c++ - 获取实例化 GeomObject 的网格

Question

如何从实例化的 GeomObject 获取网格？

在 maxscript 中我这样做:

gsphere = createInstance geosphere radius:1 segs:4
gsphere_mesh = gsphere.mesh

这是翻译成 C++ 的 maxscript 的第一行:

GeomObject *GSphere = (GeomObject*)ip->CreateInstance(GEOMOBJECT_CLASS_ID, GSPHERE_CLASS_ID);
GSphere->GetParamBlockByID(2)->SetValue(0, 0, 1);
GSphere->GetParamBlockByID(2)->SetValue(1, 0, 4);

现在，我需要获取网格，但我不知道如何获取。没有“GetMesh()”或“GetTriMesh()”函数。

感谢您的帮助。

Answer 1

要访问节点的网格，您可以使用如下内容:

for (int t = 0; maxscene->NumChildren() > t; t++)
    {
        INode* currNode = maxscene->GetChildNode(t);
        Object* obj;
        ObjectState os = currNode->EvalWorldState(GetCOREInterface()->GetTime());
        obj = os.obj;

        switch (os.obj->SuperClassID())
        {
        case GEOMOBJECT_CLASS_ID:
            TriObject *p_triobj = NULL;
        BOOL fConvertedToTriObject = obj->CanConvertToType(triObjectClassID) && (p_triobj = (TriObject*)obj->ConvertToType(0, triObjectClassID)) != NULL;
            if (!fConvertedToTriObject)
            {
                mprintf(L"Error: Could not triangulate object.);
                return false;
            }
            Mesh *p_trimesh = &p_triobj->mesh;
            int faceCount = p_trimesh->getNumFaces();
            //work with the mesh here.
        }
    }