SN 01 - Function over Form

https://github.com/Zageron/ffrust

• SN 01 - Function over Form
  • Project
  • Constraints
    • Technical Constraints
    • Design Constraints
    • Implementation Constraints
    • Completion Requirements

Project

We would like to create a rough draft of an FFR remake in Rust for desktop (linux, mac, and windows) and future browsers (wasm / webgpu).

Constraints

Technical Constraints

• WebGPU is not yet supported in general availability browsers.
• No GUI or TUI will be implemented.
• No game engine will be used.

Design Constraints

• User input will be restricted to the spacebar.
• There is no audio or music.
• "Charts" are a simple ASCII file with no metadata.
  • "Notes" are represented as a list of ms timings.
• Single lane gameplay. (Simplified Taiko No Tatsujin.)
  • Notes spawn at the end of the lane, on screen.
  • Notes move at linear pace up the lane.
  • Notes despawn at the top of the lane.
  • Notes may despawn when interacted with during the "receptor" stage.
• Score is tallied in two buckets
  • Hit
  • Miss
• No state, the game begins immediately on loading application.
  • Likewise, the chart does not repeat once finished.

Implementation Constraints

• Notes are rendered though a simple shape shader.
  • No texture loading.
• Note position/existence is determined by an absolute ms tick.
• Notes follow a single path along a "lane".
  • Notes are not free to be positioned, but instead have a progress on a lane.
• Lane representation which notes may move along.

Completion Requirements

• Shader for representing the notes.
• Lane implementation.
  • Note lifetime (spawning and despawning)
• Note implementation.
• "Chart" interpreter.
• Chart format and exmaple file.
• Keyboard event for spacebar.
• Hit timing mechanism for determining whether a note was hit or not.
• Native application rendering and input.
• WASM application rendering and input.