Panda3D
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 
18 TypeHandle FltVectorRecord::_type_handle;
19 
20 /**
21  *
22  */
23 FltVectorRecord::
24 FltVectorRecord(FltHeader *header) : FltRecord(header) {
25  _vector.set(0.0f, 0.0f, 0.0f);
26 }
27 
28 /**
29  * Returns the vector value.
30  */
31 const LVector3 &FltVectorRecord::
32 get_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  */
41 bool FltVectorRecord::
42 extract_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  */
63 bool FltVectorRecord::
64 build_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.
Definition: fltRecord.cxx:254
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.