OpenMiner/server/source/world/ServerWorld.cpp

/*
 * =====================================================================================
 *
 *       Filename:  ServerWorld.cpp
 *
 *    Description:
 *
 *        Created:  12/01/2019 14:02:22
 *
 *         Author:  Quentin Bazin, <quent42340@gmail.com>
 *
 * =====================================================================================
 */
#include <gk/core/GameClock.hpp>

#include "Config.hpp"
#include "Network.hpp"
#include "Server.hpp"
#include "ServerPlayer.hpp"
#include "ServerWorld.hpp"

ServerWorld::ServerWorld() {
}

void ServerWorld::update(Server &server, std::unordered_map<u16, ServerPlayer> &players) {
	// if (m_lastTick < gk::GameClock::getTicks() / 50) {
	// 	m_lastTick = gk::GameClock::getTicks() / 50;
    //
	// 	for (auto &it : m_chunks) {
	// 		it.second->tick(players, *this, server);
    //
	// 		it.second->updateLights();
    //
	// 		if (it.second->isGenerated() && !it.second->isSent()) {
	// 			for (auto &client : server.info().clients())
	// 				sendChunkData(client, it.second.get());
    //
	// 			DEBUG("Chunk updated at", it.second->x(), it.second->y(), it.second->z());
	// 		}
	// 	}
	// }
}

void ServerWorld::sendSpawnData(Client &client, ServerPlayer &player) {
	// Player chunk pos
	int pcx = std::floor(player.x() / CHUNK_WIDTH);
	int pcy = std::floor(player.y() / CHUNK_HEIGHT);
	int pcz = std::floor(player.z() / CHUNK_DEPTH);

	// Create a chunk at the current player position
	auto it = m_chunks.emplace(gk::Vector3i{pcx, pcy, pcz}, new ServerChunk(pcx, pcy, pcz));
	ServerChunk *chunk = it.first->second.get();
	// chunk->generate();

	// Load surrounding chunks, starting from the one we generated above
	std::queue<ServerChunk*> chunks;
	// std::queue<ServerChunk*> chunksToSend;
	chunks.emplace(chunk);
	while (!chunks.empty()) {
		ServerChunk *chunk = chunks.front();
		chunks.pop();

		DEBUG("Processing chunk in queue at", chunk->x(), chunk->y(), chunk->z());

		chunk->generate();
		chunk->updateLights();
		sendChunkData(client, chunk);

		// chunksToSend.emplace(chunk);

		gk::Vector3i surroundingChunks[6] = {
			{chunk->x() - 1, chunk->y(),     chunk->z()},
			{chunk->x() + 1, chunk->y(),     chunk->z()},
			{chunk->x(),     chunk->y(),     chunk->z() - 1},
			{chunk->x(),     chunk->y(),     chunk->z() + 1},
			{chunk->x(),     chunk->y() - 1, chunk->z()},
			{chunk->x(),     chunk->y() + 1, chunk->z()},
		};

		for (u8 i = 0 ; i < 6 ; ++i) {
			// Check if this neighbour already exists, if yes then skip it
			ServerChunk *neighbour = (ServerChunk *)getChunk(surroundingChunks[i].x, surroundingChunks[i].y, surroundingChunks[i].z);
			if (neighbour) {
				// Assign surrounding chunk pointers
				chunk->setSurroundingChunk(i, neighbour);
				neighbour->setSurroundingChunk((i % 2 == 0) ? i + 1 : i - 1, chunk);

				continue;
			}

			// Create our neighbour
			auto it = m_chunks.emplace(
				gk::Vector3i{
					surroundingChunks[i].x,
					surroundingChunks[i].y,
					surroundingChunks[i].z
				},
				new ServerChunk{
					surroundingChunks[i].x,
					surroundingChunks[i].y,
					surroundingChunks[i].z
				}
			);

			// Get the created neighbour
			neighbour = it.first->second.get();
			// neighbour->generate();

			// Assign surrounding chunk pointers
			chunk->setSurroundingChunk(i, neighbour);
			neighbour->setSurroundingChunk((i % 2 == 0) ? i + 1 : i - 1, chunk);

			// Compute distance to player chunk
			int dx = std::abs(surroundingChunks[i].x - pcx);
			int dy = std::abs(surroundingChunks[i].y - pcy);
			int dz = std::abs(surroundingChunks[i].z - pcz);
			int distance = std::max(dx, std::max(dy, dz)); // FIXME

			// If the chunk is close enough, add it to the queue
			if (distance < Config::renderDistance)
				chunks.emplace(neighbour);
		}

		// Update lights in our chunk
		// chunk->updateLights();

		// Send the chunk to the client
		// sendChunkData(client, chunk);
	}

	// while (!chunksToSend.empty()) {
	// 	ServerChunk *chunk = chunksToSend.front();
	// 	chunksToSend.pop();
    //
	// 	DEBUG("Processing chunk in queue at", chunk->x(), chunk->y(), chunk->z());
    //
	// 	if (chunk->areAllNeighboursLoaded()) {
	// 	}
	// }
}

void ServerWorld::sendChunkData(Client &client, ServerChunk *chunk) {
	sf::Packet packet;
	packet << Network::Command::ChunkData;
	packet << chunk->x() << chunk->y() << chunk->z();
	for (u16 x = 0 ; x < CHUNK_WIDTH ; ++x) {
		for (u16 y = 0 ; y < CHUNK_HEIGHT ; ++y) {
			for (u16 z = 0 ; z < CHUNK_DEPTH ; ++z) {
				packet << u16(chunk->data()[x][y][z]);
				packet << chunk->lightmap().getLightData(x, y, z);
			}
		}
	}

	client.tcpSocket->send(packet);
	chunk->setSent(true);

	// std::cout << "Chunk at (" << chunk->x() << ", " << chunk->y() << ", " << chunk->z() << ") sent to client" << std::endl;
}

Chunk *ServerWorld::getChunk(int cx, int cy, int cz) const {
	auto it = m_chunks.find({cx, cy, cz});
	if (it == m_chunks.end())
		return nullptr;

	return it->second.get();
}