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fltLightSourceDefinition.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 fltLightSourceDefinition.cxx
10 * @author drose
11 * @date 2000-08-26
12 */
13
15#include "fltRecordReader.h"
16#include "fltRecordWriter.h"
17
18TypeHandle FltLightSourceDefinition::_type_handle;
19
20/**
21 *
22 */
23FltLightSourceDefinition::
24FltLightSourceDefinition(FltHeader *header) : FltRecord(header) {
25 _light_index = 0;
26 _ambient.set(0.0, 0.0, 0.0, 1.0);
27 _diffuse.set(1.0, 1.0, 1.0, 1.0);
28 _specular.set(0.0, 0.0, 0.0, 1.0);
29 _light_type = LT_infinite;
30 _exponential_dropoff = 1.0;
31 _cutoff_angle = 180.0;
32 _yaw = 0.0;
33 _pitch = 0.0;
34 _constant_coefficient = 0.0;
35 _linear_coefficient = 0.0;
36 _quadratic_coefficient = 1.0;
37 _modeling_light = false;
38}
39
40/**
41 * Fills in the information in this record based on the information given in
42 * the indicated datagram, whose opcode has already been read. Returns true
43 * on success, false if the datagram is invalid.
44 */
45bool FltLightSourceDefinition::
46extract_record(FltRecordReader &reader) {
47 if (!FltRecord::extract_record(reader)) {
48 return false;
49 }
50
51 nassertr(reader.get_opcode() == FO_light_definition, false);
52 DatagramIterator &iterator = reader.get_iterator();
53
54 _light_index = iterator.get_be_int32();
55 iterator.skip_bytes(2*4);
56 _light_name = iterator.get_fixed_string(20);
57 iterator.skip_bytes(4);
58 _ambient[0] = iterator.get_be_float32();
59 _ambient[1] = iterator.get_be_float32();
60 _ambient[2] = iterator.get_be_float32();
61 _ambient[3] = iterator.get_be_float32();
62 _diffuse[0] = iterator.get_be_float32();
63 _diffuse[1] = iterator.get_be_float32();
64 _diffuse[2] = iterator.get_be_float32();
65 _diffuse[3] = iterator.get_be_float32();
66 _specular[0] = iterator.get_be_float32();
67 _specular[1] = iterator.get_be_float32();
68 _specular[2] = iterator.get_be_float32();
69 _specular[3] = iterator.get_be_float32();
70 _light_type = (LightType)iterator.get_be_int32();
71 iterator.skip_bytes(4*10);
72 _exponential_dropoff = iterator.get_be_float32();
73 _cutoff_angle = iterator.get_be_float32();
74 _yaw = iterator.get_be_float32();
75 _pitch = iterator.get_be_float32();
76 _constant_coefficient = iterator.get_be_float32();
77 _linear_coefficient = iterator.get_be_float32();
78 _quadratic_coefficient = iterator.get_be_float32();
79 _modeling_light = (iterator.get_be_int32() != 0);
80 iterator.skip_bytes(4*19);
81
82 check_remaining_size(iterator);
83 return true;
84}
85
86/**
87 * Fills up the current record on the FltRecordWriter with data for this
88 * record, but does not advance the writer. Returns true on success, false if
89 * there is some error.
90 */
91bool FltLightSourceDefinition::
92build_record(FltRecordWriter &writer) const {
93 if (!FltRecord::build_record(writer)) {
94 return false;
95 }
96
97 writer.set_opcode(FO_light_definition);
98 Datagram &datagram = writer.update_datagram();
99
100 datagram.add_be_int32(_light_index);
101 datagram.pad_bytes(2*4);
102 datagram.add_fixed_string(_light_name, 20);
103 datagram.pad_bytes(4);
104 datagram.add_be_float32(_ambient[0]);
105 datagram.add_be_float32(_ambient[1]);
106 datagram.add_be_float32(_ambient[2]);
107 datagram.add_be_float32(_ambient[3]);
108 datagram.add_be_float32(_diffuse[0]);
109 datagram.add_be_float32(_diffuse[1]);
110 datagram.add_be_float32(_diffuse[2]);
111 datagram.add_be_float32(_diffuse[3]);
112 datagram.add_be_float32(_specular[0]);
113 datagram.add_be_float32(_specular[1]);
114 datagram.add_be_float32(_specular[2]);
115 datagram.add_be_float32(_specular[3]);
116 datagram.add_be_int32(_light_type);
117 datagram.pad_bytes(4*10);
118 datagram.add_be_float32(_exponential_dropoff);
119 datagram.add_be_float32(_cutoff_angle);
120 datagram.add_be_float32(_yaw);
121 datagram.add_be_float32(_pitch);
122 datagram.add_be_float32(_constant_coefficient);
123 datagram.add_be_float32(_linear_coefficient);
124 datagram.add_be_float32(_quadratic_coefficient);
125 datagram.add_be_int32(_modeling_light);
126 datagram.pad_bytes(4*19);
127
128 return true;
129}
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.
int32_t get_be_int32()
Extracts a signed 32-bit big-endian integer.
PN_float32 get_be_float32()
Extracts a 32-bit big-endian single-precision floating-point number.
std::string get_fixed_string(size_t size)
Extracts a fixed-length string.
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_int32(int32_t value)
Adds a signed 32-bit big-endian integer to the datagram.
Definition datagram.I:154
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
void add_fixed_string(const std::string &str, size_t size)
Adds a fixed-length string to the datagram.
Definition datagram.I:263
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.
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.
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.