glVertexPointer

The glVertexPointer function defines an array of vertex data.

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

Parameters

size
The number of coordinates per vertex. The value of size must be 2, 3, or 4.
type
The data type of each coordinate in the array using the following symbolic constants: GL_SHORT, GL_INT, GL_FLOAT, and GL_DOUBLE.
stride
The byte offset between consecutive vertices. When stride is zero, the vertices are tightly packed in the array.
pointer
A pointer to the first coordinate of the first vertex in the array.

Remarks

The glVertexPointer function specifies the location and data of an array of vertex coordinates to use when rendering. The size parameter specifies the number of coordinates per vertex. The type parameter specifies the data type of each vertex coordinate. The stride parameter determines the byte offset from one vertex to the next, enabling the packing of vertices and attributes in a single array or storage in separate arrays. In some implementations, storing the vertices and attributes in a single array can be more efficient than using separate arrays (see glInterleavedArrays).

A vertex array is enabled when you specify the GL_VERTEX_ARRAY constant with glEnableClientState. When enabled, glDrawArrays, glDrawElements, and glArrayElement use the vertex array. By default, the vertex array is disabled.

You cannot include glVertexPointer in display lists.

When you specify a vertex array using glVertexPointer, the values of all the function's vertex array parameters are saved in a client-side state and static array elements can be cached. Because the vertex array parameters are client-side state, their values are not saved or restored by glPushAttrib and glPopAttrib.

Although no error is generated if you call glVertexPointer within glBegin and glEnd pairs, the results are undefined.

The following functions retrieve information related to glVertexPointer:

glGet with argument GL_VERTEX_ARRAY_SIZE

glGet with argument GL_VERTEX_ARRAY_STRIDE

glGet with argument GL_VERTEX_ARRAY_COUNT

glGet with argument GL_VERTEX_ARRAY_TYPE

glGetPointerv with argument GL_VERTEX_ARRAY_POINTER

glIsEnabled with argument GL_VERTEX_ARRAY

Error Codes

The following are the error codes generated and their conditions.

Error code Condition
GL_INVALID_VALUE size was not 2, 3, or 4.
GL_INVALID_ENUM type was not an accepted value.
GL_INVALID_VALUE stride or count was negative.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 or later.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in Gl.h.
  Library: Use Opengl32.lib.

See Also

glArrayElement, glColorPointer, glDrawArrays, glEdgeFlagPointer, glEnableClientState, glGetPointerv, glGetString, glIndexPointer, glIsEnabled, glNormalPointer, glTexCoordPointer


  

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