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.\"     Title: glDepthRangeArray
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 05/21/2015
.\"    Manual: [FIXME: manual]
.\"    Source: [FIXME: source]
.\"  Language: English
.\"
.TH "GLDEPTHRANGEARRAY" "3G" "05/21/2015" "[FIXME: source]" "[FIXME: manual]"
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.SH "NAME"
glDepthRangeArray \- specify mapping of depth values from normalized device coordinates to window coordinates for a specified set of viewports
.SH "C SPECIFICATION"
.HP \w'void\ glDepthRangeArrayv('u
.BI "void glDepthRangeArrayv(GLuint\ " "first" ", GLsizei\ " "count" ", const\ GLdouble\ *" "v" ");"
.SH "PARAMETERS"
.PP
\fIfirst\fR
.RS 4
Specifies the index of the first viewport whose depth range to update\&.
.RE
.PP
\fIcount\fR
.RS 4
Specifies the number of viewports whose depth range to update\&.
.RE
.PP
\fIv\fR
.RS 4
Specifies the address of an array containing the near and far values for the depth range of each modified viewport\&.
.RE
.SH "DESCRIPTION"
.PP
After clipping and division by
\fIw\fR, depth coordinates range from
\-1
to 1, corresponding to the near and far clipping planes\&. Each viewport has an independent depth range specified as a linear mapping of the normalized depth coordinates in this range to window depth coordinates\&. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components)\&.
\fBglDepthRangeArray\fR
specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates for each viewport in the range [\fIfirst\fR,
\fIfirst\fR
+
\fIcount\fR)\&. Thus, the values accepted by
\fBglDepthRangeArray\fR
are both clamped to this range before they are accepted\&.
.PP
The
\fIfirst\fR
parameter specifies the index of the first viewport whose depth range to modify and must be less than the value of
\fBGL_MAX_VIEWPORTS\fR\&.
\fIcount\fR
specifies the number of viewports whose depth range to modify\&.
\fIfirst\fR
+
\fIcount\fR
must be less than or equal to the value of
\fBGL_MAX_VIEWPORTS\fR\&.
\fIv\fR
specifies the address of an array of pairs of double precision floating point values representing the near and far values of the depth range for each viewport, in that order\&.
.PP
The setting of (0,1) maps the near plane to 0 and the far plane to 1\&. With this mapping, the depth buffer range is fully utilized\&.
.SH "NOTES"
.PP
It is not necessary that the near plane distance be less than the far plane distance\&. Reverse mappings such as
near = 1, and
far = 0
are acceptable\&.
.PP
The type of the
\fIv\fR
parameter was changed from GLclampd to GLdouble\&. This change is transparent to user code and is described in detail on the
\fBremovedTypes\fR()
page\&.
.SH "ERRORS"
.PP
\fBGL_INVALID_VALUE\fR
is generated if
\fIfirst\fR
is greater than or equal to the value of
\fBGL_MAX_VIEWPORTS\fR\&.
.PP
\fBGL_INVALID_VALUE\fR
is generated if
\fIfirst\fR
+
\fIcount\fR
is greater than or equal to the value of
\fBGL_MAX_VIEWPORTS\fR\&.
.SH "ASSOCIATED GETS"
.PP
\fBglGet\fR()
with argument
\fBGL_DEPTH_RANGE\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{
\fBglDepthRangeArrayv\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
.SH "SEE ALSO"
.PP
\fBglDepthFunc\fR(),
\fBglDepthRange\fR(),
\fBglDepthRangeIndexed\fR(),
\fBglPolygonOffset\fR(),
\fBglViewportArray\fR(),
\fBglViewport\fR(),
\fBremovedTypes\fR()
.SH "COPYRIGHT"
.PP
Copyright
\(co
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\&.
\m[blue]\fBhttp://opencontent\&.org/openpub/\fR\m[]\&.
.SH "COPYRIGHT"
.br
Copyright \(co 2010-2014 Khronos Group
.br