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Stars.scala
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Stars.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 cats.instances.list._
import doodle.core._
import doodle.image.Image
import doodle.image.syntax.all._
import doodle.syntax.all._
object Stars {
def star(sides: Int, skip: Int, radius: Double) = {
import PathElement._
val centerAngle = 360.degrees * skip.toDouble / sides.toDouble
val elements = (0 to sides) map { index =>
val pt = Point.polar(radius, centerAngle * index.toDouble)
if (index == 0)
moveTo(pt)
else
lineTo(pt)
}
Image
.openPath(elements)
.strokeWidth(2)
.strokeColor(Color.hsl(centerAngle, 1, .25))
.fillColor(Color.hsl(centerAngle, 1, .75))
}
val image =
((3 to 33 by 2) map { sides =>
((1 to sides / 2) map { skip =>
star(sides, skip, 20)
}).toList.allBeside
}).toList.allAbove
}