blob: 5e645b0fdae110aa4b425ae1eef20ed7cfd8c78b (
plain)
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
|
#include "floor.hpp"
#include "shaders/tile.hpp"
#include "tile.hpp"
#include "chunk.hpp"
#include "tile-atlas.hpp"
#include <Magnum/GL/MeshView.h>
namespace floormat {
floor_mesh::floor_mesh() = default;
//#define FM_DEBUG_DRAW_COUNT
void floor_mesh::draw(tile_shader& shader, chunk& c)
{
constexpr auto quad_index_count = 6;
auto [mesh_, ids] = c.ensure_ground_mesh();
struct { tile_atlas* atlas = nullptr; std::size_t pos = 0; } last;
GL::MeshView mesh{mesh_};
[[maybe_unused]] std::size_t draw_count = 0;
const auto do_draw = [&](std::size_t i, tile_atlas* atlas) {
if (atlas == last.atlas)
return;
if (auto len = i - last.pos; last.atlas && len > 0)
{
last.atlas->texture().bind(0);
mesh.setCount((int)(quad_index_count * len));
mesh.setIndexRange((int)(last.pos*quad_index_count), 0, quad_index_count*TILE_COUNT - 1);
shader.draw(mesh);
draw_count++;
}
last = { atlas, i };
};
for (std::size_t k = 0; k < TILE_COUNT; k++)
do_draw(k, c.ground_atlas_at(ids[k]));
do_draw(TILE_COUNT, nullptr);
#ifdef FM_DEBUG_DRAW_COUNT
if (draw_count)
fm_debug("floor draws: %zu", draw_count);
#endif
}
} // namespace floormat
|
