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1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> |
2 | <!-- saved from url=(0013)about:internet --> | |
3 | <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>glTexCoordPointer</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glTexCoordPointer"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glTexCoordPointer — define an array of texture coordinates</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glTexCoordPointer</b>(</code></td><td>GLint </td><td><var class="pdparam">size</var>, </td></tr><tr><td> </td><td>GLenum </td><td><var class="pdparam">type</var>, </td></tr><tr><td> </td><td>GLsizei </td><td><var class="pdparam">stride</var>, </td></tr><tr><td> </td><td>const GLvoid * </td><td><var class="pdparam">pointer</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p> | |
4 | Specifies the number of coordinates per array element. Must be 1, 2, 3, | |
5 | or 4. The initial value is 4. | |
6 | </p></dd><dt><span class="term"><em class="parameter"><code>type</code></em></span></dt><dd><p> | |
7 | Specifies the data type of each texture coordinate. | |
8 | Symbolic constants | |
9 | <code class="constant">GL_SHORT</code>, | |
10 | <code class="constant">GL_INT</code>, | |
11 | <code class="constant">GL_FLOAT</code>, | |
12 | or <code class="constant">GL_DOUBLE</code> | |
13 | are accepted. The initial value is <code class="constant">GL_FLOAT</code>. | |
14 | </p></dd><dt><span class="term"><em class="parameter"><code>stride</code></em></span></dt><dd><p> | |
15 | Specifies the byte offset between consecutive texture coordinate sets. | |
16 | If <em class="parameter"><code>stride</code></em> is 0, the array elements are understood | |
17 | to be tightly packed. The initial value is 0. | |
18 | </p></dd><dt><span class="term"><em class="parameter"><code>pointer</code></em></span></dt><dd><p> | |
19 | Specifies a pointer to the first coordinate of the first texture coordinate set in the | |
20 | array. The initial value is 0. | |
21 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
22 | <code class="function">glTexCoordPointer</code> specifies the location and data format of an array of texture | |
23 | coordinates to use when rendering. | |
24 | <em class="parameter"><code>size</code></em> specifies the number of coordinates per | |
25 | texture coordinate set, and must be 1, 2, 3, or 4. | |
26 | <em class="parameter"><code>type</code></em> specifies the data type of each texture coordinate, | |
27 | and <em class="parameter"><code>stride</code></em> specifies the byte stride from one | |
28 | texture coordinate set to the next, allowing vertices and attributes | |
29 | to be packed into a single array or stored in separate arrays. | |
30 | (Single-array storage may be more efficient on some implementations; | |
31 | see | |
32 | <a class="citerefentry" href="glInterleavedArrays.xml"><span class="citerefentry"><span class="refentrytitle">glInterleavedArrays</span></span></a>.) | |
33 | </p><p> | |
34 | If a non-zero named buffer object is bound to the <code class="constant">GL_ARRAY_BUFFER</code> target | |
35 | (see <a class="citerefentry" href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>) while a texture coordinate array is | |
36 | specified, <em class="parameter"><code>pointer</code></em> is treated as a byte offset into the buffer object's data store. | |
37 | Also, the buffer object binding (<code class="constant">GL_ARRAY_BUFFER_BINDING</code>) is saved as texture coordinate vertex array | |
38 | client-side state (<code class="constant">GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING</code>). | |
39 | </p><p> | |
40 | When a texture coordinate array is specified, | |
41 | <em class="parameter"><code>size</code></em>, <em class="parameter"><code>type</code></em>, <em class="parameter"><code>stride</code></em>, and <em class="parameter"><code>pointer</code></em> are saved as client-side | |
42 | state, in addition to the current vertex array buffer object binding. | |
43 | </p><p> | |
44 | To enable and disable a texture coordinate array, call <a class="citerefentry" href="glEnableClientState.xml"><span class="citerefentry"><span class="refentrytitle">glEnableClientState</span></span></a> and | |
45 | <a class="citerefentry" href="glDisableClientState.xml"><span class="citerefentry"><span class="refentrytitle">glDisableClientState</span></span></a> with the argument | |
46 | <code class="constant">GL_TEXTURE_COORD_ARRAY</code>. If enabled, the texture coordinate array is used when | |
47 | <a class="citerefentry" href="glArrayElement.xml"><span class="citerefentry"><span class="refentrytitle">glArrayElement</span></span></a>, <a class="citerefentry" href="glDrawArrays.xml"><span class="citerefentry"><span class="refentrytitle">glDrawArrays</span></span></a>, <a class="citerefentry" href="glMultiDrawArrays.xml"><span class="citerefentry"><span class="refentrytitle">glMultiDrawArrays</span></span></a>, | |
48 | <a class="citerefentry" href="glDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawElements</span></span></a>, <a class="citerefentry" href="glMultiDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glMultiDrawElements</span></span></a>, or <a class="citerefentry" href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a> | |
49 | is called. | |
50 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
51 | <code class="function">glTexCoordPointer</code> is available only if the GL version is 1.1 or greater. | |
52 | </p><p> | |
53 | For OpenGL versions 1.3 and greater, or when the <code class="code">ARB_multitexture</code> | |
54 | extension is supported, <code class="function">glTexCoordPointer</code> updates the | |
55 | texture coordinate array state of the active client texture unit, | |
56 | specified with <a class="citerefentry" href="glClientActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glClientActiveTexture</span></span></a>. | |
57 | </p><p> | |
58 | Each texture coordinate array is initially disabled and isn't accessed when | |
59 | <a class="citerefentry" href="glArrayElement.xml"><span class="citerefentry"><span class="refentrytitle">glArrayElement</span></span></a>, <a class="citerefentry" href="glDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawElements</span></span></a>, <a class="citerefentry" href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>, | |
60 | <a class="citerefentry" href="glDrawArrays.xml"><span class="citerefentry"><span class="refentrytitle">glDrawArrays</span></span></a>, <a class="citerefentry" href="glMultiDrawArrays.xml"><span class="citerefentry"><span class="refentrytitle">glMultiDrawArrays</span></span></a>, or <a class="citerefentry" href="glMultiDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glMultiDrawElements</span></span></a> | |
61 | is called. | |
62 | </p><p> | |
63 | Execution of <code class="function">glTexCoordPointer</code> is not allowed between the execution of | |
64 | <a class="citerefentry" href="glBegin.xml"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a> and the corresponding execution of <a class="citerefentry" href="glEnd.xml"><span class="citerefentry"><span class="refentrytitle">glEnd</span></span></a>, | |
65 | but an error may or may not be generated. If no error is generated, | |
66 | the operation is undefined. | |
67 | </p><p> | |
68 | <code class="function">glTexCoordPointer</code> is typically implemented on the client side. | |
69 | </p><p> | |
70 | Texture coordinate array parameters are client-side state and are therefore | |
71 | not saved or restored by <a class="citerefentry" href="glPushAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glPushAttrib</span></span></a> and <a class="citerefentry" href="glPopAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glPopAttrib</span></span></a>. | |
72 | Use <a class="citerefentry" href="glPushClientAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glPushClientAttrib</span></span></a> and | |
73 | <a class="citerefentry" href="glPopClientAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glPopClientAttrib</span></span></a> instead. | |
74 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
75 | <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>size</code></em> is not 1, 2, 3, or 4. | |
76 | </p><p> | |
77 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>type</code></em> is not an accepted value. | |
78 | </p><p> | |
79 | <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>stride</code></em> is negative. | |
80 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p> | |
81 | <a class="citerefentry" href="glIsEnabled.xml"><span class="citerefentry"><span class="refentrytitle">glIsEnabled</span></span></a> with argument <code class="constant">GL_TEXTURE_COORD_ARRAY</code> | |
82 | </p><p> | |
83 | <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_TEXTURE_COORD_ARRAY_SIZE</code> | |
84 | </p><p> | |
85 | <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_TEXTURE_COORD_ARRAY_TYPE</code> | |
86 | </p><p> | |
87 | <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_TEXTURE_COORD_ARRAY_STRIDE</code> | |
88 | </p><p> | |
89 | <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING</code> | |
90 | </p><p> | |
91 | <a class="citerefentry" href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_ARRAY_BUFFER_BINDING</code> | |
92 | </p><p> | |
93 | <a class="citerefentry" href="glGetPointerv.xml"><span class="citerefentry"><span class="refentrytitle">glGetPointerv</span></span></a> with argument <code class="constant">GL_TEXTURE_COORD_ARRAY_POINTER</code> | |
94 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
95 | <a class="citerefentry" href="glArrayElement.xml"><span class="citerefentry"><span class="refentrytitle">glArrayElement</span></span></a>, | |
96 | <a class="citerefentry" href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>, | |
97 | <a class="citerefentry" href="glClientActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glClientActiveTexture</span></span></a>, | |
98 | <a class="citerefentry" href="glColorPointer.xml"><span class="citerefentry"><span class="refentrytitle">glColorPointer</span></span></a>, | |
99 | <a class="citerefentry" href="glDisableClientState.xml"><span class="citerefentry"><span class="refentrytitle">glDisableClientState</span></span></a>, | |
100 | <a class="citerefentry" href="glDrawArrays.xml"><span class="citerefentry"><span class="refentrytitle">glDrawArrays</span></span></a>, | |
101 | <a class="citerefentry" href="glDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawElements</span></span></a>, | |
102 | <a class="citerefentry" href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>, | |
103 | <a class="citerefentry" href="glEdgeFlagPointer.xml"><span class="citerefentry"><span class="refentrytitle">glEdgeFlagPointer</span></span></a>, | |
104 | <a class="citerefentry" href="glEnableClientState.xml"><span class="citerefentry"><span class="refentrytitle">glEnableClientState</span></span></a>, | |
105 | <a class="citerefentry" href="glFogCoordPointer.xml"><span class="citerefentry"><span class="refentrytitle">glFogCoordPointer</span></span></a>, | |
106 | <a class="citerefentry" href="glIndexPointer.xml"><span class="citerefentry"><span class="refentrytitle">glIndexPointer</span></span></a>, | |
107 | <a class="citerefentry" href="glInterleavedArrays.xml"><span class="citerefentry"><span class="refentrytitle">glInterleavedArrays</span></span></a>, | |
108 | <a class="citerefentry" href="glMultiDrawArrays.xml"><span class="citerefentry"><span class="refentrytitle">glMultiDrawArrays</span></span></a>, | |
109 | <a class="citerefentry" href="glMultiDrawElements.xml"><span class="citerefentry"><span class="refentrytitle">glMultiDrawElements</span></span></a>, | |
110 | <a class="citerefentry" href="glMultiTexCoord.xml"><span class="citerefentry"><span class="refentrytitle">glMultiTexCoord</span></span></a>, | |
111 | <a class="citerefentry" href="glNormalPointer.xml"><span class="citerefentry"><span class="refentrytitle">glNormalPointer</span></span></a>, | |
112 | <a class="citerefentry" href="glPopClientAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glPopClientAttrib</span></span></a>, | |
113 | <a class="citerefentry" href="glPushClientAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glPushClientAttrib</span></span></a>, | |
114 | <a class="citerefentry" href="glSecondaryColorPointer.xml"><span class="citerefentry"><span class="refentrytitle">glSecondaryColorPointer</span></span></a>, | |
115 | <a class="citerefentry" href="glTexCoord.xml"><span class="citerefentry"><span class="refentrytitle">glTexCoord</span></span></a>, | |
116 | <a class="citerefentry" href="glVertexAttribPointer.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttribPointer</span></span></a>, | |
117 | <a class="citerefentry" href="glVertexPointer.xml"><span class="citerefentry"><span class="refentrytitle">glVertexPointer</span></span></a> | |
118 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
119 | Copyright <span class="trademark"></span>© 1991-2006 | |
120 | Silicon Graphics, Inc. This document is licensed under the SGI | |
121 | Free Software B License. For details, see | |
122 | <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
123 | </p></div></div></body></html> |