Fixed variable not found

Change-Id: I8657d2e2e1ec581a692c456ae214e7ec573e213b

Rendering/VolumeOpenGL2/vtkOpenGLGPUVolumeRayCastMapper.cxx

@@ -1995,8 +1995,8 @@ void vtkOpenGLGPUVolumeRayCastMapper::GPURender(vtkRenderer* ren,
     std::cerr << "Data changed " << input->GetMTime() << std::endl;
 
   // Update the volume if needed
-//  if (input != this->Impl->PrevInput)
-//    {
+  if (input != this->Impl->PrevInput)
+    {
     input->GetDimensions(this->Impl->Dimensions);
 
     // Update bounds, data, and geometry
@@ -2004,7 +2004,7 @@ void vtkOpenGLGPUVolumeRayCastMapper::GPURender(vtkRenderer* ren,
     this->Impl->LoadVolume(input, scalars);
     this->Impl->LoadMask(input, this->MaskInput,
                          this->Impl->Extents, vol);
-//    }
+    }
 
   // Mask
   vtkVolumeMask* mask = 0;
@@ -2042,9 +2042,7 @@ void vtkOpenGLGPUVolumeRayCastMapper::GPURender(vtkRenderer* ren,
       this->Impl->ShaderBuildTime.GetMTime() ||
       this->GetMTime() > this->Impl->ShaderBuildTime.GetMTime() ||
       ren->GetActiveCamera()->GetParallelProjection() !=
-      this->Impl->LastProjectionParallel ||
-      ren->GetMTime() > this->Impl->ShaderBuildTime.GetMTime()
-      )
+      this->Impl->LastProjectionParallel)
     {
     this->Impl->LastProjectionParallel =
       ren->GetActiveCamera()->GetParallelProjection();

Rendering/VolumeOpenGL2/vtkVolumeShaderComposer.h

@@ -122,6 +122,7 @@ namespace vtkvolume
       uniform mat4 m_inverse_modelview_matrix; \n\
       uniform mat4 m_texture_dataset_matrix; \n\
       uniform mat4 m_inverse_texture_dataset_matrix; \n\
+      uniform mat4 m_texture_to_eye_it; \n\
       \n\
       // Ray step size \n\
       uniform vec3 m_cell_step; \n\
@@ -408,7 +409,7 @@ namespace vtkvolume
               { \n\
               final_color += m_specular * pow(n_dot_h, m_shininess); \n\
               } \n\
-            final_color = clamp(final_colvtkOpenGLGPUVolumeRayCastMapperor, vec3(0.0), vec3(1.0)); \n\
+            final_color = clamp(final_color, vec3(0.0), vec3(1.0)); \n\
             if (grad.w >= 0.0)\n\
               {\n\
               color.a = color.a * computeGradientOpacity(grad); \n\