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SierpinskiConfection.scala
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SierpinskiConfection.scala
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/*
* Copyright 2015 Creative Scala
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package doodle
package image
package examples
import doodle.core._
import doodle.image.Image
import doodle.random._
import doodle.syntax.all._
object SierpinskiConfection {
val reddish: Random[Color] = {
val hue = Random.double map { d =>
(d - 0.5) * 0.2
}
val saturation = Random.double map { s =>
s * 0.3 + 0.4
}
val lightness = Random.double map { l =>
l * 0.3 + 0.3
}
for {
h <- hue
s <- saturation
l <- lightness
} yield Color.hsl(h.turns, s, l)
}
def triangle(size: Double): Image = {
Image.triangle(size, size)
}
def circle(size: Double): Image = {
Image.circle(size)
}
def shape(size: Double): Random[Image] = {
for {
s <- Random.oneOf(triangle(size), circle(size))
h <- reddish
} yield s fillColor h
}
def sierpinski(n: Int, size: Double): Random[Image] = {
if (n == 1) {
shape(size)
} else {
val smaller = sierpinski(n - 1, size / 2)
for {
a <- smaller
b <- smaller
c <- smaller
} yield a above (b beside c)
}
}
val image = sierpinski(5, 512).run
}