gluUnProject

The gluUnProject function maps window coordinates to object coordinates.

int gluUnProject(
  GLdouble winx,                   
  GLdouble winy,                   
  GLdouble winz,                   
  const GLdouble modelMatrix[16],   
  const GLdouble projMatrix[16],   
  const GLint viewport[4],         
  GLdouble * objx,                 
  GLdouble * objy,                 
  GLdouble * objz                  
);
 

Parameters

winx, winy, winz

The window coordinates to be mapped.

modelMatrix

The modelview matrix (as from a glGetDoublev call).

projMatrix

The projection matrix (as from a glGetDoublev call).

viewport

The viewport (as from a glGetIntegerv call).

objx, objy, objz

The computed object coordinates.

Return Values

If the function succeeds, the return value is GL_TRUE.

If the function fails, the return value is GL_FALSE.

Remarks

The gluUnProject function maps the specified window coordinates into object coordinates using modelMatrix, projMatrix, and viewport. The result is stored in objx, objy, and objz.

QuickInfo

  Windows NT: Use version 3.5 and later.
  Windows: Use Windows 95 and later.
  Windows CE: Unsupported.
  Header: Declared in glu.h.
  Import Library: Link with glu32.lib.

See Also

glGet, glGetDoublev, glGetIntegerv, gluProject