GLTEXCOORDPOINTER(3G)GLTEXCOORDPOINTER(3G)NAMEglTexCoordPointer - define an array of texture coordinates
C SPECIFICATION
void glTexCoordPointer( GLint size,
GLenum type,
GLsizei stride,
const GLvoid *ptr )
delim $$
PARAMETERS
size Specifies the number of coordinates per array element. Must be
1, 2, 3 or 4. The initial value is 4.
type Specifies the data type of each texture coordinate. Symbolic
constants GL_SHORT, GL_INT, GL_FLOAT, or GL_DOUBLE are accepted.
The initial value is GL_FLOAT.
stride Specifies the byte offset between consecutive array elements.
If stride is 0, the array elements are understood to be tightly
packed. The initial value is 0.
ptr Specifies a pointer to the first coordinate of the first element
in the array. The initial value is 0.
DESCRIPTIONglTexCoordPointer specifies the location and data of an array of
texture coordinates to use when rendering. size specifies the number
of coordinates per element, and must be 1, 2, 3, or 4. type specifies
the data type of each texture coordinate and stride specifies the byte
stride from one array element 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 texture coordinate array is specified,
size, type, stride, and ptr are saved client-side state.
To enable and disable the texture coordinate array, call
glEnableClientState and glDisableClientState with the argument
GL_TEXTURE_COORD_ARRAY. If enabled, the texture coordinate array is
used when glDrawArrays, glDrawElements, glDrawRangeElements or
glArrayElement is called.
Use glDrawArrays to construct a sequence of primitives (all of the same
type) from prespecified vertex and vertex attribute 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.
NOTESglTexCoordPointer is available only if the GL version is 1.1 or
greater.
The texture coordinate array is initially disabled and it won't be
accessed when glArrayElement, glDrawElements, glDrawRangeElements, or
glDrawArrays is called.
Execution of glTexCoordPointer is not allowed between the execution of
glBegin and the corresponding execution of glEnd, but an error may or
may not be generated. If no error is generated, the operation is
undefined.
glTexCoordPointer is typically implemented on the client side with no
protocol.
The texture coordinate array parameters are client-side state and are
therefore not saved or restored by glPushAttrib and glPopAttrib. Use
glPushClientAttrib and glPopClientAttrib instead.
When the GL_ARB_imaging extension is supported, glTexCoordPointer
updates the texture coordinate array state of the active client texture
unit, specified with glClientActiveTextureARB.
ERRORS
GL_INVALID_VALUE is generated if size is not 1, 2, 3, or 4.
GL_INVALID_ENUM is generated if type is not an accepted value.
GL_INVALID_VALUE is generated if stride is negative.
ASSOCIATED GETS
glIsEnabled with argument GL_TEXTURE_COORD_ARRAY
glGet with argument GL_TEXTURE_COORD_ARRAY_SIZE
glGet with argument GL_TEXTURE_COORD_ARRAY_TYPE
glGetPointerv with argument GL_TEXTURE_COORD_ARRAY_POINTER
SEE ALSOglArrayElement(3G), glClientActiveTextureARB(3G), glColorPointer(3G),
glDrawArrays(3G), glDrawElements(3G), glDrawRangeElements(3G),
glEdgeFlagPointer(3G), glEnable(3G), glGetPointerv(3G),
glIndexPointer(3G), glNormalPointer(3G), glPopClientAttrib(3G),
glPushClientAttrib(3G), glTexCoord(3G), glVertexPointer(3G)
March 1, 2011
