Import: Clarify vtkImporter::UpdateTimeStep doc and usage

IO/Geometry/vtkGLTFDocumentLoader.h

@@ -526,8 +526,8 @@ public:
   };
 
   /**
-   * Apply the specified animation, at the specified time, to the internal Model. Changes node
-   * transforms and morphing weights.
+   * Apply the specified animation, at the specified time value t, to the internal Model. Changes
+   * node transforms and morphing weights.
    */
   bool ApplyAnimation(float t, int animationId, bool forceStep = false);
 

IO/Import/vtkGLTFImporter.cxx

@@ -674,13 +674,13 @@ void vtkGLTFImporter::ImportLights(vtkRenderer* renderer)
 }
 
 //----------------------------------------------------------------------------
-void vtkGLTFImporter::UpdateTimeStep(double timestep)
+void vtkGLTFImporter::UpdateTimeStep(double timeValue)
 {
   for (int animationId = 0; animationId < this->GetNumberOfAnimations(); animationId++)
   {
     if (this->EnabledAnimations[animationId])
     {
-      this->Loader->ApplyAnimation(static_cast<float>(timestep), animationId);
+      this->Loader->ApplyAnimation(static_cast<float>(timeValue), animationId);
     }
   }
   this->Loader->BuildGlobalTransforms();

IO/Import/vtkGLTFImporter.h

@@ -102,7 +102,7 @@ public:
   /**
    * update timestep
    */
-  void UpdateTimeStep(double timestep) override;
+  void UpdateTimeStep(double timeValue) override;
 
   /**
    * Get the number of available animations.

IO/Import/vtkImporter.cxx

@@ -220,7 +220,7 @@ bool vtkImporter::GetTemporalInformation(vtkIdType vtkNotUsed(animationIdx),
 }
 
 //------------------------------------------------------------------------------
-void vtkImporter::UpdateTimeStep(double vtkNotUsed(timeStep))
+void vtkImporter::UpdateTimeStep(double vtkNotUsed(timeValue))
 {
   this->Update();
 }

IO/Import/vtkImporter.h

@@ -152,10 +152,10 @@ public:
     double timeRange[2], vtkDoubleArray* timeSteps);
 
   /**
-   * Import the actors, camera, lights and properties at a specific timestep.
+   * Import the actors, camera, lights and properties at a specific time value.
    * If not reimplemented, only call Update().
    */
-  virtual void UpdateTimeStep(double timeStep);
+  virtual void UpdateTimeStep(double timeValue);
 
 protected:
   vtkImporter();