1 files changed, 129 insertions, 0 deletions

diff --git a/src/World.cpp b/src/World.cpp
new file mode 100644
index 0000000..487f4ba
--- /dev/null
+++ b/src/World.cpp
@@ -0,0 +1,129 @@
+#include "World.hpp"
+
+void World::ParseChunkData(std::shared_ptr<PacketChunkData> packet) {
+	StreamBuffer chunkData(packet->Data.data(), packet->Data.size());
+	std::bitset<16> bitmask(packet->PrimaryBitMask);
+	for (int i = 0; i < 16; i++) {
+		if (bitmask[i]) {
+			Vector chunkPosition = Vector(packet->ChunkX, i, packet->ChunkZ);
+			Section section = ParseSection(&chunkData, chunkPosition);
+			section.Parse();
+			sectionMutexes[chunkPosition].lock();
+			auto it = sections.find(chunkPosition);
+			if (it == sections.end()) {
+				sections.insert(std::make_pair(chunkPosition, section));
+			} else {
+				using std::swap;
+				swap(it->second, section);
+			}
+			sectionMutexes[chunkPosition].unlock();
+		}
+	}
+}
+
+Section World::ParseSection(StreamInput *data, Vector position) {
+	unsigned char bitsPerBlock = data->ReadUByte();
+	int paletteLength = data->ReadVarInt();
+	std::vector<unsigned short> palette;
+	for (int i = 0; i < paletteLength; i++) {
+		palette.push_back(data->ReadVarInt());
+	}
+	int dataArrayLength = data->ReadVarInt();
+	auto dataArray = data->ReadByteArray(dataArrayLength * 8);
+	auto blockLight = data->ReadByteArray(4096 / 2);
+	std::vector<unsigned char> skyLight;
+	if (dimension == 0)
+		skyLight = data->ReadByteArray(4096 / 2);
+	return Section(position, dataArray.data(), dataArray.size(), blockLight.data(),
+	               (skyLight.size() > 0 ? skyLight.data() : nullptr), bitsPerBlock, palette);
+}
+
+World::~World() {
+}
+
+World::World() {
+
+}
+
+bool World::isPlayerCollides(double X, double Y, double Z) {
+	Vector PlayerChunk(floor(X / 16.0), floor(Y / 16.0), floor(Z / 16.0));
+	std::vector<Vector> closestSectionsCoordinates = {
+			Vector(PlayerChunk.GetX(), PlayerChunk.GetY(), PlayerChunk.GetZ()),
+			Vector(PlayerChunk.GetX() + 1, PlayerChunk.GetY(), PlayerChunk.GetZ()),
+			Vector(PlayerChunk.GetX() - 1, PlayerChunk.GetY(), PlayerChunk.GetZ()),
+			Vector(PlayerChunk.GetX(), PlayerChunk.GetY() + 1, PlayerChunk.GetZ()),
+			Vector(PlayerChunk.GetX(), PlayerChunk.GetY() - 1, PlayerChunk.GetZ()),
+			Vector(PlayerChunk.GetX(), PlayerChunk.GetY(), PlayerChunk.GetZ() + 1),
+			Vector(PlayerChunk.GetX(), PlayerChunk.GetY(), PlayerChunk.GetZ() - 1),
+	};
+	std::vector<std::map<Vector, Section>::iterator> closestSections;
+	for (auto &coord:closestSectionsCoordinates) {
+		auto it = sections.find(coord);
+		if (it != sections.end())
+			closestSections.push_back(it);
+	}
+	if (closestSections.empty())
+		return false;
+
+	for (auto &it:closestSections) {
+
+		const double PlayerWidth = 0.6;
+		const double PlayerHeight = 1.82;
+		const double PlayerLength = 0.6;
+
+		AABB playerColl;
+		playerColl.x = X - PlayerWidth / 2.0;
+		playerColl.w = PlayerWidth;
+		playerColl.y = Y;
+		playerColl.h = PlayerHeight;
+		playerColl.z = Z - PlayerLength / 2.0;
+		playerColl.l = PlayerLength;
+
+		for (int x = 0; x < 16; x++) {
+			for (int y = 0; y < 16; y++) {
+				for (int z = 0; z < 16; z++) {
+					Block block = it->second.GetBlock(Vector(x, y, z));
+					if (block.id == 0 || block.id == 31)
+						continue;
+					AABB blockColl{(x + it->first.GetX() * 16.0),
+					               (y + it->first.GetY() * 16.0),
+					               (z + it->first.GetZ() * 16.0), 1, 1, 1};
+					if (TestCollision(playerColl, blockColl))
+						return true;
+				}
+			}
+		}
+	}
+	return false;
+}
+
+Block &World::GetBlock(Vector pos) {
+	Vector sectionPos (floor(pos.GetX() / 16.0f),floor(pos.GetY() / 16.0f),floor(pos.GetZ()/16.0f));
+	Vector inSectionPos = pos - (sectionPos * 16);
+	if (sections.find(sectionPos)==sections.end()){
+		static Block block(0,0);
+		return block;
+	}
+	sectionMutexes[sectionPos].lock();
+	Block& block = sections.find(sectionPos)->second.GetBlock(inSectionPos);
+	sectionMutexes[sectionPos].unlock();
+	return block;
+}
+
+std::vector<Vector> World::GetSectionsList() {
+	std::vector<Vector> sectionsList;
+	for (auto& it:sections) {
+		sectionsList.push_back(it.first);
+	}
+	return sectionsList;
+}
+
+Section &World::GetSection(Vector sectionPos) {
+	sectionMutexes[sectionPos].lock();
+	sectionMutexes[sectionPos].unlock();
+	return sections.find(sectionPos)->second;
+}
+
+glm::vec3 World::Raycast(glm::vec3 position, glm::vec3 direction, float maxLength, float minPrecision) {
+    return glm::vec3(position * direction / maxLength * minPrecision);
+}