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,
GL_TRIANGLES_ADJACENCY and GL_PATCHES
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/.