GLVERTEXPOINTER(3G) GLVERTEXPOINTER(3G)
NAME
glVertexPointer - define an array of vertex data
C SPECIFICATION
void glVertexPointer( GLint size,
GLenum type,
GLsizei stride,
const GLvoid *pointer )
PARAMETERS
size Specifies 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, and 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.
pointer Specifies a pointer to the first coordinate of the first vertex in the array. The initial
value is 0.
DESCRIPTION
glVertexPointer specifies the location and data of an array of vertex coordinates to use when ren-dering. rendering.
dering. size specifies the number of coordinates per vertex and type the data type of the coordi-nates. coordinates.
nates. 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.) When a vertex array is specified, size,
type, stride, and pointer are saved as client-side state.
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
glDrawArrays, glDrawElements, or glArrayElement is called.
Use glDrawArrays to construct a sequence of primitives (all of the same type) from prespecified ver-tex vertex
tex 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.
NOTES
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 or
glDrawArrays 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.
ERRORS
GL_INVALID_VALUE is generated if size is not 2, 3, or 4.
GL_INVALID_ENUM is generated if type is is not an accepted value.
GL_INVALID_VALUE is generated if stride is negative.
ASSOCIATED GETS
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
glGetPointerv with argument GL_VERTEX_ARRAY_POINTER
SEE ALSO
glArrayElement(3G), glColorPointer(3G), glDrawArrays(3G), glDrawElements(3G), glDrawRangeElements(3G), glEdgeFlagPointer(3G),
glEnable(3G), glGetPointerv(3G), glIndexPointer(3G), glInterleavedArrays(3G), glNormalPointer(3G), glPopClientAttrib(3G),
glPushClientAttrib(3G), glTexCoordPointer(3G)
GLVERTEXPOINTER(3G)
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