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Trying to animate vector graphics using doodle library. / published by https://github.com/dacr/code-examples-manager #b6b3e414-1fea-47a1-8948-98fadb10b257/4516908852ab08297955bd8aa88572800d6cc13d
// summary : Trying to animate vector graphics using doodle library.
// keywords : scala, vector-graphics, doodle, examples, @testable
// publish : gist
// authors : Noel Welsh, David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : b6b3e414-1fea-47a1-8948-98fadb10b257
// created-on : 2019-06-25T21:04:29Z
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file
// ---------------------
//> using scala "3.4.2"
//> using dep "org.creativescala::doodle:0.10.1"
// ---------------------
// Example coming from doodle examples code (PulsingCircle.scala), author is Noel Welsh
// https://github.com/creativescala/doodle/blob/master/java2d/src/main/scala/doodle/java2d/examples/PulsingCircle.scala
object TryIt {
import cats.instances.all._
import doodle.core._
import doodle.effect.Writer.Gif
import doodle.syntax.all._
import doodle.java2d.effect._
import doodle.interact.syntax._
import fs2.Stream
import cats.effect.IO
import doodle.java2d._
import cats.effect.unsafe.implicits.global
val frame = Frame.size(600, 600).background(Color.darkMagenta)
val strokeWidth = 9.0
val gapWidth = 6.0
val minimumDiameter = gapWidth + strokeWidth
val maxNumberOfDisks = 15
def disk(count: Int): Picture[Unit] =
count match {
case 0 =>
circle[Algebra, Drawing](minimumDiameter.toDouble).noFill
.strokeWidth(strokeWidth)
case n =>
circle[Algebra, Drawing](
(n * 2 * (strokeWidth + gapWidth) + minimumDiameter)
).noFill
.strokeWidth(strokeWidth)
}
def background(count: Int): Picture[Unit] = {
def iter(count: Int): Picture[Unit] =
count match {
case 0 =>
disk(count)
case n =>
disk(count).on(iter(n - 1))
}
iter(count).strokeWidth(strokeWidth.toDouble).strokeColor(Color.darkGray)
}
def pulse(count: Int): Picture[Unit] =
count match {
case 0 => disk(0).strokeColor(Color.crimson)
case 1 =>
disk(1)
.strokeColor(Color.crimson)
.on(disk(0).strokeColor(Color.crimson.spin(30.degrees)))
case n =>
disk(n)
.strokeColor(Color.crimson)
.on(
disk(n - 1)
.strokeColor(Color.crimson.spin(30.degrees))
)
.on(
disk(n - 2)
.strokeColor(Color.crimson.spin(60.degrees))
)
}
val animation: Stream[IO, Picture[Unit]] =
Stream(1).repeat
.scan((1, 0)) { (state, _) =>
val (inc, count) = state
if (count >= maxNumberOfDisks) (-1, maxNumberOfDisks - 1)
else if (count <= 0) (1, 1)
else (inc, count + inc)
}
.map { case (_, c) => pulse(c).on(background(maxNumberOfDisks)) }
def go() =
animation.animate(frame)
def write() =
animation.take(maxNumberOfDisks * 2).write[Gif]("bouncy-circles.gif", frame)
}
//TryIt.go()
//scala.io.StdIn.readLine("Enter to exit...") // required when run as a script
TryIt.write()
//scala.io.StdIn.readLine("Enter to exit...") // required when run as a script
//System.exit(0)
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