GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
GLUUNPROJECT() GLUUNPROJECT()

gluUnProject - map window coordinates to object coordinates

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

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.

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 GL_TRUE indicates success; a return value of GL_FALSE indicates failure.

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


objXobjYobjZW=INV(PM)2(winXview[0])view[2]12(winYview[1])view[3]12(winZ)11

INV() denotes matrix inversion. W is an unused variable, included for consistent matrix notation.

glGet, gluProject

Search for    or go to Top of page |  Section other |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.