NAME

       glDrawElementsBaseVertex - render primitives from array data with a per-element offset

C SPECIFICATION

       void glDrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type, GLvoid *indices,
                                     GLint basevertex);

PARAMETERS

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

       count
           Specifies the number of elements to be rendered.

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

       indices
           Specifies a pointer to the location where the indices are stored.

       basevertex
           Specifies a constant that should be added to each element of indices when chosing
           elements from the enabled vertex arrays.

DESCRIPTION

       glDrawElementsBaseVertex behaves identically to glDrawElements() except that the ith
       element transferred by the corresponding draw call will be taken from element indices[i] +
       basevertex of each enabled array. If the resulting value is larger than the maximum value
       representable by type, it is as if the calculation were upconverted to 32-bit unsigned
       integers (with wrapping on overflow conditions). The operation is undefined if the sum
       would be negative.

NOTES

       glDrawElementsBaseVertex is only supported if the GL version is 3.2 or greater, or if the
       ARB_draw_elements_base_vertex extension is supported.

ERRORS

       GL_INVALID_ENUM is generated if mode is not an accepted value.

       GL_INVALID_VALUE is generated if count is negative.

       GL_INVALID_OPERATION is generated if a geometry shader is active and mode is incompatible
       with the input primitive type of the geometry shader in the currently installed program
       object.

       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                 │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │/                        │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature                  │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name                     │     │     │     │     │     │     │     │     │     │     │     │     │
       ├─────────────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glDrawElementsBaseVertex │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └─────────────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘

SEE ALSO

       glDrawElements(), glDrawRangeElements(), glDrawRangeElementsBaseVertex(),
       glDrawElementsInstanced(), glDrawElementsInstancedBaseVertex()

COPYRIGHT

       Copyright © 2010-2014 Khronos Group. This material may be distributed subject to the terms
       and conditions set forth in the Open Publication License, v 1.0, 8 June 1999.
       http://opencontent.org/openpub/.

COPYRIGHT

       Copyright © 2010-2014 Khronos Group

[FIXME: source]                             01/03/2018                   GLDRAWELEMENTSBASEVE(3G)