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fltTransformTranslate.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 fltTransformTranslate.cxx
10 * @author drose
11 * @date 2000-08-30
12 */
13
15#include "fltRecordReader.h"
16#include "fltRecordWriter.h"
17
18TypeHandle FltTransformTranslate::_type_handle;
19
20/**
21 *
22 */
23FltTransformTranslate::
24FltTransformTranslate(FltHeader *header) : FltTransformRecord(header) {
25 _from.set(0.0, 0.0, 0.0);
26 _delta.set(0.0, 0.0, 0.0);
27}
28
29/**
30 * Defines the translation. The "from" point seems to be pretty much ignored.
31 */
33set(const LPoint3d &from, const LVector3d &delta) {
34 _from = from;
35 _delta = delta;
36
37 recompute_matrix();
38}
39
40/**
41 * Returns the reference point of the translation. This is largely
42 * meaningless.
43 */
45get_from() const {
46 return _from;
47}
48
49/**
50 *
51 */
52const LVector3d &FltTransformTranslate::
53get_delta() const {
54 return _delta;
55}
56
57/**
58 *
59 */
60void FltTransformTranslate::
61recompute_matrix() {
62 _matrix = LMatrix4d::translate_mat(_delta);
63}
64
65/**
66 * Fills in the information in this record based on the information given in
67 * the indicated datagram, whose opcode has already been read. Returns true
68 * on success, false if the datagram is invalid.
69 */
70bool FltTransformTranslate::
71extract_record(FltRecordReader &reader) {
72 if (!FltTransformRecord::extract_record(reader)) {
73 return false;
74 }
75
76 nassertr(reader.get_opcode() == FO_translate, false);
77 DatagramIterator &iterator = reader.get_iterator();
78
79 iterator.skip_bytes(4); // Undocumented additional padding.
80
81 _from[0] = iterator.get_be_float64();
82 _from[1] = iterator.get_be_float64();
83 _from[2] = iterator.get_be_float64();
84 _delta[0] = iterator.get_be_float64();
85 _delta[1] = iterator.get_be_float64();
86 _delta[2] = iterator.get_be_float64();
87
88 // iterator.skip_bytes(4); Undocumented additional padding.
89
90 recompute_matrix();
91
92 check_remaining_size(iterator);
93 return true;
94}
95
96/**
97 * Fills up the current record on the FltRecordWriter with data for this
98 * record, but does not advance the writer. Returns true on success, false if
99 * there is some error.
100 */
101bool FltTransformTranslate::
102build_record(FltRecordWriter &writer) const {
103 if (!FltTransformRecord::build_record(writer)) {
104 return false;
105 }
106
107 writer.set_opcode(FO_translate);
108 Datagram &datagram = writer.update_datagram();
109
110 datagram.pad_bytes(4); // Undocumented additional padding.
111
112 datagram.add_be_float64(_from[0]);
113 datagram.add_be_float64(_from[1]);
114 datagram.add_be_float64(_from[2]);
115 datagram.add_be_float64(_delta[0]);
116 datagram.add_be_float64(_delta[1]);
117 datagram.add_be_float64(_delta[2]);
118
119 // datagram.pad_bytes(4); Undocumented additional padding.
120
121 return true;
122}
A class to retrieve the individual data elements previously stored in a Datagram.
void skip_bytes(size_t size)
Skips over the indicated number of bytes in the datagram.
PN_float64 get_be_float64()
Extracts a 64-bit big-endian 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_float64(PN_float64 value)
Adds a 64-bit big-endian floating-point number to the datagram.
Definition datagram.I:209
void pad_bytes(size_t size)
Adds the indicated number of zero bytes to the datagram.
Definition datagram.cxx:99
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.
A base class for a number of types of ancillary records that follow beads and indicate some kind of a...
const LPoint3d & get_from() const
Returns the reference point of the translation.
void set(const LPoint3d &from, const LVector3d &delta)
Defines the translation.
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.