"""glu[Un]Project[4] convenience wrappers""" from OpenGL.raw import GLU as _simple from OpenGL import GL from OpenGL.lazywrapper import lazy as _lazy import ctypes POINTER = ctypes.POINTER @_lazy( _simple.gluProject ) def gluProject( baseFunction, objX, objY, objZ, model=None, proj=None, view=None ): """Convenience wrapper for gluProject Automatically fills in the model, projection and viewing matrices if not provided. returns (winX,winY,winZ) doubles """ if model is None: model = GL.glGetDoublev( GL.GL_MODELVIEW_MATRIX ) if proj is None: proj = GL.glGetDoublev( GL.GL_PROJECTION_MATRIX ) if view is None: view = GL.glGetIntegerv( GL.GL_VIEWPORT ) winX = _simple.GLdouble( 0.0 ) winY = _simple.GLdouble( 0.0 ) winZ = _simple.GLdouble( 0.0 ) result = baseFunction( objX,objY,objZ, model,proj,view, winX,winY,winZ, ) # On Ubuntu 9.10 we see a None come out of baseFunction, # despite it having a return-type specified of GLint! if result is not None and result != _simple.GLU_TRUE: raise ValueError( """Projection failed!""" ) return winX.value, winY.value, winZ.value @_lazy( _simple.gluUnProject ) def gluUnProject( baseFunction, winX, winY, winZ, model=None, proj=None, view=None ): """Convenience wrapper for gluUnProject Automatically fills in the model, projection and viewing matrices if not provided. returns (objX,objY,objZ) doubles """ if model is None: model = GL.glGetDoublev( GL.GL_MODELVIEW_MATRIX ) if proj is None: proj = GL.glGetDoublev( GL.GL_PROJECTION_MATRIX ) if view is None: view = GL.glGetIntegerv( GL.GL_VIEWPORT ) objX = _simple.GLdouble( 0.0 ) objY = _simple.GLdouble( 0.0 ) objZ = _simple.GLdouble( 0.0 ) result = baseFunction( winX,winY,winZ, model,proj,view, ctypes.byref(objX),ctypes.byref(objY),ctypes.byref(objZ), ) if not result: raise ValueError( """Projection failed!""" ) return objX.value, objY.value, objZ.value @_lazy( _simple.gluUnProject4 ) def gluUnProject4( baseFunction, winX, winY, winZ, clipW, model=None, proj=None, view=None, near=0.0, far=1.0 ): """Convenience wrapper for gluUnProject Automatically fills in the model, projection and viewing matrices if not provided. returns (objX,objY,objZ) doubles """ if model is None: model = GL.glGetDoublev( GL.GL_MODELVIEW_MATRIX ) if proj is None: proj = GL.glGetDoublev( GL.GL_PROJECTION_MATRIX ) if view is None: view = GL.glGetIntegerv( GL.GL_VIEWPORT ) objX = _simple.GLdouble( 0.0 ) objY = _simple.GLdouble( 0.0 ) objZ = _simple.GLdouble( 0.0 ) objW = _simple.GLdouble( 0.0 ) result = baseFunction( winX,winY,winZ, model,proj,view, ctypes.byref(objX),ctypes.byref(objY),ctypes.byref(objZ),ctypes.byref(objW) ) if not result: raise ValueError( """Projection failed!""" ) return objX.value, objY.value, objZ.value, objW.value __all__ = ( 'gluProject', 'gluUnProject', 'gluUnProject4', )