# PySoy's fields Declarations
#
# Copyright (C) 2006,2007,2008 PySoy Group
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU Affero General Public License as published
#  by the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU Affero General Public License for more details.
#
#  You should have received a copy of the GNU Affero General Public License
#  along with this program; if not, see http://www.gnu.org/licenses
#
#  $Id$

cimport ode
cimport soy._internals
cimport soy.bodies

cdef class Field (soy.bodies.Body) :
  cdef void                     _give            ( self, int )            nogil
  cdef int                      _apply           ( self )                 nogil
  cdef int                      _exert           ( self, 
                                                   soy.bodies.Body )      nogil
  cdef void                     _commit          ( self )                 nogil


cdef class Monopole (Field) :
  cdef soy._internals.Children  _affected
  cdef float	                _multiplier


cdef class Wind (Field) :
  cdef float            _density
  cdef float            _vx
  cdef float            _vy
  cdef float            _vz

cdef class Shockwave (Field) :
  cdef ode.dSpaceID             _space
  cdef float                    _radius
  cdef double                   _t0
  cdef double                   _inner
  cdef double                   _outer
  cdef float                    _velocity
  cdef float                    _length
  cdef float                    _energy

cdef class Buoyancy (Field) :
  cdef soy._internals.Children  _affected
  cdef float                    _density

cdef extern from "math.h" nogil :
  float powf (float x, float y)