Sha256: 678b8ee3a3195723c03db4cb172cfcdb347cf083f4fa355db94f6f3801af0aec
Contents?: true
Size: 985 Bytes
Versions: 4
Compression:
Stored size: 985 Bytes
Contents
#
# Star
#
# The star function created for this example is capable of drawing a
# wide range of different forms. Try placing different numbers into the
# star function calls within draw to explore.
#
def setup
size(640, 360)
end
def draw
background(102)
push_matrix
translate(width*0.2, height*0.5)
rotate(frame_count / 200.0)
star(0, 0, 5, 70, 3)
pop_matrix
push_matrix
translate(width*0.5, height*0.5)
rotate(frame_count / 50.0)
star(0, 0, 80, 100, 40)
pop_matrix
push_matrix
translate(width*0.8, height*0.5)
rotate(frame_count / -100.0)
star(0, 0, 30, 70, 5)
pop_matrix
end
def star(x, y, radius1, radius2, npoints)
angle = TWO_PI / npoints
half_angle = angle/2.0
begin_shape
(0 .. TWO_PI).step(angle) do |a|
sx = x + cos(a) * radius2
sy = y + sin(a) * radius2
vertex(sx, sy)
sx = x + cos(a + half_angle) * radius1
sy = y + sin(a + half_angle) * radius1
vertex(sx, sy)
end
end_shape(CLOSE)
end
Version data entries
4 entries across 4 versions & 1 rubygems