aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

Data commit

Browse source
This commit is contained in:
Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

43
Task/Bitmap-Midpoint-circle-algorithm/BBC-BASIC/bitmap-midpoint-circle-algorithm.basic Normal file
View file

@ -0,0 +1,43 @@
Width% = 200
Height% = 200
REM Set window size:
VDU 23,22,Width%;Height%;8,16,16,128
REM Draw circles:
PROCcircle(100,100,40, 0,0,0)
PROCcircle(100,100,80, 255,0,0)
END
DEF PROCcircle(cx%,cy%,r%,R%,G%,B%)
LOCAL f%, x%, y%, ddx%, ddy%
f% = 1 - r% : y% = r% : ddy% = - 2*r%
PROCsetpixel(cx%, cy%+r%, R%,G%,B%)
PROCsetpixel(cx%, cy%-r%, R%,G%,B%)
PROCsetpixel(cx%+r%, cy%, R%,G%,B%)
PROCsetpixel(cx%-r%, cy%, R%,G%,B%)
WHILE x% < y%
IF f% >= 0 THEN
y% -= 1
ddy% += 2
f% += ddy%
ENDIF
x% += 1
ddx% += 2
f% += ddx% + 1
PROCsetpixel(cx%+x%, cy%+y%, R%,G%,B%)
PROCsetpixel(cx%-x%, cy%+y%, R%,G%,B%)
PROCsetpixel(cx%+x%, cy%-y%, R%,G%,B%)
PROCsetpixel(cx%-x%, cy%-y%, R%,G%,B%)
PROCsetpixel(cx%+y%, cy%+x%, R%,G%,B%)
PROCsetpixel(cx%-y%, cy%+x%, R%,G%,B%)
PROCsetpixel(cx%+y%, cy%-x%, R%,G%,B%)
PROCsetpixel(cx%-y%, cy%-x%, R%,G%,B%)
ENDWHILE
ENDPROC
DEF PROCsetpixel(x%,y%,r%,g%,b%)
COLOUR 1,r%,g%,b%
GCOL 1
LINE x%*2,y%*2,x%*2,y%*2
ENDPROC