BUMP

BASIC keyword
Keyword:	BUMP
Abbreviation:	B SHIFT+U
Type:	Function
Token code:	206/$CE 3/$03
Handling routine in BASIC ROM:
List of all BASIC keywords

Remark: This article describes the BASIC function BUMP in Commodore BASIC V7.0 or higher.

Type: Function
General Programming-Syntax: BUMP (N)

The BUMP function returns sprite collision information.

To determine which sprites have collided since the last check, use the BUMP function.

• BUMP(1) records which sprites have collided with each other.
• BUMP(2) records which sprites have collided with other objects on the screen, COLLISION need not be active to use BUMP.

The bit positions (0-7) in the BUMP value correspond to sprites 1 through 8 respectively. BUMP(n) is reset to zero after each call.

The value returned by BUMP is the result of two raised to the power of the bit position. For example if BUMP returned a value of 16, sprite 4 was involved in a collision since 2 raised to the fourth power equals 16.

Another sprite commands in BASIC 7.0 are RSPCOLOR, RSPPOS, RSPRITE, SPRCOLOR, SPRITE, SPRDEF and SPRSAV, also COLLISION, GSHAPE and SSHAPE.

Examples

Indicates that sprite 2 and 3 have collided.

PRINT BUMP(1)  

Result:

12

Indicates that sprite 5 has collided with an object on the screen

PRINT BUMP(2)  

Result:

32

BASIC V7.0 Commands

ABS | AND | APPEND | ASC | ATN | AUTO | BACKUP | BANK | BEGIN | BEND | BLOAD | BOOT | BOX | BSAVE | BUMP | CATALOG | CHAR | CHR$ | CIRCLE | CLOSE | CLR | CMD | COLLECT | COLLISION | COLOR | CONCAT | CONT | COPY | COS | DATA | DCLEAR | DCLOSE | DEC | DEF FN | DELETE | DIM | DIRECTORY | DLOAD | DO | DOPEN | DRAW | DS | DS$ | DSAVE | DVERIFY | EL | ELSE | END | ENVELOPE | ER | ERR$ | EXIT | EXP | FAST | FETCH | FILTER | FN | FOR | FRE | GET | GET# | GETKEY | GO64 | GOSUB | GOTO | GRAPHIC | GSHAPE | HEADER | HELP | HEX$ | IF | INPUT | INPUT# | INSTR | INT | JOY | KEY | LEFT$ | LEN | LET | LIST | LOAD | LOCATE | LOG | LOOP | MID$ | MONITOR | MOVSPR | NEW | NEXT | NOT | (OFF) | ON | OPEN | OR | PAINT | PEEK | PEN | (PI) | PLAY | POINTER | POKE | POS | POT | PRINT | PRINT USING | PRINT# | PUDEF | (QUIT) | RCLR | RDOT | READ | RECORD | REM | RENAME | RENUMBER | RESTORE | RESUME | RETURN | RGR | RIGHT$ | RND | RREG | RSPCOLOR | RSPPOS | RSPRITE | RUN | RWINDOW | SAVE | SCALE | SCNCLR | SCRATCH | SGN | SIN | SLEEP | SLOW | SOUND | SPC( | SPRCOLOR | SPRDEF | SPRITE | SPRSAV | SQR | SSHAPE | ST | STASH | STEP | STOP | STR$ | SWAP | SYS | TAB( | TAN | TEMPO | THEN | TI | TI$ | TO | TRAP | TROFF | TRON | USR | VAL | VERIFY | VOL | WAIT | WHILE | WINDOW | WIDTH | XOR