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Acorn Arcade forums: Programming: Drawing symmetrical objects symmetrically
 
  Drawing symmetrical objects symmetrically
  Cauchy (18:50 20/8/2018)
 
John O'Meara Message #124329, posted by Cauchy at 18:50, 20/8/2018
Member
Posts: 43
Enter into BASIC and in immediate mode type the following code. Please.
VDU 29, 639;400;
MOVE -100,0
DRAW -99,-40
MOVE 100,0
DRAW 99,40
REM At this stage the two "curves" are not
REM drawn symmetrically about (0,0)although their coordinates are. We continue
MOVE -99,-40
DRAW -98,-80
MOVE 99,40
DRAW 98,80
MOVE -98,-80
DRAW -97,-120
MOVE 98,80
DRAW 97,120
ETC.
When I try to draw my own circle using BASIC, at first glance the drawn circle may look symmetrical but on inspection it is not. BASIC's CIRCLE command does draw circles symmetrically. I used to be able to do too a long while ago but have now forgotten how. Could any one please help. Thank you.
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Acorn Arcade forums: Programming: Drawing symmetrical objects symmetrically