/* Create new external mesh */
static void exporter_InitGeomArrays(ExportMeshData *export_data,
int num_verts, int num_edges,
int num_loops, int num_polys)
{
DerivedMesh *dm = CDDM_new(num_verts, num_edges, 0,
num_loops, num_polys);
DerivedMesh *dm_left = export_data->dm_left,
*dm_right = export_data->dm_right;
/* Mask for custom data layers to be merged from operands. */
CustomDataMask merge_mask = CD_MASK_DERIVEDMESH & ~CD_MASK_ORIGINDEX;
export_data->dm = dm;
export_data->mvert = dm->getVertArray(dm);
export_data->medge = dm->getEdgeArray(dm);
export_data->mloop = dm->getLoopArray(dm);
export_data->mpoly = dm->getPolyArray(dm);
/* Allocate layers for UV layers and vertex colors.
* Without this interpolation of those data will not happen.
*/
allocate_custom_layers(&dm->loopData, CD_MLOOPCOL, num_loops,
CustomData_number_of_layers(&dm_left->loopData, CD_MLOOPCOL));
allocate_custom_layers(&dm->loopData, CD_MLOOPUV, num_loops,
CustomData_number_of_layers(&dm_left->loopData, CD_MLOOPUV));
allocate_custom_layers(&dm->loopData, CD_MLOOPCOL, num_loops,
CustomData_number_of_layers(&dm_right->loopData, CD_MLOOPCOL));
allocate_custom_layers(&dm->loopData, CD_MLOOPUV, num_loops,
CustomData_number_of_layers(&dm_right->loopData, CD_MLOOPUV));
/* Merge custom data layers from operands.
*
* Will only create custom data layers for all the layers which appears in
* the operand. Data for those layers will not be allocated or initialized.
*/
CustomData_merge(&dm_left->polyData, &dm->polyData, merge_mask, CD_DEFAULT, num_polys);
CustomData_merge(&dm_right->polyData, &dm->polyData, merge_mask, CD_DEFAULT, num_polys);
CustomData_merge(&dm_left->edgeData, &dm->edgeData, merge_mask, CD_DEFAULT, num_edges);
CustomData_merge(&dm_right->edgeData, &dm->edgeData, merge_mask, CD_DEFAULT, num_edges);
export_data->vert_origindex = dm->getVertDataArray(dm, CD_ORIGINDEX);
export_data->edge_origindex = dm->getEdgeDataArray(dm, CD_ORIGINDEX);
export_data->poly_origindex = dm->getPolyDataArray(dm, CD_ORIGINDEX);
export_data->loop_origindex = dm->getLoopDataArray(dm, CD_ORIGINDEX);
}
