OpenGL2D_2_3D

OpenGL

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.

Requirements