blender/source/gameengine/Ketsji/KX_PyConstraintBinding.cpp

/**
 * $Id$
 *
 * ***** 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.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */
#include "KX_PyConstraintBinding.h"
#include "PHY_IPhysicsEnvironment.h"
#include "KX_ConstraintWrapper.h"
#include "KX_PhysicsObjectWrapper.h"
#include "PHY_IPhysicsController.h"


// nasty glob variable to connect scripting language
// if there is a better way (without global), please do so!
static PHY_IPhysicsEnvironment* g_physics_env = NULL;

static char PhysicsConstraints_module_documentation[] =
"This is the Python API for the Physics Constraints";


static char gPySetGravity__doc__[] = "setGravity(float x,float y,float z)";
static char gPyCreateConstraint__doc__[] = "createConstraint(ob1,ob2,float restLength,float restitution,float damping)";
static char gPyRemoveConstraint__doc__[] = "removeConstraint(constraint id)";

static PyObject* gPySetGravity(PyObject* self,
										 PyObject* args, 
										 PyObject* kwds)
{
	float x,y,z;
	int len = PyTuple_Size(args);
	if ((len == 3) && PyArg_ParseTuple(args,"fff",&x,&y,&z))
	{
		if (g_physics_env)
			g_physics_env->setGravity(x,y,z);
	}
	Py_INCREF(Py_None); return Py_None;
}




static PyObject* gPyCreateConstraint(PyObject* self,
										 PyObject* args, 
										 PyObject* kwds)
{
	int physicsid=0,physicsid2 = 0,constrainttype=0,extrainfo=0;
	int len = PyTuple_Size(args);
	int success = 1;
	float pivotX=1,pivotY=1,pivotZ=1,axisX=0,axisY=0,axisZ=1;
	if (len == 3)
	{
		success = PyArg_ParseTuple(args,"iii",&physicsid,&physicsid2,&constrainttype);
	}
	else
	if (len ==6)
	{
		success = PyArg_ParseTuple(args,"iiifff",&physicsid,&physicsid2,&constrainttype,
			&pivotX,&pivotY,&pivotZ);
	}
	else if (len == 9)
	{
		success = PyArg_ParseTuple(args,"iiiffffff",&physicsid,&physicsid2,&constrainttype,
			&pivotX,&pivotY,&pivotZ,&axisX,&axisY,&axisZ);
	}
	else if (len==4)
	{
		success = PyArg_ParseTuple(args,"iiii",&physicsid,&physicsid2,&constrainttype,&extrainfo);
		pivotX=extrainfo;
	}
	
	if (success)
	{
		if (g_physics_env)
		{
			
			PHY_IPhysicsController* physctrl = (PHY_IPhysicsController*) physicsid;
			PHY_IPhysicsController* physctrl2 = (PHY_IPhysicsController*) physicsid2;
			if (physctrl) //TODO:check for existance of this pointer!
			{
				int constraintid = g_physics_env->createConstraint(physctrl,physctrl2,(enum PHY_ConstraintType)constrainttype,pivotX,pivotY,pivotZ,axisX,axisY,axisZ);
				
				KX_ConstraintWrapper* wrap = new KX_ConstraintWrapper((enum PHY_ConstraintType)constrainttype,constraintid,g_physics_env);
				

				return wrap;
			}
			
			
		}
	}

	Py_INCREF(Py_None); return Py_None;
}


static PyObject* gPyRemoveConstraint(PyObject* self,
										 PyObject* args, 
										 PyObject* kwds)
{
	int constraintid;
	
	int len = PyTuple_Size(args);
	if (PyArg_ParseTuple(args,"i",&constraintid))
	{
		if (g_physics_env)
		{
			g_physics_env->removeConstraint(constraintid);
		}
	}
	Py_INCREF(Py_None); return Py_None;
}





static struct PyMethodDef physicsconstraints_methods[] = {
  {"setGravity",(PyCFunction) gPySetGravity,
   METH_VARARGS, gPySetGravity__doc__},
   
  {"createConstraint",(PyCFunction) gPyCreateConstraint,
   METH_VARARGS, gPyCreateConstraint__doc__},
  {"removeConstraint",(PyCFunction) gPyRemoveConstraint,
   METH_VARARGS, gPyRemoveConstraint__doc__},

   //sentinel
  { NULL, (PyCFunction) NULL, 0, NULL }
};



PyObject*	initPythonConstraintBinding()
{

  PyObject* ErrorObject;
  PyObject* m;
  PyObject* d;

  m = Py_InitModule4("PhysicsConstraints", physicsconstraints_methods,
		     PhysicsConstraints_module_documentation,
		     (PyObject*)NULL,PYTHON_API_VERSION);

  // Add some symbolic constants to the module
  d = PyModule_GetDict(m);
  ErrorObject = PyString_FromString("PhysicsConstraints.error");
  PyDict_SetItemString(d, "error", ErrorObject);

  // XXXX Add constants here

  // Check for errors
  if (PyErr_Occurred())
    {
      Py_FatalError("can't initialize module PhysicsConstraints");
    }

  return d;
}


void	KX_RemovePythonConstraintBinding()
{
}

void	PHY_SetActiveEnvironment(class	PHY_IPhysicsEnvironment* env)
{
	g_physics_env = env;
}