forked from Mirrorlandia_minetest/minetest
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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#include "../irrlichttypes.h"
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#include "../irr_v3d.h"
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#include <iostream>
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#include <string>
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enum PointedThingType
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{
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POINTEDTHING_NOTHING,
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POINTEDTHING_NODE,
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POINTEDTHING_OBJECT
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};
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//! An active object or node which is selected by a ray on the map.
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struct PointedThing
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{
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//! The type of the pointed object.
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PointedThingType type = POINTEDTHING_NOTHING;
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/*!
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* Only valid if type is POINTEDTHING_NODE.
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* The coordinates of the node which owns the
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* nodebox that the ray hits first.
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* This may differ from node_real_undersurface if
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* a nodebox exceeds the limits of its node.
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*/
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v3s16 node_undersurface;
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/*!
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* Only valid if type is POINTEDTHING_NODE.
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* The coordinates of the last node the ray intersects
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* before node_undersurface. Same as node_undersurface
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* if the ray starts in a nodebox.
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*/
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v3s16 node_abovesurface;
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/*!
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* Only valid if type is POINTEDTHING_NODE.
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* The coordinates of the node which contains the
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* point of the collision and the nodebox of the node.
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*/
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v3s16 node_real_undersurface;
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/*!
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* Only valid if type is POINTEDTHING_OBJECT.
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* The ID of the object the ray hit.
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*/
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s16 object_id = -1;
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/*!
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* Only valid if type isn't POINTEDTHING_NONE.
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* First intersection point of the ray and the nodebox.
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*/
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v3f intersection_point;
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/*!
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* Only valid if type isn't POINTEDTHING_NONE.
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* Normal vector of the intersection.
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* This is perpendicular to the face the ray hits,
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* points outside of the box and it's length is 1.
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*/
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v3s16 intersection_normal;
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/*!
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* Square of the distance between the pointing
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* ray's start point and the intersection point.
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*/
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f32 distanceSq = 0;
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//! Constructor for POINTEDTHING_NOTHING
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PointedThing() {};
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//! Constructor for POINTEDTHING_NODE
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PointedThing(const v3s16 &under, const v3s16 &above,
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const v3s16 &real_under, const v3f &point, const v3s16 &normal,
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f32 distSq);
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//! Constructor for POINTEDTHING_OBJECT
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PointedThing(s16 id, const v3f &point, const v3s16 &normal, f32 distSq);
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std::string dump() const;
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void serialize(std::ostream &os) const;
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void deSerialize(std::istream &is);
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/*!
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* This function ignores the intersection point and normal.
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*/
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bool operator==(const PointedThing &pt2) const;
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bool operator!=(const PointedThing &pt2) const;
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};
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