prepared new files

particle-track-and-trace/src/layers/LColLayer.h

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+#ifndef LCOLLAYER_H
+#define LCOLLAYER_H
+
+#include "Layer.h"
+#include "../advection/kernel/AdvectionKernel.h"
+#include "../commands/SpawnPointCallback.h"
+#include <vtkPolyData.h>
+#include <vtkInteractorStyle.h>
+
+/** Implements the Layer class for the case of a Lagrangian visualization.
+  * Specifically, this class models the Lagrangian particles in the simulation using the 'glyph' mark and 'transparency' channel to denote age.
+  */
+class LColLayer : public Layer {
+private:
+  vtkSmartPointer<vtkPoints> points;
+  vtkSmartPointer<vtkPolyData> data;
+  vtkSmartPointer<vtkIntArray> particlesBeached;
+  vtkSmartPointer<vtkIntArray> particlesAge;
+  std::unique_ptr<AdvectionKernel> advector;
+  std::shared_ptr<UVGrid> uvGrid;
+  int dt = 3600;
+  int beachedAtNumberOfTimes = 20;
+
+public:
+  /** Constructor.
+    */
+  LColLayer(std::shared_ptr<UVGrid> uvGrid, std::unique_ptr<AdvectionKernel> advectionKernel);
+
+  /**
+   * This function spoofs a few points in the dataset. Mostly used for testing.
+   */
+  void spoofPoints();
+
+  /**
+   * updates the glyphs to reflect the given timestamp in the dataset.
+   * @param t : the time at which to fetch the data.
+   */
+  void updateData(int t) override;
+
+  vtkSmartPointer<SpawnPointCallback> createSpawnPointCallback();
+
+  void addObservers(vtkSmartPointer<vtkRenderWindowInteractor> interactor) override;
+
+
+  /** 
+   * Sets a custom DT value, needed for advect calls to the simulation logic.
+   */ 
+  void setDt(int dt);
+};
+
+#endif