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glVertexPointer — define an array of vertex data
void glVertexPointer( | GLint | size, |
| GLenum | type, | |
| GLsizei | stride, | |
| const GLvoid * | pointer); |
sizeSpecifies the number of coordinates per vertex. Must be 2, 3, or 4. The initial value is 4.
type
Specifies the data type of each coordinate in the array.
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
vertices. If stride is 0, the vertices are understood to be tightly packed in
the array. The initial value
is 0.
pointerSpecifies a pointer to the first coordinate of the first vertex in the array. The initial value is 0.
glVertexPointer specifies the location and data format of an array of vertex coordinates
to use when rendering.
size specifies the number of coordinates per vertex, and must be 2, 3, or 4.
type specifies the data type of each coordinate, and stride specifies the byte stride from one
vertex 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 vertex 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 vertex array
client-side state (GL_VERTEX_ARRAY_BUFFER_BINDING).
When a vertex 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 the vertex array, call glEnableClientState and
glDisableClientState with the argument GL_VERTEX_ARRAY. If
enabled, the vertex array is used when
glArrayElement, glDrawArrays, glMultiDrawArrays,
glDrawElements, glMultiDrawElements, or glDrawRangeElements
is called.
glVertexPointer is available only if the GL version is 1.1 or greater.
The vertex array is initially disabled and isn't accessed when glArrayElement, glDrawElements, glDrawRangeElements, glDrawArrays, glMultiDrawArrays, or glMultiDrawElements is called.
Execution of glVertexPointer 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.
glVertexPointer is typically implemented on the client side.
Vertex 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 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_VERTEX_ARRAY
glGet with argument GL_VERTEX_ARRAY_SIZE
glGet with argument GL_VERTEX_ARRAY_TYPE
glGet with argument GL_VERTEX_ARRAY_STRIDE
glGet with argument GL_VERTEX_ARRAY_BUFFER_BINDING
glGet with argument GL_ARRAY_BUFFER_BINDING
glGetPointerv with argument GL_VERTEX_ARRAY_POINTER
glArrayElement, glBindBuffer, glColorPointer, glDisableClientState, glDrawArrays, glDrawElements, glDrawRangeElements, glEdgeFlagPointer, glEnableClientState, glFogCoordPointer, glIndexPointer, glInterleavedArrays, glMultiDrawArrays, glMultiDrawElements, glNormalPointer, glPopClientAttrib, glPushClientAttrib, glSecondaryColorPointer, glTexCoordPointer, glVertex, glVertexAttribPointer
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/.