Add a call to explicitly release the memory

pyfqmr/Simplify.h

@@ -332,6 +332,7 @@ namespace Simplify
   void update_triangles(int i0,Vertex &v,std::vector<int> &deleted,int &deleted_triangles);
   void update_mesh(int iteration);
   void compact_mesh();
+  void release_memory();
   //
   // Main simplification function
   //
@@ -778,6 +779,13 @@ namespace Simplify
     vertices.resize(dst);
   }
 
+  void release_memory()
+  {
+    std::vector<Triangle>().swap(triangles);
+    std::vector<Vertex>().swap(vertices);
+    std::vector<Ref>().swap(refs);
+  }
+
   // Error between vertex and Quadric
 
   double vertex_error(SymetricMatrix q, double x, double y, double z)

pyfqmr/Simplify.pyx

@@ -33,6 +33,7 @@ cdef extern from "Simplify.h" namespace "Simplify" :
     vector[vector[int]] getFaces()
     vector[vector[double]] getVertices()
     vector[vector[double]] getNormals()
+    void release_memory()
     cdef cppclass Triangle:
         int v[3]
         int attr
@@ -91,6 +92,9 @@ cdef class Simplify :
 
         return verts, faces, norms
 
+    def clear(self):
+        release_memory()
+
     cpdef void setMesh(self, vertices_np, faces_np, face_colors=None):
         """Method to set the mesh of the simplifier object.