gluproject(3g) [centos man page]

GLUPROJECT(3G)							   OpenGL Manual						    GLUPROJECT(3G)

NAME

       gluProject - map object coordinates to window coordinates

C SPECIFICATION

       GLint gluProject(GLdouble objX, GLdouble objY, GLdouble objZ, const GLdouble * model, const GLdouble * proj, const GLint * view,
			GLdouble* winX, GLdouble* winY, GLdouble* winZ);

PARAMETERS

       objX, objY, objZ
	   Specify the object coordinates.

       model
	   Specifies the current modelview matrix (as from a glGetDoublev() call).

       proj
	   Specifies the current projection matrix (as from a glGetDoublev() call).

       view
	   Specifies the current viewport (as from a glGetIntegerv() call).

       winX, winY, winZ
	   Return the computed window coordinates.

DESCRIPTION

       gluProject transforms the specified object coordinates into window coordinates using model, proj, and view. The result is stored in winX,
       winY, and winZ. A return value of GLU_TRUE indicates success, a return value of GLU_FALSE indicates failure.

       To compute the coordinates, let v = objX objY objZ 1.0 represented as a matrix with 4 rows and 1 column. Then gluProject computes v '' as
       follows:

       v '' = P x M x v

       where P is the current projection matrix proj and M is the current modelview matrix model (both represented as 4 x 4 matrices in
       column-major order).

       The window coordinates are then computed as follows:

       winX = view  0 + view  2 x v ''	0 + 1 2.PP winY = view	1 + view  3 x v ''  1 + 1 2.PP winZ = v ''  2 + 1 2

SEE ALSO

       gluUnProject(), glGet()

COPYRIGHT

       Copyright (C) 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/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014							    GLUPROJECT(3G)

Check Out this Related Man Page

GLUUNPROJECT(3G)						   OpenGL Manual						  GLUUNPROJECT(3G)

NAME

       gluUnProject - map window coordinates to object coordinates

C SPECIFICATION

       GLint gluUnProject(GLdouble winX, GLdouble winY, GLdouble winZ, const GLdouble * model, const GLdouble * proj, const GLint * view,
			  GLdouble* objX, GLdouble* objY, GLdouble* objZ);

PARAMETERS

       winX, winY, winZ
	   Specify the window coordinates to be mapped.

       model
	   Specifies the modelview matrix (as from a glGetDoublev() call).

       proj
	   Specifies the projection matrix (as from a glGetDoublev() call).

       view
	   Specifies the viewport (as from a glGetIntegerv() call).

       objX, objY, objZ
	   Returns the computed object coordinates.

DESCRIPTION

       gluUnProject maps the specified window coordinates into object coordinates using model, proj, and view. The result is stored in objX, objY,
       and objZ. A return value of GLU_TRUE indicates success; a return value of GLU_FALSE indicates failure.

       To compute the coordinates objX objY objZ, gluUnProject multiplies the normalized device coordinates by the inverse of model * proj as
       follows:

       objX objY objZ W = INV  P  M  2	winX - view  0 view  2 - 1 2  winY - view  1 view  3 - 1 2  winZ - 1 1INV denotes matrix inversion. W is
       an unused variable, included for consistent matrix notation.

SEE ALSO

       gluProject(), glGet()

COPYRIGHT

       Copyright (C) 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/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014							  GLUUNPROJECT(3G)

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gluproject(3g) [centos man page]

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