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
|
#include "chunk.hpp"
#include "tile-atlas.hpp"
#include "shaders/tile.hpp"
#include <algorithm>
#include <Corrade/Containers/ArrayViewStl.h>
#include <Magnum/GL/Buffer.h>
namespace floormat {
bool chunk::empty(bool force) const noexcept
{
if (!force && !_maybe_empty)
return false;
for (std::size_t i = 0; i < TILE_COUNT; i++)
{
if (_ground_atlases[i] || _wall_north_atlases[i] || _wall_west_atlases[i])
{
_maybe_empty = false;
return false;
}
}
return true;
}
tile_atlas* chunk::ground_atlas_at(std::size_t i) const noexcept
{
return _ground_atlases[i].get();
}
static constexpr auto make_index_array()
{
std::array<std::array<UnsignedShort, 6>, TILE_COUNT> array;
for (std::size_t i = 0; i < TILE_COUNT; i++)
array[i] = tile_atlas::indices(i);
return array;
}
auto chunk::ensure_ground_mesh() noexcept -> mesh_tuple
{
if (!_ground_modified)
return { ground_mesh, ground_indexes };
_ground_modified = false;
for (std::size_t i = 0; i < TILE_COUNT; i++)
ground_indexes[i] = std::uint8_t(i);
std::sort(ground_indexes.begin(), ground_indexes.end(), [this](std::uint8_t a, std::uint8_t b) {
return _ground_atlases[a].get() < _ground_atlases[b].get();
});
struct vertex {
Vector3 position;
Vector2 texcoords;
};
std::array<std::array<vertex, 4>, TILE_COUNT> vertexes;
for (std::size_t k = 0; k < TILE_COUNT; k++)
{
const std::uint8_t i = ground_indexes[k];
if (auto atlas = _ground_atlases[i]; !atlas)
vertexes[k] = {};
else
{
const std::uint8_t x = i % TILE_MAX_DIM, y = i / TILE_MAX_DIM;
auto quad = atlas->floor_quad(Vector3(x, y, 0) * TILE_SIZE, TILE_SIZE2);
auto texcoords = atlas->texcoords_for_id(_ground_variants[i] % atlas->num_tiles());
auto& v = vertexes[k];
for (std::size_t j = 0; j < 4; j++)
v[j] = { quad[j], texcoords[j] };
}
}
constexpr auto indexes = make_index_array();
GL::Mesh mesh{GL::MeshPrimitive::Triangles};
mesh.addVertexBuffer(GL::Buffer{vertexes}, 0, tile_shader::Position{}, tile_shader::TextureCoordinates{})
.setIndexBuffer(GL::Buffer{indexes}, 0, GL::MeshIndexType::UnsignedShort)
.setCount(6 * TILE_COUNT);
ground_mesh = Utility::move(mesh);
return { ground_mesh, ground_indexes };
}
chunk::chunk() noexcept // NOLINT(modernize-use-equals-default)
{
//fm_debug("chunk ctor");
}
tile_ref chunk::operator[](std::size_t idx) noexcept { return { *this, std::uint8_t(idx) }; }
tile_proto chunk::operator[](std::size_t idx) const noexcept { return tile_proto(tile_ref { *const_cast<chunk*>(this), std::uint8_t(idx) }); }
tile_ref chunk::operator[](local_coords xy) noexcept { return operator[](xy.to_index()); }
tile_proto chunk::operator[](local_coords xy) const noexcept { return operator[](xy.to_index()); }
auto chunk::begin() noexcept -> iterator { return iterator { *this, 0 }; }
auto chunk::end() noexcept -> iterator { return iterator { *this, TILE_COUNT }; }
auto chunk::cbegin() const noexcept -> const_iterator { return const_iterator { *this, 0 }; }
auto chunk::cend() const noexcept -> const_iterator { return const_iterator { *this, TILE_COUNT }; }
auto chunk::begin() const noexcept -> const_iterator { return cbegin(); }
auto chunk::end() const noexcept -> const_iterator { return cend(); }
chunk::chunk(chunk&&) noexcept = default;
chunk& chunk::operator=(chunk&&) noexcept = default;
void chunk::mark_modified() noexcept
{
_ground_modified = true;
}
bool chunk::is_modified() const noexcept
{
return _ground_modified;
}
} // namespace floormat
|
