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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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