godot/servers/physics_2d/physics_2d_server_sw.cpp

/*************************************************************************/
/*  physics_2d_server_sw.cpp                                             */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2014 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    */
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/* the following conditions:                                             */
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/* 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,  */
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/*************************************************************************/
#include "physics_2d_server_sw.h"
#include "broad_phase_2d_basic.h"
#include "broad_phase_2d_hash_grid.h"
#include "collision_solver_2d_sw.h"

RID Physics2DServerSW::shape_create(ShapeType p_shape) {

	Shape2DSW *shape=NULL;
	switch(p_shape) {

		case SHAPE_LINE: {

			shape=memnew( LineShape2DSW );
		} break;
		case SHAPE_RAY: {

			shape=memnew( RayShape2DSW );
		} break;
		case SHAPE_SEGMENT: {

			shape=memnew( SegmentShape2DSW);
		} break;
		case SHAPE_CIRCLE: {

			shape=memnew( CircleShape2DSW);
		} break;
		case SHAPE_RECTANGLE: {

			shape=memnew( RectangleShape2DSW);
		} break;
		case SHAPE_CAPSULE: {

			shape=memnew( CapsuleShape2DSW );
		} break;
		case SHAPE_CONVEX_POLYGON: {

			shape=memnew( ConvexPolygonShape2DSW );
		} break;
		case SHAPE_CONCAVE_POLYGON: {

			shape=memnew( ConcavePolygonShape2DSW );
		} break;
		case SHAPE_CUSTOM: {

			ERR_FAIL_V(RID());

		} break;

	}

	RID id = shape_owner.make_rid(shape);
	shape->set_self(id);

	return id;
};




void Physics2DServerSW::shape_set_data(RID p_shape, const Variant& p_data) {

	Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND(!shape);
	shape->set_data(p_data);


};


void Physics2DServerSW::shape_set_custom_solver_bias(RID p_shape, real_t p_bias) {

	Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND(!shape);
	shape->set_custom_bias(p_bias);

}


Physics2DServer::ShapeType Physics2DServerSW::shape_get_type(RID p_shape) const {

	const Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND_V(!shape,SHAPE_CUSTOM);
	return shape->get_type();

};

Variant Physics2DServerSW::shape_get_data(RID p_shape) const {

	const Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND_V(!shape,Variant());
	ERR_FAIL_COND_V(!shape->is_configured(),Variant());
	return shape->get_data();

};

real_t Physics2DServerSW::shape_get_custom_solver_bias(RID p_shape) const {

	const Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND_V(!shape,0);
	return shape->get_custom_bias();

}


void Physics2DServerSW::_shape_col_cbk(const Vector2& p_point_A,const Vector2& p_point_B,void *p_userdata) {


	CollCbkData *cbk=(CollCbkData *)p_userdata;

	if (cbk->max==0)
		return;

	if (cbk->valid_dir!=Vector2()) {
		if (p_point_A.distance_squared_to(p_point_B)>cbk->valid_depth*cbk->valid_depth) {
			return;
		}
		if (cbk->valid_dir.dot((p_point_A-p_point_B).normalized())<0.7071) {
/*			print_line("A: "+p_point_A);
			print_line("B: "+p_point_B);
			print_line("discard too angled "+rtos(cbk->valid_dir.dot((p_point_A-p_point_B))));
			print_line("resnorm: "+(p_point_A-p_point_B).normalized());
			print_line("distance: "+rtos(p_point_A.distance_to(p_point_B)));
*/
			return;
		}
	}

	if (cbk->amount == cbk->max) {
		//find least deep
		float min_depth=1e20;
		int min_depth_idx=0;
		for(int i=0;i<cbk->amount;i++) {

			float d = cbk->ptr[i*2+0].distance_squared_to(cbk->ptr[i*2+1]);
			if (d<min_depth) {
				min_depth=d;
				min_depth_idx=i;
			}

		}

		float d = p_point_A.distance_squared_to(p_point_B);
		if (d<min_depth)
			return;
		cbk->ptr[min_depth_idx*2+0]=p_point_A;
		cbk->ptr[min_depth_idx*2+1]=p_point_B;


	} else {

		cbk->ptr[cbk->amount*2+0]=p_point_A;
		cbk->ptr[cbk->amount*2+1]=p_point_B;
		cbk->amount++;
	}
}

bool Physics2DServerSW::shape_collide(RID p_shape_A, const Matrix32& p_xform_A,const Vector2& p_motion_A,RID p_shape_B, const Matrix32& p_xform_B, const Vector2& p_motion_B,Vector2 *r_results,int p_result_max,int &r_result_count) {


	Shape2DSW *shape_A = shape_owner.get(p_shape_A);
	ERR_FAIL_COND_V(!shape_A,false);
	Shape2DSW *shape_B = shape_owner.get(p_shape_B);
	ERR_FAIL_COND_V(!shape_B,false);

	if (p_result_max==0) {

		return CollisionSolver2DSW::solve(shape_A,p_xform_A,p_motion_A,shape_B,p_xform_B,p_motion_B,NULL,NULL);
	}

	CollCbkData cbk;
	cbk.max=p_result_max;
	cbk.amount=0;
	cbk.ptr=r_results;

	bool res= CollisionSolver2DSW::solve(shape_A,p_xform_A,p_motion_A,shape_B,p_xform_B,p_motion_B,_shape_col_cbk,&cbk);
	r_result_count=cbk.amount;
	return res;

}


RID Physics2DServerSW::space_create() {

	Space2DSW *space = memnew( Space2DSW );
	RID id = space_owner.make_rid(space);
	space->set_self(id);
	RID area_id = area_create();
	Area2DSW *area = area_owner.get(area_id);
	ERR_FAIL_COND_V(!area,RID());
	space->set_default_area(area);
	area->set_space(space);
	area->set_priority(-1);

	return id;
};

void Physics2DServerSW::space_set_active(RID p_space,bool p_active) {

	Space2DSW *space = space_owner.get(p_space);
	ERR_FAIL_COND(!space);
	if (p_active)
		active_spaces.insert(space);
	else
		active_spaces.erase(space);
}

bool Physics2DServerSW::space_is_active(RID p_space) const {

	const Space2DSW *space = space_owner.get(p_space);
	ERR_FAIL_COND_V(!space,false);

	return active_spaces.has(space);

}

void Physics2DServerSW::space_set_param(RID p_space,SpaceParameter p_param, real_t p_value) {

	Space2DSW *space = space_owner.get(p_space);
	ERR_FAIL_COND(!space);

	space->set_param(p_param,p_value);

}

real_t Physics2DServerSW::space_get_param(RID p_space,SpaceParameter p_param) const {

	const Space2DSW *space = space_owner.get(p_space);
	ERR_FAIL_COND_V(!space,0);
	return space->get_param(p_param);
}

Physics2DDirectSpaceState* Physics2DServerSW::space_get_direct_state(RID p_space) {

	Space2DSW *space = space_owner.get(p_space);
	ERR_FAIL_COND_V(!space,NULL);
	if (/*doing_sync ||*/ space->is_locked()) {

		ERR_EXPLAIN("Space state is inaccesible right now, wait for iteration or fixed process notification.");
		ERR_FAIL_V(NULL);
	}

	return space->get_direct_state();
}

RID Physics2DServerSW::area_create() {

	Area2DSW *area = memnew( Area2DSW );
	RID rid = area_owner.make_rid(area);
	area->set_self(rid);
	return rid;
};

void Physics2DServerSW::area_set_space(RID p_area, RID p_space) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);
	Space2DSW *space=NULL;
	if (p_space.is_valid()) {
		space = space_owner.get(p_space);
		ERR_FAIL_COND(!space);
	}

	area->set_space(space);

};

RID Physics2DServerSW::area_get_space(RID p_area) const {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,RID());

	Space2DSW *space = area->get_space();
	if (!space)
		return RID();
	return space->get_self();
};

void Physics2DServerSW::area_set_space_override_mode(RID p_area, AreaSpaceOverrideMode p_mode) {


	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	area->set_space_override_mode(p_mode);
}

Physics2DServer::AreaSpaceOverrideMode Physics2DServerSW::area_get_space_override_mode(RID p_area) const {

	const Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,AREA_SPACE_OVERRIDE_DISABLED);

	return area->get_space_override_mode();
}


void Physics2DServerSW::area_add_shape(RID p_area, RID p_shape, const Matrix32& p_transform) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND(!shape);

	area->add_shape(shape,p_transform);

}

void Physics2DServerSW::area_set_shape(RID p_area, int p_shape_idx,RID p_shape) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND(!shape);
	ERR_FAIL_COND(!shape->is_configured());

	area->set_shape(p_shape_idx,shape);

}
void Physics2DServerSW::area_set_shape_transform(RID p_area, int p_shape_idx, const Matrix32& p_transform) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	area->set_shape_transform(p_shape_idx,p_transform);
}

int Physics2DServerSW::area_get_shape_count(RID p_area) const {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,-1);

	return area->get_shape_count();

}
RID Physics2DServerSW::area_get_shape(RID p_area, int p_shape_idx) const {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,RID());

	Shape2DSW *shape = area->get_shape(p_shape_idx);
	ERR_FAIL_COND_V(!shape,RID());

	return shape->get_self();
}
Matrix32 Physics2DServerSW::area_get_shape_transform(RID p_area, int p_shape_idx) const {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,Matrix32());

	return area->get_shape_transform(p_shape_idx);
}

void Physics2DServerSW::area_remove_shape(RID p_area, int p_shape_idx) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	area->remove_shape(p_shape_idx);
}

void Physics2DServerSW::area_clear_shapes(RID p_area) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	while(area->get_shape_count())
		area->remove_shape(0);

}

void Physics2DServerSW::area_attach_object_instance_ID(RID p_area,ObjectID p_ID) {

	if (space_owner.owns(p_area)) {
		Space2DSW *space=space_owner.get(p_area);
		p_area=space->get_default_area()->get_self();
	}
	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);
	area->set_instance_id(p_ID);

}
ObjectID Physics2DServerSW::area_get_object_instance_ID(RID p_area) const {

	if (space_owner.owns(p_area)) {
		Space2DSW *space=space_owner.get(p_area);
		p_area=space->get_default_area()->get_self();
	}
	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,0);
	return area->get_instance_id();


}


void Physics2DServerSW::area_set_param(RID p_area,AreaParameter p_param,const Variant& p_value) {

	if (space_owner.owns(p_area)) {
		Space2DSW *space=space_owner.get(p_area);
		p_area=space->get_default_area()->get_self();
	}
	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);
	area->set_param(p_param,p_value);

};


void Physics2DServerSW::area_set_transform(RID p_area, const Matrix32& p_transform) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);
	area->set_transform(p_transform);

};

Variant Physics2DServerSW::area_get_param(RID p_area,AreaParameter p_param) const {

	if (space_owner.owns(p_area)) {
		Space2DSW *space=space_owner.get(p_area);
		p_area=space->get_default_area()->get_self();
	}
	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,Variant());

	return area->get_param(p_param);
};

Matrix32 Physics2DServerSW::area_get_transform(RID p_area) const {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND_V(!area,Matrix32());

	return area->get_transform();
};

void Physics2DServerSW::area_set_monitorable(RID p_area,bool p_monitorable) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	area->set_monitorable(p_monitorable);

}


void Physics2DServerSW::area_set_monitor_callback(RID p_area,Object *p_receiver,const StringName& p_method) {

	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	area->set_monitor_callback(p_receiver?p_receiver->get_instance_ID():0,p_method);


}

void Physics2DServerSW::area_set_area_monitor_callback(RID p_area,Object *p_receiver,const StringName& p_method) {


	Area2DSW *area = area_owner.get(p_area);
	ERR_FAIL_COND(!area);

	area->set_area_monitor_callback(p_receiver?p_receiver->get_instance_ID():0,p_method);
}

/* BODY API */

RID Physics2DServerSW::body_create(BodyMode p_mode,bool p_init_sleeping) {

	Body2DSW *body = memnew( Body2DSW );
	if (p_mode!=BODY_MODE_RIGID)
		body->set_mode(p_mode);
	if (p_init_sleeping)
		body->set_state(BODY_STATE_SLEEPING,p_init_sleeping);
	RID rid = body_owner.make_rid(body);
	body->set_self(rid);
	return rid;
};


void Physics2DServerSW::body_set_space(RID p_body, RID p_space) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	Space2DSW *space=NULL;
	if (p_space.is_valid()) {
		space = space_owner.get(p_space);
		ERR_FAIL_COND(!space);
	}

	body->set_space(space);

};

RID Physics2DServerSW::body_get_space(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,RID());

	Space2DSW *space = body->get_space();
	if (!space)
		return RID();
	return space->get_self();
};


void Physics2DServerSW::body_set_mode(RID p_body, BodyMode p_mode) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_mode(p_mode);
};

Physics2DServer::BodyMode Physics2DServerSW::body_get_mode(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,BODY_MODE_STATIC);

	return body->get_mode();
};

void Physics2DServerSW::body_add_shape(RID p_body, RID p_shape, const Matrix32& p_transform) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND(!shape);

	body->add_shape(shape,p_transform);

}

void Physics2DServerSW::body_set_shape(RID p_body, int p_shape_idx,RID p_shape) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	Shape2DSW *shape = shape_owner.get(p_shape);
	ERR_FAIL_COND(!shape);
	ERR_FAIL_COND(!shape->is_configured());

	body->set_shape(p_shape_idx,shape);

}
void Physics2DServerSW::body_set_shape_transform(RID p_body, int p_shape_idx, const Matrix32& p_transform) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_shape_transform(p_shape_idx,p_transform);
}

void Physics2DServerSW::body_set_shape_metadata(RID p_body, int p_shape_idx, const Variant& p_metadata) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_shape_metadata(p_shape_idx,p_metadata);
}


Variant Physics2DServerSW::body_get_shape_metadata(RID p_body, int p_shape_idx) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,Variant());
	return body->get_shape_metadata(p_shape_idx);
}


int Physics2DServerSW::body_get_shape_count(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,-1);

	return body->get_shape_count();

}
RID Physics2DServerSW::body_get_shape(RID p_body, int p_shape_idx) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,RID());

	Shape2DSW *shape = body->get_shape(p_shape_idx);
	ERR_FAIL_COND_V(!shape,RID());

	return shape->get_self();
}
Matrix32 Physics2DServerSW::body_get_shape_transform(RID p_body, int p_shape_idx) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,Matrix32());

	return body->get_shape_transform(p_shape_idx);
}

void Physics2DServerSW::body_remove_shape(RID p_body, int p_shape_idx) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->remove_shape(p_shape_idx);
}

void Physics2DServerSW::body_clear_shapes(RID p_body) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	while(body->get_shape_count())
		body->remove_shape(0);

}


void Physics2DServerSW::body_set_shape_as_trigger(RID p_body, int p_shape_idx,bool p_enable) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	ERR_FAIL_INDEX(p_shape_idx,body->get_shape_count());

	body->set_shape_as_trigger(p_shape_idx,p_enable);

}

bool Physics2DServerSW::body_is_shape_set_as_trigger(RID p_body, int p_shape_idx) const {

	const Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,false);

	ERR_FAIL_INDEX_V(p_shape_idx,body->get_shape_count(),false);

	return body->is_shape_set_as_trigger(p_shape_idx);

}


void Physics2DServerSW::body_set_continuous_collision_detection_mode(RID p_body,CCDMode p_mode) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_continuous_collision_detection_mode(p_mode);

}

Physics2DServerSW::CCDMode Physics2DServerSW::body_get_continuous_collision_detection_mode(RID p_body) const{

	const Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,CCD_MODE_DISABLED);

	return body->get_continuous_collision_detection_mode();

}



void Physics2DServerSW::body_attach_object_instance_ID(RID p_body,uint32_t p_ID) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_instance_id(p_ID);

};

uint32_t Physics2DServerSW::body_get_object_instance_ID(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,0);

	return body->get_instance_id();
};

void Physics2DServerSW::body_set_layer_mask(RID p_body, uint32_t p_flags) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_layer_mask(p_flags);

};

uint32_t Physics2DServerSW::body_get_layer_mask(RID p_body, uint32_t p_flags) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,0);

	return body->get_layer_mask();
};


void Physics2DServerSW::body_set_user_mask(RID p_body, uint32_t p_flags) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_user_mask(p_flags);

};

uint32_t Physics2DServerSW::body_get_user_mask(RID p_body, uint32_t p_flags) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,0);

	return body->get_user_mask();
};

void Physics2DServerSW::body_set_param(RID p_body, BodyParameter p_param, float p_value) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_param(p_param,p_value);
};

float Physics2DServerSW::body_get_param(RID p_body, BodyParameter p_param) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,0);

	return body->get_param(p_param);
};



void Physics2DServerSW::body_set_state(RID p_body, BodyState p_state, const Variant& p_variant) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_state(p_state,p_variant);
};

Variant Physics2DServerSW::body_get_state(RID p_body, BodyState p_state) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,Variant());

	return body->get_state(p_state);
};


void Physics2DServerSW::body_set_applied_force(RID p_body, const Vector2& p_force) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_applied_force(p_force);
};

Vector2 Physics2DServerSW::body_get_applied_force(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,Vector2());
	return body->get_applied_force();
};

void Physics2DServerSW::body_set_applied_torque(RID p_body, float p_torque) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_applied_torque(p_torque);
};

float Physics2DServerSW::body_get_applied_torque(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,0);

	return body->get_applied_torque();
};

void Physics2DServerSW::body_apply_impulse(RID p_body, const Vector2& p_pos, const Vector2& p_impulse) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->apply_impulse(p_pos,p_impulse);
};

void Physics2DServerSW::body_set_axis_velocity(RID p_body, const Vector2& p_axis_velocity) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	Vector2 v = body->get_linear_velocity();
	Vector2 axis = p_axis_velocity.normalized();
	v-=axis*axis.dot(v);
	v+=p_axis_velocity;
	body->set_linear_velocity(v);

};

void Physics2DServerSW::body_add_collision_exception(RID p_body, RID p_body_b) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->add_exception(p_body_b);

};

void Physics2DServerSW::body_remove_collision_exception(RID p_body, RID p_body_b) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->remove_exception(p_body_b);

};

void Physics2DServerSW::body_get_collision_exceptions(RID p_body, List<RID> *p_exceptions) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	for(int i=0;i<body->get_exceptions().size();i++) {
		p_exceptions->push_back(body->get_exceptions()[i]);
	}

};

void Physics2DServerSW::body_set_contacts_reported_depth_treshold(RID p_body, float p_treshold) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

};

float Physics2DServerSW::body_get_contacts_reported_depth_treshold(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,0);
	return 0;
};

void Physics2DServerSW::body_set_omit_force_integration(RID p_body,bool p_omit) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);

	body->set_omit_force_integration(p_omit);
};

bool Physics2DServerSW::body_is_omitting_force_integration(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,false);
	return body->get_omit_force_integration();
};

void Physics2DServerSW::body_set_max_contacts_reported(RID p_body, int p_contacts) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_max_contacts_reported(p_contacts);
}

int Physics2DServerSW::body_get_max_contacts_reported(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,-1);
	return body->get_max_contacts_reported();
}

void Physics2DServerSW::body_set_one_way_collision_direction(RID p_body,const Vector2& p_direction) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_one_way_collision_direction(p_direction);
}

Vector2 Physics2DServerSW::body_get_one_way_collision_direction(RID p_body) const{

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,Vector2());
	return body->get_one_way_collision_direction();

}

void Physics2DServerSW::body_set_one_way_collision_max_depth(RID p_body,float p_max_depth) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_one_way_collision_max_depth(p_max_depth);

}

float Physics2DServerSW::body_get_one_way_collision_max_depth(RID p_body) const {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,0);
	return body->get_one_way_collision_max_depth();

}

void Physics2DServerSW::body_set_force_integration_callback(RID p_body,Object *p_receiver,const StringName& p_method,const Variant& p_udata) {


	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND(!body);
	body->set_force_integration_callback(p_receiver?p_receiver->get_instance_ID():ObjectID(0),p_method,p_udata);

}

bool Physics2DServerSW::body_collide_shape(RID p_body, int p_body_shape, RID p_shape, const Matrix32& p_shape_xform,const Vector2& p_motion,Vector2 *r_results,int p_result_max,int &r_result_count) {

	Body2DSW *body = body_owner.get(p_body);
	ERR_FAIL_COND_V(!body,false);
	ERR_FAIL_INDEX_V(p_body_shape,body->get_shape_count(),false);

	return shape_collide(body->get_shape(p_body_shape)->get_self(),body->get_transform() * body->get_shape_transform(p_body_shape),Vector2(),p_shape,p_shape_xform,p_motion,r_results,p_result_max,r_result_count);

}


/* JOINT API */

void Physics2DServerSW::joint_set_param(RID p_joint, JointParam p_param, real_t p_value) {

	Joint2DSW *joint = joint_owner.get(p_joint);
	ERR_FAIL_COND(!joint);

	switch(p_param) {
		case JOINT_PARAM_BIAS: joint->set_bias(p_value); break;
		case JOINT_PARAM_MAX_BIAS: joint->set_max_bias(p_value); break;
		case JOINT_PARAM_MAX_FORCE: joint->set_max_force(p_value); break;
	}


}

real_t Physics2DServerSW::joint_get_param(RID p_joint,JointParam p_param) const {

	const Joint2DSW *joint = joint_owner.get(p_joint);
	ERR_FAIL_COND_V(!joint,-1);

	switch(p_param) {
		case JOINT_PARAM_BIAS: return joint->get_bias(); break;
		case JOINT_PARAM_MAX_BIAS: return joint->get_max_bias(); break;
		case JOINT_PARAM_MAX_FORCE: return joint->get_max_force(); break;
	}

	return 0;
}


RID Physics2DServerSW::pin_joint_create(const Vector2& p_pos,RID p_body_a,RID p_body_b) {

	Body2DSW *A=body_owner.get(p_body_a);
	ERR_FAIL_COND_V(!A,RID());
	Body2DSW *B=NULL;
	if (body_owner.owns(p_body_b)) {
		B=body_owner.get(p_body_b);
		ERR_FAIL_COND_V(!B,RID());
	}

	Joint2DSW *joint = memnew( PinJoint2DSW(p_pos,A,B) );
	RID self = joint_owner.make_rid(joint);
	joint->set_self(self);

	return self;
}

RID Physics2DServerSW::groove_joint_create(const Vector2& p_a_groove1,const Vector2& p_a_groove2, const Vector2& p_b_anchor, RID p_body_a,RID p_body_b) {


	Body2DSW *A=body_owner.get(p_body_a);
	ERR_FAIL_COND_V(!A,RID());

	Body2DSW *B=body_owner.get(p_body_b);
	ERR_FAIL_COND_V(!B,RID());

	Joint2DSW *joint = memnew( GrooveJoint2DSW(p_a_groove1,p_a_groove2,p_b_anchor,A,B) );
	RID self = joint_owner.make_rid(joint);
	joint->set_self(self);
	return self;


}

RID Physics2DServerSW::damped_spring_joint_create(const Vector2& p_anchor_a,const Vector2& p_anchor_b,RID p_body_a,RID p_body_b) {

	Body2DSW *A=body_owner.get(p_body_a);
	ERR_FAIL_COND_V(!A,RID());

	Body2DSW *B=body_owner.get(p_body_b);
	ERR_FAIL_COND_V(!B,RID());

	Joint2DSW *joint = memnew( DampedSpringJoint2DSW(p_anchor_a,p_anchor_b,A,B) );
	RID self = joint_owner.make_rid(joint);
	joint->set_self(self);
	return self;

}

void Physics2DServerSW::damped_string_joint_set_param(RID p_joint, DampedStringParam p_param, real_t p_value) {


	Joint2DSW *j = joint_owner.get(p_joint);
	ERR_FAIL_COND(!j);
	ERR_FAIL_COND(j->get_type()!=JOINT_DAMPED_SPRING);

	DampedSpringJoint2DSW *dsj = static_cast<DampedSpringJoint2DSW*>(j);
	dsj->set_param(p_param,p_value);
}

real_t Physics2DServerSW::damped_string_joint_get_param(RID p_joint, DampedStringParam p_param) const {

	Joint2DSW *j = joint_owner.get(p_joint);
	ERR_FAIL_COND_V(!j,0);
	ERR_FAIL_COND_V(j->get_type()!=JOINT_DAMPED_SPRING,0);

	DampedSpringJoint2DSW *dsj = static_cast<DampedSpringJoint2DSW*>(j);
	return dsj->get_param(p_param);
}

Physics2DServer::JointType Physics2DServerSW::joint_get_type(RID p_joint) const {


	Joint2DSW *joint = joint_owner.get(p_joint);
	ERR_FAIL_COND_V(!joint,JOINT_PIN);

	return joint->get_type();
}



void Physics2DServerSW::free(RID p_rid) {

	if (shape_owner.owns(p_rid)) {

		Shape2DSW *shape = shape_owner.get(p_rid);

		while(shape->get_owners().size()) {
			ShapeOwner2DSW *so=shape->get_owners().front()->key();
			so->remove_shape(shape);
		}

		shape_owner.free(p_rid);
		memdelete(shape);
	} else if (body_owner.owns(p_rid)) {

		Body2DSW *body = body_owner.get(p_rid);

//		if (body->get_state_query())
//			_clear_query(body->get_state_query());

//		if (body->get_direct_state_query())
//			_clear_query(body->get_direct_state_query());

		body->set_space(NULL);


		while( body->get_shape_count() ) {

			body->remove_shape(0);
		}

		while (body->get_constraint_map().size()) {
			RID self = body->get_constraint_map().front()->key()->get_self();
			ERR_FAIL_COND(!self.is_valid());
			free(self);
		}

		body_owner.free(p_rid);
		memdelete(body);

	} else if (area_owner.owns(p_rid)) {

		Area2DSW *area = area_owner.get(p_rid);

//		if (area->get_monitor_query())
//			_clear_query(area->get_monitor_query());

		area->set_space(NULL);

		while( area->get_shape_count() ) {

			area->remove_shape(0);
		}

		area_owner.free(p_rid);
		memdelete(area);
	} else if (space_owner.owns(p_rid)) {

		Space2DSW *space = space_owner.get(p_rid);

		while(space->get_objects().size()) {
			CollisionObject2DSW *co = (CollisionObject2DSW *)space->get_objects().front()->get();
			co->set_space(NULL);
		}

		active_spaces.erase(space);
		free(space->get_default_area()->get_self());
		space_owner.free(p_rid);
		memdelete(space);
	} else if (joint_owner.owns(p_rid)) {

		Joint2DSW *joint = joint_owner.get(p_rid);

		joint_owner.free(p_rid);
		memdelete(joint);

	} else {

		ERR_EXPLAIN("Invalid ID");
		ERR_FAIL();
	}


};

void Physics2DServerSW::set_active(bool p_active) {

	active=p_active;
};

void Physics2DServerSW::init() {

	doing_sync=true;
	last_step=0.001;
	iterations=8;// 8?
	stepper = memnew( Step2DSW );
	direct_state = memnew( Physics2DDirectBodyStateSW );
};


void Physics2DServerSW::step(float p_step) {


	if (!active)
		return;

	doing_sync=false;

	last_step=p_step;
	Physics2DDirectBodyStateSW::singleton->step=p_step;
	island_count=0;
	active_objects=0;
	collision_pairs=0;
	for( Set<const Space2DSW*>::Element *E=active_spaces.front();E;E=E->next()) {

		stepper->step((Space2DSW*)E->get(),p_step,iterations);
		island_count+=E->get()->get_island_count();
		active_objects+=E->get()->get_active_objects();
		collision_pairs+=E->get()->get_collision_pairs();
	}
};

void Physics2DServerSW::sync() {

};

void Physics2DServerSW::flush_queries() {

	if (!active)
		return;

	doing_sync=true;
	for( Set<const Space2DSW*>::Element *E=active_spaces.front();E;E=E->next()) {

		Space2DSW *space=(Space2DSW *)E->get();
		space->call_queries();
	}

};



void Physics2DServerSW::finish() {

	memdelete(stepper);
	memdelete(direct_state);
};

int Physics2DServerSW::get_process_info(ProcessInfo p_info) {

	switch(p_info) {

		case INFO_ACTIVE_OBJECTS: {

			return active_objects;
		} break;
		case INFO_COLLISION_PAIRS: {
			return collision_pairs;
		} break;
		case INFO_ISLAND_COUNT: {

			return island_count;
		} break;

	}

	return 0;
}


Physics2DServerSW::Physics2DServerSW() {

	BroadPhase2DSW::create_func=BroadPhase2DHashGrid::_create;
//	BroadPhase2DSW::create_func=BroadPhase2DBasic::_create;

	active=true;
	island_count=0;
	active_objects=0;
	collision_pairs=0;

};


Physics2DServerSW::~Physics2DServerSW() {

};