Created
August 11, 2023 01:12
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class C | |
def initialize | |
@size_x = 20 | |
@size_y = 20 | |
@dots = [] | |
@sushis = [] | |
end | |
def dot!(loc) | |
if 0 <= loc[0] && loc[0] < @size_x && | |
0 <= loc[1] && loc[1] < @size_y | |
@dots += [loc] | |
else | |
raise "Out of boundary: #{loc}" | |
end | |
end | |
def sushi!(loc) | |
if 0 <= loc[0] && loc[0] < @size_x && | |
0 <= loc[1] && loc[1] < @size_y | |
@sushis += [loc] | |
else | |
raise "Out of boundary: #{loc}" | |
end | |
end | |
# Bresenham's algorithm | |
def draw_line!(loc0, loc1) | |
if loc0 == loc1 | |
dot!(lot0) | |
return | |
end | |
sushi!(loc0) | |
sushi!(loc1) | |
(x0, y0) = loc0 | |
(x1, y1) = loc1 | |
dx = (x1 - x0).abs | |
dy = (y1 - y0).abs | |
step_x = x0 == x1 ? 0 : x0 < x1 ? 1 : -1 | |
step_y = y0 == y1 ? 0 : y0 < y1 ? 1 : -1 | |
# step_y = dy == 0 ? 0 : dy < 0 ? -1 : 1 | |
f = 0 | |
if dx > dy | |
y = y0 | |
x0.step(x1, step_x).each do |x| | |
if f > 0 | |
y += step_y | |
dot!([x, y]) | |
f += 2*dy - 2*dx | |
else | |
dot!([x, y]) | |
f += 2*dy | |
end | |
end | |
else | |
x = x0 | |
y0.step(y1, step_y).each do |y| | |
if f > 0 | |
x += step_x | |
dot!([x, y]) | |
f += 2*dx - 2*dy | |
else | |
dot!([x, y]) | |
f += 2*dx | |
end | |
end | |
end | |
rescue | |
p [loc0, loc1] | |
raise | |
end | |
def fill_rect!(loc0, loc1) | |
(x0, y0) = loc0 | |
(x1, y1) = loc1 | |
dx = x1 - x0 | |
dy = y1 - y0 | |
step_x = dx < 0 ? -1 : 1 | |
step_y = dy < 0 ? -1 : 1 | |
x0.step(x1, step_x).each do |x| | |
y0.step(y1, step_y) do |y| | |
dot!([x, y]) | |
end | |
end | |
end | |
def to_a | |
Array.new(@size_x) {|x| | |
Array.new(@size_y) {|y| | |
case [x, y] | |
when *@sushis | |
'🍣' | |
when *@dots | |
'⬛' | |
else | |
' ' | |
end | |
}.join('') + '|' | |
} | |
end | |
def to_s | |
[ | |
'--' * @size_x, | |
*to_a(), | |
'--' * @size_x, | |
].join("\n") | |
end | |
end | |
c = C.new | |
# c.draw_line!(*) | |
# puts c | |
# exit | |
c.draw_line!([rand(20), rand(20)], [rand(20), rand(20)]) | |
c.draw_line!([rand(20), rand(20)], [rand(20), rand(20)]) | |
c.draw_line!([0, 0], [19, 0]) | |
c.draw_line!([0, 0], [0, 19]) | |
c.draw_line!([19, 19], [19, 0]) | |
c.draw_line!([19, 19], [0, 19]) | |
# c.fill_rect!([rand(20), rand(20)], [rand(20), rand(20)]) | |
puts c.to_a |
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