PlyManager.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace OctreeTest
{
public class PlyManager
{
    private static void AWriteV(StreamWriter sw, double v1, double v2, double v3, byte r, byte g, byte b)
    {
        int r1 = (int)r;
        int g1 = (int)g;
        int b1 = (int)b;
        sw.Write(string.Format("{0} {1} {2} {3} {4} {5}\n", v1.ToString("0.0"), v2.ToString("0.0"), v3.ToString("0.0"), r1, g1, b1));
    }
    private static void AWriteF(StreamWriter sw, int i1, int i2, int i3)
    {
        sw.Write(string.Format("{0} {1} {2} {3}\n", 3, i1, i2, i3));
    }
    public static void Output(Mesh mesh, string filePath)
    {
        FileStream fs = new FileStream(filePath, FileMode.Create);
        StreamWriter sw = new StreamWriter(fs, Encoding.Default);
        sw.Write("ply\n");
        sw.Write("format ascii 1.0\n");
        sw.Write("comment VCGLIB generated\n");
        sw.Write(string.Format("element vertex {0}\n", mesh.Vertices.Count));
        sw.Write("property float x\n");
        sw.Write("property float y\n");
        sw.Write("property float z\n");
        sw.Write("property uchar red\n");
        sw.Write("property uchar green\n");
        sw.Write("property uchar blue\n");
        sw.Write(string.Format("element face {0}\n", mesh.Faces.Count));
        sw.Write("property list int int vertex_indices\n");
        sw.Write("end_header\n");
        for (int i = 0; i < mesh.Vertices.Count; i++)
        {
            AWriteV(sw, mesh.Vertices[i].X, mesh.Vertices[i].Y, mesh.Vertices[i].Z, 255, 255, 255);
        }
        for (int i = 0; i < mesh.Faces.Count; i++)
        {
            AWriteF(sw, mesh.Faces[i].P0Index, mesh.Faces[i].P1Index, mesh.Faces[i].P2Index);
        }
        sw.Close();
        fs.Close();
    }
}
}