Asteroids
4.6★ 35 ratings
1.2k+ Downloads
.py Format
About this app
Requires PythonExtra runtime to execute.
Asteroids is a minimalist wireframe recreation of the classic arcade shooter for the CASIO ClassPad II. Pilot a triangular ship, dodge and destroy rotating asteroids, and chain splits for high scores. Built with fixed-point math and lookup tables for smooth performance on calculator hardware.
Features
- Fixed-point physics: integer-based movement and collision for consistent speed
- Precomputed trig tables: sin/cos LUTs eliminate runtime math overhead
- Asteroid splitting: large rocks break into smaller, faster fragments
- Screen wrapping: exit one edge, enter the opposite
- Particle effects: exhaust trails and explosion debris
- Screenshot capture: press EQUALS to save vram to screenshot.png
Controls
| Key | Action |
|---|---|
| Up / 8 | Thrust forward |
| Left / 4 | Rotate counter-clockwise |
| Right / 6 | Rotate clockwise |
| SHIFT / EXE | Fire bullet |
| EXE (game over) | Restart |
| EQUALS | Save screenshot |
| EXIT | Quit |
Usage
- Copy asteroids.py to your calculator
- Launch via PythonExtra from Hollyhock launcher
- Destroy asteroids, avoid collisions, survive
Technical Notes
- 64-entry sin/cos lookup tables for 360-degree rotation
- Fixed-point coordinates with 8-bit fractional precision
- Collision via squared-distance checks (no sqrt at runtime)
- Entity pooling with pending-add queue for spawn safety
Requirements
- CASIO ClassPad II (fx-CP400)
- Hollyhock-3 firmware
- PythonExtra runtime
A performance-focused tribute to arcade classics, optimized for embedded constraints.