1991-2006 Silicon Graphics, Inc.
glMultiDrawArrays 3G
glMultiDrawArrays render multiple sets of primitives from array data

## C Specification

void `glMultiDrawArrays` GLenum mode const GLint * first const GLsizei * count GLsizei primcount

## Parameters

mode

  Specifies what kind of primitives to render. Symbolic constants `GL_POINTS`, `GL_LINE_STRIP`, `GL_LINE_LOOP`, `GL_LINES`, `GL_LINE_STRIP_ADJACENCY`, `GL_LINES_ADJACENCY`, `GL_TRIANGLE_STRIP`, `GL_TRIANGLE_FAN`, `GL_TRIANGLES`, `GL_TRIANGLE_STRIP_ADJACENCY` and `GL_TRIANGLES_ADJACENCY` are accepted.

first

  Points to an array of starting indices in the enabled arrays.

count

  Points to an array of the number of indices to be rendered.

primcount

  Specifies the size of the first and count

## Description

`glMultiDrawArrays` specifies multiple sets of geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertices, normals, and colors and use them to construct a sequence of primitives with a single call to `glMultiDrawArrays`.

`glMultiDrawArrays` behaves identically to glDrawArrays except that primcount separate ranges of elements are specified instead.

When `glMultiDrawArrays` is called, it uses count sequential elements from each enabled array to construct a sequence of geometric primitives, beginning with element first. mode specifies what kind of primitives are constructed, and how the array elements construct those primitives.

Vertex attributes that are modified by `glMultiDrawArrays` have an unspecified value after `glMultiDrawArrays` returns. Attributes that aren't modified remain well defined.

## Notes

`GL_LINE_STRIP_ADJACENCY`, `GL_LINES_ADJACENCY`, `GL_TRIANGLE_STRIP_ADJACENCY` and `GL_TRIANGLES_ADJACENCY` are available only if the GL version is 3.2 or greater.

## Errors

`GL_INVALID_ENUM` is generated if mode is not an accepted value.

`GL_INVALID_VALUE` is generated if primcount is negative.

`GL_INVALID_OPERATION` is generated if a non-zero buffer object name is bound to an enabled array and the buffer object's data store is currently mapped.

## See Also

glDrawElements, glDrawRangeElements

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.