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 
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  */
31 set_matrix(const LMatrix4d &matrix) {
32  _matrix = matrix;
33 }
34 
35 /**
36  * Directly sets the general matrix.
37  */
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 }
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.
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
void set_matrix(const LMatrix4d &matrix)
Directly sets the general matrix.
A base class for a number of types of ancillary records that follow beads and indicate some kind of a...
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.