NvTriStrip.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Text;
   4 using System.Runtime.InteropServices;
   5
   6 namespace Tso2MqoGui
   7 {
   8     public enum PrimType
   9     {
  10         PT_LIST,
  11         PT_STRIP,
  12         PT_FAN
  13     }
  14
  15     public unsafe struct PrimitiveGroup
  16     {
  17         public PrimType type;
  18         public uint numIndices;
  19         public ushort* indices;
  20     }
  21
  22     public unsafe class NvTriStrip
  23     {
  24         public static ushort[] Optimize(ushort[] triangles)
  25         {
  26             fixed (ushort* p = &triangles[0])
  27             {
  28                 SetStitchStrips(true);
  29
  30                 PrimitiveGroup* pg = null;
  31                 ushort num = 0;
  32                 bool rc = GenerateStrips(p, (uint)triangles.Length, &pg, &num, false);
  33
  34                 if (!rc) throw new Exception();
  35
  36                 try
  37                 {
  38                     if (num != 1) throw new Exception();
  39                     if (pg[0].type != PrimType.PT_STRIP) throw new Exception();
  40
  41                     ushort[] nidx = new ushort[pg[0].numIndices];
  42
  43                     for (int i = 0; i < nidx.Length; ++i)
  44                         nidx[i] = pg[0].indices[i];
  45
  46                     return nidx;
  47                 }
  48                 finally
  49                 {
  50                     DeletePrimitiveGroup(pg);
  51                 }
  52             }
  53         }
  54
  55         //[DllImport("NvTriStrip.dll")] public extern static int GetPicture(byte* file, int len, uint flag, out IntPtr pHBInfo, out IntPtr pHBm, void* lpPrgressCallback, uint lData);
  56         [DllImport("NvTriStrip.dll")]
  57         public extern static void EnableRestart(uint _restartVal);
  58         [DllImport("NvTriStrip.dll")]
  59         public extern static void DisableRestart();
  60         [DllImport("NvTriStrip.dll")]
  61         public extern static void SetListsOnly(bool _bListsOnly);
  62         [DllImport("NvTriStrip.dll")]
  63         public extern static void SetCacheSize(uint _cacheSize);
  64         [DllImport("NvTriStrip.dll")]
  65         public extern static void SetStitchStrips(bool _bStitchStrips);
  66         [DllImport("NvTriStrip.dll")]
  67         public extern static void SetMinStripSize(uint _minStripSize);
  68         //[DllImport("NvTriStrip.dll")] public extern static void Cleanup(NvStripInfoVec& tempStrips, NvFaceInfoVec& tempFaces);
  69         [DllImport("NvTriStrip.dll")]
  70         public extern static bool SameTriangle(ushort firstTri0, ushort firstTri1, ushort firstTri2, ushort secondTri0, ushort secondTri1, ushort secondTri2);
  71         //[DllImport("NvTriStrip.dll")] public extern static bool TestTriangle(ushort v0, ushort v1, ushort v2, const std::vector<NvFaceInfo>* in_bins, const int NUMBINS);
  72         [DllImport("NvTriStrip.dll")]
  73         public extern static void DeletePrimitiveGroup(PrimitiveGroup* primGroups);
  74         [DllImport("NvTriStrip.dll")]
  75         public extern static bool GenerateStrips(ushort* in_indices, uint in_numIndices, PrimitiveGroup** primGroups, ushort* numGroups, bool validateEnabled);
  76         [DllImport("NvTriStrip.dll")]
  77         public extern static void RemapIndices(PrimitiveGroup* in_primGroups, ushort numGroups, ushort numVerts, PrimitiveGroup** remappedGroups);
  78     }
  79 }