GLMULTIDRAWELEMENTS(3G)

NAME
glMultiDrawElements - render multiple sets of primitives by specifying indices of array data elements

C SPECIFICATION

void glMultiDrawElements(GLenum mode, const GLsizei * count, GLenum type, const void * const * indices, GLsizei drawcount);

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.

count
    Points to an array of the elements counts.

type
    Specifies the type of the values in indices. Must be one of GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, or GL_UNSIGNED_INT.

indices
    Points to an array of byte offsets (cast to a pointer type) into the buffer bound to GL_ELEMENT_ARRAY_BUFFER to start reading indices from.

drawcount
    Specifies the size of the count and indices arrays.

DESCRIPTION

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

glMultiDrawElements is identical in operation to glDrawElements() except that drawcount separate lists of elements are specified.

Vertex attributes that are modified by glMultiDrawElements have an unspecified value after glMultiDrawElements returns. Attributes that aren't modified maintain their previous values.

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 drawcount is negative.

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

VERSION SUPPORT
 | OpenGL Version
Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 | 4.6
glMultiDrawElements | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔

SEE ALSO

glDrawArrays(), glDrawRangeElements()

COPYRIGHT

Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see https://khronos.org/registry/OpenGL-Refpages/LICENSES/LicenseRef-FreeB.txt.

COPYRIGHT
Copyright © 2010-2014 Khronos Group