Panda3D

fltTransformGeneralMatrix.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 fltTransformGeneralMatrix.cxx
10 * @author drose
11 * @date 2000-08-24
12 */
13
14 #include "fltTransformGeneralMatrix.h"
15 #include "fltRecordReader.h"
16 #include "fltRecordWriter.h"
17
18 TypeHandle FltTransformGeneralMatrix::_type_handle;
19
20 /**
21 *
22 */
23 FltTransformGeneralMatrix::
24 FltTransformGeneralMatrix(FltHeader *header) : FltTransformRecord(header) {
25 }
26
27 /**
28 * Directly sets the general matrix.
29 */
30 void FltTransformGeneralMatrix::
31 set_matrix(const LMatrix4d &matrix) {
32 _matrix = matrix;
33 }
34
35 /**
36 * Directly sets the general matrix.
37 */
38 void FltTransformGeneralMatrix::
39 set_matrix(const LMatrix4f &matrix) {
40 _matrix = LCAST(double, matrix);
41 }
42
43 /**
44 * Fills in the information in this record based on the information given in
45 * the indicated datagram, whose opcode has already been read. Returns true
46 * on success, false if the datagram is invalid.
47 */
48 bool FltTransformGeneralMatrix::
49 extract_record(FltRecordReader &reader) {
50 if (!FltTransformRecord::extract_record(reader)) {
51 return false;
52 }
53
54 nassertr(reader.get_opcode() == FO_general_matrix, false);
55 DatagramIterator &iterator = reader.get_iterator();
56
57 for (int r = 0; r < 4; r++) {
58 for (int c = 0; c < 4; c++) {
59 _matrix(r, c) = iterator.get_be_float32();
60 }
61 }
62
63 check_remaining_size(iterator);
64 return true;
65 }
66
67 /**
68 * Fills up the current record on the FltRecordWriter with data for this
69 * record, but does not advance the writer. Returns true on success, false if
70 * there is some error.
71 */
72 bool FltTransformGeneralMatrix::
73 build_record(FltRecordWriter &writer) const {
74 if (!FltTransformRecord::build_record(writer)) {
75 return false;
76 }
77
78 writer.set_opcode(FO_general_matrix);
79 Datagram &datagram = writer.update_datagram();
80
81 for (int r = 0; r < 4; r++) {
82 for (int c = 0; c < 4; c++) {
83 datagram.add_be_float32(_matrix(r, c));
84 }
85 }
86
87 return true;
88 }
DatagramIterator
A class to retrieve the individual data elements previously stored in a Datagram.
Definition: datagramIterator.h:27
DatagramIterator::get_be_float32
PN_float32 get_be_float32()
Extracts a 32-bit big-endian single-precision floating-point number.
Definition: datagramIterator.I:369
Datagram
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition: datagram.h:38
Datagram::add_be_float32
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
FltHeader
This is the first bead in the file, the top of the bead hierarchy, and the primary interface to readi...
Definition: fltHeader.h:44
FltRecordReader
This class turns an istream into a sequence of FltRecords by reading a sequence of Datagrams and extr...
Definition: fltRecordReader.h:30
FltRecordReader::get_opcode
FltOpcode get_opcode() const
Returns the opcode associated with the current record.
Definition: fltRecordReader.cxx:55
FltRecordReader::get_iterator
DatagramIterator & get_iterator()
Returns an iterator suitable for extracting data from the current record.
Definition: fltRecordReader.cxx:64
FltRecordWriter
This class writes a sequence of FltRecords to an ostream, handling opcode and size counts properly.
Definition: fltRecordWriter.h:31
FltRecordWriter::set_opcode
void set_opcode(FltOpcode opcode)
Sets the opcode associated with the current record.
Definition: fltRecordWriter.cxx:47
FltRecordWriter::update_datagram
Datagram & update_datagram()
Returns a modifiable reference to the datagram associated with the current record.
Definition: fltRecordWriter.cxx:66
FltRecord::check_remaining_size
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
FltTransformGeneralMatrix::set_matrix
void set_matrix(const LMatrix4d &matrix)
Directly sets the general matrix.
Definition: fltTransformGeneralMatrix.cxx:31
FltTransformRecord
A base class for a number of types of ancillary records that follow beads and indicate some kind of a...
Definition: fltTransformRecord.h:28
TypeHandle
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:81
fltRecordReader.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
fltRecordWriter.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
fltTransformGeneralMatrix.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.