Write the changelog.

content/changelog/2024.1201/index.md

@@ -0,0 +1,104 @@
+---
+title: "2024.0831"
+date: 2024-08-31
+---
+
+## Achievement
+
+- Re-implement the stage system.
+  - Use command to adjust the lyric's transformer like how storyboard did.
+  - Separate the stage from the beatmap.
+- Planning 2-weeks december vacation.
+  - Stay at Osaka and Kyoto for few days and trying to servival.
+  - Work few days at Tokyo.
+  - Go to Comiket.
+  - Give some weird meat a try.
+  - Skiing for 5 days.
+- Remember update the changelog.
+
+## Blog
+
+- Add special badge at the start of the changelog item. [karaoke](#2279#2281@andy840119)
+  ![](res/2024-12-01-08-24-24.png)
+
+## Code quality
+
+- Rename from "language" to "translation" in some classes. [karaoke](#2282@andy840119)
+- Regular clean-up code. [karaoke](#2288@andy840119)
+
+## Editor
+
+- Add translation edit section to the editor. [karaoke](#2284@andy840119)
+  ![](res/2024-12-01-08-26-09.png)
+- Add karaoke-specific sections to setup screen. [karaoke](#836@andy840119)
+  - Separate singer and singer state into different list. [karaoke](#2289@andy840119)
+  - Improve singer section. [karaoke](#2290@andy840119)
+
+## Gameplay
+
+- Fix note judgement cause exception. [karaoke](#2293#2295@andy840119)
+
+## Stage
+
+Guess it's time to explain why changelog not update so long.  
+Before that, lets talking about what is `Stage` first.
+
+`Stage` is a system to give the effect to the lyric. For example:
+
+[![](res/2024-12-01-07-38-35.png)](https://x.com/k_sukeo_/status/1412379617269219329)
+It's a very classic Japanese lyric arrangement.  
+It has usually 2~4 lines of lyric at the screen.  
+Each lyric can be padding to left/center/right.
+If the lyric is end, the next lyric will take over it's position immediately.
+
+[![](res/2024-12-01-07-41-30.png)](https://support.apple.com/zh-tw/guide/music-web/apdm5e4a7164/web)
+And here's the lyric arrangement that apple music use.  
+The current lyric at the center, if the lyric is end, next lyric will move to the center to replace the old one.
+
+In order to add more type of stage arrangement in the future. e.g., let user able to edit the lyric's position and appear/disappear time.  
+The stage system should be flexible.
+
+And stage system should have those features:
+
+- It can assign the lyric's actual Start/End time in the playfield.
+- Change the property in the lyric to adjust the position. e.g. Position, margin and padding.
+- Change the property in the lyric like drawable. e.g. Scale and alpha.
+- Add custom element to the playfield. e.g. beatmap info preview.
+- (TBD) Change lyric's font.
+- (TBD) Change lyric's shader effect.
+
+And [here's the system desing](https://app.affine.pro/workspace/40306a8a-6c73-4c99-a961-4f928980ef42/uso65AOQC3Hhn3Fs7wh8n)  
+Thanks to the affine, it's a open-source platform that able to write the doc and graph.
+~~It has few bugs while undo/redo but still worth to give it a try.~~
+
+And here's the milestone, the re-implement plan is tracked in [this issue](https://github.com/karaoke-dev/karaoke/issues/2090)
+
+- M0 - Preparation
+  - Move the stage-related class from beatmap namespace into it's own namespace. [karaoke](#2089@andy840119)
+  - Adjust the folder structure in the stage namespace. [karaoke](#2297@andy840119)
+  - System desing for the new stage menegement system. [karaoke](#2244#2294@andy840119)
+- M1 - Create the transformer command generator
+  > Before:  
+  > Implement the transformer action for different type of stage.  
+  > After:  
+  > Let stage generate transformer command, and provide the same command executer to execute all transformer command that generated from any type of stage.  
+  > Benefit:  
+  > Make the system more fiexible, and easier to maintain.
+  - Create the command generator for the hit-object. [karaoke](#2296@andy840119)
+  - Create the command generator for the playfield. [karaoke](#2303@andy840119)
+  - Create the command generator for the create custom element in the gameplay. [karaoke](#2304@andy840119)
+- M2 - Create the drawable stage environment
+  > It's a wrapper for able to provide the necessary resource for lyric/playfield.  
+  > e.g. DI that able to execute the transformer command.  
+  > Design is inspired from the `DrawableStoryboard` in lazer.
+  - Create the drawable stage. [karaoke](#2301@andy840119)
+  - Create the stage-related injections. [karaoke](#2296#2301@andy840119)
+- M3 - Not provide state-related properties by the beatmap
+  > It's time to separate the stage system form the beatmap.
+  - Able to control lyric's stage/end time by stage and drawable layer. [karaoke](#2298@andy840119)
+  - Remove the old hit-object applier from the beatmap. [karaoke](#2301@andy840119)
+  - emove the old playfield applier from the beatmap. [karaoke](#2303#2304@andy840119)
+- M4 - Refactor
+  - Refactor the interface in the stage namespace. [karaoke](#2302@andy840119)
+  - Remove the stage info list in the beatmap. [karaoke](#2305@andy840119)
+  - Remove the current stage info in the beatmap. [karaoke](#2305@andy840119)