raycast.h

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/*
Minetest
Copyright (C) 2016 juhdanad, Daniel Juhasz <juhdanad@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 "voxelalgorithms.h"
#include "util/pointedthing.h"
 
struct RaycastSort
{
    bool operator() (const PointedThing &pt1, const PointedThing &pt2) const;
};
 
class RaycastState
{
public:
    RaycastState(const core::line3d<f32> &shootline, bool objects_pointable,
        bool liquids_pointable, const std::optional<Pointabilities> &pointabilities);
 
    core::line3d<f32> m_shootline;
    voxalgo::VoxelLineIterator m_iterator;
    v3s16 m_previous_node;
 
    std::priority_queue<PointedThing, std::vector<PointedThing>, RaycastSort> m_found;
 
    bool m_objects_pointable;
    bool m_liquids_pointable;
    const std::optional<Pointabilities> m_pointabilities;
 
    core::aabbox3d<s16> m_search_range { 0, 0, 0, 0, 0, 0 };
 
    bool m_initialization_needed = true;
};
 
bool boxLineCollision(const aabb3f &box, v3f start, v3f dir,
    v3f *collision_point, v3f *collision_normal);
 
bool boxLineCollision(const aabb3f &box, v3f box_rotation,
    v3f start, v3f dir,
    v3f *collision_point, v3f *collision_normal, v3f *raw_collision_normal);