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52 lines
1.2 KiB
52 lines
1.2 KiB
local unpack = table.unpack or _G.unpack
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math.randomseed(os.time())
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local function randab(a, b)
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return math.random() * (b-a) + a
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end
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local function randtable(n, a, b)
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local t = {}
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for i=1, n do
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t[i] = randab(a, b)
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end
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return t
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end
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local function choice(list)
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return list[math.random(1, #list)]
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end
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local function randomsphere()
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local pos = vec3.new(unpack(randtable(3, -2, 2)))
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local radius = randab(0, 0.5)
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local emission = colorvec.new(unpack(randtable(4, 0, 1)))
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local reflection = colormat.new(unpack(randtable(16, 0, 1)))
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local surfacetype = choice({surfacetype.DIFFUSE, surfacetype.REFLECTIVE, surfacetype.STOP})
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return obj.withmaterial(
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obj.sphere(pos, radius),
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material.new(emission, reflection, surfacetype)
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)
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end
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local function union(objs)
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local n = #objs
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if n == 1 then return objs[1] end
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local mid = n//2
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local left, right = {}, {}
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for i=1, mid do
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left[i] = objs[i]
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end
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for i=mid+1, n do
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right[i-mid] = objs[i]
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end
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return obj.union(union(left), union(right))
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end
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local spheres = {}
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for i=1, 100 do
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spheres[i] = randomsphere()
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end
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return union(spheres) |