1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
<?xml version="1.0"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<refentry id="libg3d-face">
<refmeta>
<refentrytitle role="top_of_page" id="libg3d-face.top_of_page">face</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>LIBG3D Library</refmiscinfo>
</refmeta>
<refnamediv>
<refname>face</refname>
<refpurpose>Face manipulation</refpurpose>
<!--[<xref linkend="desc" endterm="desc.title"/>]-->
</refnamediv>
<refsynopsisdiv id="libg3d-face.synopsis" role="synopsis">
<title role="synopsis.title">Synopsis</title>
<synopsis>
#include <g3d/face.h>
#define <link linkend="G3D-FLAG-MAT-TWOSIDE:CAPS">G3D_FLAG_MAT_TWOSIDE</link>
#define <link linkend="G3D-FLAG-FAC-NORMALS:CAPS">G3D_FLAG_FAC_NORMALS</link>
#define <link linkend="G3D-FLAG-FAC-TEXMAP:CAPS">G3D_FLAG_FAC_TEXMAP</link>
<link linkend="G3DFace">G3DFace</link>;
<link linkend="gboolean">gboolean</link> <link linkend="g3d-face-get-normal">g3d_face_get_normal</link> (<link linkend="G3DFace">G3DFace</link> *face,
<link linkend="G3DObject">G3DObject</link> *object,
<link linkend="G3DFloat">G3DFloat</link> *nx,
<link linkend="G3DFloat">G3DFloat</link> *ny,
<link linkend="G3DFloat">G3DFloat</link> *nz);
<link linkend="void">void</link> <link linkend="g3d-face-free">g3d_face_free</link> (<link linkend="G3DFace">G3DFace</link> *face);
</synopsis>
</refsynopsisdiv>
<refsect1 id="libg3d-face.description" role="desc">
<title role="desc.title">Description</title>
<para>
A face is plane bordered by at least 3 vertices.</para>
<para>
</para>
</refsect1>
<refsect1 id="libg3d-face.details" role="details">
<title role="details.title">Details</title>
<refsect2 id="G3D-FLAG-MAT-TWOSIDE:CAPS" role="macro">
<title>G3D_FLAG_MAT_TWOSIDE</title>
<indexterm zone="G3D-FLAG-MAT-TWOSIDE:CAPS"><primary>G3D_FLAG_MAT_TWOSIDE</primary></indexterm><programlisting>#define G3D_FLAG_MAT_TWOSIDE (1L << 0)
</programlisting>
<para>
Faces using this material should be rendered two-sided as the direction
is unknown.</para>
<para>
</para></refsect2>
<refsect2 id="G3D-FLAG-FAC-NORMALS:CAPS" role="macro">
<title>G3D_FLAG_FAC_NORMALS</title>
<indexterm zone="G3D-FLAG-FAC-NORMALS:CAPS"><primary>G3D_FLAG_FAC_NORMALS</primary></indexterm><programlisting>#define G3D_FLAG_FAC_NORMALS (1L << 0)
</programlisting>
<para>
The face has custom normals.</para>
<para>
</para></refsect2>
<refsect2 id="G3D-FLAG-FAC-TEXMAP:CAPS" role="macro">
<title>G3D_FLAG_FAC_TEXMAP</title>
<indexterm zone="G3D-FLAG-FAC-TEXMAP:CAPS"><primary>G3D_FLAG_FAC_TEXMAP</primary></indexterm><programlisting>#define G3D_FLAG_FAC_TEXMAP (1L << 1)
</programlisting>
<para>
The face has a texture map and texture coordinates.</para>
<para>
</para></refsect2>
<refsect2 id="G3DFace" role="struct">
<title>G3DFace</title>
<indexterm zone="G3DFace"><primary>G3DFace</primary></indexterm><programlisting>typedef struct {
guint32 vertex_count;
guint32 *vertex_indices;
G3DMaterial *material;
guint32 flags;
G3DVector *normals;
G3DImage *tex_image;
guint32 tex_vertex_count;
G3DVector *tex_vertex_data;
} G3DFace;
</programlisting>
<para>
An object representing a surface.</para>
<para>
</para><variablelist role="struct">
<varlistentry>
<term><link linkend="guint32">guint32</link> <structfield>vertex_count</structfield>;</term>
<listitem><simpara> number of vertices
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="guint32">guint32</link> *<structfield>vertex_indices</structfield>;</term>
<listitem><simpara> indices of vertices in <link linkend="G3DObject"><type>G3DObject</type></link>
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="G3DMaterial">G3DMaterial</link> *<structfield>material</structfield>;</term>
<listitem><simpara> material to use for surface
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="guint32">guint32</link> <structfield>flags</structfield>;</term>
<listitem><simpara> flags
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="G3DVector">G3DVector</link> *<structfield>normals</structfield>;</term>
<listitem><simpara> optional normal array (one vector - 3 <link linkend="G3DVector"><type>G3DVector</type></link> values - for each
vertex)
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="G3DImage">G3DImage</link> *<structfield>tex_image</structfield>;</term>
<listitem><simpara> optional texture image
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="guint32">guint32</link> <structfield>tex_vertex_count</structfield>;</term>
<listitem><simpara> number of texture vertices, should be 0 or match
vertex_count
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="G3DVector">G3DVector</link> *<structfield>tex_vertex_data</structfield>;</term>
<listitem><simpara> array of texture vertices
</simpara></listitem>
</varlistentry>
</variablelist></refsect2>
<refsect2 id="g3d-face-get-normal" role="function">
<title>g3d_face_get_normal ()</title>
<indexterm zone="g3d-face-get-normal"><primary>g3d_face_get_normal</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link> g3d_face_get_normal (<link linkend="G3DFace">G3DFace</link> *face,
<link linkend="G3DObject">G3DObject</link> *object,
<link linkend="G3DFloat">G3DFloat</link> *nx,
<link linkend="G3DFloat">G3DFloat</link> *ny,
<link linkend="G3DFloat">G3DFloat</link> *nz);</programlisting>
<para>
calculates the normal of a face.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>face</parameter> :</term>
<listitem><simpara> face to calculate normal of
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>object</parameter> :</term>
<listitem><simpara> object containing vertices of face
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>nx</parameter> :</term>
<listitem><simpara> x component of resulting normal
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>ny</parameter> :</term>
<listitem><simpara> y component of resulting normal
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>nz</parameter> :</term>
<listitem><simpara> z component of resulting normal
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis> :</term><listitem><simpara> TRUE on success, FALSE else
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2 id="g3d-face-free" role="function">
<title>g3d_face_free ()</title>
<indexterm zone="g3d-face-free"><primary>g3d_face_free</primary></indexterm><programlisting><link linkend="void">void</link> g3d_face_free (<link linkend="G3DFace">G3DFace</link> *face);</programlisting>
<para>
Frees all memory allocated for this face.</para>
<para>
</para><variablelist role="params">
<varlistentry><term><parameter>face</parameter> :</term>
<listitem><simpara> the face to free
</simpara></listitem></varlistentry>
</variablelist></refsect2>
</refsect1>
</refentry>
|
