refactor(scene): decouple player level/position from notifying systems

gamesv/src/logic/World.zig

@@ -15,10 +15,32 @@ pub const PlayerId = struct {
     uid: mem.LimitedString(max_length),
 };
 
+// TODO: this can be made a persistent Player component.
+pub const Location = struct {
+    const default_level = "map02_lv001";
+
+    level: i32,
+    position: [3]f32,
+
+    fn createDefault(assets: *const Assets) Location {
+        const level_config = assets.level_config_table.getPtr(default_level).?;
+
+        return .{
+            .level = level_config.idNum,
+            .position = .{
+                level_config.playerInitPos.x,
+                level_config.playerInitPos.y,
+                level_config.playerInitPos.z,
+            },
+        };
+    }
+};
+
 player_id: PlayerId,
 session: *Session, // TODO: should it be here this way? Do we need an abstraction?
 res: logic.Resource,
 player: logic.Player,
+location: Location,
 
 pub fn init(
     session: *Session,
@@ -34,6 +56,7 @@ pub fn init(
         .session = session,
         .player = player,
         .res = .init(assets, io),
+        .location = .createDefault(assets),
     };
 }
 
@@ -48,6 +71,7 @@ pub const GetComponentError = error{
 pub fn getComponentByType(world: *World, comptime T: type) GetComponentError!T {
     switch (T) {
         PlayerId => return world.player_id,
+        *Location, *const Location => return &world.location,
         *Session => return world.session,
         *logic.Resource.PingTimer => return &world.res.ping_timer,
         *const Assets => return world.res.assets,

gamesv/src/logic/event/kinds.zig

@@ -1,5 +1,7 @@
 pub const Login = struct {};
 
+pub const ChangeSceneBegin = struct {};
+
 pub const CharBagTeamModified = struct {
     team_index: usize,
     modification: enum {

gamesv/src/logic/systems/scene.zig

@@ -8,32 +8,37 @@ const Player = logic.Player;
 const ArrayList = std.ArrayList;
 const Allocator = std.mem.Allocator;
 
-const default_level = "map02_lv001";
-
 pub fn enterSceneOnLogin(
     rx: logic.event.Receiver(.login),
+    tx: logic.event.Sender(.change_scene_begin),
+) !void {
+    _ = rx;
+    try tx.send(.{});
+}
+
+pub fn beginChangingScene(
+    rx: logic.event.Receiver(.change_scene_begin),
     session: *Session,
-    assets: *const Assets,
     base_comp: Player.Component(.base),
+    location: *const logic.World.Location,
 ) !void {
     _ = rx;
 
-    const level_config = assets.level_config_table.getPtr(default_level).?;
     const position: pb.VECTOR = .{
-        .X = level_config.playerInitPos.x,
-        .Y = level_config.playerInitPos.y,
-        .Z = level_config.playerInitPos.z,
+        .X = location.position[0],
+        .Y = location.position[1],
+        .Z = location.position[2],
     };
 
     try session.send(pb.SC_CHANGE_SCENE_BEGIN_NOTIFY{
-        .scene_num_id = level_config.idNum,
+        .scene_num_id = location.level,
         .position = position,
         .pass_through_data = .init,
     });
 
     try session.send(pb.SC_ENTER_SCENE_NOTIFY{
         .role_id = base_comp.data.role_id,
-        .scene_num_id = level_config.idNum,
+        .scene_num_id = location.level,
         .position = position,
         .pass_through_data = .init,
     });
@@ -58,6 +63,7 @@ pub fn syncSelfScene(
     session: *Session,
     arena: logic.Resource.Allocator(.arena),
     char_bag: logic.Player.Component(.char_bag),
+    location: *const logic.World.Location,
     assets: *const Assets,
 ) !void {
     const reason: pb.SELF_INFO_REASON_TYPE = switch (rx.payload.reason) {
@@ -65,18 +71,17 @@ pub fn syncSelfScene(
         .team_modified => .SLR_CHANGE_TEAM,
     };
 
-    const level_config = assets.level_config_table.getPtr(default_level).?;
     const position: pb.VECTOR = .{
-        .X = level_config.playerInitPos.x,
-        .Y = level_config.playerInitPos.y,
-        .Z = level_config.playerInitPos.z,
+        .X = location.position[0],
+        .Y = location.position[1],
+        .Z = location.position[2],
     };
 
     const team_index = char_bag.data.meta.curr_team_index;
     const leader_index = char_bag.data.teams.items(.leader_index)[team_index];
 
     var self_scene_info: pb.SC_SELF_SCENE_INFO = .{
-        .scene_num_id = level_config.idNum,
+        .scene_num_id = location.level,
         .self_info_reason = @intFromEnum(reason),
         .teamInfo = .{
             .team_type = .CHAR_BAG_TEAM_TYPE_MAIN,
@@ -106,7 +111,7 @@ pub fn syncSelfScene(
                 .templateid = char_template_id,
                 .position = position,
                 .rotation = .{},
-                .scene_num_id = level_config.idNum,
+                .scene_num_id = location.level,
             },
         };