text stringlengths 0 721 |
|---|
IF KEYDOWN(KEY_RIGHT#) THEN x$ = x$ + MAX_SPEED# |
RETURN |
[sub:draw] |
SCREENLOCK ON |
LINE (0,0)-(SCREEN_W#, SCREEN_H#), 0, BF |
CIRCLE (x$, y$), 10, RGB(0, 255, 0), 1 |
SCREENLOCK OFF |
RETURN |
``` |
**Key conventions:** |
- Variables: `camelCase$` | Constants: `UPPER_SNAKE_CASE#` | Functions: `PascalCase$` |
- Labels: `[gameLoop]` for jump targets, `[sub:name]` for subroutines |
- Image/sound/shape IDs are stable integer handles — **always** store as constants: `LET MY_IMG# = LOADIMAGE("x.png")` — never use `$` variables for these |
- Group many IDs → use arrays: `DIM sprites$` / `sprites$("player") = LOADIMAGE(...)` — but prefer named constants when count is small |
--- |
## Performance Tips |
- `LINE (0,0)-(W,H), 0, BF` to clear — much faster than `CLS` |
- Always wrap draw code in `SCREENLOCK ON` / `SCREENLOCK OFF` |
- Store `RGB()` results in constants/variables — don't call RGB in hot loops |
- Declare all variables in `[inits]`, not inside loops or subroutines |
- Use `FastTrig` for any loop calling trig hundreds of times per frame |
- `SLEEP 16` in game loop → ~60 FPS |
--- |
## Known Limitations |
Things to be aware of — most are deliberate design decisions, a few are practical constraints. |
- **Platform: Windows x64 only.** Linux and macOS are not supported. Browser/Android are not feasible — the runtime depends on SDL2 via P/Invoke. |
- **Arrays cannot be passed to functions.** Use the `ASJSON` / `ASARRAY` round-trip pattern. The function receives an independent copy. |
- **`DEF FN` scope is fully isolated.** Functions can read global `#` constants but cannot see any `$` variables from the outer scope. Pass values as parameters. |
- **No block scope.** `IF`, `FOR`, and `WHILE` do not create new variable scopes — all main-code variables share one namespace. |
- **No exception handling.** There is no `TRY`/`CATCH` and no `ON ERROR`. Runtime errors halt the program with a line-numbered message printed to the console. |
- **Division by zero returns `0` silently.** No exception, no warning. Guard with `IF b$ = 0 THEN ...` when correctness matters. |
- **No integer-division operator.** Use `INT(a / b)`, `FLOOR(a / b)`, or `CINT(a / b)` depending on the rounding behavior you need. |
- **Compiled `.bb` libraries are version-locked** to the BazzBasic build that produced them. Recompile after upgrading the interpreter. |
- **`DEF FN` definitions must precede their first call** in source order. Forward references don't resolve. |
--- |
## IDE Features (v1.4b) |
### New File Template |
When the IDE opens with no file (or a new file), this template is auto-inserted: |
```basic |
' BazzBasic version {ver_num} |
' https://ekbass.github.io/BazzBasic/ |
``` |
### Beginner's Guide |
- **IDE:** Menu → **Help** → **Beginner's Guide** — opens `https://github.com/EkBass/BazzBasic-Beginners-Guide/releases` in default browser |
- **CLI:** `bazzbasic.exe -guide` or `bazzbasic.exe -help` — prints URL to terminal |
### Check for Updates |
- **IDE:** Menu → **Help** → **Check for updated...** — IDE reports if a newer version is available |
- **CLI:** `bazzbasic.exe -checkupdate` |
### Compile via IDE |
- **Menu → Run → Compile as Exe** — compiles open file to standalone `.exe` (auto-saves first) |
- **Menu → Run → Compile as Library (.bb)** — compiles open file as reusable `.bb` library (auto-saves first) |
EOF |
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