85 lines
2.5 KiB
Kotlin
85 lines
2.5 KiB
Kotlin
/*
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* Copyright (c) 2019, norangebit
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*
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* This file is part of solar-system.
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*
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* solar-system is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* solar-system is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with solar-system. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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package it.norangeb.solarsystem
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import android.animation.ObjectAnimator
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import android.view.animation.LinearInterpolator
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import com.google.ar.sceneform.Node
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import com.google.ar.sceneform.math.Quaternion
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import com.google.ar.sceneform.math.QuaternionEvaluator
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import com.google.ar.sceneform.math.Vector3
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class RotationNode : Node() {
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private val DEGREE = 360000
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private var orbitAnimation: ObjectAnimator? = null
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var degreesPerSecond = 90.0f
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private val animationDuration: Long
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get() = (DEGREE / degreesPerSecond)
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.toLong()
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override fun onActivate() {
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startAnimation()
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}
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override fun onDeactivate() {
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stopAnimation()
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}
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private fun startAnimation() {
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if (orbitAnimation != null)
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return
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orbitAnimation = createAnimator()
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orbitAnimation!!.target = this
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orbitAnimation!!.duration = animationDuration
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orbitAnimation!!.start()
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}
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private fun stopAnimation() {
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if (orbitAnimation == null)
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return
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orbitAnimation!!.cancel()
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orbitAnimation = null
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}
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private fun createAnimator(): ObjectAnimator {
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val orientations = arrayOf(0f, 120f, 240f, 360f)
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.map { Quaternion.axisAngle(Vector3(0.0f, 1.0f, 0.0f), it) }
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val orbitAnimation = ObjectAnimator()
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orbitAnimation.setObjectValues(*orientations.toTypedArray())
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orbitAnimation.propertyName = "localRotation"
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orbitAnimation.setEvaluator(QuaternionEvaluator())
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orbitAnimation.repeatCount = ObjectAnimator.INFINITE
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orbitAnimation.repeatMode = ObjectAnimator.RESTART
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orbitAnimation.interpolator = LinearInterpolator()
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orbitAnimation.setAutoCancel(true)
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return orbitAnimation
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}
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}
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