1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
Minetest
Copyright (C) 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.
*/
#ifndef COLLISION_HEADER
#define COLLISION_HEADER
#include "irrlichttypes_bloated.h"
#include <vector>
class Map;
class IGameDef;
class Environment;
class ActiveObject;
enum CollisionType
{
COLLISION_NODE,
COLLISION_OBJECT,
};
struct CollisionInfo
{
enum CollisionType type;
v3s16 node_p; // COLLISION_NODE
bool bouncy;
v3f old_speed;
v3f new_speed;
CollisionInfo():
type(COLLISION_NODE),
node_p(-32768,-32768,-32768),
bouncy(false),
old_speed(0,0,0),
new_speed(0,0,0)
{}
};
struct collisionMoveResult
{
bool touching_ground;
bool collides;
bool collides_xz;
bool standing_on_unloaded;
std::vector<CollisionInfo> collisions;
collisionMoveResult():
touching_ground(false),
collides(false),
collides_xz(false),
standing_on_unloaded(false)
{}
};
// Moves using a single iteration; speed should not exceed pos_max_d/dtime
collisionMoveResult collisionMoveSimple(Environment *env,IGameDef *gamedef,
f32 pos_max_d, const aabb3f &box_0,
f32 stepheight, f32 dtime,
v3f &pos_f, v3f &speed_f,
v3f &accel_f,ActiveObject* self=0,
bool collideWithObjects=true);
#if 0
// This doesn't seem to work and isn't used
// Moves using as many iterations as needed
collisionMoveResult collisionMovePrecise(Map *map, IGameDef *gamedef,
f32 pos_max_d, const aabb3f &box_0,
f32 stepheight, f32 dtime,
v3f &pos_f, v3f &speed_f, v3f &accel_f);
#endif
// Helper function:
// Checks for collision of a moving aabbox with a static aabbox
// Returns -1 if no collision, 0 if X collision, 1 if Y collision, 2 if Z collision
// dtime receives time until first collision, invalid if -1 is returned
int axisAlignedCollision(
const aabb3f &staticbox, const aabb3f &movingbox,
const v3f &speed, f32 d, f32 &dtime);
// Helper function:
// Checks if moving the movingbox up by the given distance would hit a ceiling.
bool wouldCollideWithCeiling(
const std::vector<aabb3f> &staticboxes,
const aabb3f &movingbox,
f32 y_increase, f32 d);
#endif
|
