/*************************************************************************/
/*  capsule_shape_2d.cpp                                                 */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* 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 "capsule_shape_2d.h"

#include "servers/physics_2d_server.h"
#include "servers/visual_server.h"

Vector<Vector2> CapsuleShape2D::_get_points() const {

	Vector<Vector2> points;
	for (int i = 0; i < 24; i++) {
		Vector2 ofs = Vector2(0, (i > 6 && i <= 18) ? -get_height() * 0.5 : get_height() * 0.5);

		points.push_back(Vector2(Math::sin(i * Math_PI * 2 / 24.0), Math::cos(i * Math_PI * 2 / 24.0)) * get_radius() + ofs);
		if (i == 6 || i == 18)
			points.push_back(Vector2(Math::sin(i * Math_PI * 2 / 24.0), Math::cos(i * Math_PI * 2 / 24.0)) * get_radius() - ofs);
	}

	return points;
}

bool CapsuleShape2D::_edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const {

	return Geometry::is_point_in_polygon(p_point, _get_points());
}

void CapsuleShape2D::_update_shape() {

	Physics2DServer::get_singleton()->shape_set_data(get_rid(), Vector2(radius, height));
	emit_changed();
}

void CapsuleShape2D::set_radius(real_t p_radius) {

	radius = p_radius;
	_update_shape();
}

real_t CapsuleShape2D::get_radius() const {

	return radius;
}

void CapsuleShape2D::set_height(real_t p_height) {

	height = p_height;
	if (height < 0)
		height = 0;

	_update_shape();
}

real_t CapsuleShape2D::get_height() const {

	return height;
}

void CapsuleShape2D::draw(const RID &p_to_rid, const Color &p_color) {

	Vector<Vector2> points = _get_points();
	Vector<Color> col;
	col.push_back(p_color);
	VisualServer::get_singleton()->canvas_item_add_polygon(p_to_rid, points, col);
	if (is_collision_outline_enabled()) {
		VisualServer::get_singleton()->canvas_item_add_polyline(p_to_rid, points, col, 1.0, true);
		// Draw the last segment as it's not drawn by `canvas_item_add_polyline()`.
		VisualServer::get_singleton()->canvas_item_add_line(p_to_rid, points[points.size() - 1], points[0], p_color, 1.0, true);
	}
}

Rect2 CapsuleShape2D::get_rect() const {

	Vector2 he = Point2(get_radius(), get_radius() + get_height() * 0.5);
	Rect2 rect;
	rect.position = -he;
	rect.size = he * 2.0;
	return rect;
}

void CapsuleShape2D::_bind_methods() {

	ClassDB::bind_method(D_METHOD("set_radius", "radius"), &CapsuleShape2D::set_radius);
	ClassDB::bind_method(D_METHOD("get_radius"), &CapsuleShape2D::get_radius);

	ClassDB::bind_method(D_METHOD("set_height", "height"), &CapsuleShape2D::set_height);
	ClassDB::bind_method(D_METHOD("get_height"), &CapsuleShape2D::get_height);

	ADD_PROPERTY(PropertyInfo(Variant::REAL, "radius"), "set_radius", "get_radius");
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "height"), "set_height", "get_height");
}

CapsuleShape2D::CapsuleShape2D() :
		Shape2D(Physics2DServer::get_singleton()->capsule_shape_create()) {

	radius = 10;
	height = 20;
	_update_shape();
}
