在一个demo里面可以正确的加载显示贴图纹理 ，但有些问题 现在需要在lib3ds 里面显示贴图文件 现在问题不知道 贴图坐标放在什么地方

// 开始以g_ViewMode模式绘制
  glBegin(g_ViewMode);     
   // 遍历所有的面
   for(int j = 0; j < pObject->numOfFaces; j++)
   {
    // 遍历三角形的所有点
    for(int whichVertex = 0; whichVertex < 3; whichVertex++)
    {
     // 获得面对每个点的索引
     int index = pObject->pFaces[j].vertIndex[whichVertex];
   
     // 给出法向量
     glNormal3f(pObject->pNormals[ index ].x, pObject->pNormals[ index ].y, pObject->pNormals[ index ].z);
    
     // 如果对象具有纹理
     if(pObject->bHasTexture) {

      // 确定是否有UVW纹理坐标
      if(pObject->pTexVerts) {
       glTexCoord2f(pObject->pTexVerts[ index ].x, pObject->pTexVerts[ index ].y);
      }
     } else {

      if(g_3DModel.pMaterials.size() && pObject->materialID >= 0)
      {
       BYTE *pColor = g_3DModel.pMaterials[pObject->materialID].color;
       glColor3ub(pColor[0], pColor[1], pColor[2]);
      }
     }
     glVertex3f(pObject->pVerts[ index ].x, pObject->pVerts[ index ].y, pObject->pVerts[ index ].z);
    }
   }

  glEnd();        // 绘制结束

这个是demo里面的代码  现在需要在 lib3ds 下显示文理 lib3ds 的render 代码如下

if (!node->user_id)
   {
    mesh = lib3ds_file_mesh_for_node(m_pModel, node);
    assert(mesh);
    if (!mesh) {
     return;
    }

    node->user_id = glGenLists(1);
    glNewList(node->user_id, GL_COMPILE);

    norm_verts = (Lib3dsVector*) malloc(3*sizeof(Lib3dsVector)*mesh->nfaces);
    norm_faces = (Lib3dsVector*) malloc(sizeof(Lib3dsVector)*mesh->nfaces);    

    lib3ds_matrix_copy(M, mesh->matrix);
    lib3ds_matrix_inv(M);
    glMultMatrixf(&M[0][0]);

    lib3ds_mesh_calculate_face_normals(mesh, (float (*)[3])norm_faces);
    lib3ds_mesh_calculate_vertex_normals(mesh, (float (*)[3])norm_verts);

    for (fi=0; fi<mesh->nfaces; ++fi) {
     face = &(mesh->faces[fi]);
     mat = 0;

     if (face->material >= 0 && face->material < m_pModel->nmaterials)
      mat = m_pModel->materials[face->material];

     if (mat)
     {
      // 使用材质
      float s = pow(2, 10.0*mat->shininess);
      if (s>128.0) s = 128.0f;

      glMaterialfv(GL_FRONT, GL_AMBIENT, mat->ambient);
      glMaterialfv(GL_FRONT, GL_DIFFUSE, mat->diffuse);
      glMaterialfv(GL_FRONT, GL_SPECULAR, mat->specular);
      glMaterialf(GL_FRONT, GL_SHININESS, s);
     }
     else {
      // 使用贴图
      float a[]={0.2, 0.2, 0.2, 1.0};
      float d[]={0.8, 0.8, 0.8, 1.0};
      float s[]={0.0, 0.0, 0.0, 1.0};
      glMaterialfv(GL_FRONT, GL_AMBIENT, a);
      glMaterialfv(GL_FRONT, GL_DIFFUSE, d);
      glMaterialfv(GL_FRONT, GL_SPECULAR, s);
     }

     // Draw tri-face
     glBegin(GL_TRIANGLES);

     glNormal3fv(norm_faces[fi].v); // face normal

     for (i=0; i<3; ++i) {
      glNormal3fv(norm_verts[3*fi+i].v); // vertex normal
      glVertex3fv(mesh->vertices[face->index[i]]);
     }
     glEnd();
    }
    free(norm_faces);
    free(norm_verts);

    glEndList();
   }

   if (node->user_id) {
    glPushMatrix();
    meshData = (Lib3dsMeshInstanceNode*) node;

    glMultMatrixf(&node->matrix[0][0]);
    glTranslatef(-meshData->pivot[0], -meshData->pivot[1], -meshData->pivot[2]);
    glCallList(node->user_id);

    // glutSolidSphere(50.0, 20,20);
    glPopMatrix();
   }
  }

不知道贴纹理坐标的地方在哪儿？怎么贴 希望知道的解答下