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diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/ortho.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/ortho.gl new file mode 100644 index 000000000..d9887b90b --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/ortho.gl @@ -0,0 +1,114 @@ +_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(Ortho,multiply the current matrix with an orthographic matrix) +_names(Ortho) +.SH PARAMETERS +_phead(_param1 _param2) +Specify the coordinates for the left and right vertical clipping planes. +_phead(_param3 _param4) +Specify the coordinates for the bottom and top horizontal clipping planes. +_phead(_param5 _param6) +Specify the distances to the nearer and farther depth clipping planes. +These values are negative if the plane is to be behind the viewer. +.SH DESCRIPTION +_cmnd describes a transformation that produces a parallel projection. +The current matrix (see _cmnd(MatrixMode)) is multiplied by this matrix +and the result replaces the current matrix, as if +_cmnd(MultMatrix) were called with the following matrix +as its argument: +.sp +.ce +.EQ +left ( matrix { + ccol { {2 over {_eqnparam2 - _eqnparam1}} above 0 above 0 above 0 } + ccol { 0 above {2 over {_eqnparam4 - _eqnparam3}} above 0 above 0 } + ccol { 0 above 0 above {-2 over {_eqnparam6 - _eqnparam5}} above 0 } + ccol { {t sub x}~ above {t sub y}~ above {t sub z}~ above 1~ } +} right ) +.EN +.BP +.P +where +.ce +.EQ +t sub x ~=~ -^{{_eqnparam2 ~+~ _eqnparam1} over {_eqnparam2 ~-~ _eqnparam1}} +.EN + +.ce +.EQ +t sub y ~=~ -^{{_eqnparam4 ~+~ _eqnparam3} over {_eqnparam4 ~-~ _eqnparam3}} +.EN + +.ce +.EQ +t sub z ~=~ -^{{_eqnparam6 ~+~ _eqnparam5} over {_eqnparam6 ~-~ _eqnparam5}} +.EN + +.RE +.P +Typically, the matrix mode is _const(PROJECTION), and +(_param1, _param3, \-_param5) and (_param2, _param4, \-_param5) +specify the points on the near clipping plane that are mapped +to the lower left and upper right corners of the window, +respectively, +assuming that the eye is located at (0, 0, 0). +\-_param6 specifies the location of the far clipping plane. +Both _param5 and _param6 can be either positive or negative. +.P +Use _cmnd(PushMatrix) and _cmnd(PopMatrix) to save and restore +the current matrix stack. +.SH ERRORS +_const(INVALID_OPERATION) is generated if _cmnd +is executed between the execution of +_cmnd(Begin) +and the corresponding execution of _cmnd(End). +.SH ASSOCIATED GETS +_cmnd(Get) with argument _const(MATRIX_MODE) +.br +_cmnd(Get) with argument _const(COLOR_MATRIX) +.br +_cmnd(Get) with argument _const(MODELVIEW_MATRIX) +.br +_cmnd(Get) with argument _const(PROJECTION_MATRIX) +.br +_cmnd(Get) with argument _const(TEXTURE_MATRIX) +.SH SEE ALSO +_cmnd(Frustum), +_cmnd(MatrixMode), +_cmnd(MultMatrix), +_cmnd(PushMatrix), +_cmnd(Viewport) |