added resetCamera()

Author: Tom O'Reilly

src/qt-guilib/TopoDataItem.cpp

@@ -467,7 +467,7 @@ void TopoDataItem::assemblePipeline(TopoDataItem::Pipeline *pipeline) {
     pipeline->renderer_->AddActor(pipeline->axesActor_);    
   }
 
-  pipeline->surfaceActor_->SetScale(1., 1., verticalExagg_);  // NEW!
+  pipeline->surfaceActor_->SetScale(1., 1., verticalExagg_); 
   pipeline->interactorStyle_->SetDefaultRenderer(pipeline->renderer_);
 
   pipeline->windowInteractor_->SetPicker(pipeline->areaPicker_);
@@ -743,3 +743,11 @@ double TopoDataItem::getLightIntensity() {
 vtkPolyData *TopoDataItem::getPolyData() {
   return pipeline_->polyData_;
 }
+
+
+void TopoDataItem::resetCamera() {
+  qDebug() << "resetCamera()";
+  pipeline_->renderer_->ResetCamera();
+  reassemblePipeline();
+}
+

src/qt-guilib/TopoDataItem.h

@@ -72,7 +72,10 @@ namespace mb_system {
       vtkNew<mb_system::TopoDataReader> topoReader_;
 
       vtkNew<vtkElevationFilter> elevFilter_;
+
+      /// Used to compute slope
       vtkNew<vtkPolyDataNormals> normalsFilter_;
+      
       vtkNew<vtkIdFilter> idFilter_;
       vtkNew<vtkLookupTable> elevLookupTable_;
       vtkNew<vtkActor> surfaceActor_;
@@ -194,6 +197,10 @@ namespace mb_system {
     Q_INVOKABLE QString printMouseHelp() {
       return "Mouse help goes here";
     }
+
+    /// Reset camera, all actors in bounding box
+    Q_INVOKABLE void resetCamera();
+
 
     /// Set picked point
     void setPickedPoint(double *worldCoords);