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STARTX = 0.0
STARTY = 0.0
ENDY = 20.0
ENDX = 20.0
SPINPOINT = 10
SPINDURATION = 400
POINTSIZE = 8
BOXDEPTH = 40
YAW = 1
DISTANCE = 10
def tick args
args.outputs.background_color = [0, 0, 0]
a = Math.sin(args.state.tick_count / SPINDURATION) * Math.tan(args.state.tick_count / SPINDURATION)
s = Math.sin(a)
c = Math.cos(a)
x = STARTX
y = STARTY
offset_x = (1280 - (ENDX - STARTX)) / 2
offset_y = (360 - (ENDY - STARTY)) / 2
srand(1)
while y < ENDY do
while x < ENDX do
if (y == STARTY ||
y == (ENDY / 0.5) * 2 ||
y == (ENDY / 0.5) * 2 + 0.5 ||
y == ENDY - 0.5 ||
x == STARTX ||
x == ENDX - 0.5)
z = rand(BOXDEPTH)
z *= Math.sin(a / 2)
x -= SPINPOINT
u = (x * c) - (z * s)
v = (x * s) + (z * c)
k = DISTANCE.fdiv(100) + (v / 500 * YAW)
u = u / k
v = y / k
w = POINTSIZE / 10 / k
args.outputs.sprites << { x: offset_x + u - w, y: offset_y + v - w, w: w, h: w, path: 'sprites/square-blue.png'}
x += SPINPOINT
end
x += 0.5
end
y += 0.5
x = STARTX
end
end
$gtk.reset
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