initial rough working

vtk/src/layers/EGlyphLayer.h

@@ -4,6 +4,8 @@
 #include "Layer.h"
 #include <vtkPolyData.h>
 
+#include "../advection/UVGrid.h"
+
 /** Implements the Layer class for the case of a Eulerian visualization.
   * Specifically, this class models the eulerian flow-fields of the simulation using the 'glyph' mark and 'direction' and 'form' channels to denote direction and strength of velocities.
   */
@@ -11,6 +13,7 @@ class EGlyphLayer : public Layer {
 private:
   vtkSmartPointer<vtkPolyData> data;
   vtkSmartPointer<vtkDoubleArray> direction;
+  std::shared_ptr<UVGrid> uvGrid;
   int numLats;
   int numLons;
 
@@ -22,7 +25,7 @@ private:
 public:
   /** Constructor.
     */
-  EGlyphLayer();
+  EGlyphLayer(std::shared_ptr<UVGrid> uvGrid);
 
   /** updates the glyphs to reflect the given timestamp in the dataset.
     * @param t : the time at which to fetch the data.