GLDRAWELEMENTSINSTAN(3G) OpenGL Manual GLDRAWELEMENTSINSTAN(3G)
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,
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.
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 GL_UNSIGNED_INT.
Specifies a pointer to the location where the indices are stored.
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 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
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(),
Copyright (C) 2010 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.
opengl.org 06/10/2014 GLDRAWELEMENTSINSTAN(3G)