glDrawRangeElements — render primitives from array data
void glDrawRangeElements( | GLenum | mode, |
GLuint | start, | |
GLuint | end, | |
GLsizei | count, | |
GLenum | type, | |
const GLvoid * | indices) ; |
mode
Specifies what kind of primitives to render.
Symbolic constants
GL_POINTS
,
GL_LINE_STRIP
,
GL_LINE_LOOP
,
GL_LINES
,
GL_LINE_STRIP_ADJACENCY
,
GL_LINES_ADJACENCY
,
GL_TRIANGLE_STRIP
,
GL_TRIANGLE_FAN
,
GL_TRIANGLES
,
GL_TRIANGLE_STRIP_ADJACENCY
and
GL_TRIANGLES_ADJACENCY
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.
glDrawRangeElements
is a restricted form of glDrawElements. mode
, start
, end
,
and count
match the corresponding arguments to glDrawElements, with
the additional constraint that all values in the arrays count
must lie
between start
and end
, inclusive.
Implementations denote recommended maximum amounts of vertex and
index data,
which may be queried by calling glGet with argument
GL_MAX_ELEMENTS_VERTICES
and GL_MAX_ELEMENTS_INDICES
.
If
GL_MAX_ELEMENTS_VERTICES
, or if count
is greater than the value of
GL_MAX_ELEMENTS_INDICES
, then the call may operate at reduced
performance. There is no requirement that all vertices in the range
When glDrawRangeElements
is called, it uses count
sequential elements from an
enabled array, starting at start
to construct a sequence of
geometric primitives. mode
specifies what kind of primitives are
constructed, and how the array elements construct these primitives. If
more than one array is enabled, each is used.
Vertex attributes that are modified by glDrawRangeElements
have an
unspecified value after glDrawRangeElements
returns. Attributes that aren't
modified maintain their previous values.
GL_LINE_STRIP_ADJACENCY
,
GL_LINES_ADJACENCY
,
GL_TRIANGLE_STRIP_ADJACENCY
and
GL_TRIANGLES_ADJACENCY
are available only if the GL version is 3.2 or greater.
It is an error for indices to lie outside the range
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
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.
glGet with argument GL_MAX_ELEMENTS_VERTICES
glGet with argument GL_MAX_ELEMENTS_INDICES
Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.