GLDRAWELEMENTSINSTAN(3G)        [FIXME: manual]       GLDRAWELEMENTSINSTAN(3G)

NAME
       glDrawElementsInstancedBaseVertexBaseInstance - render multiple
       instances of a set of primitives from array data with a per-element
       offset

C SPECIFICATION
       void glDrawElementsInstancedBaseVertexBaseInstance(GLenum mode,
                                                          GLsizei count,
                                                          GLenum type,
                                                          GLvoid *indices,
                                                          GLsizei instancecount,
                                                          GLint basevertex,
                                                          GLuint baseinstance);

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.

       instancecount
           Specifies the number of instances of the indexed geometry that
           should be drawn.

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

       baseinstance
           Specifies the base instance for use in fetching instanced vertex
           attributes.

DESCRIPTION
       glDrawElementsInstancedBaseVertexBaseInstance behaves identically to
       glDrawElementsInstanced() 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.

       Specific vertex attributes may be classified as instanced through the
       use of glVertexAttribDivisor(). Instanced vertex attributes supply
       per-instance vertex data to the vertex shader. The index of the vertex
       fetched from the enabled instanced vertex attribute arrays is
       calculated as gl _ InstanceID divisor + baseInstance. Note that
       baseinstance does not affect the shader-visible value of gl_InstanceID.

NOTES
       glDrawElementsInstancedBaseVertex is only supported 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 count or instancecount 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 / 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 |
       +----------------------------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
       |glDrawElementsInstancedBaseVertexBaseInstance |  -  |  -  |  -  |  -  |  -  |  -  |  -  |  -  | <?> | <?> | <?> | <?> |
       +----------------------------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+

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

COPYRIGHT
       Copyright (C) 2011-2014 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 (C) 2011-2014 Khronos Group

[FIXME: source]                   05/21/2022          GLDRAWELEMENTSINSTAN(3G)