glDrawElementsInstancedBaseVertex - render multiple instances of a set of primitives from array data with a per-element offset
void glDrawElementsInstancedBaseVertex(GLenum mode, GLsizei count, GLenum type, GLvoid *indices, GLsizei primcount, GLint basevertex);
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.
glDrawElementsInstancedBaseVertex is only supported if the GL version is 3.2 or greater.
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_VALUE is generated if count or primcount 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.
glDrawElements(), glDrawRangeElements(), glDrawRangeElementsBaseVertex(), glDrawElementsInstanced(), glDrawElementsInstancedBaseVertex()
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