blender-archive/source/blender/python/api2_2x/Metaball.c

/* 
 * $Id$
 *
 * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * This is a new part of Blender.
 *
 * Contributor(s): Jacques Guignot
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

#include "Metaball.h"

PyObject * Metaball_Init (void);
PyObject * Metaball_CreatePyObject (MetaBall *metaball);
MetaBall * Metaball_FromPyObject   (PyObject *py_obj);
int        Metaball_CheckPyObject  (PyObject *py_obj);

/*****************************************************************************/
/* Python Metaball_Type structure definition:                                  */
/*****************************************************************************/
PyTypeObject Metaball_Type =
	{
		PyObject_HEAD_INIT(NULL)
		0,                                      /* ob_size */
		"Metaball",                               /* tp_name */
		sizeof (BPy_Metaball),                      /* tp_basicsize */
		0,                                      /* tp_itemsize */
		/* methods */
		(destructor)MetaballDeAlloc,              /* tp_dealloc */
		0,                 /* tp_print */
		(getattrfunc)MetaballGetAttr,             /* tp_getattr */
		(setattrfunc)MetaballSetAttr,             /* tp_setattr */
		0,                                      /* tp_compare */
		(reprfunc)MetaballRepr,                   /* tp_repr */
		0,                                      /* tp_as_number */
		0,                                      /* tp_as_sequence */
		0,                                      /* tp_as_mapping */
		0,                                      /* tp_as_hash */
		0,0,0,0,0,0,
		0,                                      /* tp_doc */ 
		0,0,0,0,0,0,
		BPy_Metaball_methods,                       /* tp_methods */
		0,                                      /* tp_members */
	};


PyTypeObject Metaelem_Type =
	{
		PyObject_HEAD_INIT(NULL)
		0,                                      /* ob_size */
		"Metaelem",                               /* tp_name */
		sizeof (BPy_Metaelem),                      /* tp_basicsize */
		0,                                      /* tp_itemsize */
		/* methods */
		(destructor)MetaelemDeAlloc,              /* tp_dealloc */
		0,                 /* tp_print */
		(getattrfunc)MetaelemGetAttr,             /* tp_getattr */
		(setattrfunc)MetaelemSetAttr,             /* tp_setattr */
		0,                                      /* tp_compare */
		(reprfunc)MetaelemRepr,                   /* tp_repr */
		0,                                      /* tp_as_number */
		0,                                      /* tp_as_sequence */
		0,                                      /* tp_as_mapping */
		0,                                      /* tp_as_hash */
		0,0,0,0,0,0,
		0,                                      /* tp_doc */ 
		0,0,0,0,0,0,
		BPy_Metaelem_methods,                       /* tp_methods */
		0,                                      /* tp_members */
	};

/*****************************************************************************/
/* Function:              M_Metaball_New                                     */
/* Python equivalent:     Blender.Metaball.New                               */
/*****************************************************************************/
static PyObject *M_Metaball_New(PyObject *self, PyObject *args)
{
  char*name = 0;
  BPy_Metaball    *pymball; /* for Data object wrapper in Python */
  MetaBall      *blmball; /* for actual Data we create in Blender */
  char        buf[21];
  if (!PyArg_ParseTuple(args, "|s", &name))
    return (EXPP_ReturnPyObjError (PyExc_TypeError,
				   "expected string argument (or nothing)"));

  blmball = add_mball(); /* first create the MetaBall Data in Blender */

  if (blmball){ 
    /* return user count to zero since add_mball() incref'ed it */
    blmball->id.us = 0; 
    /* now create the wrapper obj in Python */
    pymball = (BPy_Metaball *)PyObject_NEW(BPy_Metaball, &Metaball_Type);
  }
  else
    return (EXPP_ReturnPyObjError (PyExc_RuntimeError,
				   "couldn't create MetaBall Data in Blender"));

  if (pymball == NULL)
    return (EXPP_ReturnPyObjError (PyExc_MemoryError,
				   "couldn't create MetaBall Data object"));

  pymball->metaball = blmball; 
  /*link Python mballer wrapper to Blender MetaBall */
  if(name) { /* user gave us a name for the metaball, use it */
    PyOS_snprintf(buf, sizeof(buf), "%s", name);
    rename_id(&blmball->id, buf); 
  }
  return (PyObject *)pymball;
}


/*****************************************************************************/
/* Function:              M_Metaball_Get                                     */
/* Python equivalent:     Blender.Metaball.Get                               */
/* Description:           Receives a string and returns the metaball data obj */
/*                        whose name matches the string.  If no argument is  */
/*                        passed in, a list of all metaball data names in the */
/*                        current scene is returned.                         */
/*****************************************************************************/
static PyObject *M_Metaball_Get(PyObject *self, PyObject *args)
{
      char error_msg[64];
  char   *name = NULL;
  MetaBall *mball_iter;

  if (!PyArg_ParseTuple(args, "|s", &name))
    return (EXPP_ReturnPyObjError (PyExc_TypeError,
				   "expected string argument (or nothing)"));

  mball_iter = G.main->mball.first;

  if (name) { /* (name) - Search mball by name */

    BPy_Metaball *wanted_mball = NULL;

    while ((mball_iter) && (wanted_mball == NULL)) {
      if (strcmp (name, mball_iter->id.name+2) == 0) {
	wanted_mball=(BPy_Metaball*)PyObject_NEW(BPy_Metaball,&Metaball_Type);
	if (wanted_mball) 
	  wanted_mball->metaball = mball_iter;
      }
      mball_iter = mball_iter->id.next;
    }

    if (wanted_mball == NULL) { /* Requested mball doesn't exist */
      PyOS_snprintf(error_msg, sizeof(error_msg),
		    "MetaBall \"%s\" not found", name);
      return (EXPP_ReturnPyObjError (PyExc_NameError, error_msg));
    }

    return (PyObject *)wanted_mball;
  }

  else { /* () - return a list of all mballs in the scene */
    PyObject *mballlist;

    mballlist = PyList_New (0);

    if (mballlist == NULL)
      return (EXPP_ReturnPyObjError (PyExc_MemoryError,
				       "couldn't create PyList"));

    while (mball_iter) {
			BPy_Metaball *found_mball=(BPy_Metaball*)PyObject_NEW(BPy_Metaball,&Metaball_Type);
			found_mball->metaball = mball_iter;
      PyList_Append (mballlist,   (PyObject *)found_mball);
      mball_iter = mball_iter->id.next;
    }

    return (mballlist);
  }

}

/******************************************************************************/
/* Function:              Metaball_Init                                       */
/******************************************************************************/
PyObject *Metaball_Init (void)
{
  PyObject  *submodule;

  Metaball_Type.ob_type = &PyType_Type;

  submodule = Py_InitModule3("Blender.Metaball",
			     M_Metaball_methods, M_Metaball_doc);

  return (submodule);
}

int
Metaball_CheckPyObject (PyObject * pyobj)
{
  return (pyobj->ob_type == &Metaball_Type);
}


MetaBall * Metaball_FromPyObject (PyObject * pyobj)
{
  return ((BPy_Metaball *) pyobj)->metaball;
}

/*******************************************************************************/
/* Python BPy_Metaball methods:                                                  */
/*******************************************************************************/
void*MEM_callocN(unsigned int,char*);
void allqueue(unsigned short,short);

static PyObject *Metaball_addMetaelem(BPy_Metaball *self,PyObject*args)
{
	MetaElem *ml;
	PyObject *listargs=0;
	int type,lay;
	float x,y,z,rad,s,expx,expy,expz;
  if (!PyArg_ParseTuple(args, "O", &listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
	if (!PyList_Check(listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));


	type = PyInt_AsLong( PyList_GetItem(listargs,0));
	x = PyFloat_AsDouble(PyList_GetItem(listargs,1));
	y = PyFloat_AsDouble(PyList_GetItem(listargs,2));
	z = PyFloat_AsDouble(PyList_GetItem(listargs,3));
	rad = PyFloat_AsDouble(PyList_GetItem(listargs,4));
	lay = PyInt_AsLong(PyList_GetItem(listargs,5));
	s = PyFloat_AsDouble(PyList_GetItem(listargs,6));
	expx = PyFloat_AsDouble(PyList_GetItem(listargs,7));
	expy = PyFloat_AsDouble(PyList_GetItem(listargs,8));
	expz = PyFloat_AsDouble(PyList_GetItem(listargs,9));

	ml= MEM_callocN(sizeof(MetaElem), "metaelem");
	BLI_addhead(&(self->metaball->elems), ml);

	ml->x= x;ml->y= y;ml->z= z;
	ml->rad= rad;
	ml->lay= lay;
	ml->s= s;
	ml->flag= SELECT; 
	ml->type = type;
  ml->expx= expx;ml->expy= expy;ml->expz= expz;
	ml->type = type;
	allqueue(0X4013, 0);
	Py_INCREF(Py_None);
	return Py_None;
}

static PyObject *Metaball_getName(BPy_Metaball *self)
{

  PyObject *attr = PyString_FromString(self->metaball->id.name+2);

  if (attr) return attr;

  return (EXPP_ReturnPyObjError (PyExc_RuntimeError,
				 "couldn't get Metaball.name attribute"));
}



static PyObject *Metaball_setName(BPy_Metaball *self,PyObject*args)
{
	char   *name = NULL;
	char buf[20];


	if (!PyArg_ParseTuple(args, "s", &name))
		return (EXPP_ReturnPyObjError (PyExc_TypeError,
																	 "expected string argument"));
	PyOS_snprintf(buf, sizeof(buf), "%s", name);
	rename_id(&self->metaball->id, buf); 
	Py_INCREF(Py_None);
	return Py_None;
}





static PyObject *Metaball_getBbox(BPy_Metaball *self)
{
	int i,j;
	PyObject* ll;
  PyObject* l = PyList_New(0);
	if (self->metaball->bb == NULL) {Py_INCREF(Py_None);return Py_None;}
	for(i = 0;i<8;i++)
		{
			ll = PyList_New(0);
			for(j = 0;j<3;j++)
				PyList_Append( ll, PyFloat_FromDouble(self->metaball->bb->vec[i][j]));
			PyList_Append( l, ll);
		}

  return l;
}

static PyObject *Metaball_getNMetaElems(BPy_Metaball *self)
{
  int i = 0;
  MetaElem*ptr = self->metaball->elems.first;
  if(!ptr) return (PyInt_FromLong(0) );
  while(ptr)
    {
      i++;
      ptr = ptr->next;
    }
  return (PyInt_FromLong(i) );
}




static PyObject *Metaball_getloc(BPy_Metaball *self)
{
  PyObject* l = PyList_New(0);
  PyList_Append( l, PyFloat_FromDouble(self->metaball->loc[0]));
  PyList_Append( l, PyFloat_FromDouble(self->metaball->loc[1]));
  PyList_Append( l, PyFloat_FromDouble(self->metaball->loc[2]));
  return l;
}

static PyObject *Metaball_setloc(BPy_Metaball *self,PyObject*args)
{	
	PyObject *listargs=0;
	int i;
  if (!PyArg_ParseTuple(args, "O", &listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
  if (!PyList_Check(listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
	for(i=0;i<3;i++){
		PyObject * xx = PyList_GetItem(listargs,i);
		self->metaball->loc[i] = PyFloat_AsDouble(xx);
	}
  Py_INCREF(Py_None);
  return Py_None;
}

static PyObject *Metaball_getrot(BPy_Metaball *self)
{
  PyObject* l = PyList_New(0);
  PyList_Append( l, PyFloat_FromDouble(self->metaball->rot[0]));
  PyList_Append( l, PyFloat_FromDouble(self->metaball->rot[1]));
  PyList_Append( l, PyFloat_FromDouble(self->metaball->rot[2]));
  return l;
}

static PyObject *Metaball_setrot(BPy_Metaball *self,PyObject*args)
{	
	PyObject *listargs=0;
	int i;
  if (!PyArg_ParseTuple(args, "O", &listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
  if (!PyList_Check(listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
	for(i=0;i<3;i++){
		PyObject * xx = PyList_GetItem(listargs,i);
		self->metaball->rot[i] = PyFloat_AsDouble(xx);
	}
  Py_INCREF(Py_None);
  return Py_None;
}

static PyObject *Metaball_getsize(BPy_Metaball *self)
{
  PyObject* l = PyList_New(0); 

  PyList_Append( l, PyFloat_FromDouble(self->metaball->size[0]));
  PyList_Append( l, PyFloat_FromDouble(self->metaball->size[1]));
  PyList_Append( l, PyFloat_FromDouble(self->metaball->size[2]));
  return l;
}




static PyObject *Metaball_getMetaElemList(BPy_Metaball *self)
{	
	MetaElem *ptr;
  PyObject* l = PyList_New(0);
  ptr = self->metaball->elems.first;
  if(!ptr)  return l ;
	while(ptr)
		{	
BPy_Metaelem *found_melem=(BPy_Metaelem*)PyObject_NEW(BPy_Metaelem,&Metaelem_Type);
			found_melem->metaelem = ptr;
      PyList_Append (l,   (PyObject *)found_melem);
			ptr = ptr->next;
		}
  return l;
}


static PyObject *Metaball_setsize(BPy_Metaball *self,PyObject*args)
{	
	PyObject *listargs=0;
	int i;
  if (!PyArg_ParseTuple(args, "O", &listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
  if (!PyList_Check(listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
	for(i=0;i<3;i++){
		PyObject * xx = PyList_GetItem(listargs,i);
		self->metaball->size[i] = PyFloat_AsDouble(xx);
	}
  Py_INCREF(Py_None);
  return Py_None;
}

static PyObject *Metaball_getWiresize(BPy_Metaball *self)
{
  return PyFloat_FromDouble(self->metaball->wiresize);
}

static PyObject *Metaball_setWiresize(BPy_Metaball *self,PyObject*args)
{	
	
  float val;
  if (!PyArg_ParseTuple(args, "f", &val))
    return (EXPP_ReturnPyObjError (PyExc_TypeError,"expected float args"));
 
  self->metaball->wiresize = val;

  Py_INCREF(Py_None);
  return Py_None;

}
static PyObject *Metaball_getRendersize(BPy_Metaball *self)
{
  return PyFloat_FromDouble(self->metaball->rendersize);
}

static PyObject *Metaball_setRendersize(BPy_Metaball *self,PyObject*args)
{	
	
  float val;
  if (!PyArg_ParseTuple(args, "f", &val))
    return (EXPP_ReturnPyObjError (PyExc_TypeError,"expected float args"));
 
  self->metaball->rendersize = val;

  Py_INCREF(Py_None);
  return Py_None;

}
static PyObject *Metaball_getThresh(BPy_Metaball *self)
{
  return PyFloat_FromDouble(self->metaball->thresh);
}

static PyObject *Metaball_setThresh(BPy_Metaball *self,PyObject*args)
{	
	
  float val;
  if (!PyArg_ParseTuple(args, "f", &val))
    return (EXPP_ReturnPyObjError (PyExc_TypeError,"expected float args"));
 
  self->metaball->thresh = val;

  Py_INCREF(Py_None);
  return Py_None;

}


/*******************************************************************************/
/* get/set metaelems data,                                                     */
/*******************************************************************************/

static PyObject *Metaball_getMetadata(BPy_Metaball *self,PyObject*args)
{	
  int num;
  int i = 0;
  char*name = NULL;
	MetaElem *ptr;

  if (!PyArg_ParseTuple(args, "si", &name,&num))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, \
				   "expected (string int) argument"));
  /*jump to the num-th MetaElem*/
  ptr = self->metaball->elems.first;
  if(!ptr) 
    return  (EXPP_ReturnPyObjError (PyExc_TypeError, "no metaelem found"));
  for(i = 0;i<num;i++)
    {
      if(!ptr) 
	return  (EXPP_ReturnPyObjError (PyExc_TypeError, "metaelem not found"));
      ptr = ptr->next;
    }
  if(!strcmp(name,"type"))
    return (PyInt_FromLong(ptr->type));
  if(!strcmp(name,"x"))
    return (PyFloat_FromDouble(ptr->x));
  if(!strcmp(name,"y"))
    return (PyFloat_FromDouble(ptr->y));
  if(!strcmp(name,"z"))
    return (PyFloat_FromDouble(ptr->z));
  if(!strcmp(name,"expx"))
    return (PyFloat_FromDouble(ptr->expx));
  if(!strcmp(name,"expy"))
    return (PyFloat_FromDouble(ptr->expy));
  if(!strcmp(name,"expz"))
    return (PyFloat_FromDouble(ptr->expz));
  if(!strcmp(name,"rad"))
    return (PyFloat_FromDouble(ptr->rad));
  if(!strcmp(name,"rad2"))
    return (PyFloat_FromDouble(ptr->rad2));
  if(!strcmp(name,"s"))
    return (PyFloat_FromDouble(ptr->s));
  if(!strcmp(name,"len"))
    return (PyFloat_FromDouble(ptr->len));

  return (EXPP_ReturnPyObjError (PyExc_TypeError, "unknown name "));
}



static PyObject *Metaball_setMetadata(BPy_Metaball *self,PyObject*args)
{	
  int num;
  int i = 0;
  char*name = NULL;
  int intval=-1;
  float floatval=0;
	MetaElem *ptr;

  if (!PyArg_ParseTuple(args, "sif", &name,&num,&floatval))
return (EXPP_ReturnPyObjError (PyExc_TypeError,"expected string, int, float arguments"));
	intval = (int)floatval;
	printf("%f %d %s %d\n",floatval,intval,name,num);
  /*jump to the num-th MetaElem*/
  ptr = self->metaball->elems.first;
  if(!ptr) 
    return  (EXPP_ReturnPyObjError (PyExc_TypeError, "metaelem not found"));
  for(i = 0;i<num;i++)
    {
      if(!ptr) 
	return  (EXPP_ReturnPyObjError (PyExc_TypeError, "metaelem not found"));
      ptr = ptr->next;
    }
  if(!strcmp(name,"type"))
    {ptr->type=intval;return (PyInt_FromLong(intval));}
  if(!strcmp(name,"x"))
    {ptr->x=floatval;printf("%p %f\n",ptr,floatval);return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"y"))
    {ptr->y=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"z"))
    {ptr->z=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"expx"))
    {ptr->expx=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"expy"))
    {ptr->expy=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"expz"))
    {ptr->expz=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"rad"))
    {ptr->rad=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"rad2"))
    {ptr->rad2=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"s"))
    {ptr->s=floatval;return (PyFloat_FromDouble(floatval));}
  if(!strcmp(name,"len"))
    {ptr->len=floatval;return (PyFloat_FromDouble(floatval));}

  return (EXPP_ReturnPyObjError (PyExc_TypeError, "unknown field "));
}

static PyObject *Metaball_getMetatype(BPy_Metaball *self,PyObject*args)
{	
  int num;
  int i = 0;
  MetaElem*ptr = self->metaball->elems.first;
  if (!PyArg_ParseTuple(args, "i", &num))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, \
				   "expected int argument"));
  if(!ptr) return (PyInt_FromLong(0));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  return (PyInt_FromLong(ptr->type));
}



static PyObject *Metaball_setMetatype(BPy_Metaball *self,PyObject*args)
{	
  int num,val, i = 0;
  MetaElem*ptr = self->metaball->elems.first;
  if (!PyArg_ParseTuple(args, "ii", &num,&val))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected int int arguments"));
  if(!ptr)  return (EXPP_ReturnPyObjError (PyExc_TypeError, "No MetaElem"));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  ptr->type = val;

  Py_INCREF(Py_None);
  return Py_None;

}


static PyObject *Metaball_getMetax(BPy_Metaball *self,PyObject*args)
{	
  MetaElem*ptr = self->metaball->elems.first;
  int num;
  int i = 0;
  if (!PyArg_ParseTuple(args, "i", &num))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int argument"));
  if(!ptr) return (PyFloat_FromDouble(0));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  return (PyFloat_FromDouble(ptr->x));
}



static PyObject *Metaball_setMetax(BPy_Metaball *self,PyObject*args)
{	
  MetaElem*ptr = self->metaball->elems.first;
  int num, i = 0;
  float val;
  if (!PyArg_ParseTuple(args, "if", &num,&val))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected int float args"));
  if(!ptr)  return (EXPP_ReturnPyObjError (PyExc_TypeError, "No MetaElem"));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  ptr->x = val;

  Py_INCREF(Py_None);
  return Py_None;

}
static PyObject *Metaball_getMetay(BPy_Metaball *self,PyObject*args)
{	
  MetaElem*ptr = self->metaball->elems.first;
  int num;
  int i = 0;
  if (!PyArg_ParseTuple(args, "i", &num))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int argument"));
  if(!ptr) return (PyFloat_FromDouble(0));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  return (PyFloat_FromDouble(ptr->y));
}



static PyObject *Metaball_setMetay(BPy_Metaball *self,PyObject*args)
{	
  MetaElem*ptr = self->metaball->elems.first;
  int num, i = 0;
  float val;
  if (!PyArg_ParseTuple(args, "if", &num,&val))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int float args"));
  if(!ptr)  return (EXPP_ReturnPyObjError (PyExc_TypeError, "No MetaElem"));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  ptr->y = val;

  Py_INCREF(Py_None);
  return Py_None;

}


static PyObject *Metaball_getMetaz(BPy_Metaball *self,PyObject*args)
{	
  MetaElem*ptr = self->metaball->elems.first;
  int num;
  int i = 0;
  if (!PyArg_ParseTuple(args, "i", &num))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int argument"));
  if(!ptr) return (PyFloat_FromDouble(0));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  return (PyFloat_FromDouble(ptr->z));
}

static PyObject *Metaball_setMetaz(BPy_Metaball *self,PyObject*args)
{	
  int num, i = 0;
  MetaElem*ptr = self->metaball->elems.first;
  float val;
  if (!PyArg_ParseTuple(args, "if", &num,&val))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int float args"));
  if(!ptr)  return (EXPP_ReturnPyObjError (PyExc_TypeError, "No MetaElem"));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  ptr->z = val;

  Py_INCREF(Py_None);
  return Py_None;

}


static PyObject *Metaball_getMetas(BPy_Metaball *self,PyObject*args)
{	
  MetaElem*ptr = self->metaball->elems.first;
  int num;
  int i = 0;
  if (!PyArg_ParseTuple(args, "i", &num))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int argument"));
  if(!ptr) return (PyFloat_FromDouble(0));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  return (PyFloat_FromDouble(ptr->s));
}

static PyObject *Metaball_setMetas(BPy_Metaball *self,PyObject*args)
{	
  int num, i = 0;
  MetaElem*ptr = self->metaball->elems.first;
  float val;
  if (!PyArg_ParseTuple(args, "if", &num,&val))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int float args"));
  if(!ptr)  return (EXPP_ReturnPyObjError (PyExc_TypeError, "No MetaElem"));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  ptr->s = val;

  Py_INCREF(Py_None);
  return Py_None;

}






static PyObject *Metaball_getMetalen(BPy_Metaball *self,PyObject*args)
{	
  int num;
  int i = 0;
	MetaElem *ptr;

  if (!PyArg_ParseTuple(args, "i", &num))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int argument"));
  ptr = self->metaball->elems.first;
  if(!ptr) return (PyFloat_FromDouble(0));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  return (PyFloat_FromDouble(ptr->len));
}

static PyObject *Metaball_setMetalen(BPy_Metaball *self,PyObject*args)
{	
  int num, i = 0;
  float val;
	MetaElem *ptr;

  if (!PyArg_ParseTuple(args, "if", &num,&val))
    return (EXPP_ReturnPyObjError (PyExc_TypeError, "expected int float args"));
  ptr = self->metaball->elems.first;
  if(!ptr)  return (EXPP_ReturnPyObjError (PyExc_TypeError, "No MetaElem"));
  for(i = 0;i<num;i++){ptr = ptr->next;}
  ptr->len = val;

  Py_INCREF(Py_None);
  return Py_None;
}



/*****************************************************************************/
/* Function:    MetaballDeAlloc                                              */
/* Description: This is a callback function for the BPy_Metaball type. It is   */
/*              the destructor function.                                     */
/*****************************************************************************/
static void MetaballDeAlloc (BPy_Metaball *self)
{
  PyObject_DEL (self);
}


/*****************************************************************************/
/* Function:    MetaelemDeAlloc                                              */
/* Description: This is a callback function for the BPy_Metaelem type. It is   */
/*              the destructor function.                                     */
/*****************************************************************************/
static void MetaelemDeAlloc (BPy_Metaelem *self)
{
  PyObject_DEL (self);
}




/*****************************************************************************/
/* Function:    MetaballGetAttr                                              */
/* Description: This is a callback function for the BPy_Metaball type. It is   */
/*              the function that accesses BPy_Metaball "member variables" and */
/*              methods.                                                     */
/*****************************************************************************/
static PyObject *MetaballGetAttr (BPy_Metaball *self, char *name)
{

if (strcmp (name, "name") == 0)return  Metaball_getName (self);
if (strcmp (name, "rot") == 0)return  Metaball_getrot (self);
if (strcmp (name, "loc") == 0)return  Metaball_getloc (self);
if (strcmp (name, "size") == 0)return  Metaball_getsize (self);
  return Py_FindMethod(BPy_Metaball_methods, (PyObject *)self, name);
}



/*******************************************************************************/
/* Function:    MetaballSetAttr                                                */
/* Description: This is a callback function for the BPy_Metaball type. It is the */
/*              function that sets Metaball Data attributes (member variables).*/
/*******************************************************************************/
static int MetaballSetAttr (BPy_Metaball *self, char *name, PyObject *value)
{
  PyObject *valtuple  = Py_BuildValue("(O)", value);

  if (!valtuple) 
    return EXPP_ReturnIntError(PyExc_MemoryError,
															 "MetaballSetAttr: couldn't create PyTuple");

  if (strcmp (name, "name") == 0) 
		{
			Metaball_setName (self, valtuple);
			return 0;
		}

  if (strcmp (name, "rot") == 0)
		{
			Metaball_setrot (self, valtuple);
			return 0;
		}
  if (strcmp (name, "loc") == 0)
		{
			Metaball_setloc (self, valtuple);
			return 0;
		}
 
  if (strcmp (name, "size") == 0)
		{
			Metaball_setsize (self, valtuple);
			return 0;
		}
  return (EXPP_ReturnIntError (PyExc_KeyError,"attribute not found"));
}








static PyObject *Metaelem_getdims(BPy_Metaelem *self)
{
  PyObject* l = PyList_New(0);
  PyList_Append( l, PyFloat_FromDouble(self->metaelem->expx));
  PyList_Append( l, PyFloat_FromDouble(self->metaelem->expy));
  PyList_Append( l, PyFloat_FromDouble(self->metaelem->expz));
  return l;
}


static PyObject *Metaelem_setdims(BPy_Metaelem *self,PyObject*args)
{

	PyObject *listargs=0;
  if (!PyArg_ParseTuple(args, "O", &listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
  if (!PyList_Check(listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
	self->metaelem->expx = PyFloat_AsDouble(PyList_GetItem(listargs,0));
	self->metaelem->expy = PyFloat_AsDouble(PyList_GetItem(listargs,1));
	self->metaelem->expz = PyFloat_AsDouble(PyList_GetItem(listargs,2));
  Py_INCREF(Py_None);
  return Py_None;
}



static PyObject *Metaelem_getcoords(BPy_Metaelem *self)
{
  PyObject* l = PyList_New(0);
  PyList_Append( l, PyFloat_FromDouble(self->metaelem->x));
  PyList_Append( l, PyFloat_FromDouble(self->metaelem->y));
  PyList_Append( l, PyFloat_FromDouble(self->metaelem->z));
  return l;
}


static PyObject *Metaelem_setcoords(BPy_Metaelem *self,PyObject*args)
{

	PyObject *listargs=0;
  if (!PyArg_ParseTuple(args, "O", &listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
  if (!PyList_Check(listargs))
    return (EXPP_ReturnPyObjError(PyExc_TypeError,"expected a list"));
	self->metaelem->x = PyFloat_AsDouble(PyList_GetItem(listargs,0));
	self->metaelem->y = PyFloat_AsDouble(PyList_GetItem(listargs,1));
	self->metaelem->z = PyFloat_AsDouble(PyList_GetItem(listargs,2));
  Py_INCREF(Py_None);
  return Py_None;
}


/*****************************************************************************/
/* Function:    MetaelemGetAttr                                              */
/* Description: This is a callback function for the BPy_Metaelem type. It is   */
/*              the function that accesses BPy_Metaelem "member variables" and */
/*              methods.                                                     */
/*****************************************************************************/
static PyObject *MetaelemGetAttr (BPy_Metaelem *self, char *name)
{

if (!strcmp (name, "dims") )return  Metaelem_getdims (self);
if (!strcmp (name, "coords") )return  Metaelem_getcoords (self);
if (!strcmp (name, "rad") )return  PyFloat_FromDouble(self->metaelem->rad);
if (!strcmp (name, "stif") )return  PyFloat_FromDouble(self->metaelem->s);
  return Py_FindMethod(BPy_Metaelem_methods, (PyObject *)self, name);
}



/*******************************************************************************/
/* Function:    MetaelemSetAttr                                                */
/* Description: This is a callback function for the BPy_Metaelem type. It is the */
/*              function that sets Metaelem Data attributes (member variables).*/
/*******************************************************************************/
static int MetaelemSetAttr (BPy_Metaelem *self, char *name, PyObject *value)
{
 
  if (!strcmp (name, "coords")) 
		{ 
PyObject *valtuple  = Py_BuildValue("(O)", value);
  if (!valtuple) 
		return EXPP_ReturnIntError(PyExc_MemoryError,"MetaelemSetAttr: couldn't create PyTuple");
			Metaelem_setcoords (self, valtuple);
			return 0;
		}
  if (!strcmp (name, "dims")) 
		{ 
PyObject *valtuple  = Py_BuildValue("(O)", value);
  if (!valtuple) 
		return EXPP_ReturnIntError(PyExc_MemoryError,"MetaelemSetAttr: couldn't create PyTuple");
			Metaelem_setdims (self, valtuple);
			return 0;
		}
  if (!strcmp (name, "rad")) 
		{
			self->metaelem->rad = PyFloat_AsDouble(value);
			return 0;
		}
  if (!strcmp (name, "stif")) 
		{
			self->metaelem->s = PyFloat_AsDouble(value);
			return 0;
		}
  return (EXPP_ReturnIntError (PyExc_KeyError,"attribute not found"));
}

/*****************************************************************************/
/* Function:    MetaballRepr                                                  */
/* Description: This is a callback function for the BPy_Metaball type. It       */
/*              builds a meaninful string to represent metaball objects.      */
/*****************************************************************************/
static PyObject *MetaballRepr (BPy_Metaball *self)
{
  return PyString_FromFormat("[Metaball \"%s\"]", self->metaball->id.name+2);
}


/*****************************************************************************/
/* Function:    MetaelemRepr                                                  */
/* Description: This is a callback function for the BPy_Metaelem type. It       */
/*              builds a meaninful string to represent metaelem objects.      */
/*****************************************************************************/
static PyObject *MetaelemRepr (BPy_Metaelem *self)
{
  return PyString_FromString("Metaelem");
}