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here is a raycaster i knocked up in 6-lines. anybody else want to share their take on the subject? (btw - this code is gwbasic compatible too!)

Matt Code:
```1 DIM L(7, 7): FOR Y = 0 TO 7: FOR X = 0 TO 7: READ L(X, Y): NEXT X: NEXT Y: X = 24: Y = 24: F = 45: SCREEN 1 2 FOR S = -160 TO 149 STEP 10: R = F + (S * .1875): R = R + 360 * ((R > 360) - (R < 0)): XI = COS(R / 57): YI = SIN(R / 57): X1 = X: Y1 = Y 3 X1 = X1 + XI: Y1 = Y1 + YI: IF L(X1 / 16, Y1 / 16) = 0 THEN GOTO 3 4 D = ABS((X - X1) / COS(R / 57)): H = (1816 / D): LINE (S + 160, 100 - H)-(S + 169, 100 + H), 1, BF: LINE (S + 160, 0)-(S + 169, 99 - H), 0, BF: LINE (S + 160, 101 + H)-(S + 169, 320), 0, BF 5 NEXT S: A\$ = INKEY\$: F = F + 5 * (A\$ = ",") - 5 * (A\$ = "."): F = F - 355 * (F = -5) + 360 * (F = 365): IF A\$ = " " AND (L((X + COS(F / 57)) / 16, (Y + SIN(F / 57)) / 16) = 0) THEN X = X + COS(F / 57): Y = Y + SIN(F / 57) 6 GOTO 2: DATA 1,1,1,1,1,1,1,1,1,0,0,1,0,0,0,1,1,1,0,1,0,1,0,1,1,0,0,0,0,1,0,1,1,0,1,1,0,1,0,1,1,0,1,1,0,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1```
Really cool, and impressive.

But not 6 lines: you cheated using ":" . Anyways, impressive Hah! With colon joined lines, I could make a raycaster in 1 line!!! LOL

Nice job though. :*)
it is 6 lines of code. i forgot to specify it is 6 lines of GW-BASIC compatible code. sorry for the misdirection. Actually I was with the assumption that each line should not have colons for joining.

Like this:

Code:
```'Felix the Helix 'By Jelly 1 IF I% = 0 THEN SCREEN 7, , 0, 1 ELSE PCOPY 0, 1 2 A! = (A! + .03) * -(A! < 6.283186) 3 FOR I% = 0 TO 200 4 x! = ((50 * COS(4 * 3.141593 / 200 * I%)) * (COS(A!) * COS(A!)) + (50 * SIN(8 * 3.141593 / 200 * I%)) * (SIN(A!) * SIN(A!) * COS(A!) - COS(A!) * SIN(A!)) + (I% - (200 / 2)) * (COS(A!) * SIN(A!) * COS(A!) + SIN(A!) * SIN(A!))) 5 y! = ((50 * COS(8 * 3.141593 / 200 * I%)) * (COS(A!) * SIN(A!)) + (50 * SIN(8 * 3.141593 / 200 * I%)) * (COS(A!) * COS(A!) + SIN(A!) * SIN(A!) * SIN(A!)) + (I% - (200 / 2)) * (-SIN(A!) * COS(A!) + COS(A!) * SIN(A!) * SIN(A!))) 6 z! = ((50 * COS(8 * 3.141593 / 200 * I%)) * (-SIN(A!)) + (50 * SIN(8 * 3.141593 / 200 * I%)) * (SIN(A!) * COS(A!)) + (I% - (200 / 2)) * COS(A!) * COS(A!)) 7 IF I% > 1 THEN CIRCLE ((160 + (256 * x! \ (256 - z!))), (100 - (256 * y! \ (256 - z!)))), 512 \ (256 - z!), (A! * 57.29577 + I%) AND 15 ELSE LINE (0, 0)-(319, 199), 0, BF 8 NEXT I% 9 IF INKEY\$ = "" THEN 1```

Code:
```'Translucency is me! Redux... 'by Jelly 1 IF i& = 0 THEN SCREEN 13 ELSE IF i& <= 256 THEN PALETTE i& - 1, 65536 * INT(32 - 31 * SIN(i& * 3.14151693# / 128)) + 256 * INT(32 - 31 * SIN(i& * 3.14151693# / 64)) + INT(32 - 31 * SIN(i& * 3.14151693# / 32)) ELSE z% = 64 * (((i& AND 1) = 1) OR 1) 2 IF xa% = 0 THEN DIM Lsin%(1024) ELSE i& = (i& + 1) AND &H7FFFFFFF 3 FOR ya% = 0 TO 127 4 IF i& < 385 THEN Lsin%(i&) = SIN((i&) / 25) * 64 ELSE xsin% = SIN((ya% + i&) / 20) * 32 5 FOR xa% = 0 TO 254 6 z% = -z% 7 IF i& > 384 THEN PSET (32 + xa%, 36 + ya%), (xa% + xsin%) + Lsin%(ya% + 64 + z%) + Lsin%(xa% + ya%) 8 NEXT xa%, ya% 9 IF INKEY\$ = "" THEN 1```

Code:
```'Lovelier, Wobblier and Bigger!!!! 'by Jelly 1 IF i& = 0 THEN SCREEN 13 ELSE IF i& <= 256 THEN PALETTE i& - 1, 65536 * INT(32 - 31 * SIN(i& * 3.14151693# / 128)) + 256 * INT(32 - 31 * SIN(i& * 3.14151693# / 64)) + INT(32 - 31 * SIN(i& * 3.14151693# / 32)) 2 IF xa% = 0 THEN DIM Lsin%(256, 3) ELSE i& = (i& + 1) AND &H7FFFFFFF 3 FOR ya% = 0 TO 127 4 IF i& < 257 THEN Lsin%(i&, 0) = SIN((i&) / 30) * 60 ELSE xsin% = SIN((ya% + i&) / 20) * 50 5 FOR xa% = 0 TO 255 6 PSET (32 + xa%, 36 + ya%), (xa% + xsin%) XOR (ya% + (Lsin%((xa%), 0))) 7 NEXT xa%, ya% 8 IF INKEY\$ = "" THEN 1```

Note that I had to strain my brain just to get it to work fast enough and there is no colon joined line. ;*)
Waitasec...Relsoft, YOU'RE Jelly?
Great work.

Using the colon has it limitis, e.g. you can't do that much in terms of if statements/etc. Remeber pasco's climber that was using colons
Quote:Waitasec...Relsoft, YOU'RE Jelly?

:oops: :oops:
Eh????

I suspected you two were "related" after the 9-line compo at QBNZ, but you're actually the same person??

What, did you forget your password or something? LOL. Nahh. I was making my first entry, the "circle interference" while teaching my daughter how to read the ABC's. And my daughter kept on going back to "J" 'cause she likes the picture. Guess what? The pic on the letter J is Jelly. :*)

So I guess it stuck. :*)
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