemCommands_SRCS
--- a/src/Mod/Fem/CreateLabels.py
+++ b/src/Mod/Fem/CreateLabels.py
@@ -0,0 +1,185 @@
+# ***************************************************************************
+# *   Copyright (c) 2024 Peter McB
+# *                                                                         *
+# *   This file is part of the FreeCAD CAx development system.              *
+# *                                                                         *
+# *   This program is free software; you can redistribute it and/or modify  *
+# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
+# *   as published by the Free Software Foundation; either version 2 of     *
+# *   the License, or (at your option) any later version.                   *
+# *   for detail see the LICENCE text file.                                 *
+# *                                                                         *
+# *   This program is distributed in the hope that it will be useful,       *
+# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+# *   GNU Library General Public License for more details.                  *
+# *                                                                         *
+# *   You should have received a copy of the GNU Library General Public     *
+# *   License along with this program; if not, write to the Free Software   *
+# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+# *   USA                                                                   *
+# *                                                                         *
+# ***************************************************************************
+
+__title__ = "FreeCAD result mechanical task panel"
+__author__ = "PMcB"
+__url__ = "https://www.freecad.org"
+
+## @package view_result_mechanical
+#  \ingroup FEM
+#  \brief Create and Place Labels on the screen with an optional image.
+
+import FreeCADGui
+from pivy import coin
+
+"""
+Place Label on the screen with an optional image.
+positions on screen:
+         (-.9, .9, 0)    top left
+         (.9, .9, 0)     upper right
+         (-.9, -.9, 0)   lower left
+         (.9, -.9, 0)    lower right
+"""
+
+
+class createLabel:
+    def __init__(self, trans, text, image="") -> None:
+        self.textSep = coin.SoSeparator()
+        self.cam = coin.SoOrthographicCamera()
+        self.cam.aspectRatio = 1
+        self.cam.viewportMapping = coin.SoCamera.LEAVE_ALONE
+
+        self.trans = coin.SoTranslation()
+        self.trans.translation = trans
+        self.translation = trans
+        self.color = coin.SoBaseColor()
+        self.color.rgb = (0, 0, 0)
+
+        self.myFont = coin.SoFont()
+        self.myFont.name = "Arial,FreeSans,sans"
+        #       self.myFont.name = "FreeMono,FreeSans,sans"
+        self.size = 20  # 24
+        self.myFont.size.setValue(self.size)
+
+        self.SoText2 = coin.SoText2()
+        self.SoText2.string = text
+
+        self.textSep.addChild(self.cam)
+        self.textSep.addChild(self.trans)
+        self.textSep.addChild(self.color)
+        self.textSep.addChild(self.myFont)
+        self.textSep.addChild(self.SoText2)
+        self.activeDoc = FreeCADGui.ActiveDocument
+        self.view = self.activeDoc.ActiveView
+        self.viewer = self.view.getViewer()
+        self.render = self.viewer.getSoRenderManager()
+        self.isimage = False
+        if image != "":
+            self.add_image(image)
+            self.isimage = True
+        self.sup = self.render.addSuperimposition(self.textSep)
+        self.displayed = True
+
+    # get position of label
+    def get_position(self):
+        return self.translation
+
+    # set position of label
+    def set_position(self, trans):
+        self.trans.translation = trans
+        self.translation = trans
+
+    # set font
+    def set_font(self, font):
+        self.myFont.name = font
+
+    # set font size
+    def set_font_size(self, font_size):
+        self.myFont.size.setValue(font_size)
+
+    # set text of label
+    def set_text(self, text):
+        self.SoText2.string = text
+
+    # set colour of label
+    def set_colour(self, colour):
+        self.color.rgb = colour
+        self.textSep.addChild(self.color)
+
+    # add or change the image with the label
+    def add_image(self, image):
+        self.remove_image()
+        self.isimage = True
+        self.myImage = coin.SoImage()
+        self.myImage.filename.setValue(image)
+        self.textSep.addChild(self.myImage)
+
+    # remove the image
+    def remove_image(self):
+        if self.isimage:
+            # self.myImage = coin.SoImage()
+            self.textSep.removeChild(self.myImage)
+            self.isimage = False
+
+    # display the label
+    def display(self):
+        if not self.displayed:
+            # display the Superimposition layer with :
+            self.sup = self.render.addSuperimposition(self.textSep)
+            self.displayed = True
+
+    # hide the label
+    def hide(self):
+        # hide the Superimposition layer with :
+        if self.displayed:
+            self.render.removeSuperimposition(self.sup)
+            self.displayed = False
+
+    # help
+    def help(self):
+        print(
+            """
+Place Label on the screen with an optional image.
+Create an instance:
+import CreateLabels as CL
+label =  CL.creatLabel(<position of label>, <title of label>, <optional image>)
+e.g.:
+label1 = CL.createLabel( (-0.7, -0.90, 0), "this is text")
+label2 = CL.createLabel( (+0.5, -0.90, 0), "this is a image", image = "mesh.jpg")
+Positions on screen:
+        (-.9, .9, 0)    top left
+        (.9, .9, 0)     upper right
+        (-.9, -.9, 0)   lower left
+        (.9, -.9, 0)    lower right
+
+The following function are available:
+        label1.set_position((0.7, 0.50, 0))
+        pos= label1.get_position()
+        label1.set_font("FreeMono,FreeSans,sans")
+        label1.set_font_size(20)
+        label1.set_text("hello world")
+		label1.set_colour((0,1,0)) # colour of text
+        label1.add_image("opera.jpg")
+        label1.remove_image()
+        label1.hide()  - hide the label
+        label1.display()  - display the label, after hide
+"""
+        )
+
+
+if __name__ == "__main__":
+    label1 = createLabel((-0.98, 0.90, 0), "this a new text")
+"""
+Examples:
+import CreateLabels as CL
+label1 = CL.createLabel( (+0.5, -0.90, 0), "this is a image", image = "mesh.jpg")
+label2 = CL.createLabel( (-0.7, -0.90, 0), "this is text")
+
+label1.set_colour((0,1,0))
+label1.remove_image()
+label1.add_image("opera.jpg")
+label1.set_text("hello world")
+label1.set_position((+0.7, 0.50, 0))
+label1.set_font("FreeMono,FreeSans,sans")
+label1.hide()
+"""
--- a/src/Mod/Fem/Gui/Resources/ui/ResultShow.ui
+++ b/src/Mod/Fem/Gui/Resources/ui/ResultShow.ui
@@ -6,8 +6,8 @@
   <rect>
    <x>0</x>
    <y>0</y>
-    <width>335</width>
-    <height>548</height>
+    <width>477</width>
+    <height>798</height>
   </rect>
  </property>
  <property name="windowTitle">
@@ -16,6 +16,12 @@
  <layout class="QVBoxLayout" name="verticalLayout_4">
   <item>
    <widget class="QGroupBox" name="gb_result_type">
+     <property name="maximumSize">
+      <size>
+       <width>16777215</width>
+       <height>16777215</height>
+      </size>
+     </property>
     <property name="title">
      <string>Result type</string>
     </property>
@@ -158,6 +164,13 @@
          </property>
         </widget>
        </item>
+        <item row="0" column="1">
+         <widget class="QPushButton" name="show_histogram">
+          <property name="text">
+           <string>Histogram</string>
+          </property>
+         </widget>
+        </item>
       </layout>
      </item>
      <item>
@@ -199,13 +212,6 @@
          </property>
         </widget>
        </item>
-        <item row="2" column="1">
-         <widget class="QPushButton" name="show_histogram">
-          <property name="text">
-           <string>Histogram</string>
-          </property>
-         </widget>
-        </item>
       </layout>
      </item>
     </layout>
@@ -213,8 +219,14 @@
   </item>
   <item>
    <widget class="QGroupBox" name="gb_displacement">
+     <property name="maximumSize">
+      <size>
+       <width>16777215</width>
+       <height>180</height>
+      </size>
+     </property>
     <property name="title">
-      <string>Displacement</string>
+      <string>Displacement Scaling</string>
     </property>
     <layout class="QVBoxLayout" name="verticalLayout_2">
      <item>
@@ -241,7 +253,10 @@
           </sizepolicy>
          </property>
          <property name="maximum">
-           <number>100</number>
+           <number>1000</number>
+          </property>
+          <property name="value">
+           <number>5</number>
          </property>
          <property name="orientation">
           <enum>Qt::Horizontal</enum>
@@ -251,14 +266,14 @@
       </layout>
      </item>
      <item>
-       <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <layout class="QHBoxLayout" name="horizontalLayout_5">
        <item>
         <widget class="QLabel" name="label_3">
          <property name="enabled">
           <bool>false</bool>
          </property>
          <property name="text">
-           <string>Factor:</string>
+           <string>Factor</string>
          </property>
         </widget>
        </item>
@@ -274,24 +289,27 @@
           <bool>false</bool>
          </property>
          <property name="decimals">
-           <number>1</number>
+           <number>10</number>
          </property>
          <property name="maximum">
           <double>1000000.000000000000000</double>
          </property>
+          <property name="value">
+           <double>5.000000000000000</double>
+          </property>
         </widget>
        </item>
       </layout>
      </item>
      <item>
-       <layout class="QHBoxLayout" name="horizontalLayout_4">
+       <layout class="QHBoxLayout" name="horizontalLayout_6">
        <item>
         <widget class="QLabel" name="label_7">
          <property name="enabled">
           <bool>false</bool>
          </property>
          <property name="text">
-           <string>Slider max:</string>
+           <string>Slider Max</string>
          </property>
         </widget>
        </item>
@@ -307,7 +325,7 @@
           <bool>false</bool>
          </property>
          <property name="decimals">
-           <number>1</number>
+           <number>10</number>
          </property>
          <property name="maximum">
           <double>1000000.000000000000000</double>
@@ -319,8 +337,187 @@
     </layout>
    </widget>
   </item>
+   <item>
+    <widget class="QGroupBox" name="gb_animation">
+     <property name="enabled">
+      <bool>true</bool>
+     </property>
+     <property name="minimumSize">
+      <size>
+       <width>0</width>
+       <height>170</height>
+      </size>
+     </property>
+     <property name="maximumSize">
+      <size>
+       <width>16777215</width>
+       <height>16777215</height>
+      </size>
+     </property>
+     <property name="title">
+      <string>Animation Control</string>
+     </property>
+     <widget class="QWidget" name="layoutWidget">
+      <property name="geometry">
+       <rect>
+        <x>10</x>
+        <y>30</y>
+        <width>435</width>
+        <height>28</height>
+       </rect>
+      </property>
+      <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <item>
+        <widget class="QLabel" name="label_1">
+         <property name="enabled">
+          <bool>true</bool>
+         </property>
+         <property name="minimumSize">
+          <size>
+           <width>0</width>
+           <height>25</height>
+          </size>
+         </property>
+         <property name="text">
+          <string>Number of Steps per Cycle</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QDoubleSpinBox" name="steps">
+         <property name="enabled">
+          <bool>true</bool>
+         </property>
+         <property name="inputMethodHints">
+          <set>Qt::ImhFormattedNumbersOnly</set>
+         </property>
+         <property name="readOnly">
+          <bool>false</bool>
+         </property>
+         <property name="decimals">
+          <number>0</number>
+         </property>
+         <property name="maximum">
+          <double>1000000.000000000000000</double>
+         </property>
+         <property name="value">
+          <double>24.000000000000000</double>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+     <widget class="QWidget" name="layoutWidget">
+      <property name="geometry">
+       <rect>
+        <x>10</x>
+        <y>60</y>
+        <width>435</width>
+        <height>31</height>
+       </rect>
+      </property>
+      <layout class="QHBoxLayout" name="horizontalLayout_7">
+       <item>
+        <widget class="QLabel" name="label_8">
+         <property name="minimumSize">
+          <size>
+           <width>0</width>
+           <height>25</height>
+          </size>
+         </property>
+         <property name="text">
+          <string>Number of Cycles</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QDoubleSpinBox" name="loops">
+         <property name="decimals">
+          <number>0</number>
+         </property>
+         <property name="value">
+          <double>4.000000000000000</double>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+     <widget class="QWidget" name="layoutWidget">
+      <property name="geometry">
+       <rect>
+        <x>10</x>
+        <y>90</y>
+        <width>435</width>
+        <height>31</height>
+       </rect>
+      </property>
+      <layout class="QHBoxLayout" name="horizontalLayout_4">
+       <item>
+        <widget class="QLabel" name="label_2">
+         <property name="enabled">
+          <bool>true</bool>
+         </property>
+         <property name="minimumSize">
+          <size>
+           <width>0</width>
+           <height>25</height>
+          </size>
+         </property>
+         <property name="text">
+          <string>Frame Rate</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QDoubleSpinBox" name="framerate">
+         <property name="enabled">
+          <bool>true</bool>
+         </property>
+         <property name="inputMethodHints">
+          <set>Qt::ImhFormattedNumbersOnly</set>
+         </property>
+         <property name="readOnly">
+          <bool>false</bool>
+         </property>
+         <property name="decimals">
+          <number>0</number>
+         </property>
+         <property name="maximum">
+          <double>1000000.000000000000000</double>
+         </property>
+         <property name="value">
+          <double>24.000000000000000</double>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+     <widget class="QPushButton" name="startButton">
+      <property name="geometry">
+       <rect>
+        <x>10</x>
+        <y>130</y>
+        <width>435</width>
+        <height>25</height>
+       </rect>
+      </property>
+      <property name="toolTip">
+       <string>Toggles between Start and Stop</string>
+      </property>
+      <property name="text">
+       <string>Start Animation</string>
+      </property>
+     </widget>
+    </widget>
+   </item>
   <item>
    <widget class="QGroupBox" name="gb_displacement_2">
+     <property name="maximumSize">
+      <size>
+       <width>16777215</width>
+       <height>120</height>
+      </size>
+     </property>
     <property name="title">
      <string>User defined equation</string>
     </property>
--- a/src/Mod/Fem/femtaskpanels/task_result_mechanical.py
+++ b/src/Mod/Fem/femtaskpanels/task_result_mechanical.py
@@ -1,6 +1,7 @@
 # ***************************************************************************
 # *   Copyright (c) 2015 Qingfeng Xia <qingfeng.xia()eng.ox.ac.uk>          *
 # *   Copyright (c) 2016 Bernd Hahnebach <bernd@bimstatik.org>              *
+# *   Copyright (c) 2024 PMcB                                               *
 # *                                                                         *
 # *   This file is part of the FreeCAD CAx development system.              *
 # *                                                                         *
@@ -30,6 +31,9 @@ __url__ = "https://www.freecad.org"
 #  \ingroup FEM
 #  \brief task panel for mechanical ResultObjectPython

+import CreateLabels
+import inspect, sys
+
 try:
    import matplotlib

@@ -39,6 +43,7 @@ except Exception:

 import matplotlib.pyplot as plt
 import numpy as np
+import time, math

 from PySide import QtCore
 from PySide import QtGui
@@ -71,6 +76,12 @@ class _TaskPanel:
        self.result_widget = FreeCADGui.PySideUic.loadUi(ui_path + "ResultShow.ui")
        self.info_widget = FreeCADGui.PySideUic.loadUi(ui_path + "ResultHints.ui")
        self.form = [self.result_widget, self.info_widget]
+        self.results_name = "No Contour Data"
+        self.animate_inc = 1
+        self.startAnimate = False
+        self.animateText = []
+        self.slider_max = False
+        self.recurlim = min(200, sys.getrecursionlimit() / 2)

        self.fem_prefs = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Fem/General")
        self.restore_result_settings_in_dialog = self.fem_prefs.GetBool("RestoreResultDialog", True)
@@ -79,7 +90,9 @@ class _TaskPanel:
        # result type radio buttons
        # TODO: move to combo box, to be independent from result types and result types count
        QtCore.QObject.connect(
-            self.result_widget.rb_none, QtCore.SIGNAL("toggled(bool)"), self.none_selected
+            self.result_widget.rb_none,
+            QtCore.SIGNAL("toggled(bool)"),
+            self.none_selected,
        )
        QtCore.QObject.connect(
            self.result_widget.rb_abs_displacement,
@@ -107,13 +120,19 @@ class _TaskPanel:
            self.temperature_selected,
        )
        QtCore.QObject.connect(
-            self.result_widget.rb_vm_stress, QtCore.SIGNAL("toggled(bool)"), self.vm_stress_selected
+            self.result_widget.rb_vm_stress,
+            QtCore.SIGNAL("toggled(bool)"),
+            self.vm_stress_selected,
        )
        QtCore.QObject.connect(
-            self.result_widget.rb_maxprin, QtCore.SIGNAL("toggled(bool)"), self.max_prin_selected
+            self.result_widget.rb_maxprin,
+            QtCore.SIGNAL("toggled(bool)"),
+            self.max_prin_selected,
        )
        QtCore.QObject.connect(
-            self.result_widget.rb_minprin, QtCore.SIGNAL("toggled(bool)"), self.min_prin_selected
+            self.result_widget.rb_minprin,
+            QtCore.SIGNAL("toggled(bool)"),
+            self.min_prin_selected,
        )
        QtCore.QObject.connect(
            self.result_widget.rb_max_shear_stress,
@@ -131,11 +150,29 @@ class _TaskPanel:
            self.networkpressure_selected,
        )
        QtCore.QObject.connect(
-            self.result_widget.rb_peeq, QtCore.SIGNAL("toggled(bool)"), self.peeq_selected
+            self.result_widget.rb_peeq,
+            QtCore.SIGNAL("toggled(bool)"),
+            self.peeq_selected,
        )

        # stats
        self.result_widget.show_histogram.clicked.connect(self.show_histogram_clicked)
+        # animate
+        QtCore.QObject.connect(
+            self.result_widget.hsb_displacement_factor,
+            QtCore.SIGNAL("valueChanged(int)"),
+            lambda dummy="", name="scale": self.value_changed(self, dummy, name),
+        )
+        QtCore.QObject.connect(
+            self.result_widget.sb_displacement_factor,
+            QtCore.SIGNAL("valueChanged(double)"),
+            lambda dummy="", name="factor": self.value_changed(self, dummy, name),
+        )
+        QtCore.QObject.connect(
+            self.result_widget.startButton,
+            QtCore.SIGNAL("clicked()"),
+            lambda dummy="", name="startButton": self.value_changed(self, dummy, name),
+        )

        # displacement
        QtCore.QObject.connect(
@@ -223,6 +260,12 @@ class _TaskPanel:
            # self.result_widget.hsb_displacement_factor.setValue(df)
            self.result_widget.sb_displacement_factor_max.setValue(dfm)
            self.result_widget.sb_displacement_factor.setValue(df)
+            # animate
+            self.startAnimate = False
+            if FreeCAD.FEM_dialog["animate"][0] != -1:
+                self.result_widget.steps.setValue(FreeCAD.FEM_dialog["animate"][0])
+                self.result_widget.loops.setValue(FreeCAD.FEM_dialog["animate"][1])
+                self.result_widget.framerate.setValue(FreeCAD.FEM_dialog["animate"][2])
        except Exception:
            self.restore_initial_result_dialog()

@@ -238,9 +281,10 @@ class _TaskPanel:
        # https://github.com/FreeCAD/FreeCAD/commit/3a7772d
        FreeCAD.FEM_dialog = {
            "results_type": "None",
-            "show_disp": False,
-            "disp_factor": 0.0,
+            "show_disp": True,  # False,
+            "disp_factor": 5.0,
            "disp_factor_max": 100.0,
+            "animate": [-1, -1, -1, -1],  # steps, loops, rate, indicator (not used)
        }
        self.result_widget.sb_displacement_factor_max.setValue(100.0)  # init non standard values

@@ -251,6 +295,7 @@ class _TaskPanel:
        return resulttools.get_stats(self.result_obj, type_name)

    def none_selected(self, state):
+        self.set_label(self.result_obj.Label, "No Contours")
        FreeCAD.FEM_dialog["results_type"] = "None"
        self.set_result_stats("mm", 0.0, 0.0)
        self.reset_mesh_color()
@@ -303,7 +348,10 @@ class _TaskPanel:
    def vm_stress_selected(self, state):
        if len(self.result_obj.vonMises) > 0:
            self.result_selected(
-                "Sabs", self.result_obj.vonMises, "MPa", translate("FEM", "von Mises Stress")
+                "Sabs",
+                self.result_obj.vonMises,
+                "MPa",
+                translate("FEM", "von Mises Stress"),
            )
        else:
            self.result_widget.rb_none.setChecked(True)
@@ -312,7 +360,10 @@ class _TaskPanel:
    def max_shear_selected(self, state):
        if len(self.result_obj.MaxShear) > 0:
            self.result_selected(
-                "MaxShear", self.result_obj.MaxShear, "MPa", translate("FEM", "Max Shear Stress")
+                "MaxShear",
+                self.result_obj.MaxShear,
+                "MPa",
+                translate("FEM", "Max Shear Stress"),
            )
        else:
            self.result_widget.rb_none.setChecked(True)
@@ -333,7 +384,10 @@ class _TaskPanel:
    def temperature_selected(self, state):
        if len(self.result_obj.Temperature) > 0:
            self.result_selected(
-                "Temp", self.result_obj.Temperature, "K", translate("FEM", "Temperature")
+                "Temp",
+                self.result_obj.Temperature,
+                "K",
+                translate("FEM", "Temperature"),
            )
        else:
            self.result_widget.rb_none.setChecked(True)
@@ -342,7 +396,10 @@ class _TaskPanel:
    def massflowrate_selected(self, state):
        if len(self.result_obj.MassFlowRate) > 0:
            self.result_selected(
-                "MFlow", self.result_obj.MassFlowRate, "kg/s", translate("FEM", "Mass Flow Rate")
+                "MFlow",
+                self.result_obj.MassFlowRate,
+                "kg/s",
+                translate("FEM", "Mass Flow Rate"),
            )
        else:
            self.result_widget.rb_none.setChecked(True)
@@ -375,7 +432,10 @@ class _TaskPanel:
    def peeq_selected(self, state):
        if len(self.result_obj.Peeq) > 0:
            self.result_selected(
-                "Peeq", self.result_obj.Peeq, "", translate("FEM", "Equivalent Plastic Strain")
+                "Peeq",
+                self.result_obj.Peeq,
+                "",
+                translate("FEM", "Equivalent Plastic Strain"),
            )
        else:
            self.result_widget.rb_none.setChecked(True)
@@ -396,7 +456,10 @@ class _TaskPanel:
                QtGui.QMessageBox.information(
                    None,
                    self.result_obj.Label + " - " + translate("FEM", "Information"),
-                    translate("FEM", "No histogram available.\nPlease select a result type first."),
+                    translate(
+                        "FEM",
+                        "No histogram available.\nPlease select a result type first.",
+                    ),
                )

    def user_defined_text(self, equation):
@@ -404,7 +467,6 @@ class _TaskPanel:
        self.result_widget.user_def_eq.toPlainText()

    def calculate(self):
-
        # Convert existing result values to numpy array
        # scalars
        P1 = np.array(self.result_obj.PrincipalMax)
@@ -461,6 +523,7 @@ class _TaskPanel:
        self.update()
        self.restore_result_dialog()
        userdefined_eq = self.result_widget.user_def_eq.toPlainText()  # Get equation to be used
+        self.results_name = "User Defined: " + userdefined_eq

        # https://forum.freecad.org/viewtopic.php?f=18&t=42425&start=10#p368774 ff
        # https://github.com/FreeCAD/FreeCAD/pull/3020
@@ -533,6 +596,7 @@ class _TaskPanel:
        return scalar_list

    def result_selected(self, res_type, res_values, res_unit, res_title):
+        self.results_name = res_title
        FreeCAD.FEM_dialog["results_type"] = res_type
        (minm, maxm) = self.get_result_stats(res_type)
        self.update_colors_stats(res_values, res_unit, minm, maxm)
@@ -555,6 +619,7 @@ class _TaskPanel:
        fig_manager.window.setWindowFlag(QtCore.Qt.Tool)

    def update_colors_stats(self, res_values, res_unit, minm, maxm):
+        self.set_label(self.result_obj.Label, self.results_name)
        QApplication.setOverrideCursor(Qt.WaitCursor)
        if self.suitable_results:
            self.mesh_obj.ViewObject.setNodeColorByScalars(self.result_obj.NodeNumbers, res_values)
@@ -596,6 +661,7 @@ class _TaskPanel:
        self.update_displacement()

    def sb_disp_factor_max_changed(self, value):
+        self.slider_max = True
        FreeCAD.FEM_dialog["disp_factor_max"] = value
        if value < self.result_widget.sb_displacement_factor.value():
            self.result_widget.sb_displacement_factor.setValue(value)
@@ -605,19 +671,24 @@ class _TaskPanel:
            self.result_widget.hsb_displacement_factor.setValue(
                round(self.result_widget.sb_displacement_factor.value() / value * 100.0)
            )
+        self.slider_max = False

    def sb_disp_factor_changed(self, value):
-        FreeCAD.FEM_dialog["disp_factor"] = value
-        if value > self.result_widget.sb_displacement_factor_max.value():
-            self.result_widget.sb_displacement_factor.setValue(
-                self.result_widget.sb_displacement_factor_max.value()
-            )
-        if self.result_widget.sb_displacement_factor_max.value() == 0.0:
-            self.result_widget.hsb_displacement_factor.setValue(0.0)
-        else:
-            self.result_widget.hsb_displacement_factor.setValue(
-                round(value / self.result_widget.sb_displacement_factor_max.value() * 100.0)
-            )
+        # this bit of code causes:
+        # RecursionError: maximum recursion depth exceeded
+        # so check on the depth and don't exceed recurlim
+        if len(inspect.stack(0)) < self.recurlim:
+            FreeCAD.FEM_dialog["disp_factor"] = value
+            if value > self.result_widget.sb_displacement_factor_max.value():
+                self.result_widget.sb_displacement_factor.setValue(
+                    self.result_widget.sb_displacement_factor_max.value()
+                )
+            if self.result_widget.sb_displacement_factor_max.value() == 0.0:
+                self.result_widget.hsb_displacement_factor.setValue(0.0)
+            else:
+                self.result_widget.hsb_displacement_factor.setValue(
+                    round(value / self.result_widget.sb_displacement_factor_max.value() * 100.0)
+                )

    def disable_empty_result_buttons(self):
        """disable radio buttons if result does not exists in result object"""
@@ -706,6 +777,99 @@ class _TaskPanel:
        # thus reset edit does not close the dialog, maybe don't call but set in edit instead
        FreeCADGui.Control.closeDialog()
        FreeCADGui.ActiveDocument.resetEdit()
+        if len(self.animateText) > 0:
+            for a in self.animateText:
+                a.hide()
+            self.animateText = []
+        self.startAnimate = False
+        FreeCAD.FEM_dialog["animate"][0] = self.result_widget.steps.value()
+        FreeCAD.FEM_dialog["animate"][1] = self.result_widget.loops.value()
+        FreeCAD.FEM_dialog["animate"][2] = self.result_widget.framerate.value()
+
+    # animation start
+    def animate_displacement(self):
+        if "result_obj" in FreeCAD.FEM_dialog:
+            if FreeCAD.FEM_dialog["result_obj"] != self.result_obj:
+                self.update_displacement()
+        self.result_widget.cb_show_displacement.setChecked(True)
+        FreeCAD.FEM_dialog["result_obj"] = self.result_obj
+        if self.suitable_results:
+            self.mesh_obj.ViewObject.setNodeDisplacementByVectors(
+                self.result_obj.NodeNumbers, self.result_obj.DisplacementVectors
+            )
+        self.result_widget.startButton.setText("Stop Animation")
+        frame_rate = 10
+        self.hsb_displacement_factor = self.result_widget.sb_displacement_factor.value()
+        frame_rate = self.result_widget.framerate.value()
+        steps_per_cycle = int(self.result_widget.steps.value())
+        number_cycles = int(self.result_widget.loops.value())
+
+        inc = math.pi / steps_per_cycle * 2.0
+        self.set_label(self.result_obj.Label, self.results_name)
+
+        done = False
+        for lo in range(0, number_cycles):
+            for st in range(0, steps_per_cycle):
+                self.mesh_obj.ViewObject.applyDisplacement(
+                    math.sin(st * inc) * self.hsb_displacement_factor
+                )
+                FreeCADGui.updateGui()
+                if not self.startAnimate:
+                    done = True
+                    break
+                time.sleep(1.0 / frame_rate)  # modify the time here
+            if done:
+                break
+        try:
+            self.result_widget.startButton.setText("Start Animation")
+        except:
+            pass
+        QtGui.QApplication.restoreOverrideCursor()
+        self.startAnimate = False
+
+    def value_changed(self, dummy, value, myType):
+        # the only actions are:
+        if myType == "startButton":
+            if not self.startAnimate:
+                self.startAnimate = True
+                self.animate_displacement()
+            else:
+                self.startAnimate = False
+        # # this is taken care of in the "ui"
+        # # set the scale - scroll bar - Show
+        # elif myType == "scale" and not self.slider_max:
+        #     if self.animate_inc == 0:
+        #         if self.result_widget.hsb_displacement_factor.value() > 1:
+        #             self.result_widget.sb_displacement_factor.setValue(
+        #                 self.result_widget.hsb_displacement_factor.value()
+        #             )
+        #     self.animate_inc = 1 - self.animate_inc
+        # # set the factor - spin - Factor
+        # elif myType == "factor" and not self.slider_max:
+        #     if self.animate_inc == 0:
+        #         self.result_widget.hsb_displacement_factor.setValue(
+        #             int(self.result_widget.sb_displacement_factor.value())
+        #         )
+        #     self.animate_inc = 1 - self.animate_inc
+        else:
+            pass
+        try:
+            self.hsb_displacement_factor = self.result_widget.sb_displacement_factor.value()
+
+        except:
+            pass
+        return
+
+    def set_label(self, result_name, mesh_data):
+        if len(self.animateText) == 0:
+            self.animateText.append(CreateLabels.createLabel((-0.98, 0.90, 0), result_name))
+            self.animateText.append(CreateLabels.createLabel((-0.98, 0.70, 0), mesh_data))
+        else:
+            self.animateText[1].set_text(mesh_data)
+        pass
+
+
+# animation end


 # helper
--- a/src/Mod/Fem/femviewprovider/view_result_mechanical.py
+++ b/src/Mod/Fem/femviewprovider/view_result_mechanical.py
@@ -1,6 +1,7 @@
 # ***************************************************************************
 # *   Copyright (c) 2015 Qingfeng Xia <qingfeng.xia()eng.ox.ac.uk>          *
 # *   Copyright (c) 2016 Bernd Hahnebach <bernd@bimstatik.org>              *
+# *   Copyright (c) 2024 PMcB                                               *
 # *                                                                         *
 # *   This file is part of the FreeCAD CAx development system.              *
 # *                                                                         *
@@ -54,7 +55,8 @@ class VPResultMechanical(view_base_femconstraint.VPBaseFemConstraint):
    def unsetEdit(self, vobj, mode=0):
        FreeCADGui.Control.closeDialog()
        # hide the mesh after result viewing is finished, but do not reset the coloring
-        self.Object.Mesh.ViewObject.hide()
+        # change this to not hide - PMcB
+        # self.Object.Mesh.ViewObject.hide()
        return True

    def claimChildren(self):