added new option to modulate brightness for LGlyphLayer

particle-track-and-trace/src/technique.h

@@ -0,0 +1,25 @@
+#ifndef TECHNIQUE_H
+#define TECHNIQUE_H
+
+#include "layers/Layer.h"
+#include <vtkPolyData.h>
+class Technique {
+private:
+  std::vector<Layer *> layers;
+  vtkSmartPointer<vtkPoints> points;
+  vtkSmartPointer<vtkPolyData> data;
+
+  void setupInteractions();
+
+public:
+  Technique();
+  void addLayer(Layer *l);
+  void removeLayer(Layer *l);
+  void updateData(int t); 
+  int numberOfLayers();
+
+};
+
+
+
+#endif