gluUnProject function

The gluUnProject function maps window coordinates to object coordinates.

Syntax

int WINAPI 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

The x window coordinate to be mapped.

winy

The y window coordinate to be mapped.

winz

The z window coordinate 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

The computed x object coordinate.

objy

The computed y object coordinate.

objz

The computed z object coordinate.

Return value

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.

Requirements

See also

glGet

glGetDoublev

glGetIntegerv

gluProject