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  man pages->Tru64 Unix man pages -> glVertexPointer (3)              



NAME    [Toc]    [Back]

       glVertexPointer - define an array of vertex data

SYNOPSIS    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

       Specifies the number of coordinates per vertex; must be 2,
       3, or 4. The initial value is 4.  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.  Specifies the byte offset
       between consecutive vertexes. If stride is 0, the vertexes
       are understood to be tightly packed in the array. The initial
 value is 0.  Specifies a pointer to the first coordinate
  of  the first vertex in the array. The initial value
       is 0.

DESCRIPTION    [Toc]    [Back]

       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  vertexes
       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

       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  vertexes  and  vertex  attributes   and
       glDrawElements()  to construct a sequence of primitives by
       indexing vertexes and vertex attributes.

NOTES    [Toc]    [Back]

       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

       Vertex  array  parameters  are  client-side  state and are
       therefore not saved  or  restored  by  glPushAttrib()  and
       glPopAttrib(). Use glPushClientAttrib() and glPopClientAttrib()

ERRORS    [Toc]    [Back]

       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

       GL_INVALID_VALUE is generated if stride is negative.

ASSOCIATED GETS    [Toc]    [Back]

       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    [Toc]    [Back]

       glArrayElement(3),   glColorPointer(3),   glDrawArrays(3),
       glDrawElements(3),   glDrawRangeElements(3),   glEdgeFlagPointer(3),    glEnable(3),   glGetPointerv(3),   glIndexPointer(3),  glInterleavedArrays(3),   glNormalPointer(3),
       glPopClientAttrib(3),  glPushClientAttrib(3),  glTexCoordPointer(3)

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