Sha256: d8fd27f4fe53a0627b42a7f120bbb518f8f4b4118298492db71b00afe3187d77
Contents?: true
Size: 671 Bytes
Versions: 10
Compression:
Stored size: 671 Bytes
Contents
# Increment Decrement.
#
# In Java and C ...
# Writing "a++" is equivalent to "a = a + 1".
# Writing "a--" is equivalent to "a = a - 1".
# In Ruby there is += 1 and -= 1:
# a += 1 is equal to a = a + 1
def setup
size 640, 360
color_mode RGB, width
@a = 0
@b = width
@direction = false
frame_rate 30
end
def draw
@a += 1
if @a > width
@a = 0
@direction = !@direction
end
if @direction
stroke @a
else
stroke width-@a
end
line @a, 0, @a, height/2
@b -= 1
@b = width if @b < 0
if @direction
stroke width-@b
else
stroke @b
end
line @b, height/2+1, @b, height
end
Version data entries
10 entries across 10 versions & 1 rubygems