blender/source/gameengine/Ketsji/KX_GameObject.cpp

/**
 * $Id$
 *
 * ***** BEGIN GPL 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.
 *
 * 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 LICENSE BLOCK *****
 * Game object wrapper
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#if defined(_WIN64)
typedef unsigned __int64 uint_ptr;
#else
typedef unsigned long uint_ptr;
#endif

#ifdef WIN32
// This warning tells us about truncation of __long__ stl-generated names.
// It can occasionally cause DevStudio to have internal compiler warnings.
#pragma warning( disable : 4786 )     
#endif


#define KX_INERTIA_INFINITE 10000
#include "RAS_IPolygonMaterial.h"
#include "KX_BlenderMaterial.h"
#include "KX_GameObject.h"
#include "RAS_MeshObject.h"
#include "KX_MeshProxy.h"
#include <stdio.h> // printf
#include "SG_Controller.h"
#include "KX_IPhysicsController.h"
#include "SG_Node.h"
#include "SG_Controller.h"
#include "KX_ClientObjectInfo.h"
#include "RAS_BucketManager.h"
#include "KX_RayCast.h"
#include "KX_PythonInit.h"
#include "KX_PyMath.h"
#include "SCA_IActuator.h"
#include "SCA_ISensor.h"

// This file defines relationships between parents and children
// in the game engine.

#include "KX_SG_NodeRelationships.h"

KX_GameObject::KX_GameObject(
	void* sgReplicationInfo,
	SG_Callbacks callbacks,
	PyTypeObject* T
) : 
	SCA_IObject(T),
	m_bDyna(false),
	m_layer(0),
	m_pBlenderObject(NULL),
	m_bSuspendDynamics(false),
	m_bUseObjectColor(false),
	m_bIsNegativeScaling(false),
	m_bVisible(true),
	m_pPhysicsController1(NULL),
	m_pPhysicsEnvironment(NULL),
	m_pHitObject(NULL),
	m_isDeformable(false)
{
	m_ignore_activity_culling = false;
	m_pClient_info = new KX_ClientObjectInfo(this, KX_ClientObjectInfo::ACTOR);
	m_pSGNode = new SG_Node(this,sgReplicationInfo,callbacks);

	// define the relationship between this node and it's parent.
	
	KX_NormalParentRelation * parent_relation = 
		KX_NormalParentRelation::New();
	m_pSGNode->SetParentRelation(parent_relation);
};


KX_GameObject::~KX_GameObject()
{
	// is this delete somewhere ?
	//if (m_sumoObj)
	//	delete m_sumoObj;
	delete m_pClient_info;
	//if (m_pSGNode)
	//	delete m_pSGNode;
	if (m_pSGNode)
	{
		// must go through controllers and make sure they will not use us anymore
		// This is important for KX_BulletPhysicsControllers that unregister themselves
		// from the object when they are deleted.
		SGControllerList::iterator contit;
		SGControllerList& controllers = m_pSGNode->GetSGControllerList();
		for (contit = controllers.begin();contit!=controllers.end();++contit)
		{
			(*contit)->ClearObject();
		}
		m_pSGNode->SetSGClientObject(NULL);
	}
}



CValue* KX_GameObject::	Calc(VALUE_OPERATOR op, CValue *val) 
{
	return NULL;
}



CValue* KX_GameObject::CalcFinal(VALUE_DATA_TYPE dtype, VALUE_OPERATOR op, CValue *val)
{
	return NULL;
}



const STR_String & KX_GameObject::GetText()
{
	return m_text;
}



float KX_GameObject::GetNumber()
{
	return 0;
}



STR_String KX_GameObject::GetName()
{
	return m_name;
}



void KX_GameObject::SetName(STR_String name)
{
	m_name = name;

};								// Set the name of the value



void KX_GameObject::ReplicaSetName(STR_String name)
{
}






KX_IPhysicsController* KX_GameObject::GetPhysicsController()
{
	return m_pPhysicsController1;
}





KX_GameObject* KX_GameObject::GetParent()
{
	KX_GameObject* result = NULL;
	SG_Node* node = m_pSGNode;
	
	while (node && !result)
	{
		node = node->GetSGParent();
		if (node)
			result = (KX_GameObject*)node->GetSGClientObject();
	}
	
	if (result)
		result->AddRef();

	return result;
	
}

void KX_GameObject::SetParent(KX_Scene *scene, KX_GameObject* obj)
{
	if (obj && GetSGNode()->GetSGParent() != obj->GetSGNode())
	{
		// Make sure the objects have some scale
		MT_Vector3 scale1 = NodeGetWorldScaling();
		MT_Vector3 scale2 = obj->NodeGetWorldScaling();
		if (fabs(scale2[0]) < FLT_EPSILON || 
			fabs(scale2[1]) < FLT_EPSILON || 
			fabs(scale2[2]) < FLT_EPSILON || 
			fabs(scale1[0]) < FLT_EPSILON || 
			fabs(scale1[1]) < FLT_EPSILON || 
			fabs(scale1[2]) < FLT_EPSILON) { return; }

		// Remove us from our old parent and set our new parent
		RemoveParent(scene);
		obj->GetSGNode()->AddChild(GetSGNode());

		if (m_pPhysicsController1) 
		{
			m_pPhysicsController1->SuspendDynamics(true);
		}
		// Set us to our new scale, position, and orientation
		scale1[0] = scale1[0]/scale2[0];
		scale1[1] = scale1[1]/scale2[1];
		scale1[2] = scale1[2]/scale2[2];
		MT_Matrix3x3 invori = obj->NodeGetWorldOrientation().inverse();
		MT_Vector3 newpos = invori*(NodeGetWorldPosition()-obj->NodeGetWorldPosition())*scale1;

		NodeSetLocalScale(scale1);
		NodeSetLocalPosition(MT_Point3(newpos[0],newpos[1],newpos[2]));
		NodeSetLocalOrientation(invori*NodeGetWorldOrientation());
		NodeUpdateGS(0.f,true);
		// object will now be a child, it must be removed from the parent list
		CListValue* rootlist = scene->GetRootParentList();
		if (rootlist->RemoveValue(this))
			// the object was in parent list, decrement ref count as it's now removed
			Release();
	}
}

void KX_GameObject::RemoveParent(KX_Scene *scene)
{
	if (GetSGNode()->GetSGParent())
	{
		// Set us to the right spot 
		GetSGNode()->SetLocalScale(GetSGNode()->GetWorldScaling());
		GetSGNode()->SetLocalOrientation(GetSGNode()->GetWorldOrientation());
		GetSGNode()->SetLocalPosition(GetSGNode()->GetWorldPosition());

		// Remove us from our parent
		GetSGNode()->DisconnectFromParent();
		NodeUpdateGS(0.f,true);
		// the object is now a root object, add it to the parentlist
		CListValue* rootlist = scene->GetRootParentList();
		if (!rootlist->SearchValue(this))
			// object was not in root list, add it now and increment ref count
			rootlist->Add(AddRef());
		if (m_pPhysicsController1) 
		{
			m_pPhysicsController1->RestoreDynamics();
		}
	}
}

void KX_GameObject::ProcessReplica(KX_GameObject* replica)
{
	replica->m_pPhysicsController1 = NULL;
	replica->m_pSGNode = NULL;
	replica->m_pClient_info = new KX_ClientObjectInfo(*m_pClient_info);
	replica->m_pClient_info->m_gameobject = replica;
	replica->m_state = 0;
}



CValue* KX_GameObject::GetReplica()
{
	KX_GameObject* replica = new KX_GameObject(*this);
	
	// this will copy properties and so on...
	CValue::AddDataToReplica(replica);
	ProcessReplica(replica);
	
	return replica;
}



void KX_GameObject::ApplyForce(const MT_Vector3& force,bool local)
{
	if (m_pPhysicsController1)
		m_pPhysicsController1->ApplyForce(force,local);
}



void KX_GameObject::ApplyTorque(const MT_Vector3& torque,bool local)
{
	if (m_pPhysicsController1)
		m_pPhysicsController1->ApplyTorque(torque,local);
}



void KX_GameObject::ApplyMovement(const MT_Vector3& dloc,bool local)
{
	if (m_pPhysicsController1) // (IsDynamic())
	{
		m_pPhysicsController1->RelativeTranslate(dloc,local);
	}
	GetSGNode()->RelativeTranslate(dloc,GetSGNode()->GetSGParent(),local);
}



void KX_GameObject::ApplyRotation(const MT_Vector3& drot,bool local)
{
	MT_Matrix3x3 rotmat(drot);

	GetSGNode()->RelativeRotate(rotmat,local);

	if (m_pPhysicsController1) { // (IsDynamic())
		m_pPhysicsController1->RelativeRotate(rotmat,local); 
	}
}



/**
GetOpenGL Matrix, returns an OpenGL 'compatible' matrix
*/
double*	KX_GameObject::GetOpenGLMatrix()
{
	// todo: optimize and only update if necessary
	double* fl = m_OpenGL_4x4Matrix.getPointer();
	MT_Transform trans;
	
	trans.setOrigin(GetSGNode()->GetWorldPosition());
	trans.setBasis(GetSGNode()->GetWorldOrientation());
	
	MT_Vector3 scaling = GetSGNode()->GetWorldScaling();
	m_bIsNegativeScaling = ((scaling[0] < 0.0) ^ (scaling[1] < 0.0) ^ (scaling[2] < 0.0)) ? true : false;
	trans.scale(scaling[0], scaling[1], scaling[2]);
	trans.getValue(fl);

	return fl;
}



void KX_GameObject::Bucketize()
{
	double* fl = GetOpenGLMatrix();

	for (size_t i=0;i<m_meshes.size();i++)
		m_meshes[i]->Bucketize(fl, this, m_bUseObjectColor, m_objectColor);
}



void KX_GameObject::RemoveMeshes()
{
	double* fl = GetOpenGLMatrix();

	for (size_t i=0;i<m_meshes.size();i++)
		m_meshes[i]->RemoveFromBuckets(fl, this);

	//note: meshes can be shared, and are deleted by KX_BlenderSceneConverter

	m_meshes.clear();
}



void KX_GameObject::UpdateNonDynas()
{
	if (m_pPhysicsController1)
	{
		m_pPhysicsController1->SetSumoTransform(true);
	}
}



void KX_GameObject::UpdateTransform()
{
	if (m_pPhysicsController1)
		m_pPhysicsController1->SetSumoTransform(false);
}

void KX_GameObject::UpdateTransformFunc(SG_IObject* node, void* gameobj, void* scene)
{
	((KX_GameObject*)gameobj)->UpdateTransform();
}


void KX_GameObject::SetDebugColor(unsigned int bgra)
{
	for (size_t i=0;i<m_meshes.size();i++)
		m_meshes[i]->DebugColor(bgra);	
}



void KX_GameObject::ResetDebugColor()
{
	SetDebugColor(0xff000000);
}

void KX_GameObject::InitIPO(bool ipo_as_force,
							bool ipo_add,
							bool ipo_local)
{
	SGControllerList::iterator it = GetSGNode()->GetSGControllerList().begin();

	while (it != GetSGNode()->GetSGControllerList().end()) {
		(*it)->SetOption(SG_Controller::SG_CONTR_IPO_RESET, true);
		(*it)->SetOption(SG_Controller::SG_CONTR_IPO_IPO_AS_FORCE, ipo_as_force);
		(*it)->SetOption(SG_Controller::SG_CONTR_IPO_IPO_ADD, ipo_add);
		(*it)->SetOption(SG_Controller::SG_CONTR_IPO_LOCAL, ipo_local);
		it++;
	}
} 

void KX_GameObject::UpdateIPO(float curframetime,
							  bool recurse) 
{
	// just the 'normal' update procedure.
	GetSGNode()->SetSimulatedTime(curframetime,recurse);
	GetSGNode()->UpdateWorldData(curframetime);
	UpdateTransform();
}

// IPO update
void 
KX_GameObject::UpdateMaterialData(
		dword matname_hash,
		MT_Vector4 rgba,
		MT_Vector3 specrgb,
		MT_Scalar hard,
		MT_Scalar spec,
		MT_Scalar ref,
		MT_Scalar emit,
		MT_Scalar alpha

	)
{
	int mesh = 0;

	if (((unsigned int)mesh < m_meshes.size()) && mesh >= 0) {
		RAS_MaterialBucket::Set::iterator mit = m_meshes[mesh]->GetFirstMaterial();
		for(; mit != m_meshes[mesh]->GetLastMaterial(); ++mit)
		{
			RAS_IPolyMaterial* poly = (*mit)->GetPolyMaterial();
			if(poly->GetFlag() & RAS_BLENDERMAT)
			{
				KX_BlenderMaterial *m =  static_cast<KX_BlenderMaterial*>(poly);
				
				if (matname_hash == NULL)
				{
					m->UpdateIPO(rgba, specrgb,hard,spec,ref,emit, alpha);
					// if mesh has only one material attached to it then use original hack with no need to edit vertices (better performance)
					if(!(poly->GetFlag() & RAS_BLENDERGLSL))
						SetObjectColor(rgba);
				}
				else
				{
					if (matname_hash == poly->GetMaterialNameHash())
					{
						m->UpdateIPO(rgba, specrgb,hard,spec,ref,emit, alpha);
						m_meshes[mesh]->SetVertexColor(poly,rgba);
						
						// no break here, because one blender material can be split into several game engine materials
						// (e.g. one uvsphere material is split into one material at poles with ras_mode TRIANGLE and one material for the body
						// if here was a break then would miss some vertices if material was split
					}
				}
			}
		}
	}
}
bool
KX_GameObject::GetVisible(
	void
	)
{
	return m_bVisible;
}

void
KX_GameObject::SetVisible(
	bool v
	)
{
	m_bVisible = v;
}

void
KX_GameObject::SetLayer(
	int l
	)
{
	m_layer = l;
}

int
KX_GameObject::GetLayer(
	void
	)
{
	return m_layer;
}

// used by Python, and the actuatorshould _not_ be misused by the
// scene!
void 
KX_GameObject::MarkVisible(
	bool visible
	)
{
	/* If explicit visibility settings are used, this is
	 * determined on this level. Maybe change this to mesh level
	 * later on? */
	
	double* fl = GetOpenGLMatrixPtr()->getPointer();
	for (size_t i=0;i<m_meshes.size();i++)
	{
		m_meshes[i]->MarkVisible(fl,this,visible,m_bUseObjectColor,m_objectColor);
	}
}


// Always use the flag?
void 
KX_GameObject::MarkVisible(
	void
	)
{
	double* fl = GetOpenGLMatrixPtr()->getPointer();
	for (size_t i=0;i<m_meshes.size();i++)
	{
		m_meshes[i]->MarkVisible(fl,
					 this,
					 m_bVisible,
					 m_bUseObjectColor,
					 m_objectColor
			);
	}
}


void KX_GameObject::addLinearVelocity(const MT_Vector3& lin_vel,bool local)
{
	if (m_pPhysicsController1)
		m_pPhysicsController1->SetLinearVelocity(lin_vel + m_pPhysicsController1->GetLinearVelocity(),local);
}



void KX_GameObject::setLinearVelocity(const MT_Vector3& lin_vel,bool local)
{
	if (m_pPhysicsController1)
		m_pPhysicsController1->SetLinearVelocity(lin_vel,local);
}



void KX_GameObject::setAngularVelocity(const MT_Vector3& ang_vel,bool local)
{
	if (m_pPhysicsController1)
		m_pPhysicsController1->SetAngularVelocity(ang_vel,local);
}

void KX_GameObject::ResolveCombinedVelocities(
	const MT_Vector3 & lin_vel,
	const MT_Vector3 & ang_vel,
	bool lin_vel_local,
	bool ang_vel_local
){
	if (m_pPhysicsController1)
	{

		MT_Vector3 lv = lin_vel_local ? NodeGetWorldOrientation() * lin_vel : lin_vel;
		MT_Vector3 av = ang_vel_local ? NodeGetWorldOrientation() * ang_vel : ang_vel;
		m_pPhysicsController1->resolveCombinedVelocities(
			lv.x(),lv.y(),lv.z(),av.x(),av.y(),av.z());
	}
}


void KX_GameObject::SetObjectColor(const MT_Vector4& rgbavec)
{
	m_bUseObjectColor = true;
	m_objectColor = rgbavec;
}

void KX_GameObject::AlignAxisToVect(const MT_Vector3& dir, int axis, float fac)
{
	MT_Matrix3x3 orimat;
	MT_Vector3 vect,ori,z,x,y;
	MT_Scalar len;

	vect = dir;
	len = vect.length();
	if (MT_fuzzyZero(len))
	{
		cout << "alignAxisToVect() Error: Null vector!\n";
		return;
	}
	
	if (fac<=0.0) {
		return;
	}
	
	// normalize
	vect /= len;
	orimat = GetSGNode()->GetWorldOrientation();
	switch (axis)
	{	
		case 0: //x axis
			ori = MT_Vector3(orimat[0][2], orimat[1][2], orimat[2][2]); //pivot axis
			if (MT_abs(vect.dot(ori)) > 1.0-3.0*MT_EPSILON) //is the vector paralell to the pivot?
				ori = MT_Vector3(orimat[0][1], orimat[1][1], orimat[2][1]); //change the pivot!
			if (fac == 1.0) {
				x = vect;
			} else {
				x = (vect * fac) + ((orimat * MT_Vector3(1.0, 0.0, 0.0)) * (1-fac));
				len = x.length();
				if (MT_fuzzyZero(len)) x = vect;
				else x /= len;
			}
			y = ori.cross(x);
			z = x.cross(y);
			break;
		case 1: //y axis
			ori = MT_Vector3(orimat[0][0], orimat[1][0], orimat[2][0]);
			if (MT_abs(vect.dot(ori)) > 1.0-3.0*MT_EPSILON)
				ori = MT_Vector3(orimat[0][2], orimat[1][2], orimat[2][2]);
			if (fac == 1.0) {
				y = vect;
			} else {
				y = (vect * fac) + ((orimat * MT_Vector3(0.0, 1.0, 0.0)) * (1-fac));
				len = y.length();
				if (MT_fuzzyZero(len)) y = vect;
				else y /= len;
			}
			z = ori.cross(y);
			x = y.cross(z);
			break;
		case 2: //z axis
			ori = MT_Vector3(orimat[0][1], orimat[1][1], orimat[2][1]);
			if (MT_abs(vect.dot(ori)) > 1.0-3.0*MT_EPSILON)
				ori = MT_Vector3(orimat[0][0], orimat[1][0], orimat[2][0]);
			if (fac == 1.0) {
				z = vect;
			} else {
				z = (vect * fac) + ((orimat * MT_Vector3(0.0, 0.0, 1.0)) * (1-fac));
				len = z.length();
				if (MT_fuzzyZero(len)) z = vect;
				else z /= len;
			}
			x = ori.cross(z);
			y = z.cross(x);
			break;
		default: //wrong input?
			cout << "alignAxisToVect(): Wrong axis '" << axis <<"'\n";
			return;
	}
	x.normalize(); //normalize the vectors
	y.normalize();
	z.normalize();
	orimat = MT_Matrix3x3(	x[0],y[0],z[0],
							x[1],y[1],z[1],
							x[2],y[2],z[2]);
	if (GetSGNode()->GetSGParent() != NULL)
	{
		// the object is a child, adapt its local orientation so that 
		// the global orientation is aligned as we want.
		MT_Matrix3x3 invori = GetSGNode()->GetSGParent()->GetWorldOrientation().inverse();
		NodeSetLocalOrientation(invori*orimat);
	}
	else
		NodeSetLocalOrientation(orimat);
}

MT_Scalar KX_GameObject::GetMass()
{
	if (m_pPhysicsController1)
	{
		return m_pPhysicsController1->GetMass();
	}
	return 0.0;
}

MT_Vector3 KX_GameObject::GetLinearVelocity(bool local)
{
	MT_Vector3 velocity(0.0,0.0,0.0), locvel;
	MT_Matrix3x3 ori;
	if (m_pPhysicsController1)
	{
		velocity = m_pPhysicsController1->GetLinearVelocity();
		
		if (local)
		{
			ori = GetSGNode()->GetWorldOrientation();
			
			locvel = velocity * ori;
			return locvel;
		}
	}
	return velocity;	
}

MT_Vector3 KX_GameObject::GetAngularVelocity(bool local)
{
	MT_Vector3 velocity(0.0,0.0,0.0), locvel;
	MT_Matrix3x3 ori;
	if (m_pPhysicsController1)
	{
		velocity = m_pPhysicsController1->GetAngularVelocity();
		
		if (local)
		{
			ori = GetSGNode()->GetWorldOrientation();
			
			locvel = velocity * ori;
			return locvel;
		}
	}
	return velocity;	
}



// scenegraph node stuff

void KX_GameObject::NodeSetLocalPosition(const MT_Point3& trans)
{
	if (m_pPhysicsController1 && (!GetSGNode() || !GetSGNode()->GetSGParent()))
	{
		// don't update physic controller if the object is a child:
		// 1) the transformation will not be right
		// 2) in this case, the physic controller is necessarily a static object
		//    that is updated from the normal kinematic synchronization
		m_pPhysicsController1->setPosition(trans);
	}

	if (GetSGNode())
		GetSGNode()->SetLocalPosition(trans);
}



void KX_GameObject::NodeSetLocalOrientation(const MT_Matrix3x3& rot)
{
	if (m_pPhysicsController1 && (!GetSGNode() || !GetSGNode()->GetSGParent()))
	{
		// see note above
		m_pPhysicsController1->setOrientation(rot);
	}
	if (GetSGNode())
		GetSGNode()->SetLocalOrientation(rot);
}



void KX_GameObject::NodeSetLocalScale(const MT_Vector3& scale)
{
	if (m_pPhysicsController1 && (!GetSGNode() || !GetSGNode()->GetSGParent()))
	{
		// see note above
		m_pPhysicsController1->setScaling(scale);
	}
	
	if (GetSGNode())
		GetSGNode()->SetLocalScale(scale);
}



void KX_GameObject::NodeSetRelativeScale(const MT_Vector3& scale)
{
	if (GetSGNode())
		GetSGNode()->RelativeScale(scale);
}

void KX_GameObject::NodeSetWorldPosition(const MT_Point3& trans)
{
	SG_Node* parent = m_pSGNode->GetSGParent();
	if (parent != NULL)
	{
		// Make sure the objects have some scale
		MT_Vector3 scale = parent->GetWorldScaling();
		if (fabs(scale[0]) < FLT_EPSILON || 
			fabs(scale[1]) < FLT_EPSILON || 
			fabs(scale[2]) < FLT_EPSILON)
		{ 
			return; 
		}
		scale[0] = 1.0/scale[0];
		scale[1] = 1.0/scale[1];
		scale[2] = 1.0/scale[2];
		MT_Matrix3x3 invori = parent->GetWorldOrientation().inverse();
		MT_Vector3 newpos = invori*(trans-parent->GetWorldPosition())*scale;
		NodeSetLocalPosition(MT_Point3(newpos[0],newpos[1],newpos[2]));
	}
	else 
	{
		NodeSetLocalPosition(trans);
	}
}


void KX_GameObject::NodeUpdateGS(double time,bool bInitiator)
{
	if (GetSGNode())
		GetSGNode()->UpdateWorldData(time);
}



const MT_Matrix3x3& KX_GameObject::NodeGetWorldOrientation() const
{
	return GetSGNode()->GetWorldOrientation();
}



const MT_Vector3& KX_GameObject::NodeGetWorldScaling() const
{
	return GetSGNode()->GetWorldScaling();
}



const MT_Point3& KX_GameObject::NodeGetWorldPosition() const
{
	return GetSGNode()->GetWorldPosition();
}

/* Suspend/ resume: for the dynamic behaviour, there is a simple
 * method. For the residual motion, there is not. I wonder what the
 * correct solution is for Sumo. Remove from the motion-update tree?
 *
 * So far, only switch the physics and logic.
 * */

void KX_GameObject::Resume(void)
{
	if (m_suspended) {
		SCA_IObject::Resume();
		GetPhysicsController()->RestoreDynamics();

		m_suspended = false;
	}
}

void KX_GameObject::Suspend()
{
	if ((!m_ignore_activity_culling) 
		&& (!m_suspended))  {
		SCA_IObject::Suspend();
		GetPhysicsController()->SuspendDynamics();
		m_suspended = true;
	}
}




/* ------- python stuff ---------------------------------------------------*/




PyMethodDef KX_GameObject::Methods[] = {
	{"getPosition", (PyCFunction) KX_GameObject::sPyGetPosition, METH_NOARGS},
	{"setPosition", (PyCFunction) KX_GameObject::sPySetPosition, METH_O},
	{"getLinearVelocity", (PyCFunction) KX_GameObject::sPyGetLinearVelocity, METH_VARARGS},
	{"setLinearVelocity", (PyCFunction) KX_GameObject::sPySetLinearVelocity, METH_VARARGS},
	{"getAngularVelocity", (PyCFunction) KX_GameObject::sPyGetAngularVelocity, METH_VARARGS},
	{"setAngularVelocity", (PyCFunction) KX_GameObject::sPySetAngularVelocity, METH_VARARGS},
	{"getVelocity", (PyCFunction) KX_GameObject::sPyGetVelocity, METH_VARARGS},
	{"getMass", (PyCFunction) KX_GameObject::sPyGetMass, METH_NOARGS},
	{"getReactionForce", (PyCFunction) KX_GameObject::sPyGetReactionForce, METH_NOARGS},
	{"getOrientation", (PyCFunction) KX_GameObject::sPyGetOrientation, METH_NOARGS},
	{"setOrientation", (PyCFunction) KX_GameObject::sPySetOrientation, METH_O},
	{"getVisible",(PyCFunction) KX_GameObject::sPyGetVisible, METH_NOARGS},
	{"setVisible",(PyCFunction) KX_GameObject::sPySetVisible, METH_O},
	{"getState",(PyCFunction) KX_GameObject::sPyGetState, METH_NOARGS},
	{"setState",(PyCFunction) KX_GameObject::sPySetState, METH_O},
	{"alignAxisToVect",(PyCFunction) KX_GameObject::sPyAlignAxisToVect, METH_VARARGS},
	{"getAxisVect",(PyCFunction) KX_GameObject::sPyGetAxisVect, METH_O},
	{"suspendDynamics", (PyCFunction)KX_GameObject::sPySuspendDynamics,METH_NOARGS},
	{"restoreDynamics", (PyCFunction)KX_GameObject::sPyRestoreDynamics,METH_NOARGS},
	{"enableRigidBody", (PyCFunction)KX_GameObject::sPyEnableRigidBody,METH_NOARGS},
	{"disableRigidBody", (PyCFunction)KX_GameObject::sPyDisableRigidBody,METH_NOARGS},
	{"applyImpulse", (PyCFunction) KX_GameObject::sPyApplyImpulse, METH_VARARGS},
	{"setCollisionMargin", (PyCFunction) KX_GameObject::sPySetCollisionMargin, METH_O},
	{"getParent", (PyCFunction)KX_GameObject::sPyGetParent,METH_NOARGS},
	{"setParent", (PyCFunction)KX_GameObject::sPySetParent,METH_O},
	{"removeParent", (PyCFunction)KX_GameObject::sPyRemoveParent,METH_NOARGS},
	{"getChildren", (PyCFunction)KX_GameObject::sPyGetChildren,METH_NOARGS},
	{"getChildrenRecursive", (PyCFunction)KX_GameObject::sPyGetChildrenRecursive,METH_NOARGS},
	{"getMesh", (PyCFunction)KX_GameObject::sPyGetMesh,METH_VARARGS},
	{"getPhysicsId", (PyCFunction)KX_GameObject::sPyGetPhysicsId,METH_NOARGS},
	{"getPropertyNames", (PyCFunction)KX_GameObject::sPyGetPropertyNames,METH_NOARGS},
	{"endObject",(PyCFunction) KX_GameObject::sPyEndObject, METH_NOARGS},
	KX_PYMETHODTABLE(KX_GameObject, rayCastTo),
	KX_PYMETHODTABLE(KX_GameObject, rayCast),
	KX_PYMETHODTABLE(KX_GameObject, getDistanceTo),
	KX_PYMETHODTABLE(KX_GameObject, getVectTo),
	{NULL,NULL} //Sentinel
};



/*
bool KX_GameObject::ConvertPythonVectorArgs(PyObject* args,
											MT_Vector3& pos,
											MT_Vector3& pos2)
{
	PyObject* pylist;
	PyObject* pylist2;
	bool error = (PyArg_ParseTuple(args,"OO",&pylist,&pylist2)) != 0;

	pos = ConvertPythonPylist(pylist);
	pos2 = ConvertPythonPylist(pylist2);
		
	return error;
}
*/

PyObject* KX_GameObject::PyEndObject(PyObject* self)
{

	KX_Scene *scene = PHY_GetActiveScene();
	scene->DelayedRemoveObject(this);
	
	Py_RETURN_NONE;

}


PyObject* KX_GameObject::PyGetPosition(PyObject* self)
{
	return PyObjectFrom(NodeGetWorldPosition());
}



PyTypeObject KX_GameObject::Type = {
	PyObject_HEAD_INIT(&PyType_Type)
		0,
		"KX_GameObject",
		sizeof(KX_GameObject),
		0,
		PyDestructor,
		0,
		__getattr,
		__setattr,
		0, //&MyPyCompare,
		__repr,
		0, //&cvalue_as_number,
		0,
		0,
		0,
		0
};



PyParentObject KX_GameObject::Parents[] = {
	&KX_GameObject::Type,
		&SCA_IObject::Type,
		&CValue::Type,
		NULL
};




PyObject* KX_GameObject::_getattr(const STR_String& attr)
{
	if (m_pPhysicsController1)
	{
		if (attr == "mass")
			return PyFloat_FromDouble(GetPhysicsController()->GetMass());
	}

	if (attr == "parent")
	{	
		KX_GameObject* parent = GetParent();
		if (parent)
		{
			parent->AddRef();
			return parent;
		}
		Py_RETURN_NONE;
	}

	if (attr == "visible")
		return PyInt_FromLong(m_bVisible);
	
	if (attr == "position")
		return PyObjectFrom(NodeGetWorldPosition());
	
	if (attr == "orientation")
		return PyObjectFrom(NodeGetWorldOrientation());
	
	if (attr == "scaling")
		return PyObjectFrom(NodeGetWorldScaling());
		
	if (attr == "name")
		return PyString_FromString(m_name.ReadPtr());
	if (attr == "timeOffset") {
		if (m_pSGNode->GetSGParent()->IsSlowParent()) {
			return PyFloat_FromDouble(static_cast<KX_SlowParentRelation *>(m_pSGNode->GetSGParent()->GetParentRelation())->GetTimeOffset());
		} else {
			return PyFloat_FromDouble(0.0);
		}
	}
	
	
	_getattr_up(SCA_IObject);
}

int KX_GameObject::_setattr(const STR_String& attr, PyObject *value)	// _setattr method
{
	if (attr == "mass")
		return 1;
	
	if (attr == "parent")
		return 1;
		
	if (PyInt_Check(value))
	{
		int val = PyInt_AsLong(value);
		if (attr == "visible")
		{
			SetVisible(val != 0);
			return 0;
		}
	}

	if (PyFloat_Check(value))
	{
		MT_Scalar val = PyFloat_AsDouble(value);
		if (attr == "timeOffset") {
			if (m_pSGNode->GetSGParent() && m_pSGNode->GetSGParent()->IsSlowParent()) {
				static_cast<KX_SlowParentRelation *>(m_pSGNode->GetSGParent()->GetParentRelation())->SetTimeOffset(val);
				return 0;
			} else {
				return 0;
			}		
		}
	}
	
	if (PySequence_Check(value))
	{
		if (attr == "orientation")
		{
			MT_Matrix3x3 rot;
			if (PyObject_IsMT_Matrix(value, 3))
			{
				if (PyMatTo(value, rot))
				{
					NodeSetLocalOrientation(rot);
					NodeUpdateGS(0.f,true);
					return 0;
				}
				return 1;
			}
			
			if (PySequence_Size(value) == 4)
			{
				MT_Quaternion qrot;
				if (PyVecTo(value, qrot))
				{
					rot.setRotation(qrot);
					NodeSetLocalOrientation(rot);
					NodeUpdateGS(0.f,true);
					return 0;
				}
				return 1;
			}
			
			if (PySequence_Size(value) == 3)
			{
				MT_Vector3 erot;
				if (PyVecTo(value, erot))
				{
					rot.setEuler(erot);
					NodeSetLocalOrientation(rot);
					NodeUpdateGS(0.f,true);
					return 0;
				}
				return 1;
			}
			
			return 1;
		}
		
		if (attr == "position")
		{
			MT_Point3 pos;
			if (PyVecTo(value, pos))
			{
				NodeSetLocalPosition(pos);
				NodeUpdateGS(0.f,true);
				return 0;
			}
			return 1;
		}
		
		if (attr == "scaling")
		{
			MT_Vector3 scale;
			if (PyVecTo(value, scale))
			{
				NodeSetLocalScale(scale);
				NodeUpdateGS(0.f,true);
				return 0;
			}
			return 1;
		}
	}
	
	if (PyString_Check(value))
	{
		if (attr == "name")
		{
			m_name = PyString_AsString(value);
			return 0;
		}
	}
	
	/* Need to have parent settable here too */
	
	return SCA_IObject::_setattr(attr, value);
}


PyObject* KX_GameObject::PyGetLinearVelocity(PyObject* self, PyObject* args)
{
	// only can get the velocity if we have a physics object connected to us...
	int local = 0;
	if (PyArg_ParseTuple(args,"|i",&local))
	{
		return PyObjectFrom(GetLinearVelocity((local!=0)));
	}
	else
	{
		return NULL;
	}
}

PyObject* KX_GameObject::PySetLinearVelocity(PyObject* self, PyObject* args)
{
	int local = 0;
	PyObject* pyvect;
	
	if (PyArg_ParseTuple(args,"O|i",&pyvect,&local)) {
		MT_Vector3 velocity;
		if (PyVecTo(pyvect, velocity)) {
			setLinearVelocity(velocity, (local!=0));
			Py_RETURN_NONE;
		}
	}
	return NULL;
}

PyObject* KX_GameObject::PyGetAngularVelocity(PyObject* self, PyObject* args)
{
	// only can get the velocity if we have a physics object connected to us...
	int local = 0;
	if (PyArg_ParseTuple(args,"|i",&local))
	{
		return PyObjectFrom(GetAngularVelocity((local!=0)));
	}
	else
	{
		return NULL;
	}
}

PyObject* KX_GameObject::PySetAngularVelocity(PyObject* self, PyObject* args)
{
	int local = 0;
	PyObject* pyvect;
	
	if (PyArg_ParseTuple(args,"O|i",&pyvect,&local)) {
		MT_Vector3 velocity;
		if (PyVecTo(pyvect, velocity)) {
			setAngularVelocity(velocity, (local!=0));
			Py_RETURN_NONE;
		}
	}
	return NULL;
}

PyObject* KX_GameObject::PySetVisible(PyObject* self, PyObject* value)
{
	int visible = PyInt_AsLong(value);
	
	if (visible==-1 && PyErr_Occurred()) {
		PyErr_SetString(PyExc_TypeError, "expected 0 or 1");
		return NULL;
	}
	
	MarkVisible(visible!=0);
	m_bVisible = (visible!=0);
	Py_RETURN_NONE;
	
}

PyObject* KX_GameObject::PyGetVisible(PyObject* self)
{
	return PyInt_FromLong(m_bVisible);	
}

PyObject* KX_GameObject::PyGetState(PyObject* self)
{
	int state = 0;
	state |= GetState();
	return PyInt_FromLong(state);
}

PyObject* KX_GameObject::PySetState(PyObject* self, PyObject* value)
{
	int state_i = PyInt_AsLong(value);
	unsigned int state = 0;
	
	if (state_i == -1 && PyErr_Occurred()) {
		PyErr_SetString(PyExc_TypeError, "expected an int bit field");
		return NULL;
	}
	
	state |= state_i;
	if ((state & ((1<<30)-1)) == 0) {
		PyErr_SetString(PyExc_AttributeError, "The state bitfield was not between 0 and 30 (1<<0 and 1<<29)");
		return NULL;
	}
	SetState(state);
	
	Py_RETURN_NONE;
}



PyObject* KX_GameObject::PyGetVelocity(PyObject* self, PyObject* args)
{
	// only can get the velocity if we have a physics object connected to us...
	MT_Vector3 velocity(0.0,0.0,0.0);
	MT_Point3 point(0.0,0.0,0.0);
	
	
	PyObject* pypos = NULL;
	if (PyArg_ParseTuple(args, "|O", &pypos))
	{
		if (pypos)
			PyVecTo(pypos, point);
	}
	else {
		return NULL;
	}
	
	if (m_pPhysicsController1)
	{
		velocity = m_pPhysicsController1->GetVelocity(point);
	}
	
	return PyObjectFrom(velocity);
}



PyObject* KX_GameObject::PyGetMass(PyObject* self)
{
	return PyFloat_FromDouble(GetPhysicsController()->GetMass());
}



PyObject* KX_GameObject::PyGetReactionForce(PyObject* self)
{
	// only can get the velocity if we have a physics object connected to us...
	return PyObjectFrom(GetPhysicsController()->getReactionForce());
}



PyObject* KX_GameObject::PyEnableRigidBody(PyObject* self)
{
	GetPhysicsController()->setRigidBody(true);

	Py_RETURN_NONE;
}



PyObject* KX_GameObject::PyDisableRigidBody(PyObject* self)
{
	GetPhysicsController()->setRigidBody(false);

	Py_RETURN_NONE;
}



PyObject* KX_GameObject::PyGetParent(PyObject* self)
{
	KX_GameObject* parent = this->GetParent();
	if (parent)
	{
		parent->AddRef();
		return parent;
	}
	Py_RETURN_NONE;
}

PyObject* KX_GameObject::PySetParent(PyObject* self, PyObject* value)
{
	if (!PyObject_TypeCheck(value, &KX_GameObject::Type)) {
		PyErr_SetString(PyExc_TypeError, "expected a KX_GameObject type");
		return NULL;
	}
	
	// The object we want to set as parent
	CValue *m_ob = (CValue*)value;
	KX_GameObject *obj = ((KX_GameObject*)m_ob);
	KX_Scene *scene = PHY_GetActiveScene();
	
	this->SetParent(scene, obj);
		
	Py_RETURN_NONE;
}

PyObject* KX_GameObject::PyRemoveParent(PyObject* self)
{
	KX_Scene *scene = PHY_GetActiveScene();
	this->RemoveParent(scene);
	Py_RETURN_NONE;
}


static void walk_children(SG_Node* node, CListValue* list, bool recursive)
{
	NodeList& children = node->GetSGChildren();

	for (NodeList::iterator childit = children.begin();!(childit==children.end());++childit)
	{
		SG_Node* childnode = (*childit);
		CValue* childobj = (CValue*)childnode->GetSGClientObject();
		if (childobj != NULL) // This is a GameObject
		{
			// add to the list
			list->Add(childobj->AddRef());
		}
		
		// if the childobj is NULL then this may be an inverse parent link
		// so a non recursive search should still look down this node.
		if (recursive || childobj==NULL) {
			walk_children(childnode, list, recursive);
		}
	}
}

PyObject* KX_GameObject::PyGetChildren(PyObject* self)
{
	CListValue* list = new CListValue();
	walk_children(m_pSGNode, list, 0);
	return list;
}

PyObject* KX_GameObject::PyGetChildrenRecursive(PyObject* self)
{
	CListValue* list = new CListValue();
	walk_children(m_pSGNode, list, 1);
	return list;
}

PyObject* KX_GameObject::PyGetMesh(PyObject* self, PyObject* args)
{
	int mesh = 0;

	if (!PyArg_ParseTuple(args, "|i", &mesh))
		return NULL; // python sets a simple error
	
	if (((unsigned int)mesh < m_meshes.size()) && mesh >= 0)
	{
		KX_MeshProxy* meshproxy = new KX_MeshProxy(m_meshes[mesh]);
		return meshproxy;
	}
	
	Py_RETURN_NONE;
}





PyObject* KX_GameObject::PySetCollisionMargin(PyObject* self, PyObject* value)
{
	float collisionMargin = PyFloat_AsDouble(value);
	
	if (collisionMargin==-1 && PyErr_Occurred()) {
		PyErr_SetString(PyExc_TypeError, "expected a float");
		return NULL;
	}
	
	if (m_pPhysicsController1)
	{
		m_pPhysicsController1->setMargin(collisionMargin);
		Py_RETURN_NONE;
	}
	PyErr_SetString(PyExc_RuntimeError, "This object has no physics controller");
	return NULL;
}



PyObject* KX_GameObject::PyApplyImpulse(PyObject* self, PyObject* args)
{
	PyObject* pyattach;
	PyObject* pyimpulse;
	
	if (!m_pPhysicsController1)	{
		PyErr_SetString(PyExc_RuntimeError, "This object has no physics controller");
		return NULL;
	}
	
	if (PyArg_ParseTuple(args, "OO", &pyattach, &pyimpulse))
	{
		MT_Point3  attach;
		MT_Vector3 impulse;
		if (PyVecTo(pyattach, attach) && PyVecTo(pyimpulse, impulse))
		{
			m_pPhysicsController1->applyImpulse(attach, impulse);
			Py_RETURN_NONE;
		}

	}
	
	return NULL;
}



PyObject* KX_GameObject::PySuspendDynamics(PyObject* self)
{
	SuspendDynamics();
	Py_RETURN_NONE;
}



PyObject* KX_GameObject::PyRestoreDynamics(PyObject* self)
{
	RestoreDynamics();
	Py_RETURN_NONE;
}



PyObject* KX_GameObject::PyGetOrientation(PyObject* self) //keywords
{
	return PyObjectFrom(NodeGetWorldOrientation());
}



PyObject* KX_GameObject::PySetOrientation(PyObject* self, PyObject* value)
{
	MT_Matrix3x3 matrix;
	if (PyObject_IsMT_Matrix(value, 3) && PyMatTo(value, matrix))
	{
		NodeSetLocalOrientation(matrix);
		NodeUpdateGS(0.f,true);
		Py_RETURN_NONE;
	}

	MT_Quaternion quat;
	if (PyVecTo(value, quat))
	{
		matrix.setRotation(quat);
		NodeSetLocalOrientation(matrix);
		NodeUpdateGS(0.f,true);
		Py_RETURN_NONE;
	}
	return NULL;
}

PyObject* KX_GameObject::PyAlignAxisToVect(PyObject* self, PyObject* args)
{
	PyObject* pyvect;
	int axis = 2; //z axis is the default
	float fac = 1.0;
	
	if (PyArg_ParseTuple(args,"O|if",&pyvect,&axis, &fac))
	{
		MT_Vector3 vect;
		if (PyVecTo(pyvect, vect))
		{
			if (fac<=0.0) Py_RETURN_NONE; // Nothing to do.
			if (fac> 1.0) fac= 1.0;
			
			AlignAxisToVect(vect,axis,fac);
			NodeUpdateGS(0.f,true);
			Py_RETURN_NONE;
		}
	}
	return NULL;
}

PyObject* KX_GameObject::PyGetAxisVect(PyObject* self, PyObject* value)
{
	MT_Vector3 vect;
	if (PyVecTo(value, vect))
	{
		return PyObjectFrom(NodeGetWorldOrientation() * vect);
	}
	return NULL;
}

PyObject* KX_GameObject::PySetPosition(PyObject* self, PyObject* value)
{
	MT_Point3 pos;
	if (PyVecTo(value, pos))
	{
		NodeSetLocalPosition(pos);
		NodeUpdateGS(0.f,true);
		Py_RETURN_NONE;
	}

	return NULL;
}

PyObject* KX_GameObject::PyGetPhysicsId(PyObject* self)
{
	KX_IPhysicsController* ctrl = GetPhysicsController();
	uint_ptr physid=0;
	if (ctrl)
	{
		physid= (uint_ptr)ctrl->GetUserData();
	}
	return PyInt_FromLong((long)physid);
}

PyObject* KX_GameObject::PyGetPropertyNames(PyObject* self)
{
	return ConvertKeysToPython();
}

KX_PYMETHODDEF_DOC(KX_GameObject, getDistanceTo,
"getDistanceTo(other): get distance to another point/KX_GameObject")
{
	MT_Point3 b;
	if (PyVecArgTo(args, b))
	{
		return PyFloat_FromDouble(NodeGetWorldPosition().distance(b));
	}
	PyErr_Clear();
	
	PyObject *pyother;
	KX_GameObject *other;
	if (PyArg_ParseTuple(args, "O", &pyother) && ConvertPythonToGameObject(pyother, &other, false))
	{
		return PyFloat_FromDouble(NodeGetWorldPosition().distance(other->NodeGetWorldPosition()));
	}
	
	return NULL;
}

KX_PYMETHODDEF_DOC(KX_GameObject, getVectTo,
"getVectTo(other): get vector and the distance to another point/KX_GameObject\n"
"Returns a 3-tuple with (distance,worldVector,localVector)\n")
{
	MT_Point3 toPoint, fromPoint;
	MT_Vector3 toDir, locToDir;
	MT_Scalar distance;

	PyObject *returnValue;
	PyObject *pyother;

	if (!PyVecArgTo(args, toPoint))
	{
		PyErr_Clear();
		
		KX_GameObject *other;
		if (PyArg_ParseTuple(args, "O", &pyother) && ConvertPythonToGameObject(pyother, &other, false))
		{
			toPoint = other->NodeGetWorldPosition();
		} else
		{
			PyErr_SetString(PyExc_TypeError, "Expected a 3D Vector or GameObject type");
			return NULL;
		}
	}

	fromPoint = NodeGetWorldPosition();
	toDir = toPoint-fromPoint;
	distance = toDir.length();

	if (MT_fuzzyZero(distance))
	{
		//cout << "getVectTo() Error: Null vector!\n";
		locToDir = toDir = MT_Vector3(0.0,0.0,0.0);
		distance = 0.0;
	} else {
		toDir.normalize();
		locToDir = toDir * NodeGetWorldOrientation();
	}
	
	returnValue = PyTuple_New(3);
	if (returnValue) { // very unlikely to fail, python sets a memory error here.
		PyTuple_SET_ITEM(returnValue, 0, PyFloat_FromDouble(distance));
		PyTuple_SET_ITEM(returnValue, 1, PyObjectFrom(toDir));
		PyTuple_SET_ITEM(returnValue, 2, PyObjectFrom(locToDir));
	}
	return returnValue;
}

bool KX_GameObject::RayHit(KX_ClientObjectInfo* client, MT_Point3& hit_point, MT_Vector3& hit_normal, void * const data)
{

	KX_GameObject* hitKXObj = client->m_gameobject;
	
	if (client->m_type > KX_ClientObjectInfo::ACTOR)
	{
		// false hit
		return false;
	}

	if (m_testPropName.Length() == 0 || hitKXObj->GetProperty(m_testPropName) != NULL)
	{
		m_pHitObject = hitKXObj;
		return true;
	}

	return false;
	
}

KX_PYMETHODDEF_DOC(KX_GameObject, rayCastTo,
"rayCastTo(other,dist,prop): look towards another point/KX_GameObject and return first object hit within dist that matches prop\n"
" prop = property name that object must have; can be omitted => detect any object\n"
" dist = max distance to look (can be negative => look behind); 0 or omitted => detect up to other\n"
" other = 3-tuple or object reference")
{
	MT_Point3 toPoint;
	PyObject* pyarg;
	float dist = 0.0f;
	char *propName = NULL;

	if (!PyArg_ParseTuple(args,"O|fs", &pyarg, &dist, &propName)) {
		return NULL; // python sets simple error
	}

	if (!PyVecTo(pyarg, toPoint))
	{
		KX_GameObject *other;
		PyErr_Clear();
		
		if (ConvertPythonToGameObject(pyarg, &other, false))
		{
			toPoint = other->NodeGetWorldPosition();
		} else
		{
			PyErr_SetString(PyExc_TypeError, "the first argument to rayCastTo must be a vector or a KX_GameObject");
			return NULL;
		}
	}
	MT_Point3 fromPoint = NodeGetWorldPosition();
	if (dist != 0.0f)
	{
		MT_Vector3 toDir = toPoint-fromPoint;
		toDir.normalize();
		toPoint = fromPoint + (dist) * toDir;
	}

	MT_Point3 resultPoint;
	MT_Vector3 resultNormal;
	PHY_IPhysicsEnvironment* pe = GetPhysicsEnvironment();
	KX_IPhysicsController *spc = GetPhysicsController();
	KX_GameObject *parent = GetParent();
	if (!spc && parent)
		spc = parent->GetPhysicsController();
	if (parent)
		parent->Release();
	
	m_pHitObject = NULL;
	if (propName)
		m_testPropName = propName;
	else
		m_testPropName.SetLength(0);
	KX_RayCast::RayTest(spc, pe, fromPoint, toPoint, resultPoint, resultNormal, KX_RayCast::Callback<KX_GameObject>(this));

    if (m_pHitObject)
	{
		m_pHitObject->AddRef();
		return m_pHitObject;
	}
	Py_RETURN_NONE;
}

KX_PYMETHODDEF_DOC(KX_GameObject, rayCast,
				   "rayCast(to,from,dist,prop): cast a ray and return tuple (object,hit,normal) of contact point with object within dist that matches prop or (None,None,None) tuple if no hit\n"
" prop = property name that object must have; can be omitted => detect any object\n"
" dist = max distance to look (can be negative => look behind); 0 or omitted => detect up to to\n"
" from = 3-tuple or object reference for origin of ray (if object, use center of object)\n"
"        Can be None or omitted => start from self object center\n"
" to = 3-tuple or object reference for destination of ray (if object, use center of object)\n"
"Note: the object on which you call this method matters: the ray will ignore it if it goes through it\n")
{
	MT_Point3 toPoint;
	MT_Point3 fromPoint;
	PyObject* pyto;
	PyObject* pyfrom = NULL;
	float dist = 0.0f;
	char *propName = NULL;
	KX_GameObject *other;

	if (!PyArg_ParseTuple(args,"O|Ofs", &pyto, &pyfrom, &dist, &propName)) {
		return NULL; // Python sets a simple error
	}

	if (!PyVecTo(pyto, toPoint))
	{
		PyErr_Clear();
		
		if (ConvertPythonToGameObject(pyto, &other, false))
		{
			toPoint = other->NodeGetWorldPosition();
		} else
		{
			PyErr_SetString(PyExc_TypeError, "the first argument to rayCast must be a vector or a KX_GameObject");
			return NULL;
		}
	}
	if (!pyfrom || pyfrom == Py_None)
	{
		fromPoint = NodeGetWorldPosition();
	}
	else if (!PyVecTo(pyfrom, fromPoint))
	{
		PyErr_Clear();
		
		if (ConvertPythonToGameObject(pyfrom, &other, false))
		{
			fromPoint = other->NodeGetWorldPosition();
		} else
		{
			PyErr_SetString(PyExc_TypeError, "the second optional argument to rayCast must be a vector or a KX_GameObject");
			return NULL;
		}
	}
	
	if (dist != 0.0f) {
		MT_Vector3 toDir = toPoint-fromPoint;
		if (MT_fuzzyZero(toDir.length2())) {
			return Py_BuildValue("OOO", Py_None, Py_None, Py_None);
		}
		toDir.normalize();
		toPoint = fromPoint + (dist) * toDir;
	} else if (MT_fuzzyZero((toPoint-fromPoint).length2())) {
		return Py_BuildValue("OOO", Py_None, Py_None, Py_None);
	}
	
	MT_Point3 resultPoint;
	MT_Vector3 resultNormal;
	PHY_IPhysicsEnvironment* pe = GetPhysicsEnvironment();
	KX_IPhysicsController *spc = GetPhysicsController();
	KX_GameObject *parent = GetParent();
	if (!spc && parent)
		spc = parent->GetPhysicsController();
	if (parent)
		parent->Release();
	
	m_pHitObject = NULL;
	if (propName)
		m_testPropName = propName;
	else
		m_testPropName.SetLength(0);
	KX_RayCast::RayTest(spc, pe, fromPoint, toPoint, resultPoint, resultNormal, KX_RayCast::Callback<KX_GameObject>(this));

    if (m_pHitObject)
	{
		PyObject* returnValue = PyTuple_New(3);
		if (returnValue) { // unlikely this would ever fail, if it does python sets an error
			PyTuple_SET_ITEM(returnValue, 0, m_pHitObject->AddRef());
			PyTuple_SET_ITEM(returnValue, 1, PyObjectFrom(resultPoint));
			PyTuple_SET_ITEM(returnValue, 2, PyObjectFrom(resultNormal));
		}
		return returnValue;
	}
	return Py_BuildValue("OOO", Py_None, Py_None, Py_None);
	//Py_RETURN_NONE;
}

/* --------------------------------------------------------------------- 
 * Some stuff taken from the header
 * --------------------------------------------------------------------- */
void KX_GameObject::Relink(GEN_Map<GEN_HashedPtr, void*> *map_parameter)	
{
	// we will relink the sensors and actuators that use object references
	// if the object is part of the replicated hierarchy, use the new
	// object reference instead
	SCA_SensorList& sensorlist = GetSensors();
	SCA_SensorList::iterator sit;
	for (sit=sensorlist.begin(); sit != sensorlist.end(); sit++)
	{
		(*sit)->Relink(map_parameter);
	}
	SCA_ActuatorList& actuatorlist = GetActuators();
	SCA_ActuatorList::iterator ait;
	for (ait=actuatorlist.begin(); ait != actuatorlist.end(); ait++)
	{
		(*ait)->Relink(map_parameter);
	}
}

bool ConvertPythonToGameObject(PyObject * value, KX_GameObject **object, bool py_none_ok)
{
	if (value==NULL) {
		PyErr_SetString(PyExc_TypeError, "Error in ConvertPythonToGameObject, python pointer NULL, should never happen");
		*object = NULL;
		return false;
	}
		
	if (value==Py_None) {
		*object = NULL;
		
		if (py_none_ok) {
			return true;
		} else {
			PyErr_SetString(PyExc_TypeError, "Expected KX_GameObject or a string for a name of a KX_GameObject, None is invalid");
			return false;
		}
		return (py_none_ok ? true : false);
	}
	
	if (PyString_Check(value)) {
		*object = (KX_GameObject *)SCA_ILogicBrick::m_sCurrentLogicManager->GetGameObjectByName(STR_String( PyString_AsString(value) ));
		
		if (*object) {
			return true;
		} else {
			PyErr_SetString(PyExc_ValueError, "Requested name did not match any KX_GameObject");
			return false;
		}
	}
	
	if (PyObject_TypeCheck(value, &KX_GameObject::Type)) {
		*object = static_cast<KX_GameObject*>(value);
		return true;
	}
	
	*object = NULL;
	
	if (py_none_ok) {
		PyErr_SetString(PyExc_TypeError, "Expect a KX_GameObject, a string or None");
	} else {
		PyErr_SetString(PyExc_TypeError, "Expect a KX_GameObject or a string");
	}
	
	return false;
}