Viewer support for change data re render.

src/src/base/infinitiViewer.cxx

@@ -1027,6 +1027,7 @@ void infinitiViewer::SetInputData(vtkImageData* in)
 	printf("fusion origin:%f,%f,%f", in->GetOrigin()[0], in->GetOrigin()[1], in->GetOrigin()[2]);
 	printf("fusion spacing:%f,%f,%f", in->GetSpacing()[0], in->GetSpacing()[1], in->GetSpacing()[2]);
 #endif
+	this->FirstRender = 1;
 	this->ImageActor->GetMapper()->SetInputData(in);
 	this->RemoveFusionData();
 	this->ActiveRuler();