text: /*************************************************************************/
  /*  area.cpp                                                             */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                    http://www.godotengine.org                         */
  /*************************************************************************/
  /* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur.                 */
  /*                                                                       */
  /* Permission is hereby granted, free of charge, to any person obtaining */
  /* a copy of this software and associated documentation files (the       */
  /* "Software"), to deal in the Software without restriction, including   */
  /* without limitation the rights to use, copy, modify, merge, publish,   */
  /* distribute, sublicense, and/or sell copies of the Software, and to    */
  /* permit persons to whom the Software is furnished to do so, subject to */
  /* the following conditions:                                             */
  /*                                                                       */
  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
  /*                                                                       */
  /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
  /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
  /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
  /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
  /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
  /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
  /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
  /*************************************************************************/
  #include "area.h"
  #include "scene/scene_string_names.h"
  #include "servers/physics_server.h"
  void Area::set_space_override_mode(SpaceOverride p_mode) {
  
  	space_override=p_mode;
  	PhysicsServer::get_singleton()->area_set_space_override_mode(get_rid(),PhysicsServer::AreaSpaceOverrideMode(p_mode));
  
  
  }
  Area::SpaceOverride Area::get_space_override_mode() const{
  
  	return space_override;
  }
  
  void Area::set_gravity_is_point(bool p_enabled){
  
  	gravity_is_point=p_enabled;
  	PhysicsServer::get_singleton()->area_set_param(get_rid(),PhysicsServer::AREA_PARAM_GRAVITY_IS_POINT,p_enabled);
  
  }
  bool Area::is_gravity_a_point() const{
  
  	return gravity_is_point;
  }
  
  void Area::set_gravity_vector(const Vector3& p_vec){
  
  	gravity_vec=p_vec;
  	PhysicsServer::get_singleton()->area_set_param(get_rid(),PhysicsServer::AREA_PARAM_GRAVITY_VECTOR,p_vec);
  
  }
  Vector3 Area::get_gravity_vector() const{
  
  	return gravity_vec;
  }
  
  void Area::set_gravity(real_t p_gravity){
  
  	gravity=p_gravity;
  	PhysicsServer::get_singleton()->area_set_param(get_rid(),PhysicsServer::AREA_PARAM_GRAVITY,p_gravity);
  }
  real_t Area::get_gravity() const{
  
  	return gravity;
  }
  
  void Area::set_density(real_t p_density){
  
  	density=p_density;
  	PhysicsServer::get_singleton()->area_set_param(get_rid(),PhysicsServer::AREA_PARAM_DENSITY,p_density);
  }
  real_t Area::get_density() const{
  
  	return density;
  }
  
  void Area::set_priority(real_t p_priority){
  
  	priority=p_priority;
  	PhysicsServer::get_singleton()->area_set_param(get_rid(),PhysicsServer::AREA_PARAM_PRIORITY,p_priority);
  }
  real_t Area::get_priority() const{
  
  	return priority;
  }
  
  
  void Area::_body_enter_tree(ObjectID p_id) {
  
  	Object *obj = ObjectDB::get_instance(p_id);
  	Node *node = obj ? obj->cast_to<Node>() : NULL;
  	ERR_FAIL_COND(!node);
  
  	Map<ObjectID,BodyState>::Element *E=body_map.find(p_id);
  	ERR_FAIL_COND(!E);
  	ERR_FAIL_COND(E->get().in_tree);
  
  	E->get().in_tree=true;
  	emit_signal(SceneStringNames::get_singleton()->body_enter,node);
  	for(int i=0;i<E->get().shapes.size();i++) {
  
  		emit_signal(SceneStringNames::get_singleton()->body_enter_shape,p_id,node,E->get().shapes[i].body_shape,E->get().shapes[i].area_shape);
  	}
  
  }
  
  void Area::_body_exit_tree(ObjectID p_id) {
  
  
  	Object *obj = ObjectDB::get_instance(p_id);
  	Node *node = obj ? obj->cast_to<Node>() : NULL;
  	ERR_FAIL_COND(!node);
  	Map<ObjectID,BodyState>::Element *E=body_map.find(p_id);
  	ERR_FAIL_COND(!E);
  	ERR_FAIL_COND(!E->get().in_tree);
  	E->get().in_tree=false;
  	emit_signal(SceneStringNames::get_singleton()->body_exit,node);
  	for(int i=0;i<E->get().shapes.size();i++) {
  
  		emit_signal(SceneStringNames::get_singleton()->body_exit_shape,p_id,node,E->get().shapes[i].body_shape,E->get().shapes[i].area_shape);
  	}
  
  }
  
  void Area::_body_inout(int p_status,const RID& p_body, int p_instance, int p_body_shape,int p_area_shape) {
  
  
  	bool body_in = p_status==PhysicsServer::AREA_BODY_ADDED;
  	ObjectID objid=p_instance;
  
  	Object *obj = ObjectDB::get_instance(objid);
  	Node *node = obj ? obj->cast_to<Node>() : NULL;
  
  	Map<ObjectID,BodyState>::Element *E=body_map.find(objid);
  
  	ERR_FAIL_COND(!body_in && !E);
  
  	locked=true;
  
  	if (body_in) {
  		if (!E) {
  
  			E = body_map.insert(objid,BodyState());
  			E->get().rc=0;
  			E->get().in_tree=node && node->is_inside_tree();
  			if (node) {
  				node->connect(SceneStringNames::get_singleton()->enter_tree,this,SceneStringNames::get_singleton()->_body_enter_tree,make_binds(objid));
  				node->connect(SceneStringNames::get_singleton()->exit_tree,this,SceneStringNames::get_singleton()->_body_exit_tree,make_binds(objid));
  				if (E->get().in_tree) {
  					emit_signal(SceneStringNames::get_singleton()->body_enter,node);
  				}
  			}
  
  		}
  		E->get().rc++;
  		if (node)
  			E->get().shapes.insert(ShapePair(p_body_shape,p_area_shape));
  
  
  		if (E->get().in_tree) {
  			emit_signal(SceneStringNames::get_singleton()->body_enter_shape,objid,node,p_body_shape,p_area_shape);
  		}
  
  	} else {
  
  		E->get().rc--;
  
  		if (node)
  			E->get().shapes.erase(ShapePair(p_body_shape,p_area_shape));
  
  		bool eraseit=false;
  
  		if (E->get().rc==0) {
  
  			if (node) {
  				node->disconnect(SceneStringNames::get_singleton()->enter_tree,this,SceneStringNames::get_singleton()->_body_enter_tree);
  				node->disconnect(SceneStringNames::get_singleton()->exit_tree,this,SceneStringNames::get_singleton()->_body_exit_tree);
  				if (E->get().in_tree)
  					emit_signal(SceneStringNames::get_singleton()->body_exit,obj);
  
  			}
  
  			eraseit=true;
  
  		}
  		if (node && E->get().in_tree) {
  			emit_signal(SceneStringNames::get_singleton()->body_exit_shape,objid,obj,p_body_shape,p_area_shape);
  		}
  
  		if (eraseit)
  			body_map.erase(E);
  
  	}
  
  	locked=false;
  
  
  }
  
  
  void Area::_clear_monitoring() {
  
  	if (locked) {
  		ERR_EXPLAIN("This function can't be used during the in/out signal.");
  	}
  	ERR_FAIL_COND(locked);
  
  	Map<ObjectID,BodyState> bmcopy = body_map;
  	body_map.clear();
  	//disconnect all monitored stuff
  
  	for (Map<ObjectID,BodyState>::Element *E=bmcopy.front();E;E=E->next()) {
  
  		Object *obj = ObjectDB::get_instance(E->key());
  		Node *node = obj ? obj->cast_to<Node>() : NULL;
  		ERR_CONTINUE(!node);
  		if (!E->get().in_tree)
  			continue;
  
  		for(int i=0;i<E->get().shapes.size();i++) {
  
  			emit_signal(SceneStringNames::get_singleton()->body_exit_shape,E->key(),node,E->get().shapes[i].body_shape,E->get().shapes[i].area_shape);
  		}
  
  		emit_signal(SceneStringNames::get_singleton()->body_exit,obj);
  
  		node->disconnect(SceneStringNames::get_singleton()->enter_tree,this,SceneStringNames::get_singleton()->_body_enter_tree);
  		node->disconnect(SceneStringNames::get_singleton()->exit_tree,this,SceneStringNames::get_singleton()->_body_exit_tree);
  	}
  
  }
  void Area::_notification(int p_what) {
  
  	if (p_what==NOTIFICATION_EXIT_TREE) {
  		_clear_monitoring();
  	}
  }
  
  void Area::set_enable_monitoring(bool p_enable) {
  
  	if (locked) {
  		ERR_EXPLAIN("This function can't be used during the in/out signal.");
  	}
  	ERR_FAIL_COND(locked);
  
  	if (p_enable==monitoring)
  		return;
  
  	monitoring=p_enable;
  
  	if (monitoring) {
  
  		PhysicsServer::get_singleton()->area_set_monitor_callback(get_rid(),this,"_body_inout");
  	} else {
  		PhysicsServer::get_singleton()->area_set_monitor_callback(get_rid(),NULL,StringName());
  		_clear_monitoring();
  	}
  }
  
  bool Area::is_monitoring_enabled() const {
  
  	return monitoring;
  }
  
  
  Array Area::get_overlapping_bodies() const {
  
  	ERR_FAIL_COND_V(!monitoring,Array());
  	Array ret;
  	ret.resize(body_map.size());
  	int idx=0;
  	for (const Map<ObjectID,BodyState>::Element *E=body_map.front();E;E=E->next()) {
  		Object *obj = ObjectDB::get_instance(E->key());
  		if (!obj) {
  			ret.resize( ret.size() -1 ); //ops
  		} else {
  			ret[idx++]=obj;
  		}
  
  	}
  
  	return ret;
  }
  
  void Area::_bind_methods() {
  
  	ObjectTypeDB::bind_method(_MD("_body_enter_tree","id"),&Area::_body_enter_tree);
  	ObjectTypeDB::bind_method(_MD("_body_exit_tree","id"),&Area::_body_exit_tree);
  
  	ObjectTypeDB::bind_method(_MD("set_space_override_mode","enable"),&Area::set_space_override_mode);
  	ObjectTypeDB::bind_method(_MD("get_space_override_mode"),&Area::get_space_override_mode);
  
  	ObjectTypeDB::bind_method(_MD("set_gravity_is_point","enable"),&Area::set_gravity_is_point);
  	ObjectTypeDB::bind_method(_MD("is_gravity_a_point"),&Area::is_gravity_a_point);
  
  	ObjectTypeDB::bind_method(_MD("set_gravity_vector","vector"),&Area::set_gravity_vector);
  	ObjectTypeDB::bind_method(_MD("get_gravity_vector"),&Area::get_gravity_vector);
  
  	ObjectTypeDB::bind_method(_MD("set_gravity","gravity"),&Area::set_gravity);
  	ObjectTypeDB::bind_method(_MD("get_gravity"),&Area::get_gravity);
  
  	ObjectTypeDB::bind_method(_MD("set_density","density"),&Area::set_density);
  	ObjectTypeDB::bind_method(_MD("get_density"),&Area::get_density);
  
  	ObjectTypeDB::bind_method(_MD("set_priority","priority"),&Area::set_priority);
  	ObjectTypeDB::bind_method(_MD("get_priority"),&Area::get_priority);
  
  
  	ObjectTypeDB::bind_method(_MD("set_enable_monitoring","enable"),&Area::set_enable_monitoring);
  	ObjectTypeDB::bind_method(_MD("is_monitoring_enabled"),&Area::is_monitoring_enabled);
  
  	ObjectTypeDB::bind_method(_MD("get_overlapping_bodies"),&Area::get_overlapping_bodies);
  
  	ObjectTypeDB::bind_method(_MD("_body_inout"),&Area::_body_inout);
  
  
  	ADD_SIGNAL( MethodInfo("body_enter_shape",PropertyInfo(Variant::INT,"body_id"),PropertyInfo(Variant::OBJECT,"body"),PropertyInfo(Variant::INT,"body_shape"),PropertyInfo(Variant::INT,"area_shape")));
  	ADD_SIGNAL( MethodInfo("body_exit_shape",PropertyInfo(Variant::INT,"body_id"),PropertyInfo(Variant::OBJECT,"body"),PropertyInfo(Variant::INT,"body_shape"),PropertyInfo(Variant::INT,"area_shape")));
  	ADD_SIGNAL( MethodInfo("body_enter",PropertyInfo(Variant::OBJECT,"body")));
  	ADD_SIGNAL( MethodInfo("body_exit",PropertyInfo(Variant::OBJECT,"body")));
  
  	ADD_PROPERTY( PropertyInfo(Variant::INT,"space_override",PROPERTY_HINT_ENUM,"Disabled,Combine,Replace"),_SCS("set_space_override_mode"),_SCS("get_space_override_mode"));
  	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"gravity_point"),_SCS("set_gravity_is_point"),_SCS("is_gravity_a_point"));
  	ADD_PROPERTY( PropertyInfo(Variant::VECTOR3,"gravity_vec"),_SCS("set_gravity_vector"),_SCS("get_gravity_vector"));
  	ADD_PROPERTY( PropertyInfo(Variant::REAL,"gravity",PROPERTY_HINT_RANGE,"-1024,1024,0.01"),_SCS("set_gravity"),_SCS("get_gravity"));
  	ADD_PROPERTY( PropertyInfo(Variant::REAL,"density",PROPERTY_HINT_RANGE,"0,1024,0.001"),_SCS("set_density"),_SCS("get_density"));
  	ADD_PROPERTY( PropertyInfo(Variant::INT,"priority",PROPERTY_HINT_RANGE,"0,128,1"),_SCS("set_priority"),_SCS("get_priority"));
  	ADD_PROPERTY( PropertyInfo(Variant::BOOL,"monitoring"),_SCS("set_enable_monitoring"),_SCS("is_monitoring_enabled"));
  
  }
  
  Area::Area() : CollisionObject(PhysicsServer::get_singleton()->area_create(),true) {
  
  	space_override=SPACE_OVERRIDE_DISABLED;
  	set_gravity(9.8);;
  	locked=false;
  	set_gravity_vector(Vector3(0,-1,0));
  	gravity_is_point=false;
  	density=0.1;
  	priority=0;
  	monitoring=false;
  	set_ray_pickable(false);
  	set_enable_monitoring(true);
  
  }
  
  Area::~Area() {
  
  
  }
  