/*************************************************************************/
/*  area_pair_sw.cpp                                                     */
/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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#include "area_pair_sw.h"
#include "collision_solver_sw.h"

bool AreaPairSW::setup(real_t p_step) {

	bool result = false;

	if (area->is_shape_set_as_disabled(area_shape) || body->is_shape_set_as_disabled(body_shape)) {
		result = false;
	} else if (area->test_collision_mask(body) && CollisionSolverSW::solve_static(body->get_shape(body_shape), body->get_transform() * body->get_shape_transform(body_shape), area->get_shape(area_shape), area->get_transform() * area->get_shape_transform(area_shape), NULL, this)) {
		result = true;
	}

	if (result != colliding) {

		if (result) {

			if (area->get_space_override_mode() != PhysicsServer::AREA_SPACE_OVERRIDE_DISABLED)
				body->add_area(area);
			if (area->has_monitor_callback())
				area->add_body_to_query(body, body_shape, area_shape);

		} else {

			if (area->get_space_override_mode() != PhysicsServer::AREA_SPACE_OVERRIDE_DISABLED)
				body->remove_area(area);
			if (area->has_monitor_callback())
				area->remove_body_from_query(body, body_shape, area_shape);
		}

		colliding = result;
	}

	return false; //never do any post solving
}

void AreaPairSW::solve(real_t p_step) {
}

AreaPairSW::AreaPairSW(BodySW *p_body, int p_body_shape, AreaSW *p_area, int p_area_shape) {

	body = p_body;
	area = p_area;
	body_shape = p_body_shape;
	area_shape = p_area_shape;
	colliding = false;
	body->add_constraint(this, 0);
	area->add_constraint(this);
	if (p_body->get_mode() == PhysicsServer::BODY_MODE_KINEMATIC)
		p_body->set_active(true);
}

AreaPairSW::~AreaPairSW() {

	if (colliding) {

		if (area->get_space_override_mode() != PhysicsServer::AREA_SPACE_OVERRIDE_DISABLED)
			body->remove_area(area);
		if (area->has_monitor_callback())
			area->remove_body_from_query(body, body_shape, area_shape);
	}
	body->remove_constraint(this);
	area->remove_constraint(this);
}

////////////////////////////////////////////////////

bool Area2PairSW::setup(real_t p_step) {

	bool result = false;
	if (area_a->is_shape_set_as_disabled(shape_a) || area_b->is_shape_set_as_disabled(shape_b)) {
		result = false;
	} else if (area_a->test_collision_mask(area_b) && CollisionSolverSW::solve_static(area_a->get_shape(shape_a), area_a->get_transform() * area_a->get_shape_transform(shape_a), area_b->get_shape(shape_b), area_b->get_transform() * area_b->get_shape_transform(shape_b), NULL, this)) {
		result = true;
	}

	if (result != colliding) {

		if (result) {

			if (area_b->has_area_monitor_callback() && area_a->is_monitorable())
				area_b->add_area_to_query(area_a, shape_a, shape_b);

			if (area_a->has_area_monitor_callback() && area_b->is_monitorable())
				area_a->add_area_to_query(area_b, shape_b, shape_a);

		} else {

			if (area_b->has_area_monitor_callback() && area_a->is_monitorable())
				area_b->remove_area_from_query(area_a, shape_a, shape_b);

			if (area_a->has_area_monitor_callback() && area_b->is_monitorable())
				area_a->remove_area_from_query(area_b, shape_b, shape_a);
		}

		colliding = result;
	}

	return false; //never do any post solving
}

void Area2PairSW::solve(real_t p_step) {
}

Area2PairSW::Area2PairSW(AreaSW *p_area_a, int p_shape_a, AreaSW *p_area_b, int p_shape_b) {

	area_a = p_area_a;
	area_b = p_area_b;
	shape_a = p_shape_a;
	shape_b = p_shape_b;
	colliding = false;
	area_a->add_constraint(this);
	area_b->add_constraint(this);
}

Area2PairSW::~Area2PairSW() {

	if (colliding) {

		if (area_b->has_area_monitor_callback())
			area_b->remove_area_from_query(area_a, shape_a, shape_b);

		if (area_a->has_area_monitor_callback())
			area_a->remove_area_from_query(area_b, shape_b, shape_a);
	}

	area_a->remove_constraint(this);
	area_b->remove_constraint(this);
}
