GLVERTEXPOINTER - Online Linux Manual PageSection : 3G
NAME"glVertexPointer − define an array of vertex data
C SPECIFICATIONvoid glVertexPointer( GLint size, GLenum type, GLsizei stride, const GLvoid *ptr )
PARAMETERSsize  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. ptr  Specifies a pointer to the first coordinate of the first vertex in the array. The initial value is 0.
DESCRIPTION­glVertexPointer specifies the location and data of an array of vertex coordinates to use when rendering. size specifies the number of coordinates per vertex and type the data type of the coordinates. 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 ptr 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 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.
NOTES­glVertexPointer 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.
ERRORS­GL_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 GETS­glIsEnabled 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 ALSO­glArrayElement(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) 0
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