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qb64/programs/samples/misc/rotozoom.bas
Luke Ceddia b586eafd3b Integrated _BLINEINPUT into regular LINE INPUT for BINARY files
LINE INPUT will now use the faster method if passed a file handle
that has been opened FOR BINARY. As such, the _BLINEINPUT command
has been removed.

qb64.bas now takes advantage of this for reading from '$include files,
at least in Include Manager 1. Some tweaking of internal/source/main.txt
was required to get things into a sane state, so I'm holing off changing
the compiler any further so the auto-builder can make sure everything's
smoothed over.

Note: Everything should still compile as normal; I'm just being overcautious.
2014-07-27 00:06:17 +10:00

14 lines
478 B
QBasic

' OPTIMIZED :) rotozoomer in 9 lines by Antoni Gual
'for Rel's 9 LINER contest at QBASICNEWS.COM 1/2003
'------------------------------------------------------------------------
1 SCREEN 13
2 ANG = ANG + .08
3 CS% = COS(ANG) * ABS(SIN(ANG)) * 128
4 ss% = SIN(ANG) * ABS(SIN(ANG)) * 128
5 FOR Y% = -100 TO 99
6 FOR X% = -160 TO 159
7 PSET (X% + 160, Y% + 100), (((X% * CS% - Y% * ss%) AND (Y% * CS% + X% * ss%)) \ 128)
8 NEXT X%, Y%
9 IF LEN(INKEY$) = 0 THEN 2