初始化内容

third/OpenMesh/Doc/Tutorial/03-properties/smooth.cc

@@ -0,0 +1,57 @@
+#include <OpenMesh/Core/IO/MeshIO.hh>
+#include <OpenMesh/Core/Mesh/DefaultTriMesh.hh>
+#include <OpenMesh/Core/Utils/PropertyManager.hh>
+
+#include <iostream>
+#include <vector>
+
+using MyMesh = OpenMesh::TriMesh;
+
+int main(int argc, char** argv)
+{
+    // Read command line options
+    MyMesh mesh;
+    if (argc != 4) {
+        std::cerr << "Usage: " << argv[0] << " #iterations infile outfile" << std::endl;
+        return 1;
+    }
+    const int iterations = argv[1];
+    const std::string infile = argv[2];
+    const std::string outfile = argv[3];
+    
+    // Read mesh file
+    if (!OpenMesh::IO::read_mesh(mesh, infile)) {
+        std::cerr << "Error: Cannot read mesh from " << infile << std::endl;
+        return 1;
+    }
+
+    {
+      // Add a vertex property storing the computed centers of gravity
+      auto cog = OpenMesh::VProp<MyMesh::Point>(mesh);
+
+      // Smooth the mesh several times
+      for (int i = 0; i < iterations; ++i) {
+          // Iterate over all vertices to compute centers of gravity
+          for (const auto& vh : mesh.vertices()) {
+              cog[vh] = {0,0,0};
+              int valence = 0;
+              // Iterate over all 1-ring vertices around vh
+              for (const auto& vvh : mesh.vv_range(vh)) {
+                  cog[vh] += mesh.point(vvh);
+                  ++valence;
+              }
+              cog[vh] /= valence;
+          }
+          // Move all vertices to the previously computed positions
+          for (const auto& vh : mesh.vertices()) {
+              mesh.point(vh) = cog[vh];
+          }
+      }
+    } // The cog vertex property is removed from the mesh at the end of this scope
+    
+    // Write mesh file
+    if (!OpenMesh::IO::read_mesh(mesh, outfile)) {
+        std::cerr << "Error: Cannot write mesh to " << outfile << std::endl;
+        return 1;
+    }
+}