1GLNORMALPOINTER(3G)              OpenGL Manual             GLNORMALPOINTER(3G)
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NAME

6       glNormalPointer - define an array of normals
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C SPECIFICATION

9       void glNormalPointer(GLenum type, GLsizei stride,
10                            const GLvoid * pointer);
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PARAMETERS

13       type
14           Specifies the data type of each coordinate in the array. Symbolic
15           constants GL_BYTE, GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE are
16           accepted. The initial value is GL_FLOAT.
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18       stride
19           Specifies the byte offset between consecutive normals. If stride is
20           0, the normals are understood to be tightly packed in the array.
21           The initial value is 0.
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23       pointer
24           Specifies a pointer to the first coordinate of the first normal in
25           the array. The initial value is 0.
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DESCRIPTION

28       glNormalPointer specifies the location and data format of an array of
29       normals to use when rendering.  type specifies the data type of each
30       normal coordinate, and stride specifies the byte stride from one normal
31       to the next, allowing vertices and attributes to be packed into a
32       single array or stored in separate arrays. (Single-array storage may be
33       more efficient on some implementations; see glInterleavedArrays().)
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35       If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER
36       target (see glBindBuffer()) while a normal array is specified, pointer
37       is treated as a byte offset into the buffer object's data store. Also,
38       the buffer object binding (GL_ARRAY_BUFFER_BINDING) is saved as normal
39       vertex array client-side state (GL_NORMAL_ARRAY_BUFFER_BINDING).
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41       When a normal array is specified, type, stride, and pointer are saved
42       as client-side state, in addition to the current vertex array buffer
43       object binding.
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45       To enable and disable the normal array, call glEnableClientState() and
46       glDisableClientState() with the argument GL_NORMAL_ARRAY. If enabled,
47       the normal array is used when glDrawArrays(), glMultiDrawArrays(),
48       glDrawElements(), glMultiDrawElements(), glDrawRangeElements(), or
49       glArrayElement() is called.
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NOTES

52       glNormalPointer is available only if the GL version is 1.1 or greater.
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54       The normal array is initially disabled and isn't accessed when
55       glArrayElement(), glDrawElements(), glDrawRangeElements(),
56       glDrawArrays(), glMultiDrawArrays(), or glMultiDrawElements() is
57       called.
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59       Execution of glNormalPointer is not allowed between glBegin() and the
60       corresponding glEnd(), but an error may or may not be generated. If an
61       error is not generated, the operation is undefined.
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63       glNormalPointer is typically implemented on the client side.
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65       Normal array parameters are client-side state and are therefore not
66       saved or restored by glPushAttrib() and glPopAttrib(). Use
67       glPushClientAttrib() and glPopClientAttrib() instead.
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ERRORS

70       GL_INVALID_ENUM is generated if type is not an accepted value.
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72       GL_INVALID_VALUE is generated if stride is negative.
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ASSOCIATED GETS

75       glIsEnabled() with argument GL_NORMAL_ARRAY
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77       glGet() with argument GL_NORMAL_ARRAY_TYPE
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79       glGet() with argument GL_NORMAL_ARRAY_STRIDE
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81       glGet() with argument GL_NORMAL_ARRAY_BUFFER_BINDING
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83       glGet() with argument GL_ARRAY_BUFFER_BINDING
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85       glGetPointerv() with argument GL_NORMAL_ARRAY_POINTER
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SEE ALSO

88       glArrayElement(), glBindBuffer(), glColorPointer(),
89       glDisableClientState(), glDrawArrays(), glDrawElements(),
90       glDrawRangeElements(), glEdgeFlagPointer(), glEnableClientState(),
91       glFogCoordPointer(), glIndexPointer(), glInterleavedArrays(),
92       glMultiDrawArrays(), glMultiDrawElements(), glNormal(),
93       glPopClientAttrib(), glPushClientAttrib(), glSecondaryColorPointer(),
94       glTexCoordPointer(), glVertexAttribPointer(), glVertexPointer()
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97       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
98       under the SGI Free Software B License. For details, see
99       http://oss.sgi.com/projects/FreeB/.
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AUTHORS

102       opengl.org
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106opengl.org                        07/13/2018               GLNORMALPOINTER(3G)
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