Settings loading and storing (using fancy comptime reflection).

src/game.zig

@@ -19,6 +19,7 @@ const Mat4f = vec.Mat4f;
 const graphics = @import("graphics.zig");
 const Fog = graphics.Fog;
 const renderer = @import("renderer.zig");
+const settings = @import("settings.zig");
 
 pub const camera = struct {
 	pub var rotation: Vec3f = Vec3f{0, 0, 0};
@@ -99,7 +100,7 @@ pub const World = struct {
 		// TODO:
 //		super.itemEntityManager = new InterpolatedItemEntityManager(this);
 //		player = new ClientPlayer(this, 0);
-		try network.Protocols.handShake.clientSide(self.conn, "quanturmdoelvloper"); // TODO: Read name from settings.
+		try network.Protocols.handShake.clientSide(self.conn, settings.playerName);
 	}
 
 	pub fn deinit(self: *World) void {

src/json.zig

@@ -146,7 +146,6 @@ pub const JsonElement = union(JsonType) {
 			},
 			.Pointer => |ptr| {
 				if(ptr.child == u8 and ptr.size == .Slice) {
-					std.log.info("String: {s}", .{value});
 					return JsonElement{.JsonString=value};
 				} else {
 					@compileError("Unknown value type.");
@@ -163,6 +162,11 @@ pub const JsonElement = union(JsonType) {
 		try self.JsonObject.put(try self.JsonObject.allocator.dupe(u8, key), result);
 	}
 
+	pub fn putOwnedString(self: *const JsonElement, key: []const u8, value: []const u8) !void {
+		const result = JsonElement{.JsonStringOwned = try self.JsonObject.allocator.dupe(u8, value)};
+		try self.JsonObject.put(try self.JsonObject.allocator.dupe(u8, key), result);
+	}
+
 	pub fn free(self: *const JsonElement, allocator: Allocator) void {
 		switch(self.*) {
 			JsonType.JsonInt, JsonType.JsonFloat, JsonType.JsonBool, JsonType.JsonNull, JsonType.JsonString => return,

src/main.zig

@@ -237,6 +237,9 @@ pub fn main() !void {
 	threadPool = try utils.ThreadPool.init(poolgpa.allocator(), 1 + ((std.Thread.getCpuCount() catch 4) -| 3));
 	defer threadPool.deinit();
 
+	try settings.init();
+	defer settings.deinit();
+
 	try Window.init();
 	defer Window.deinit();
 
@@ -272,7 +275,7 @@ pub fn main() !void {
 	var manager = try network.ConnectionManager.init(12347, true);
 	defer manager.deinit();
 
-	try game.world.?.init("127.0.0.1", manager);
+	try game.world.?.init(settings.lastUsedIPAddress, manager);
 	defer game.world.?.deinit();
 
 	Window.setMouseGrabbed(true);

src/settings.zig

@@ -1,21 +1,129 @@
+const std = @import("std");
 
+const json = @import("json.zig");
+const main = @import("main.zig");
 
 pub const defaultPort: u16 = 47649;
 pub const connectionTimeout = 60000;
 
 pub const entityLookback: i16 = 100;
 
-pub const version = "0.12.0";
+pub const version = "Cubyz α 0.12.0";
 
 pub const highestLOD: u5 = 5;
 
 
+pub var entityDistance: i32 = 2;
 
-pub var fov: f32 = 45;
+
+pub var fov: f32 = 70;
 
 pub var mouseSensitivity: f32 = 1;
 
+pub var fogCoefficient: f32 = 15;
+
 pub var renderDistance: i32 = 4;
 pub var LODFactor: f32 = 2.0;
 
-pub var bloom: bool = true;
+pub var bloom: bool = true;
+
+pub var playerName: []const u8 = "quanturmdoelvloper";
+
+pub var lastUsedIPAddress: []const u8 = "localhost";
+
+
+pub fn init() !void {
+	const jsonObject = blk: {
+		var file = std.fs.cwd().openFile("settings.json", .{}) catch break :blk json.JsonElement{.JsonNull={}};
+		defer file.close();
+		const fileString = try file.readToEndAlloc(main.threadAllocator, std.math.maxInt(usize));
+		defer main.threadAllocator.free(fileString);
+		break :blk json.parseFromString(main.threadAllocator, fileString);
+	};
+	defer jsonObject.free(main.threadAllocator);
+
+	inline for(@typeInfo(@This()).Struct.decls) |decl| {
+		const is_const = @typeInfo(@TypeOf(&@field(@This(), decl.name))).Pointer.is_const; // Sadly there is no direct way to check if a declaration is const.
+		if(!is_const and decl.is_pub) {
+			const declType = @TypeOf(@field(@This(), decl.name));
+			if(@typeInfo(declType) == .Struct) {
+				@compileError("Not implemented yet.");
+			}
+			@field(@This(), decl.name) = jsonObject.get(declType, decl.name, @field(@This(), decl.name));
+			if(@typeInfo(declType) == .Pointer) {
+				if(@typeInfo(declType).Pointer.size == .Slice) {
+					@field(@This(), decl.name) = try main.globalAllocator.dupe(@typeInfo(declType).Pointer.child, @field(@This(), decl.name));
+				} else {
+					@compileError("Not implemented yet.");
+				}
+			}
+		}
+	}
+}
+
+pub fn deinit() void {
+	const jsonObject = json.JsonElement.initObject(main.threadAllocator) catch |err| {
+		std.log.err("Error in settings.deinit(): {s}", .{@errorName(err)});
+		return;
+	};
+	defer jsonObject.free(main.threadAllocator);
+
+	inline for(@typeInfo(@This()).Struct.decls) |decl| {
+		const is_const = @typeInfo(@TypeOf(&@field(@This(), decl.name))).Pointer.is_const; // Sadly there is no direct way to check if a declaration is const.
+		if(!is_const and decl.is_pub) {
+			const declType = @TypeOf(@field(@This(), decl.name));
+			if(@typeInfo(declType) == .Struct) {
+				@compileError("Not implemented yet.");
+			}
+			if(declType == []const u8) {
+				jsonObject.putOwnedString(decl.name, @field(@This(), decl.name)) catch |err| {
+					std.log.err("Error in settings.deinit(): {s}", .{@errorName(err)});
+				};
+			} else {
+				jsonObject.put(decl.name, @field(@This(), decl.name)) catch |err| {
+					std.log.err("Error in settings.deinit(): {s}", .{@errorName(err)});
+				};
+			}
+			if(@typeInfo(declType) == .Pointer) {
+				if(@typeInfo(declType).Pointer.size == .Slice) {
+					main.globalAllocator.free(@field(@This(), decl.name));
+				} else {
+					@compileError("Not implemented yet.");
+				}
+			}
+		}
+	}
+	
+	const string = jsonObject.toStringEfficient(main.threadAllocator, "") catch |err| {
+		std.log.err("Error in settings.deinit(): {s}", .{@errorName(err)});
+		return;
+	};
+	defer main.threadAllocator.free(string);
+
+	var file = std.fs.cwd().createFile("settings.json", .{}) catch |err| {
+		std.log.err("Error in settings.deinit(): {s}", .{@errorName(err)});
+		return;
+	};
+	defer file.close();
+
+	file.writeAll(string) catch |err| {
+		std.log.err("Error in settings.deinit(): {s}", .{@errorName(err)});
+		return;
+	};
+}
+
+// TODO: Check if/how these are needed:
+//	static Side currentSide = null;
+//
+//	private static Language currentLanguage = null;
+//
+//	public static int GUI_SCALE = 2;
+//
+//	public static boolean musicOnOff = true; //Turn on or off the music
+//
+//	/**Not actually a setting, but stored here anyways.*/
+//	public static int EFFECTIVE_RENDER_DISTANCE = calculatedEffectiveRenderDistance();
+//	
+//	public static int calculatedEffectiveRenderDistance() {
+//		return RENDER_DISTANCE + (((int)(RENDER_DISTANCE*LOD_FACTOR) & ~1) << Constants.HIGHEST_LOD);
+//	}