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author | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
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committer | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
commit | f4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch) | |
tree | 2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/polygonoffset.gl | |
parent | a840692edc9c6d19cd7c057f68e39c7d95eb767d (diff) | |
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Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz
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Imported nx-X11-3.1.0-1.tar.gz
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Diffstat (limited to 'nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/polygonoffset.gl')
-rw-r--r-- | nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/polygonoffset.gl | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/polygonoffset.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/polygonoffset.gl new file mode 100644 index 000000000..4ec2114e2 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/polygonoffset.gl @@ -0,0 +1,87 @@ +_C_ License Applicability. Except to the extent portions of this file are +_C_ made subject to an alternative license as permitted in the SGI Free +_C_ Software License B, Version 1.1 (the "License"), the contents of this +_C_ file are subject only to the provisions of the License. You may not use +_C_ this file except in compliance with the License. You may obtain a copy +_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 +_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: +_C_ +_C_ http://oss.sgi.com/projects/FreeB +_C_ +_C_ Note that, as provided in the License, the Software is distributed on an +_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS +_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND +_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A +_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT. +_C_ +_C_ Original Code. The Original Code is: OpenGL Sample Implementation, +_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, +_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. +_C_ Copyright in any portions created by third parties is as indicated +_C_ elsewhere herein. All Rights Reserved. +_C_ +_C_ Additional Notice Provisions: The application programming interfaces +_C_ established by SGI in conjunction with the Original Code are The +_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released +_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version +_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X +_C_ Window System(R) (Version 1.3), released October 19, 1998. This software +_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation +_C_ published by SGI, but has not been independently verified as being +_C_ compliant with the OpenGL(R) version 1.2.1 Specification. +_C_ +_C_ The first character in this file must be an '_'! +_C_ Anything on a line after _C_ is ignored +_define(_filters,eqn)_C_ +_C_ eqn is automatically replaced with neqn for nroff +_header(PolygonOffset, set the scale and units used to calculate depth values) +_names(PolygonOffset) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1) +Specifies a scale factor that is used to create a variable +depth offset for each polygon. The initial value is 0. +_phead(_param2) +Is multiplied by an implementation-specific value to +create a constant depth offset. The initial value is 0. +.SH DESCRIPTION +When _const(POLYGON_OFFSET_FILL), _const(POLYGON_OFFSET_LINE), or +_const(POLYGON_OFFSET_POINT) is enabled, each +fragment's \f2depth\fP value will be offset after it is interpolated +from the \f2depth\fP values of the appropriate vertices. +The value of the offset is $_eqnparam1 ~*~ DZ ~~+~~ r ~*~ _eqnparam2$, +where $DZ~$ is a measurement of the change in depth relative to the screen +area of the polygon, and $r$ is the smallest value that is guaranteed to +produce a resolvable offset for a given implementation. +The offset is added before the depth test is performed and before +the value is written into the depth buffer. +.P +_cmnd is useful for rendering hidden-line images, for applying decals +to surfaces, and for rendering solids with highlighted edges. +.SH NOTES +_cmnd is available only if the GL version is 1.1 or greater. +.P +_cmnd has no effect on depth coordinates placed in the +feedback buffer. +.P +_cmnd has no effect on selection. +.SH ERRORS +_const(INVALID_OPERATION) is generated if _cmnd is executed +between the execution of _cmnd(Begin) and the corresponding +execution of _cmnd(End). +.bp +.SH ASSOCIATED GETS +_cmnd(IsEnabled) with argument +_const(POLYGON_OFFSET_FILL), +_const(POLYGON_OFFSET_LINE), +or _const(POLYGON_OFFSET_POINT). +.P +_cmnd(Get) with argument _const(POLYGON_OFFSET_FACTOR) or +_const(POLYGON_OFFSET_UNITS). +.SH SEE ALSO +_cmnd(DepthFunc), +_cmnd(Enable), +_cmnd(Get), +_cmnd(IsEnabled) |