高分求用OpenGL写的OpenMesh显示程序

你可以先便利所有的面，然后将面存放在一个队列中，然后使用列表来实现，下面是核心代码。
void RenderingEntity::buildPointsList()
{
// if mesh is not NULL and faces is not empty, get the points first
if (mesh && (!renderingFacesempty()))
{
renderingPointsclear();
std::set<Mesh::FaceHandle>::iterator it;
Mesh::FaceVertexIter fv_it;
for (it = renderingFacesbegin(); it != renderingFacesend(); ++ it)
{
for (fv_it = mesh->fv_iter(it); fv_it; ++ fv_it)
{
renderingPointsinsert(mesh->point(fv_it));
}
}
}
// build the list
renderingList = glGenLists(1);
glNewList(renderingList, GL_COMPILE);
setMaterial(matRendering);
for (std::set<OpenMesh::Vec3d>::iterator it = renderingPointsbegin(); it != renderingPointsend(); ++ it)
{
//glBegin(GL_POINTS);
//glVertex3dv((it)data());
//glEnd();
renderPoint((it), SceneInterface::sphereRadius);
}
glEndList();
}
上面代码负责存入集合
下面代码用于显示
void RenderingEntity::renderingFaceEntities()
{
std::set<Mesh::FaceHandle>::iterator it;
Mesh::FaceVertexIter fv_it;
if (!mesh->has_vertex_normals())
{
mesh->update_normals();
}
// rendering the faces
glBegin(GL_TRIANGLES);
for (it = renderingFacesbegin(); it != renderingFacesend(); ++ it)
{
if (renderingMode & (CAD_RENDERING_MODE_SOLID_FLAT | CAD_RENDERING_MODE_WIRE_FLAT))
{
glNormal3dv(mesh->normal(it)data());
}
for (fv_it = mesh->fv_iter(it); fv_it; ++ fv_it)
{
if (!(renderingMode & (CAD_RENDERING_MODE_SOLID_FLAT | CAD_RENDERING_MODE_WIRE_FLAT)))
{
glNormal3dv(mesh->normal(fv_it)data());
}
glVertex3dv(mesh->point(fv_it)data());
}
}
glEnd();
}

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