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glTexCoordPointer — define an array of texture coordinates
void glTexCoordPointer( | GLint | size, |
| GLenum | type, | |
| GLsizei | stride, | |
| const GLvoid * | pointer); |
sizeSpecifies 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 texture coordinate sets.
If stride is 0, the array elements are understood
to be tightly packed. The initial value is 0.
pointerSpecifies a pointer to the first coordinate of the first texture coordinate set in the array. The initial value is 0.
glTexCoordPointer specifies the location and data format of an array of texture
coordinates to use when rendering.
size specifies the number of coordinates per
texture coordinate set, 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
texture coordinate set 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.)
If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER target
(see glBindBuffer) while a texture coordinate array is
specified, pointer is treated as a byte offset into the buffer object's data store.
Also, the buffer object binding (GL_ARRAY_BUFFER_BINDING) is saved as texture coordinate vertex array
client-side state (GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING).
When a texture coordinate array is specified,
size, type, stride, and pointer are saved as client-side
state, in addition to the current vertex array buffer object binding.
To enable and disable a texture coordinate array, call glEnableClientState and
glDisableClientState with the argument
GL_TEXTURE_COORD_ARRAY. If enabled, the texture coordinate array is used when
glArrayElement, glDrawArrays, glMultiDrawArrays,
glDrawElements, glMultiDrawElements, or glDrawRangeElements
is called.
glTexCoordPointer is available only if the GL version is 1.1 or greater.
For OpenGL versions 1.3 and greater, or when the ARB_multitexture
extension is supported, glTexCoordPointer updates the
texture coordinate array state of the active client texture unit,
specified with glClientActiveTexture.
Each texture coordinate array is initially disabled and isn't accessed when glArrayElement, glDrawElements, glDrawRangeElements, glDrawArrays, glMultiDrawArrays, or glMultiDrawElements 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.
Texture coordinate array parameters are client-side state and are therefore not saved or restored by glPushAttrib and glPopAttrib. Use glPushClientAttrib and glPopClientAttrib instead.
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
glGet with argument GL_TEXTURE_COORD_ARRAY_STRIDE
glGet with argument GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING
glGet with argument GL_ARRAY_BUFFER_BINDING
glGetPointerv with argument GL_TEXTURE_COORD_ARRAY_POINTER
glArrayElement, glBindBuffer, glClientActiveTexture, glColorPointer, glDisableClientState, glDrawArrays, glDrawElements, glDrawRangeElements, glEdgeFlagPointer, glEnableClientState, glFogCoordPointer, glIndexPointer, glInterleavedArrays, glMultiDrawArrays, glMultiDrawElements, glMultiTexCoord, glNormalPointer, glPopClientAttrib, glPushClientAttrib, glSecondaryColorPointer, glTexCoord, glVertexAttribPointer, glVertexPointer
Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.