111 lines
2.7 KiB
C++
111 lines
2.7 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file fltMesh.cxx
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* @author drose
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* @date 2001-02-28
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*/
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#include "fltMesh.h"
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#include "fltRecordReader.h"
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#include "fltRecordWriter.h"
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#include "fltHeader.h"
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#include "fltMaterial.h"
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#include "config_flt.h"
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TypeHandle FltMesh::_type_handle;
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/**
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*
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*/
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FltMesh::
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FltMesh(FltHeader *header) : FltGeometry(header) {
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}
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/**
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* Fills in the information in this bead based on the information given in the
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* indicated datagram, whose opcode has already been read. Returns true on
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* success, false if the datagram is invalid.
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*/
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bool FltMesh::
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extract_record(FltRecordReader &reader) {
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if (!FltBeadID::extract_record(reader)) {
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return false;
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}
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DatagramIterator &iterator = reader.get_iterator();
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iterator.skip_bytes(4); // Undocumented padding.
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if (!FltGeometry::extract_record(reader)) {
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return false;
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}
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nassertr(reader.get_opcode() == FO_mesh, false);
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check_remaining_size(iterator);
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return true;
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}
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/**
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* Checks whether the given bead, which follows this bead sequentially in the
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* file, is an ancillary record of this bead. If it is, extracts the relevant
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* information and returns true; otherwise, leaves it alone and returns false.
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*/
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bool FltMesh::
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extract_ancillary(FltRecordReader &reader) {
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if (reader.get_opcode() == FO_local_vertex_pool) {
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_vpool = new FltLocalVertexPool(_header);
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return _vpool->extract_record(reader);
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}
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return FltBeadID::extract_ancillary(reader);
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}
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/**
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* Fills up the current record on the FltRecordWriter with data for this
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* record, but does not advance the writer. Returns true on success, false if
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* there is some error.
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*/
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bool FltMesh::
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build_record(FltRecordWriter &writer) const {
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if (!FltBeadID::build_record(writer)) {
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return false;
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}
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Datagram &datagram = writer.update_datagram();
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datagram.pad_bytes(4); // Undocumented padding.
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if (!FltGeometry::build_record(writer)) {
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return false;
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}
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writer.set_opcode(FO_mesh);
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return true;
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}
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/**
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* Writes whatever ancillary records are required for this record. Returns
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* FE_ok on success, or something else if there is some error.
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*/
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FltError FltMesh::
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write_ancillary(FltRecordWriter &writer) const {
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if (_vpool != nullptr) {
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if (!_vpool->build_record(writer)) {
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assert(!flt_error_abort);
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return FE_bad_data;
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}
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FltError result = writer.advance();
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if (result != FE_ok) {
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return result;
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}
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}
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return FltBeadID::write_ancillary(writer);
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}
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