glDrawElementsInstancedBaseVertex - render multiple instances of a set of
primitives from array data with a per-element offset
GLsizei count, GLenum type,
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_TRIANGLE_STRIP_ADJACENCY and GL_PATCHES are accepted.
Specifies the number of elements to be rendered.
Specifies the type of the values in indices. Must be one
of GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT, or
Specifies a pointer to the location where the indices are
Specifies the number of instances of the indexed geometry
that should be drawn.
Specifies a constant that should be added to each element
of indices when chosing elements from the enabled vertex arrays.
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
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
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.
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 © 2010-2014 Khronos Group
|Function / Feature Name