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fltVectorRecord.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file fltVectorRecord.cxx
10 * @author drose
11 * @date 2002-08-30
12 */
13
14#include "fltVectorRecord.h"
15#include "fltRecordReader.h"
16#include "fltRecordWriter.h"
17
18TypeHandle FltVectorRecord::_type_handle;
19
20/**
21 *
22 */
23FltVectorRecord::
24FltVectorRecord(FltHeader *header) : FltRecord(header) {
25 _vector.set(0.0f, 0.0f, 0.0f);
26}
27
28/**
29 * Returns the vector value.
30 */
31const LVector3 &FltVectorRecord::
32get_vector() const {
33 return _vector;
34}
35
36/**
37 * Fills in the information in this record based on the information given in
38 * the indicated datagram, whose opcode has already been read. Returns true
39 * on success, false if the datagram is invalid.
40 */
41bool FltVectorRecord::
42extract_record(FltRecordReader &reader) {
43 if (!FltRecord::extract_record(reader)) {
44 return false;
45 }
46
47 nassertr(reader.get_opcode() == FO_vector, false);
48 DatagramIterator &iterator = reader.get_iterator();
49
50 _vector[0] = iterator.get_be_float32();
51 _vector[1] = iterator.get_be_float32();
52 _vector[2] = iterator.get_be_float32();
53
54 check_remaining_size(iterator);
55 return true;
56}
57
58/**
59 * Fills up the current record on the FltRecordWriter with data for this
60 * record, but does not advance the writer. Returns true on success, false if
61 * there is some error.
62 */
63bool FltVectorRecord::
64build_record(FltRecordWriter &writer) const {
65 if (!FltRecord::build_record(writer)) {
66 return false;
67 }
68
69 writer.set_opcode(FO_vector);
70 Datagram &datagram = writer.update_datagram();
71
72 datagram.add_be_float32(_vector[0]);
73 datagram.add_be_float32(_vector[1]);
74 datagram.add_be_float32(_vector[2]);
75
76 return true;
77}
A class to retrieve the individual data elements previously stored in a Datagram.
PN_float32 get_be_float32()
Extracts a 32-bit big-endian single-precision floating-point number.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition datagram.h:38
void add_be_float32(PN_float32 value)
Adds a 32-bit single-precision big-endian floating-point number to the datagram.
Definition datagram.I:200
This is the first bead in the file, the top of the bead hierarchy, and the primary interface to readi...
Definition fltHeader.h:44
This class turns an istream into a sequence of FltRecords by reading a sequence of Datagrams and extr...
FltOpcode get_opcode() const
Returns the opcode associated with the current record.
DatagramIterator & get_iterator()
Returns an iterator suitable for extracting data from the current record.
This class writes a sequence of FltRecords to an ostream, handling opcode and size counts properly.
void set_opcode(FltOpcode opcode)
Sets the opcode associated with the current record.
Datagram & update_datagram()
Returns a modifiable reference to the datagram associated with the current record.
The base class for all kinds of records in a MultiGen OpenFlight file.
Definition fltRecord.h:36
void check_remaining_size(const DatagramIterator &di, const std::string &name=std::string()) const
Checks that the iterator has no bytes left, as it should at the end of a successfully read record.
const LVector3 & get_vector() const
Returns the vector value.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.