GLNORMALPOINTER(3G) UNIX Programmer's Manual GLNORMALPOINTER(3G)
glNormalPointer - define an array of normals
void glNormalPointer( GLenum type,
GLsizei stride,
const GLvoid *ptr )
type Specifies the data type of each coordinate in the
array. Symbolic constants GL_BYTE, GL_SHORT, GL_INT,
GL_FLOAT, and GL_DOUBLE are accepted. The initial
value is GL_FLOAT.
stride Specifies the byte offset between consecutive nor-
mals. If stride is 0- the initial value-the normals
are understood to be tightly packed in the array.
The initial value is 0.
ptr Specifies a pointer to the first coordinate of the
first normal in the array. The initial value is 0.
glNormalPointer specifies the location and data of an array
of normals to use when rendering. type specifies the data
type of the normal coordinates and stride gives the byte
stride from one normal to the next, allowing vertices and
attributes to be packed into a single array or stored in
separate arrays. (Single-array storage may be more efficient
on some implementations; see glInterleavedArrays.) When a
normal array is specified, type, stride, and ptr are saved
as client-side state.
To enable and disable the normal array, call
glEnableClientState and glDisableClientState with the argu-
ment GL_NORMAL_ARRAY. If enabled, the normal array is used
when glDrawArrays, glDrawElements, or glArrayElement is
called.
Use glDrawArrays to construct a sequence of primitives (all
of the same type) from prespecified vertex and vertex attri-
bute arrays. Use glArrayElement to specify primitives by
indexing vertices and vertex attributes and glDrawElements
to construct a sequence of primitives by indexing vertices
and vertex attributes.
glNormalPointer is available only if the GL version is 1.1
or greater.
MirOS BSD #10-current Printed 20.2.2012 1
GLNORMALPOINTER(3G) UNIX Programmer's Manual GLNORMALPOINTER(3G)
The normal array is initially disabled and isn't accessed
when glArrayElement, glDrawElements, or glDrawArrays is
called.
Execution of glNormalPointer is not allowed between glBegin
and the corresponding glEnd, but an error may or may not be
generated. If an error is not generated, the operation is
undefined.
glNormalPointer is typically implemented on the client side.
Since the normal array parameters are client-side state,
they are not saved or restored by glPushAttrib and
glPopAttrib. Use glPushClientAttrib and glPopClientAttrib
instead.
GL_INVALID_ENUM is generated if type is not an accepted
value.
GL_INVALID_VALUE is generated if stride is negative.
glIsEnabled with argument GL_NORMAL_ARRAY
glGet with argument GL_NORMAL_ARRAY_TYPE
glGet with argument GL_NORMAL_ARRAY_STRIDE
glGetPointerv with argument GL_NORMAL_ARRAY_POINTER
glArrayElement(3G), glColorPointer(3G), glDrawArrays(3G),
glDrawElements(3G), glEdgeFlagPointer(3G), glEnable(3G),
glGetPointerv(3G), glIndexPointer(3G),
glInterleavedArrays(3G), glPopClientAttrib(3G),
glPushClientAttrib(3G), glTexCoordPointer(3G),
glVertexPointer(3G)
MirOS BSD #10-current Printed 20.2.2012 2
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