Panda3D

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eggAttributes.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 eggAttributes.cxx
10 * @author drose
11 * @date 1999-01-16
12 */
13
14#include "eggAttributes.h"
15#include "eggParameters.h"
16#include "eggMorph.h"
17#include "eggMorphList.h"
18
19#include "indent.h"
20
21 TypeHandle EggAttributes::_type_handle;
22
23
24/**
25 *
26 */
27EggAttributes::
28EggAttributes() {
29 _flags = 0;
30}
31
32/**
33 *
34 */
35EggAttributes::
36EggAttributes(const EggAttributes &copy) {
37 (*this) = copy;
38}
39
40/**
41 *
42 */
43 EggAttributes &EggAttributes::
44operator = (const EggAttributes &copy) {
45 _flags = copy._flags;
46 _normal = copy._normal;
47 _color = copy._color;
48 _dnormals = copy._dnormals;
49 _drgbas = copy._drgbas;
50 return *this;
51}
52
53/**
54 *
55 */
56EggAttributes::
57~EggAttributes() {
58}
59
60
61/**
62 * Writes the attributes to the indicated output stream in Egg format.
63 */
64 void EggAttributes::
65 write(std::ostream &out, int indent_level) const {
66 if (has_normal()) {
67 if (_dnormals.empty()) {
68 indent(out, indent_level)
69 << "<Normal> { " << get_normal() << " }\n";
70 } else {
71 indent(out, indent_level) << "<Normal> {\n";
72 indent(out, indent_level + 2) << get_normal() << "\n";
73 _dnormals.write(out, indent_level + 2, "<DNormal>", 3);
74 indent(out, indent_level) << "}\n";
75 }
76 }
77 if (has_color()) {
78 if (_drgbas.empty()) {
79 indent(out, indent_level)
80 << "<RGBA> { " << get_color() << " }\n";
81 } else {
82 indent(out, indent_level) << "<RGBA> {\n";
83 indent(out, indent_level + 2) << get_color() << "\n";
84 _drgbas.write(out, indent_level + 2, "<DRBGA>", 4);
85 indent(out, indent_level) << "}\n";
86 }
87 }
88}
89
90
91/**
92 * An ordering operator to compare two vertices for sorting order. This
93 * imposes an arbitrary ordering useful to identify unique vertices.
94 */
95 int EggAttributes::
96 compare_to(const EggAttributes &other) const {
97 if (_flags != other._flags) {
98 return (int)_flags - (int)other._flags;
99 }
100
101 if (has_normal()) {
102 int compare =
103 _normal.compare_to(other._normal, egg_parameters->_normal_threshold);
104 if (compare != 0) {
105 return compare;
106 }
107 compare = _dnormals.compare_to(other._dnormals, egg_parameters->_normal_threshold);
108 if (compare != 0) {
109 return compare;
110 }
111 }
112
113 if (has_color()) {
114 int compare =
115 _color.compare_to(other._color, egg_parameters->_color_threshold);
116 if (compare != 0) {
117 return compare;
118 }
119 compare = _drgbas.compare_to(other._drgbas, egg_parameters->_color_threshold);
120 if (compare != 0) {
121 return compare;
122 }
123 }
124
125 return 0;
126}
127
128/**
129 * Applies the indicated transformation matrix to the attributes.
130 */
131 void EggAttributes::
132 transform(const LMatrix4d &mat) {
133 if (has_normal()) {
134 _normal = _normal * mat;
135 LVector3d old_normal = _normal;
136 _normal.normalize();
137
138 EggMorphNormalList::iterator mi;
139 for (mi = _dnormals.begin(); mi != _dnormals.end(); ++mi) {
140 // We can safely cast the morph object to a non-const, because we're not
141 // changing its name, which is the only thing the set cares about
142 // preserving.
143 EggMorphNormal &morph = (EggMorphNormal &)(*mi);
144
145 // A bit of funny business to ensure the offset normal is normalized
146 // after the transform. This will break strange normal morphs that want
147 // to change the length of the normal, but what else can we do?
148 LVector3d offset = (*mi).get_offset() * mat;
149 LVector3d n = old_normal + offset;
150 n.normalize();
151 morph.set_offset(n - _normal);
152 }
153 }
154}
EggAttributes
The set of attributes that may be applied to vertices as well as polygons, such as surface normal and...
Definition eggAttributes.h:33
EggAttributes::transform
void transform(const LMatrix4d &mat)
Applies the indicated transformation matrix to the attributes.
Definition eggAttributes.cxx:132
EggAttributes::compare_to
int compare_to(const EggAttributes &other) const
An ordering operator to compare two vertices for sorting order.
Definition eggAttributes.cxx:96
EggAttributes::get_color
LColor get_color() const
Returns the color set on this particular attribute.
Definition eggAttributes.I:91
EggAttributes::write
void write(std::ostream &out, int indent_level) const
Writes the attributes to the indicated output stream in Egg format.
Definition eggAttributes.cxx:65
TypeHandle
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
eggAttributes.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
eggMorphList.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
eggMorph.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
eggParameters.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
indent
std::ostream & indent(std::ostream &out, int indent_level)
A handy function for doing text formatting.
Definition indent.cxx:20
indent.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.