Table of Contents
glTexCoordPointer - define an array of texture coordinates
void
glTexCoordPointer( GLint size,
GLenum type,
GLsizei stride,
const GLvoid *ptr )
eqn not supported
- 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.
glTexCoordPointer
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.
glTexCoordPointer 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.
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.
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
glArrayElement(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)
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