MirOS Manual: glVertexPointer(3)


GLVERTEXPOINTER(3G) UNIX Programmer's Manual  GLVERTEXPOINTER(3G)

NAME

     glVertexPointer - define an array of vertex data

C SPECIFICATION

     void glVertexPointer( GLint size,
                           GLenum type,
                           GLsizei stride,
                           const GLvoid *ptr )

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 ver-
             tices. 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.

DESCRIPTION

     glVertexPointer 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 imple-
     mentations; 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 attri-
     bute 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.

MirOS BSD #10-current  Printed 03.04.2017                       1

GLVERTEXPOINTER(3G) UNIX Programmer's Manual  GLVERTEXPOINTER(3G)

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 exe-
     cution 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 there-
     fore 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)

MirOS BSD #10-current  Printed 03.04.2017                       2

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