[drape] central storage for VisualScale and may be for some other vizualization params in future

drape_frontend/vizualization_params.cpp

@@ -0,0 +1,22 @@
+#include "vizualization_params.hpp"
+
+#include "../base/math.hpp"
+#include "../base/assert.hpp"
+
+#include "../std/limits.hpp"
+
+namespace df
+{
+  double VizualizationParams::GetVisualScale()
+  {
+    ASSERT(!my::AlmostEqual(m_visualScale, numeric_limits<double>::min()), ());
+    return m_visualScale;
+  }
+
+  void VizualizationParams::SetVisualScale(double visualScale)
+  {
+    m_visualScale = visualScale;
+  }
+
+  double VizualizationParams::m_visualScale = numeric_limits<double>::min();
+}

drape_frontend/vizualization_params.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+namespace df
+{
+  class VizualizationParams
+  {
+  public:
+    static double GetVisualScale();
+    static void SetVisualScale(double visualScale);
+
+  private:
+    static double m_visualScale;
+  };
+}