1 files changed, 62 insertions, 0 deletions
diff --git a/floor-mesh.cpp b/floor-mesh.cpp
new file mode 100644
index 00000000..ecbcc8bb
--- /dev/null
+++ b/floor-mesh.cpp
@@ -0,0 +1,62 @@
+#include "floor-mesh.hpp"
+#include "tile-atlas.hpp"
+#include "tile-shader.hpp"
+#include "tile.hpp"
+#include "chunk.hpp"
+
+namespace Magnum::Examples {
+
+floor_mesh::floor_mesh()
+{
+    _floor_mesh.setCount((int)(quad_index_count * _index_data.size()))
+               .addVertexBuffer(_positions_buffer, 0, tile_shader::Position{})
+               .addVertexBuffer(_vertex_buffer, 0, tile_shader::TextureCoordinates{})
+               .setIndexBuffer(_index_buffer, 0, GL::MeshIndexType::UnsignedShort);
+}
+
+void floor_mesh::set_tile(tile& x, const local_coords pt)
+{
+    CORRADE_INTERNAL_ASSERT(x.ground_image);
+
+    constexpr float X = TILE_SIZE[0], Y = TILE_SIZE[1];
+    const auto idx = pt.to_index();
+    auto texcoords = x.ground_image.atlas->texcoords_for_id(x.ground_image.variant);
+    //auto positions = img.atlas->floor_quad(center, { TILE_SIZE[0], TILE_SIZE[1] });
+    for (std::size_t i = 0; i < 4; i++)
+        _vertex_data[idx][i] = { texcoords[i] };
+    x.ground_image.atlas->texture().bind(0); // TODO
+}
+
+void floor_mesh::draw(tile_shader& shader)
+{
+    _vertex_buffer.setData(_vertex_data, Magnum::GL::BufferUsage::DynamicDraw);
+    shader.draw(_floor_mesh);
+}
+
+static auto make_index_array()
+{
+    constexpr auto quad_index_count = std::tuple_size_v<decltype(tile_atlas::indices(0))>;
+    std::array<std::array<UnsignedShort, quad_index_count>, TILE_COUNT> array; // NOLINT(cppcoreguidelines-pro-type-member-init)
+
+    for (std::size_t i = 0, k = 0; i < std::size(array); i++)
+        array[i] = tile_atlas::indices(i);
+    return array;
+}
+
+static auto make_floor_positions_array()
+{
+    std::array<std::array<Vector3, 4>, TILE_COUNT> array;
+    constexpr float X = TILE_SIZE[0], Y = TILE_SIZE[1];
+    for (std::size_t j = 0, k = 0; j < TILE_MAX_DIM; j++)
+        for (std::size_t i = 0; i < TILE_MAX_DIM; i++, k++)
+        {
+            Vector3 center {(float)(X*i), (float)(Y*j), 0};
+            array[k] = { tile_atlas::floor_quad(center, {X, Y}) };
+        }
+    return array;
+}
+
+const auto floor_mesh::_index_data = make_index_array();
+const auto floor_mesh::_position_data = make_floor_positions_array();
+
+} // namespace Magnum::Examples