glDrawRangeElementsBaseVertex — render primitives from array data with a per-element offset
void glDrawRangeElementsBaseVertex( | GLenum | mode, |
GLuint | start, | |
GLuint | end, | |
GLsizei | count, | |
GLenum | type, | |
GLvoid * | indices, | |
GLint | basevertex) ; |
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
,
and GL_TRIANGLES
are accepted.
start
Specifies the minimum array index contained in indices
.
end
Specifies the maximum array index contained in indices
.
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.
basevertex
Specifies a constant that should be added to each element of indices
when chosing elements from the enabled vertex arrays.
glDrawRangeElementsBaseVertex
is a restricted form of
glDrawElementsBaseVertex. mode
,
start
, end
, count
and basevertex
match
the corresponding arguments to glDrawElementsBaseVertex, with the additional
constraint that all values in the array indices
must lie between start
and end
,
inclusive, prior to adding basevertex
. Index values lying outside the range [start
, end
]
are treated in the same way as glDrawElementsBaseVertex. 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.
glDrawRangeElementsBaseVertex
is only supported if the GL version is 3.2 or greater, or if
the ARB_draw_elements_base_vertex
extension is supported.
GL_INVALID_ENUM
is generated if mode
is not an accepted value.
GL_INVALID_VALUE
is generated if count
is negative.
GL_INVALID_VALUE
is generated if end
< start
.
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, glDrawElementsBaseVertex, glDrawRangeElements, glDrawElementsInstanced, glDrawElementsInstancedBaseVertex
Copyright © 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. http://opencontent.org/openpub/.