100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/*
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Minetest-c55
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Copyright (C) 2010 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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#ifndef COLLISION_HEADER
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#define COLLISION_HEADER
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#include "irrlichttypes_bloated.h"
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#include <vector>
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class Map;
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class IGameDef;
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enum CollisionType
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{
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COLLISION_NODE
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};
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struct CollisionInfo
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{
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enum CollisionType type;
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v3s16 node_p; // COLLISION_NODE
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bool bouncy;
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v3f old_speed;
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v3f new_speed;
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CollisionInfo():
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type(COLLISION_NODE),
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node_p(-32768,-32768,-32768),
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bouncy(false),
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old_speed(0,0,0),
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new_speed(0,0,0)
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{}
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};
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struct collisionMoveResult
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{
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bool touching_ground;
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bool collides;
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bool collides_xz;
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bool standing_on_unloaded;
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std::vector<CollisionInfo> collisions;
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collisionMoveResult():
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touching_ground(false),
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collides(false),
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collides_xz(false),
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standing_on_unloaded(false)
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{}
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};
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// Moves using a single iteration; speed should not exceed pos_max_d/dtime
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collisionMoveResult collisionMoveSimple(Map *map, IGameDef *gamedef,
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f32 pos_max_d, const aabb3f &box_0,
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f32 stepheight, f32 dtime,
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v3f &pos_f, v3f &speed_f, v3f &accel_f);
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#if 0
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// This doesn't seem to work and isn't used
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// Moves using as many iterations as needed
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collisionMoveResult collisionMovePrecise(Map *map, IGameDef *gamedef,
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f32 pos_max_d, const aabb3f &box_0,
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f32 stepheight, f32 dtime,
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v3f &pos_f, v3f &speed_f, v3f &accel_f);
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#endif
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// Helper function:
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// Checks for collision of a moving aabbox with a static aabbox
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// Returns -1 if no collision, 0 if X collision, 1 if Y collision, 2 if Z collision
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// dtime receives time until first collision, invalid if -1 is returned
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int axisAlignedCollision(
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const aabb3f &staticbox, const aabb3f &movingbox,
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const v3f &speed, f32 d, f32 &dtime);
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// Helper function:
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// Checks if moving the movingbox up by the given distance would hit a ceiling.
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bool wouldCollideWithCeiling(
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const std::vector<aabb3f> &staticboxes,
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const aabb3f &movingbox,
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f32 y_increase, f32 d);
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#endif
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