doodle.java2d.examples.BouncyCircles.scala Maven / Gradle / Ivy

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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 java2d
package examples

object BouncyCircles {
  import cats.implicits.*
  import doodle.core.*
  import doodle.core.format.Gif
  import doodle.syntax.all.*
  import doodle.java2d.effect.*
  import doodle.interact.easing.*
  import doodle.interact.syntax.all.*
  import fs2.Stream
  import cats.effect.IO
  import cats.effect.unsafe.implicits.global

  val frame = Frame.default.withSize(600, 600).withBackground(Color.darkMagenta)
  val steps = 60 * 10

  def bounce(easing: Easing): Stream[IO, Double] =
    easing.toStream(steps) ++
      easing.toStream(steps) ++
      easing.toStream(steps) ++
      easing.toStream(steps)

  val animation: Stream[IO, Picture[Unit]] =
    bounce(Easing.linear)
      .zip(bounce(Easing.quadratic))
      .zip(bounce(Easing.cubic))
      .zip(bounce(Easing.sin))
      .zip(bounce(Easing.circle))
      .zip(bounce(Easing.back))
      .map { case (((((r1, r2), r3), r4), r5), r6) =>
        circle(r1 * 85 + 10)
          .strokeColor(Color.magenta.spin(180.degrees))
          .at(r1 * 400 - 200, 250)
          .on(
            circle(r2 * 85 + 10)
              .strokeColor(Color.magenta.spin(170.degrees))
              .at(r2 * 400 - 200, 150)
          )
          .on(
            circle(r3 * 85 + 10)
              .strokeColor(Color.magenta.spin(140.degrees))
              .at(r3 * 400 - 200, 50)
          )
          .on(
            circle(r4 * 85 + 10)
              .strokeColor(Color.magenta.spin(150.degrees))
              .at(r4 * 400 - 200, -50)
          )
          .on(
            circle(r5 * 85 + 10)
              .strokeColor(Color.magenta.spin(140.degrees))
              .at(r5 * 400 - 200, -150)
          )
          .on(
            circle(r6 * 85 + 10)
              .strokeColor(Color.magenta.spin(120.degrees))
              .at(r6 * 400 - 200, -250)
          )
          .strokeWidth(2.0)
      }

  def go() =
    animation.animate(frame)

  def write() =
    animation.take(steps.toLong).write[Gif]("bouncy-circles.gif", frame)
}