text stringlengths 0 595 |
|---|
--- |
## String Functions |
| Function | Description | |
|----------|-------------| |
| `ASC(s$)` | ASCII code of first char | |
| `CHR(n)` | Character from ASCII code | |
| `INSTR(s$, search$)` | Position (1-based), 0=not found | |
| `INSTR(start, s$, search$)` | Search from position | |
| `INVERT(s$)` | Reverse string | |
| `LCASE(s$)` / `UCASE(s$)` | Lower / upper case | |
| `LEFT(s$, n)` / `RIGHT(s$, n)` | First/last n chars | |
| `LEN(s$)` | String length | |
| `LTRIM(s$)` / `RTRIM(s$)` / `TRIM(s$)` | Strip whitespace | |
| `MID(s$, start)` | Substring from start (1-based) | |
| `MID(s$, start, len)` | Substring with length | |
| `REPEAT(s$, n)` | Repeat string n times | |
| `REPLACE(s$, a$, b$)` | Replace a$ with b$ in s$ | |
| `SPLIT(arr$, s$, sep$)` | Split into array, returns count | |
| `SRAND(n)` | Random alphanumeric string of length n | |
| `STR(n)` | Number to string | |
| `VAL(s$)` | String to number | |
| `SHA256(s$)` | SHA256 hash (64-char hex) | |
| `BASE64ENCODE(s$)` / `BASE64DECODE(s$)` | Base64 encode/decode | |
--- |
## Math Functions |
| Function | Description | |
|----------|-------------| |
| `ABS(n)` | Absolute value | |
| `ATAN(n)` | Arc tangent | |
| `BETWEEN(n, min, max)` | TRUE if min ≤ n ≤ max | |
| `CEIL(n)` / `FLOOR(n)` | Round up / down | |
| `CINT(n)` | Round to nearest integer | |
| `CLAMP(n, min, max)` | Constrain n to [min, max] | |
| `COS(n)` / `SIN(n)` / `TAN(n)` | Trig (radians) | |
| `DEG(rad)` / `RAD(deg)` | Radians ↔ degrees | |
| `DISTANCE(x1,y1, x2,y2)` | 2D Euclidean distance | |
| `DISTANCE(x1,y1,z1, x2,y2,z2)` | 3D Euclidean distance | |
| `EXP(n)` | e^n | |
| `INT(n)` | Truncate toward zero | |
| `LERP(start, end, t)` | Linear interpolation (t: 0.0–1.0) | |
| `LOG(n)` | Natural logarithm | |
| `MAX(a, b)` / `MIN(a, b)` | Larger / smaller of two | |
| `MOD(a, b)` | Remainder | |
| `POW(base, exp)` | Power | |
| `RND(0)` | Random float 0.0 to <1.0 | |
| `RND(n)` | Random integer 0 to n-1 (n ≥ 1) | |
| `ROUND(n)` | Standard rounding | |
| `SGN(n)` | Sign: -1, 0, or 1 | |
| `SQR(n)` | Square root | |
**Math constants:** `PI`, `HPI` (PI/2), `QPI` (PI/4), `TAU` (PI*2), `EULER` |
--- |
## Graphics |
```basic |
SCREEN 12 ' 640×480 VGA (recommended) |
SCREEN 0, 800, 600 ' Custom size |
SCREEN 0, 1024, 768, "My Game" ' Custom size + title |
FULLSCREEN TRUE ' Borderless fullscreen (graphics only) |
FULLSCREEN FALSE ' Windowed |
``` |
| Mode | Resolution | |
|------|-----------| |
| 1 | 320×200 | |
| 2 | 640×350 | |
| 7 | 320×200 | |
| 9 | 640×350 | |
| 12 | 640×480 ← recommended | |
| 13 | 320×200 | |
### Drawing Primitives |
```basic |
PSET (x, y), color ' Pixel |
LINE (x1,y1)-(x2,y2), color ' Line |
LINE (x1,y1)-(x2,y2), color, B ' Box outline |
LINE (x1,y1)-(x2,y2), color, BF ' Box filled (FAST — use instead of CLS) |
CIRCLE (cx,cy), radius, color ' Circle outline |
CIRCLE (cx,cy), radius, color, 1 ' Circle filled |
PAINT (x, y), fillColor, borderColor ' Flood fill |
LET c$ = POINT(x, y) ' Read pixel color |
LET col$ = RGB(r, g, b) ' Create color (0–255 each) |
``` |
**Color palette (COLOR command, 0–15):** 0=Black, 1=Blue, 2=Green, 3=Cyan, 4=Red, 5=Magenta, 6=Brown, 7=Lt Gray, 8=Dk Gray, 9=Lt Blue, 10=Lt Green, 11=Lt Cyan, 12=Lt Red, 13=Lt Magenta, 14=Yellow, 15=White |
### Screen Control |
```basic |
SCREENLOCK ON ' Buffer drawing (start frame) |
SCREENLOCK OFF ' Present buffer (end frame) |
VSYNC(TRUE) ' Enable VSync (default, ~60 FPS) |
VSYNC(FALSE) ' Disable VSync (benchmarking) |
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