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eggVertexUV.I
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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 eggVertexUV.I
10 * @author drose
11 * @date 2004-07-20
12 */
13
14/**
15 * Returns the actual name that should be set for a given name string.
16 * Usually this is the same string that is input, but for historical reasons
17 * the texture coordinate name "default" is mapped to the empty string.
18 */
19INLINE std::string EggVertexUV::
20 filter_name(const std::string &name) {
21 if (name == "default") {
22 return std::string();
23 }
24 return name;
25}
26
27/**
28 *
29 */
30INLINE void EggVertexUV::
31set_name(const std::string &name) {
32 Namable::set_name(filter_name(name));
33}
34
35/**
36 * Returns the number of components of the texture coordinate set. This is
37 * either 2 (the normal case) or 3 (for a 3-d texture coordinate).
38 */
39INLINE int EggVertexUV::
40 get_num_dimensions() const {
41 return has_w() ? 3 : 2;
42}
43
44/**
45 * Returns true if the texture coordinate has a third, w component, false if
46 * it is just a normal 2-d texture coordinate.
47 */
48INLINE bool EggVertexUV::
49 has_w() const {
50 return (_flags & F_has_w) != 0;
51}
52
53/**
54 * Returns the texture coordinate pair, if get_num_dimensions() is 2.
55 */
56INLINE LTexCoordd EggVertexUV::
57 get_uv() const {
58 nassertr(!has_w(), LTexCoordd::zero());
59 return LTexCoordd(_uvw[0], _uvw[1]);
60}
61
62/**
63 * Returns the texture coordinate triple, if get_num_dimensions() is 3. This
64 * is also legal to call if get_num_dimensions() is 2 (but the last dimension
65 * will be zero).
66 */
67INLINE const LTexCoord3d &EggVertexUV::
68 get_uvw() const {
69 return _uvw;
70}
71
72/**
73 * Sets the texture coordinate pair. This makes the texture coordinate a 2-d
74 * texture coordinate, which is the usual case.
75 */
76INLINE void EggVertexUV::
77 set_uv(const LTexCoordd &uv) {
78 _uvw.set(uv[0], uv[1], 0.0);
79 _flags &= ~F_has_w;
80}
81
82/**
83 * Sets the texture coordinate triple. This makes the texture coordinate a
84 * 3-d texture coordinate.
85 */
86INLINE void EggVertexUV::
87 set_uvw(const LTexCoord3d &uvw) {
88 _uvw = uvw;
89 _flags |= F_has_w;
90}
91
92/**
93 *
94 */
95INLINE bool EggVertexUV::
96has_tangent() const {
97 return (_flags & F_has_tangent) != 0;
98}
99
100/**
101 *
102 */
103INLINE bool EggVertexUV::
104has_tangent4() const {
105 return (_flags & F_has_tangent4) != 0;
106}
107
108/**
109 *
110 */
111INLINE const LNormald &EggVertexUV::
112get_tangent() const {
113 nassertr(has_tangent(), _tangent);
114 return _tangent;
115}
116
117/**
118 *
119 */
120INLINE LVecBase4d EggVertexUV::
121get_tangent4() const {
122 LVecBase4d tangent4(_tangent, 1.0);
123 nassertr_always(has_tangent(), tangent4);
124 if (_flags & F_flip_computed_binormal) {
125 tangent4[3] = -1.0;
126 }
127 return tangent4;
128}
129
130/**
131 *
132 */
133INLINE void EggVertexUV::
134set_tangent(const LNormald &tangent) {
135 _tangent = tangent;
136 _flags |= F_has_tangent;
137 _flags &= ~(F_has_tangent4 | F_flip_computed_binormal);
138}
139
140/**
141 * Sets the tangent vector, along with a fourth parameter that is multiplied
142 * with the result of cross(normal, tangent) when computing the binormal.
143 */
144INLINE void EggVertexUV::
145 set_tangent4(const LVecBase4d &tangent) {
146 _tangent = tangent.get_xyz();
147 _flags |= F_has_tangent4 | F_has_tangent;
148 if (tangent[3] < 0.0) {
149 _flags |= F_flip_computed_binormal;
150 } else {
151 _flags &= ~F_flip_computed_binormal;
152 }
153}
154
155/**
156 *
157 */
158INLINE void EggVertexUV::
159clear_tangent() {
160 _flags &= ~F_has_tangent;
161}
162
163/**
164 *
165 */
166INLINE bool EggVertexUV::
167has_binormal() const {
168 return (_flags & F_has_binormal) != 0;
169}
170
171/**
172 *
173 */
174INLINE const LNormald &EggVertexUV::
175get_binormal() const {
176 nassertr(has_binormal(), _binormal);
177 return _binormal;
178}
179
180/**
181 *
182 */
183INLINE void EggVertexUV::
184set_binormal(const LNormald &binormal) {
185 _binormal = binormal;
186 _flags |= F_has_binormal;
187}
188
189/**
190 *
191 */
192INLINE void EggVertexUV::
193clear_binormal() {
194 _flags &= ~F_has_binormal;
195}
EggVertexUV::filter_name
static std::string filter_name(const std::string &name)
Returns the actual name that should be set for a given name string.
Definition eggVertexUV.I:20
EggVertexUV::get_uv
LTexCoordd get_uv() const
Returns the texture coordinate pair, if get_num_dimensions() is 2.
Definition eggVertexUV.I:57
EggVertexUV::has_w
bool has_w() const
Returns true if the texture coordinate has a third, w component, false if it is just a normal 2-d tex...
Definition eggVertexUV.I:49
EggVertexUV::set_uv
void set_uv(const LTexCoordd &texCoord)
Sets the texture coordinate pair.
Definition eggVertexUV.I:77
EggVertexUV::get_num_dimensions
int get_num_dimensions() const
Returns the number of components of the texture coordinate set.
Definition eggVertexUV.I:40
EggVertexUV::set_uvw
void set_uvw(const LTexCoord3d &texCoord)
Sets the texture coordinate triple.
Definition eggVertexUV.I:87
EggVertexUV::set_tangent4
void set_tangent4(const LVecBase4d &tangent)
Sets the tangent vector, along with a fourth parameter that is multiplied with the result of cross(no...
Definition eggVertexUV.I:145
EggVertexUV::get_uvw
const LTexCoord3d & get_uvw() const
Returns the texture coordinate triple, if get_num_dimensions() is 3.
Definition eggVertexUV.I:68