From 09fe84abbf43d26bf62f0cd87e9287026edf9cc6 Mon Sep 17 00:00:00 2001
From: jriegel <FreeCAD@juergen-riegel.net>
Date: Thu, 28 Nov 2013 23:30:21 +0100
Subject: [PATCH] Finish Displacement and animation of it.

---
 src/Mod/Fem/Gui/ViewProviderFemMesh.cpp      | 23 +++++++++++++++++++-
 src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp | 11 +++++++---
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp b/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
index 1335d2b0f..6c40269b3 100755
--- a/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMesh.cpp
@@ -213,6 +213,7 @@ ViewProviderFemMesh::ViewProviderFemMesh()
     pcPointMaterial->ref();
     //PointMaterial.touch();
 
+    DisplacementFactor = 0;
 }
 
 ViewProviderFemMesh::~ViewProviderFemMesh()
@@ -548,8 +549,28 @@ void ViewProviderFemMesh::resetDisplacementByNodeId(void)
 /// reaply the node displacement with a certain factor and do a redraw
 void ViewProviderFemMesh::animateNodes(double factor)
 {
+    float x,y,z;
+    // set the point coordinates
+    long sz = pcCoords->point.getNum();
+    SbVec3f* verts = pcCoords->point.startEditing();
+    for (long i=0;i < sz ;i++) {
+        verts[i].getValue(x,y,z);
+        // undo old factor#
+        Base::Vector3d oldDisp = DisplacementVector[i] * DisplacementFactor;
+        x -= oldDisp.x;
+        y -= oldDisp.y;
+        z -= oldDisp.z;
+        // apply new factor
+        Base::Vector3d newDisp = DisplacementVector[i] * factor;
+        x += newDisp.x;
+        y += newDisp.y;
+        z += newDisp.z;
+        // set the new value
+        verts[i].setValue(x,y,z);
+    }
+    pcCoords->point.finishEditing();
 
-
+    DisplacementFactor = factor;
 }
 
 
diff --git a/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp b/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp
index 75d738713..e19204b6c 100644
--- a/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp
+++ b/src/Mod/Fem/Gui/ViewProviderFemMeshPyImp.cpp
@@ -20,10 +20,15 @@ std::string ViewProviderFemMeshPy::representation(void) const
 
 
 
-PyObject* ViewProviderFemMeshPy::animate(PyObject * /*args*/)
+PyObject* ViewProviderFemMeshPy::animate(PyObject * args)
 {
-    PyErr_SetString(PyExc_NotImplementedError, "Not yet implemented");
-    return 0;
+    double factor;
+    if (!PyArg_ParseTuple(args, "d", &factor))
+        return 0;
+
+    this->getViewProviderFemMeshPtr()->animateNodes(factor);
+
+    Py_Return;
 }