add coarseFromRangeVector method

src/core/Grid.cpp

@@ -75,6 +75,22 @@ long Grid::refineFromRangeVector(std::vector<double> v, double min, double max){
   return counter;
 }
 
+long Grid::coarseFromRangeVector(std::vector<double> v, double threshold){
+  long counter = 0;
+
+  PiercedVector<double> pv = VtoPV(v, this);
+
+  for (auto &cell : getCells()) {
+    const long &id = cell.getId();
+    if (getCell(id).isInterior() && (pv[id] > threshold)) {
+      markCellForCoarsening(id);
+      counter++;
+    }
+  }
+  update(false,true);
+  return counter;
+}
+
 // Return the neighbours of one point
 std::vector<long> Grid::findQuadrantNeighs(const NPoint &x0, const long id)
 {

src/core/Grid.hpp

@@ -138,6 +138,11 @@ long nbCells() {
  */
 long refineFromRangeVector(std::vector<double> v, double min, double max);
 
+/**
+ * @brief Return elements size Coarsening from a Vector Range Values
+ */
+long coarseFromRangeVector(std::vector<double> v, double threshold);
+
 std::vector<bitpit::adaption::Info> getMapper() {
   return _mapper;
 }