2. VtxGroup Area
| VtxGroupHeader | u32 | vtx_group_tag |
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| u32 | this_vtx_group_index | |
| u32 | vtx_group_header_size | |
| u32 | vtx_group_size | |
| u32 | vtx_group_name_index | |
| u32 | vtx_num | |
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Figure: VtxGroup Area Memory Map
| u32 vtx_group_tag |
Tag indicating VtxGroup. Set the following flag.
TAG_VTX_GROUP 0x00040100 |
| u32 this_vtx_group_index | Index number of this VtxGroup. |
| u32 vtx_group_header_size | Size of this VtxGroupHeader. |
| u32 vtx_group_size | Size of this VtxGroup. |
| u32 vtx_group_name_index | Index number of VtxGroup name in NameList. |
| u32 vtx_num | Total number of Vtx contained in this VtxGroup. |
| Vtx | Area for one vertex data |