add lab3

lab3/writeGrid2DOFF.h

@@ -0,0 +1,57 @@
+// Functions to write grid2DPoints3D as a Geomview .off file.
+
+#ifndef WRITE_GRID2D_OFF_H
+#define WRITE_GRID2D_OFF_H
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include "grid2DPoints3D.h"
+
+
+// ********************************************************************************
+// Class WRITE_GRID2D_OFF
+// ********************************************************************************
+
+/// A class for writing GRID2D_POINTS3D as a Geomview .off file.
+class WRITE_GRID2D_OFF {
+
+public:
+
+    const std::string OFF_HEADER = "OFF";
+
+    WRITE_GRID2D_OFF() {}
+
+    std::string Header() const { return OFF_HEADER; }
+
+    /// Write the OFF file header line.
+    void WriteHeader(std::ostream& file) const;
+
+    /// Write a comment line.
+    void WriteComment(std::ostream& file, const std::string& msg) const;
+
+    /// Write the counts: num_points, num_quads, 0 (edges).
+    void WriteNumElements(std::ostream& file,
+                          const GRID2D_POINTS3D& grid2D) const;
+
+    /// Write the coordinates of all grid points.
+    void WritePointCoordinates(std::ostream& file,
+                                const GRID2D_POINTS3D& grid2D) const;
+
+    /// Write the grid quadrilaterals.
+    void WriteQuadrilaterals(std::ostream& file,
+                              const GRID2D_POINTS3D& grid2D) const;
+
+    /// Write grid2D to an open Geomview .off file stream.
+    void Write(std::ostream& file,
+               const GRID2D_POINTS3D& grid2D,
+               const std::vector<std::string>& comment_list) const;
+
+    /// Open filename and write grid2D in Geomview .off format.
+    void OpenAndWrite(const std::string& filename,
+                      const GRID2D_POINTS3D& grid2D,
+                      const std::vector<std::string>& comment_list) const;
+};
+
+#endif // WRITE_GRID2D_OFF_H