drawcircle
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bored_hacker
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Posted: Sun May 29, 2005 2:04 pm Post subject: drawcircle |
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i got bored so i made this proc to draw a circle. its practically worthless except for the way you see it drawn, some people would think its cool.
code: | proc drawcircle (x, y, radius, col : int)
var i : real
for q : 0 .. 72000
i := q / 200
drawdot (round (cosd (i) * radius) + x, round (sind (i) * radius) + y, col)
end for
end drawcircle |
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Cervantes
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Posted: Sun May 29, 2005 3:10 pm Post subject: (No subject) |
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drawfillcircle
Turing: |
proc drawfillcircle (x, y, radius, clr : int)
var row : real := -radius %start at bottom of the circle
var col : real := 0. 0
var dir := 1 %1 is right, -1 is left
var dist : real
loop
dist := (row ** 2 + col ** 2) ** 0. 5
if dist <= radius then
drawdot (round (x + col ), round (y + row ), clr )
elsif dist >= radius then
dir * = - 1
row + = 1
loop %jump back into the circle
col + = dir
dist := (row ** 2 + col ** 2) ** 0. 5
exit when dist <= radius or row >= radius
end loop
end if
col + = dir
exit when row >= radius
end loop
end drawfillcircle
drawfillcircle (maxx div 2, maxy div 2, maxy div 2, green)
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Would be a lot faster with more math and using lines, mind you. Or even using math and pixels, but once you've figured out how far the pixels must go (given a certain row and radius, using some math) you could just draw a line of pixels. That would be a lot faster, I'd imagine. Someone else can give that a try.  |
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