继续啊

int CScape::RenderPatch( int i ){int FacesRendered = 0;static unsigned short Indices[INDICES_LOD_HIGH];ScapePatch* Patch = &m_Patches[i];unsigned short* IndexPtr;glVertexPointer( 3, GL_FLOAT, sizeof(ScapeVertex), m_Buffer->GetPointer() + (PATCH_VERTS * i * sizeof(ScapeVertex)) );int CurIndices;//unsigned short* IndexPtr;if( Patch->LoD == SCAPE_LOD_HIGH ){CurIndices = INDICES_LOD_HIGH;IndexPtr = m_Indices[0];}else if( Patch->LoD == SCAPE_LOD_MED ){CurIndices = INDICES_LOD_MED;IndexPtr = m_Indices[1];}else if( Patch->LoD == SCAPE_LOD_LOW ){CurIndices = INDICES_LOD_LOW;IndexPtr = m_Indices[2];}else if( Patch->LoD == SCAPE_LOD_XTRALOW ){CurIndices = INDICES_LOD_XTRALOW;IndexPtr = m_Indices[3];}else if( Patch->LoD == SCAPE_LOD_MIN ){CurIndices = INDICES_LOD_MIN;IndexPtr = m_Indices[4];}memcpy( Indices, IndexPtr, CurIndices * sizeof(unsigned short) );//GenIndices( Patch->LoD, Indices );ScapePatch* Other;//ok, now to work out some adjacency LoD issues//If an adjacent patch is at a lower LoD, shift indices around//to avoid cracks in the landscape.if( i >= m_HeightPatches ){Other = &m_Patches[i-m_HeightPatches];if( Other->LoD > Patch->LoD ){//the patch to the left is at a lower LoD//we need to reduce our left detail levelfor( int n = 0; n < CurIndices; ++n ){if( (Indices[n] < (PATCH_SIZE+1)) && (Indices[n] % Other->LoD) != 0 ){Indices[n] -= Indices[n] % Other->LoD;}}}}if( i <= m_NumPatches - m_HeightPatches ){Other = &m_Patches[i+m_HeightPatches];if( Other->LoD > Patch->LoD ){//Patch to the right is at a lower LoD//reduce right edge detailfor( int n = 0; n < CurIndices; ++n ){if( (Indices[n] > ((PATCH_SIZE+1)*PATCH_SIZE) ) && (Indices[n] % Other->LoD) != 0 ){Indices[n] -= Indices[n] % Other->LoD;}}}}if( i % m_HeightPatches ){Other = &m_Patches[i-1];if( Other->LoD > Patch->LoD ){//the patch to the top is at a lower LoD//we need to reduce our top detail levelfor( int n = 0; n < CurIndices; ++n ){if( (Indices[n] % (PATCH_SIZE+1) == 0) && (Indices[n] % (Other->LoD * (PATCH_SIZE+1))) != 0){Indices[n] -= (PATCH_SIZE+1) * Indices[n] % (Other->LoD * (PATCH_SIZE+1));}}}}if( (i + 1) % m_HeightPatches ){Other = &m_Patches[i+1];if( Other->LoD > Patch->LoD ){//the patch to the bottom is at a lower LoD//we need to reduce our bottom detail levelfor( int n = 0; n < CurIndices; ++n ){if( ((Indices[n] + 1) % (PATCH_SIZE+1) == 0) && (Indices[n] % (Other->LoD * (PATCH_SIZE+1))) != 0){Indices[n] -= (PATCH_SIZE+1) * Indices[n] % (Other->LoD * (PATCH_SIZE+1));}}}}glDrawElements( GL_TRIANGLES, CurIndices, GL_UNSIGNED_SHORT, Indices );FacesRendered = CurIndices / 3;return FacesRendered;}