From 1cc08c51eb4b0f95c30c0a98ad1fc5ad3459b2df Mon Sep 17 00:00:00 2001
From: Nicolas James <Eele1Ephe7uZahRie@tutanota.com>
Date: Wed, 12 Feb 2025 18:05:18 +1100
Subject: initial commit

---
 src/server/world.cc | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/server/world.cc

(limited to 'src/server/world.cc')

diff --git a/src/server/world.cc b/src/server/world.cc
new file mode 100644
index 0000000..6527d6c
--- /dev/null
+++ b/src/server/world.cc
@@ -0,0 +1,53 @@
+#include "server/world.hh"
+
+namespace server {
+namespace world {
+
+proto::packet chunk::make_chunk_packet() const noexcept {
+
+    proto::packet ret_packet;
+
+    auto chunk_packet = ret_packet.mutable_chunk_packet();
+
+    auto chunk_pos = chunk_packet->mutable_chunk_pos();
+    const shared::math::coords this_chunk_pos = this->get_pos();
+    chunk_pos->set_x(this_chunk_pos.x);
+    chunk_pos->set_z(this_chunk_pos.z);
+
+    // Since protobuf can store at minimum uint32, we mash four of our
+    // uint_8 chunk blocks into a single uint32.
+    static_assert(shared::world::chunk::VOLUME % 4 == 0);
+    for (unsigned i = 0u; i < shared::world::chunk::VOLUME / 4u; ++i) {
+        std::uint32_t packed_blocks = 0u;
+
+        for (unsigned j = 0; j < 4; ++j) {
+            const auto block =
+                static_cast<std::uint8_t>(this->blocks[i * 4 + j].type);
+            packed_blocks |= static_cast<unsigned>(block << j * 8);
+        }
+
+        chunk_packet->add_blocks(packed_blocks);
+    }
+
+    return ret_packet;
+}
+
+static std::optional<shared::world::chunk::block_array>
+maybe_get_blocks(const shared::math::coords& coords) {
+    const auto chunk = database::maybe_read_chunk(coords);
+    if (!chunk.has_value()) {
+        return std::nullopt;
+    }
+    return shared::world::chunk::make_blocks_from_chunk(chunk.value());
+}
+
+chunk::chunk(const std::uint64_t& seed,
+             const shared::math::coords& coords) noexcept
+    : shared::world::chunk(seed, coords, maybe_get_blocks(coords)) {
+    this->update();
+}
+
+chunk::~chunk() noexcept { this->write(); }
+
+} // namespace world
+} // namespace server
-- 
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