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ConcentricCircles.scala
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ConcentricCircles.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.syntax.all._
object ConcentricCircles {
def fade(n: Int): Image =
singleCircle(n).strokeColor(Color.red fadeOut (n / 20.0).normalized)
def gradient(n: Int): Image =
singleCircle(n).strokeColor(Color.royalBlue.spin((n * 15).degrees))
def singleCircle(n: Int): Image =
Image.circle(50.0 + 7 * n).strokeWidth(3.0)
def concentricCircles(n: Int): Image =
n match {
case 0 => singleCircle(n)
case n => singleCircle(n) on concentricCircles(n - 1)
}
def fadeCircles(n: Int): Image =
n match {
case 0 => fade(n)
case n => fade(n) on fadeCircles(n - 1)
}
def gradientCircles(n: Int): Image =
n match {
case 0 => gradient(n)
case n => gradient(n) on gradientCircles(n - 1)
}
def image: Image =
concentricCircles(20).strokeColor(Color.royalBlue)
def fade: Image =
fadeCircles(20)
def gradient: Image =
gradientCircles(20)
}