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
|
#include "app.hpp"
#include "src/tile-constants.hpp"
#include "src/global-coords.hpp"
#include "shaders/shader.hpp"
#include "floormat/main.hpp"
#include "src/RTree-search.hpp"
#include "src/object.hpp"
#include "src/world.hpp"
#include "src/camera-offset.hpp"
#include "compat/enum-bitset.hpp"
#include <bit>
#include <Magnum/Math/Functions.h>
namespace floormat {
void app::do_camera(float dt, const key_set& cmds, int mods)
{
if (cmds[key_camera_reset])
{
reset_camera_offset();
update_cursor_tile(cursor.pixel);
do_mouse_move(mods);
return;
}
Vector2d dir{};
if (cmds[key_camera_up])
dir += Vector2d{0, -1};
else if (cmds[key_camera_down])
dir += Vector2d{0, 1};
if (cmds[key_camera_left])
dir += Vector2d{-1, 0};
else if (cmds[key_camera_right])
dir += Vector2d{1, 0};
if (dir != Vector2d{})
{
auto& shader = M->shader();
const auto sz = M->window_size();
constexpr double screens_per_second = 0.75;
const double pixels_per_second = sz.length() / screens_per_second;
auto camera_offset = shader.camera_offset();
const auto max_camera_offset = Vector2d(sz * 10);
camera_offset -= dir.normalized() * (double)dt * pixels_per_second;
camera_offset = Math::clamp(camera_offset, -max_camera_offset, max_camera_offset);
shader.set_camera_offset(camera_offset, shader.depth_offset());
update_cursor_tile(cursor.pixel);
do_mouse_move(mods);
}
}
void app::reset_camera_offset()
{
constexpr Vector3d size = TILE_MAX_DIM20d*dTILE_SIZE*-.5;
constexpr auto projected = tile_shader::project(size);
M->shader().set_camera_offset(projected, 0);
_z_level = 0;
update_cursor_tile(cursor.pixel);
}
object_id app::get_object_colliding_with_cursor()
{
const auto [minx, maxx, miny, maxy] = M->get_draw_bounds();
const auto sz = M->window_size();
auto& world = M->world();
auto& shader = M->shader();
using rtree_type = std::decay_t<decltype(*world[chunk_coords_{}].rtree())>;
using rect_type = typename rtree_type::Rect;
if (cursor.pixel)
{
auto pos = tile_shader::project(Vector3d{0., 0., -_z_level*dTILE_SIZE[2]});
auto pixel = Vector2d{*cursor.pixel} + pos;
auto coord = M->pixel_to_tile(pixel);
auto tile = global_coords{coord.chunk(), coord.local(), 0};
constexpr auto eps = 1e-6f;
constexpr auto m = TILE_SIZE2 * Vector2(1- eps, 1- eps);
const auto tile_ = Vector2(M->pixel_to_tile_(Vector2d(pixel)));
const auto curchunk = Vector2(tile.chunk()), curtile = Vector2(tile.local());
const auto subpixel_ = Math::fmod(tile_, 1.f);
const auto subpixel = m * Vector2(curchunk[0] < 0 ? 1 + subpixel_[0] : subpixel_[0],
curchunk[1] < 0 ? 1 + subpixel_[1] : subpixel_[1]);
for (int16_t y = miny; y <= maxy; y++)
for (int16_t x = minx; x <= maxx; x++)
{
const chunk_coords_ c_pos{x, y, _z_level};
auto* c_ = world.at(c_pos);
if (!c_)
continue;
auto& c = *c_;
c.ensure_passability();
const with_shifted_camera_offset o{shader, c_pos, {minx, miny}, {maxx, maxy}};
if (floormat_main::check_chunk_visible(shader.camera_offset(), sz))
{
constexpr auto half_tile = TILE_SIZE2/2;
constexpr auto chunk_size = TILE_SIZE2 * TILE_MAX_DIM;
auto chunk_dist = (curchunk - Vector2(c_pos.x, c_pos.y))*chunk_size;
auto t0 = chunk_dist + curtile*TILE_SIZE2 + subpixel - half_tile;
auto t1 = t0+Vector2(1e-4f);
const auto* rtree = c.rtree();
object_id ret = 0;
rtree->Search(t0.data(), t1.data(), [&](uint64_t data, const rect_type& rect) {
[[maybe_unused]] auto x = std::bit_cast<collision_data>(data);
if (x.tag == (uint64_t)collision_type::geometry)
return true;
Vector2 min(rect.m_min[0], rect.m_min[1]), max(rect.m_max[0], rect.m_max[1]);
if (t0 >= min && t0 <= max)
{
if (auto e_ = world.find_object(x.data);
e_ && Vector2ui(e_->bbox_size).product() != 0)
{
ret = x.data;
return false;
}
}
return true;
});
if (ret)
return ret;
}
}
}
return 0;
}
void app::update_cursor_tile(const Optional<Vector2i>& pixel)
{
cursor.pixel = pixel;
// assert_invariant !!cursor.tile == !!cursor.subpixel;
if (pixel)
{
auto coord = M->pixel_to_tile(Vector2d{*pixel});
auto tile = global_coords{coord.chunk(), coord.local(), _z_level};
cursor.tile = tile;
const auto tile_ = Vector2(M->pixel_to_tile_(Vector2d(*pixel)));
const auto curchunk = Vector2(tile.chunk());
const auto subpixel_ = Math::fmod(tile_, 1.f);
auto subpixel = TILE_SIZE2 * Vector2(curchunk.x() < 0 ? 1 + subpixel_.x() : subpixel_.x(),
curchunk.y() < 0 ? 1 + subpixel_.y() : subpixel_.y());
constexpr auto half_tile = Vector2(iTILE_SIZE2/2);
subpixel -= half_tile;
subpixel = Math::clamp(Math::round(subpixel), -half_tile, half_tile-Vector2{1.f});
cursor.subpixel = Vector2b(subpixel);
}
else
{
cursor.tile = NullOpt;
cursor.subpixel = NullOpt;
}
}
Vector2 app::point_screen_pos(point pt)
{
auto& shader = M->shader();
auto win_size = M->window_size();
auto c3 = pt.chunk3();
auto c2 = pt.chunk();
with_shifted_camera_offset co{shader, c3, c2, c2 };
auto world_pos = TILE_SIZE20 * Vector3(pt.local()) + Vector3(Vector2(pt.offset()), 0);
return Vector2(shader.camera_offset()) + Vector2(win_size)*.5f + shader.project(world_pos);
}
} // namespace floormat
|
