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.\"     Title: glDrawRangeElements
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 01/03/2018
.\"    Manual: [FIXME: manual]
.\"    Source: [FIXME: source]
.\"  Language: English
.\"
.TH "GLDRAWRANGEELEMENTS" "3G" "01/03/2018" "[FIXME: source]" "[FIXME: manual]"
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.SH "NAME"
glDrawRangeElements \- render primitives from array data
.SH "C SPECIFICATION"
.HP \w'void\ glDrawRangeElements('u
.BI "void glDrawRangeElements(GLenum\ " "mode" ", GLuint\ " "start" ", GLuint\ " "end" ", GLsizei\ " "count" ", GLenum\ " "type" ", const\ GLvoid\ *\ " "indices" ");"
.SH "PARAMETERS"
.PP
\fImode\fR
.RS 4
Specifies what kind of primitives to render\&. Symbolic constants
\fBGL_POINTS\fR,
\fBGL_LINE_STRIP\fR,
\fBGL_LINE_LOOP\fR,
\fBGL_LINES\fR,
\fBGL_LINE_STRIP_ADJACENCY\fR,
\fBGL_LINES_ADJACENCY\fR,
\fBGL_TRIANGLE_STRIP\fR,
\fBGL_TRIANGLE_FAN\fR,
\fBGL_TRIANGLES\fR,
\fBGL_TRIANGLE_STRIP_ADJACENCY\fR,
\fBGL_TRIANGLES_ADJACENCY\fR
and
\fBGL_PATCHES\fR
are accepted\&.
.RE
.PP
\fIstart\fR
.RS 4
Specifies the minimum array index contained in
\fIindices\fR\&.
.RE
.PP
\fIend\fR
.RS 4
Specifies the maximum array index contained in
\fIindices\fR\&.
.RE
.PP
\fIcount\fR
.RS 4
Specifies the number of elements to be rendered\&.
.RE
.PP
\fItype\fR
.RS 4
Specifies the type of the values in
\fIindices\fR\&. Must be one of
\fBGL_UNSIGNED_BYTE\fR,
\fBGL_UNSIGNED_SHORT\fR, or
\fBGL_UNSIGNED_INT\fR\&.
.RE
.PP
\fIindices\fR
.RS 4
Specifies a pointer to the location where the indices are stored\&.
.RE
.SH "DESCRIPTION"
.PP
\fBglDrawRangeElements\fR
is a restricted form of
\fBglDrawElements\fR()\&.
\fImode\fR,
\fIstart\fR,
\fIend\fR, and
\fIcount\fR
match the corresponding arguments to
\fBglDrawElements\fR(), with the additional constraint that all values in the arrays
\fIcount\fR
must lie between
\fIstart\fR
and
\fIend\fR, inclusive\&.
.PP
Implementations denote recommended maximum amounts of vertex and index data, which may be queried by calling
\fBglGet\fR()
with argument
\fBGL_MAX_ELEMENTS_VERTICES\fR
and
\fBGL_MAX_ELEMENTS_INDICES\fR\&. If
end \- start + 1
is greater than the value of
\fBGL_MAX_ELEMENTS_VERTICES\fR, or if
\fIcount\fR
is greater than the value of
\fBGL_MAX_ELEMENTS_INDICES\fR, then the call may operate at reduced performance\&. There is no requirement that all vertices in the range
start end
be referenced\&. However, the implementation may partially process unused vertices, reducing performance from what could be achieved with an optimal index set\&.
.PP
When
\fBglDrawRangeElements\fR
is called, it uses
\fIcount\fR
sequential elements from an enabled array, starting at
\fIstart\fR
to construct a sequence of geometric primitives\&.
\fImode\fR
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\&.
.PP
Vertex attributes that are modified by
\fBglDrawRangeElements\fR
have an unspecified value after
\fBglDrawRangeElements\fR
returns\&. Attributes that aren\*(Aqt modified maintain their previous values\&.
.SH "NOTES"
.PP
\fBGL_LINE_STRIP_ADJACENCY\fR,
\fBGL_LINES_ADJACENCY\fR,
\fBGL_TRIANGLE_STRIP_ADJACENCY\fR
and
\fBGL_TRIANGLES_ADJACENCY\fR
are available only if the GL version is 3\&.2 or greater\&.
.SH "ERRORS"
.PP
It is an error for indices to lie outside the range
start end, but implementations may not check for this situation\&. Such indices cause implementation\-dependent behavior\&.
.PP
\fBGL_INVALID_ENUM\fR
is generated if
\fImode\fR
is not an accepted value\&.
.PP
\fBGL_INVALID_VALUE\fR
is generated if
\fIcount\fR
is negative\&.
.PP
\fBGL_INVALID_VALUE\fR
is generated if
end < start\&.
.PP
\fBGL_INVALID_OPERATION\fR
is generated if a geometry shader is active and
\fImode\fR
is incompatible with the input primitive type of the geometry shader in the currently installed program object\&.
.PP
\fBGL_INVALID_OPERATION\fR
is generated if a non\-zero buffer object name is bound to an enabled array or the element array and the buffer object\*(Aqs data store is currently mapped\&.
.SH "ASSOCIATED GETS"
.PP
\fBglGet\fR()
with argument
\fBGL_MAX_ELEMENTS_VERTICES\fR
.PP
\fBglGet\fR()
with argument
\fBGL_MAX_ELEMENTS_INDICES\fR
.SH "VERSION SUPPORT"
.TS
allbox tab(:);
lB cB s s s s s s s s s s s
lB cB cB cB cB cB cB cB cB cB cB cB cB.
T{

T}:T{
\fBOpenGL Version\fR
T}
T{
\fBFunction / Feature Name\fR
T}:T{
\fB2\&.0\fR
T}:T{
\fB2\&.1\fR
T}:T{
\fB3\&.0\fR
T}:T{
\fB3\&.1\fR
T}:T{
\fB3\&.2\fR
T}:T{
\fB3\&.3\fR
T}:T{
\fB4\&.0\fR
T}:T{
\fB4\&.1\fR
T}:T{
\fB4\&.2\fR
T}:T{
\fB4\&.3\fR
T}:T{
\fB4\&.4\fR
T}:T{
\fB4\&.5\fR
T}
.T&
l c c c c c c c c c c c c.
T{
\fBglDrawRangeElements\fR
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}:T{
✔
T}
.TE
.sp 1
.SH "SEE ALSO"
.PP
\fBglDrawArrays\fR(),
\fBglDrawElements\fR(),
\fBglDrawElementsBaseVertex\fR()
.SH "COPYRIGHT"
.PP
Copyright
\(co
1991\-2006 Silicon Graphics, Inc\&. Copyright
\(co
2010\-2014 Khronos Group\&. This document is licensed under the SGI Free Software B License\&. For details, see
\m[blue]\fBhttp://oss\&.sgi\&.com/projects/FreeB/\fR\m[]\&.
.SH "COPYRIGHT"
.br
Copyright \(co 1991-2006 Silicon Graphics, Inc.
.br
Copyright \(co 2010-2014 Khronos Group
.br