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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include "../irrlichttypes.h"
#include "../irr_v3d.h"
#include <iostream>
#include <string>
enum PointedThingType
{
POINTEDTHING_NOTHING,
POINTEDTHING_NODE,
POINTEDTHING_OBJECT
};
//! An active object or node which is selected by a ray on the map.
struct PointedThing
{
//! The type of the pointed object.
PointedThingType type = POINTEDTHING_NOTHING;
/*!
* Only valid if type is POINTEDTHING_NODE.
* The coordinates of the node which owns the
* nodebox that the ray hits first.
* This may differ from node_real_undersurface if
* a nodebox exceeds the limits of its node.
*/
v3s16 node_undersurface;
/*!
* Only valid if type is POINTEDTHING_NODE.
* The coordinates of the last node the ray intersects
* before node_undersurface. Same as node_undersurface
* if the ray starts in a nodebox.
*/
v3s16 node_abovesurface;
/*!
* Only valid if type is POINTEDTHING_NODE.
* The coordinates of the node which contains the
* point of the collision and the nodebox of the node.
*/
v3s16 node_real_undersurface;
/*!
* Only valid if type is POINTEDTHING_OBJECT.
* The ID of the object the ray hit.
*/
s16 object_id = -1;
/*!
* Only valid if type isn't POINTEDTHING_NONE.
* First intersection point of the ray and the nodebox.
*/
v3f intersection_point;
/*!
* Only valid if type isn't POINTEDTHING_NONE.
* Normal vector of the intersection.
* This is perpendicular to the face the ray hits,
* points outside of the box and it's length is 1.
*/
v3s16 intersection_normal;
/*!
* Square of the distance between the pointing
* ray's start point and the intersection point.
*/
f32 distanceSq = 0;
//! Constructor for POINTEDTHING_NOTHING
PointedThing() = default;
//! Constructor for POINTEDTHING_NODE
PointedThing(const v3s16 &under, const v3s16 &above,
const v3s16 &real_under, const v3f &point, const v3s16 &normal,
f32 distSq);
//! Constructor for POINTEDTHING_OBJECT
PointedThing(s16 id, const v3f &point, const v3s16 &normal, f32 distSq);
std::string dump() const;
void serialize(std::ostream &os) const;
void deSerialize(std::istream &is);
/*!
* This function ignores the intersection point and normal.
*/
bool operator==(const PointedThing &pt2) const;
bool operator!=(const PointedThing &pt2) const;
};
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