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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
#include "chunk.hpp"
#include "ground-atlas.hpp"
#include "object.hpp"
#include "src/RTree-search.hpp"
#include "src/chunk-scenery.hpp"
#include "src/tile-bbox.hpp"
#include "src/wall-atlas.hpp"
#include <bit>
#include <Corrade/Containers/StructuredBindings.h>
#include <Corrade/Containers/Pair.h>
namespace floormat {
bool collision_data::operator==(const collision_data&) const noexcept = default;
bool chunk::bbox::operator==(const floormat::chunk::bbox& other) const noexcept = default;
chunk::RTree* chunk::rtree() noexcept { ensure_passability(); return &*_rtree; }
namespace {
constexpr collision_data make_id_(collision_type type, pass_mode p, object_id id)
{
return collision_data { (object_id)type, (object_id)p, id };
}
constexpr object_id make_id(collision_type type, pass_mode p, object_id id)
{
return std::bit_cast<object_id>(make_id_(type, p, id));
}
} // namespace
void chunk::ensure_passability() noexcept
{
fm_assert(_objects_sorted); // not strictly necessary
if (!_pass_modified)
return;
_pass_modified = false;
_rtree->RemoveAll();
for (const std::shared_ptr<object>& s : objects())
{
bbox box;
if (_bbox_for_scenery(*s, box))
_add_bbox(box);
}
for (auto i = 0uz; i < TILE_COUNT; i++)
{
if (const auto* atlas = ground_atlas_at(i))
{
auto [min, max] = whole_tile(i);
auto id = make_id(collision_type::geometry, atlas->pass_mode(), i+1);
_rtree->Insert(min.data(), max.data(), id);
}
}
for (auto i = 0uz; i < TILE_COUNT; i++)
{
auto tile = operator[](i);
if (const auto* atlas = tile.wall_north_atlas().get())
{
auto [min, max] = wall_north(i, (float)atlas->info().depth);
auto id = make_id(collision_type::geometry, atlas->info().passability, TILE_COUNT+i+1);
_rtree->Insert(min.data(), max.data(), id);
if (tile.wall_west_atlas().get())
{
auto [min, max] = wall_pillar(i, (float)atlas->info().depth);
_rtree->Insert(min.data(), max.data(), id);
}
}
if (const auto* atlas = tile.wall_west_atlas().get())
{
auto [min, max] = wall_west(i, (float)atlas->info().depth);
auto id = make_id(collision_type::geometry, atlas->info().passability, TILE_COUNT*2+i+1);
_rtree->Insert(min.data(), max.data(), id);
}
}
}
bool chunk::_bbox_for_scenery(const object& s, local_coords local, Vector2b offset, Vector2b bbox_offset, Vector2ub bbox_size, bbox& value) noexcept
{
auto [start, end] = scenery_tile(local, offset, bbox_offset, bbox_size);
auto id = make_id_(collision_type::scenery, s.pass, s.id);
value = { .data = id, .start = start, .end = end };
return s.atlas && !Vector2ui(s.bbox_size).isZero();
}
bool chunk::_bbox_for_scenery(const object& s, bbox& value) noexcept
{
return _bbox_for_scenery(s, s.coord.local(), s.offset, s.bbox_offset, s.bbox_size, value);
}
void chunk::_remove_bbox(const bbox& x)
{
auto start = Vector2(x.start), end = Vector2(x.end);
_rtree->Remove(start.data(), end.data(), std::bit_cast<object_id>(x.data));
}
void chunk::_add_bbox(const bbox& x)
{
auto start = Vector2(x.start), end = Vector2(x.end);
_rtree->Insert(start.data(), end.data(), std::bit_cast<object_id>(x.data));
}
void chunk::_replace_bbox(const bbox& x0, const bbox& x1, bool b0, bool b1)
{
if (_pass_modified)
return;
unsigned i = (unsigned)b1 << 1 | (unsigned)!!b0 << 0;
CORRADE_ASSUME(i < 4u); (void)0;
switch (i)
{
case 1 << 1 | 1 << 0:
if (x1 == x0)
return;
_remove_bbox(x0);
[[fallthrough]];
case 1 << 1 | 0 << 0:
_add_bbox(x1);
return;
case 0 << 1 | 1 << 0:
_remove_bbox(x0);
return;
case 0 << 1 | 0 << 0:
return;
default:
break;
}
std::unreachable();
}
bool chunk::can_place_object(const object_proto& proto, local_coords pos)
{
(void)ensure_scenery_mesh();
switch (proto.pass)
{
default:
case pass_mode::blocked:
case pass_mode::see_through:
break;
case pass_mode::pass:
case pass_mode::shoot_through:
return true;
}
if (!proto.bbox_size.x() || proto.bbox_size.y())
return true;
auto bbox_size = Vector2i(proto.bbox_size);
if (bbox_size.x() > 1)
bbox_size.x() -= 1;
if (bbox_size.y() > 1)
bbox_size.y() -= 1;
const auto center = Vector2(pos)*TILE_SIZE2 + Vector2(proto.offset) + Vector2(proto.bbox_offset),
min = center - Vector2(bbox_size)*.5f, max = min + Vector2(bbox_size);
bool ret = true;
_rtree->Search(min.data(), max.data(), [&](uint64_t data, const auto&) {
[[maybe_unused]] auto x = std::bit_cast<collision_data>(data);
if (x.pass == (uint64_t)pass_mode::pass || x.pass == (uint64_t)pass_mode::shoot_through)
return true;
return ret = false;
});
return ret;
}
} // namespace floormat
|
