GLDRAWELEMENTSINSTAN(3G)

    .SH "NAME" glDrawElementsInstancedBaseVertex - render multiple instances of a set of primitives from array data with a per-element offset
    .SH "C SPECIFICATION"

            .HP u void glDrawElementsInstancedBaseVertex(GLenum mode, GLsizei count, GLenum type, GLvoid *indices, GLsizei primcount, GLint basevertex);

    .SH "PARAMETERS"

        .PP 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.

            .RE
            .PP count

                        Specifies the number of elements to be rendered.

                .RE
                .PP type

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

                    .RE
                    .PP indices

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

                        .RE
                        .PP primcount

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

                            .RE
                            .PP basevertex

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

                                .RE

                            .SH "DESCRIPTION"
                                .PP glDrawElementsInstancedBaseVertex 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.

                            .SH "ERRORS"
                                .PP GL_INVALID_ENUM is generated if mode is not an accepted value.
                                .PP GL_INVALID_VALUE is generated if count or primcount is negative.
                                .PP 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.
                                .PP 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.

                            .SH "VERSION SUPPORT"
                                .TS allbox tab(:); l l l l l. T{ glDrawElementsInstancedBaseVertex T}:T{ T}:T{ T}:T{ T}:T{ T}

                            .SH "SEE ALSO"
                                .PP glDrawElements(), glDrawRangeElements(), glDrawRangeElementsBaseVertex(), glDrawElementsInstanced(), glDrawElementsInstancedBaseVertex()

                            .SH "COPYRIGHT"
                                .PP Copyright © 2010-2015 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 © 2010-2015 Khronos Group