solar system

solar-system/app/src/main/java/it/norangeb/solarsystem/MainActivity.kt

@@ -25,15 +25,19 @@ import android.support.v7.app.AppCompatActivity
 import android.view.MotionEvent
 import com.google.ar.core.HitResult
 import com.google.ar.core.Plane
+import com.google.ar.sceneform.Node
+import com.google.ar.sceneform.math.Vector3
 import com.google.ar.sceneform.rendering.ModelRenderable
 import com.google.ar.sceneform.ux.ArFragment
 import kotlinx.coroutines.*
 
 class MainActivity : AppCompatActivity() {
     private val TAG = MainActivity::class.java.canonicalName
+    private val AU_TO_METERS = 1.1f
+
     private lateinit var arFragment: ArFragment
     private var isModelAdded = false
-    private lateinit var planets: Map<Planet, ModelRenderable>
+    private lateinit var renderablePlanets: Map<Planet, ModelRenderable>
     private lateinit var loadPlanetsJob: Job
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -46,16 +50,64 @@ class MainActivity : AppCompatActivity() {
         arFragment = supportFragmentManager.findFragmentById(R.id.ar_fragment) as ArFragment
 
         loadPlanetsJob = GlobalScope.launch(Dispatchers.Main) {
-            planets = loadPlanets(this@MainActivity)
+            renderablePlanets = loadPlanets(this@MainActivity)
         }
 
         arFragment.setOnTapArPlaneListener(this::placeSolarSystem)
     }
 
     private fun placeSolarSystem(hitResult: HitResult, plane: Plane, motionEvent: MotionEvent) {
+        if (isModelAdded)
+            return
+
         GlobalScope.launch(Dispatchers.Main) {
             loadPlanetsJob.join()
-            addTransformableNodeToScene(arFragment, hitResult.createAnchor(), planets[Planet.EARTH]!!)
+            val solarSystem = createSolarSystem(renderablePlanets)
+            addNodeToScene(arFragment, hitResult.createAnchor(), solarSystem)
+            isModelAdded = true
         }
     }
+
+    private fun createSolarSystem(renderablePlanets: Map<Planet, ModelRenderable>): Node {
+        val base = Node()
+
+        val sun = Node()
+        sun.setParent(base)
+        sun.localPosition = Vector3(0.0f, 0.5f, 0.0f)
+
+        val sunVisual = Node()
+        sunVisual.setParent(sun)
+        sunVisual.renderable = renderablePlanets[Planet.SUN]
+        sunVisual.localScale = Vector3(0.5f, 0.5f, 0.5f)
+
+        createPlanetNode(Planet.MERCURY, sun, 0.4f, 47f, renderablePlanets)
+        createPlanetNode(Planet.VENUS, sun, 0.7f, 35f, renderablePlanets)
+        createPlanetNode(Planet.EARTH, sun, 1.0f, 29f, renderablePlanets)
+        createPlanetNode(Planet.MARS, sun, 1.5f, 24f, renderablePlanets)
+        createPlanetNode(Planet.JUPITER, sun, 2.2f, 13f, renderablePlanets)
+        createPlanetNode(Planet.SATURN, sun, 3.5f, 9f, renderablePlanets)
+        createPlanetNode(Planet.URANUS, sun, 5.2f, 7f, renderablePlanets)
+        createPlanetNode(Planet.NEPTUNE, sun, 6.1f, 5f, renderablePlanets)
+
+        return base
+    }
+
+    private fun createPlanetNode(
+        planet: Planet,
+        parent: Node,
+        auFromParent: Float,
+        orbitDegreesPerSecond: Float,
+        renderablePlanets: Map<Planet, ModelRenderable>
+    ) {
+        val orbit = RotationNode()
+        orbit.degreesPerSecond = orbitDegreesPerSecond
+        orbit.setParent(parent)
+
+        val renderable = renderablePlanets[planet] ?: return
+        val planetNode = PlanetNode(renderable)
+        planetNode.setParent(orbit)
+        planetNode.localPosition = Vector3(AU_TO_METERS * auFromParent, 0.0f, 0.0f)
+    }
+
+
 }

solar-system/app/src/main/java/it/norangeb/solarsystem/PlanetNode.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2019, norangebit
+ *
+ * This file is part of solar-system.
+ *
+ *      solar-system is free software: you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation, either version 3 of the License, or
+ *      (at your option) any later version.
+ *
+ *      solar-system is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with solar-system.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+package it.norangeb.solarsystem
+
+import com.google.ar.sceneform.FrameTime
+import com.google.ar.sceneform.Node
+import com.google.ar.sceneform.math.Vector3
+import com.google.ar.sceneform.rendering.ModelRenderable
+
+class PlanetNode(
+    private val planetRenderable: ModelRenderable
+) : Node() {
+    private val planetScale = 0.6f
+    private var planetVisual: RotationNode? = null
+
+    override fun onActivate() {
+        if (scene == null)
+            throw IllegalStateException("Scene is null!")
+
+        if (planetVisual == null)
+            initRotationNode()
+
+    }
+
+    override fun onUpdate(frameTime: FrameTime?) {
+        if (scene == null)
+            return
+    }
+
+    fun initRotationNode() {
+        planetVisual = RotationNode(false)
+        planetVisual?.setParent(this)
+        planetVisual?.renderable = planetRenderable
+        planetVisual?.localScale = Vector3(planetScale, planetScale, planetScale)
+    }
+}

solar-system/app/src/main/java/it/norangeb/solarsystem/RotationNode.kt

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2019, norangebit
+ *
+ * This file is part of solar-system.
+ *
+ *      solar-system is free software: you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation, either version 3 of the License, or
+ *      (at your option) any later version.
+ *
+ *      solar-system is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with solar-system.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+package it.norangeb.solarsystem
+
+import android.animation.ObjectAnimator
+import android.view.animation.LinearInterpolator
+import com.google.ar.sceneform.FrameTime
+import com.google.ar.sceneform.Node
+import com.google.ar.sceneform.math.Quaternion
+import com.google.ar.sceneform.math.QuaternionEvaluator
+import com.google.ar.sceneform.math.Vector3
+
+class RotationNode(private val isOrbit: Boolean = true) : Node() {
+    val SPEED_MULTIPLIER = 1
+    val ROTATION_MULTIPLIER = 1
+
+    private var orbitAnimation: ObjectAnimator? = null
+    var degreesPerSecond = 90.0f
+
+    private val animationDuration: Long
+        get() = (1000 * 360 / (degreesPerSecond * if (isOrbit)
+            SPEED_MULTIPLIER
+        else
+            ROTATION_MULTIPLIER))
+            .toLong()
+
+    override fun onUpdate(frameTime: FrameTime?) {
+        super.onUpdate(frameTime)
+
+        if (orbitAnimation == null)
+            return
+    }
+
+    override fun onActivate() {
+        startAnimation()
+    }
+
+    override fun onDeactivate() {
+        stopAnimation()
+    }
+
+    private fun startAnimation() {
+        if (orbitAnimation != null) {
+            return
+        }
+        orbitAnimation = createAnimator()
+        orbitAnimation!!.target = this
+        orbitAnimation!!.duration = animationDuration
+        orbitAnimation!!.start()
+    }
+
+    private fun stopAnimation() {
+        if (orbitAnimation == null) {
+            return
+        }
+        orbitAnimation!!.cancel()
+        orbitAnimation = null
+    }
+
+    private fun createAnimator(): ObjectAnimator {
+        val orientation1 = Quaternion.axisAngle(Vector3(0.0f, 1.0f, 0.0f), 0f)
+        val orientation2 = Quaternion.axisAngle(Vector3(0.0f, 1.0f, 0.0f), 120f)
+        val orientation3 = Quaternion.axisAngle(Vector3(0.0f, 1.0f, 0.0f), 240f)
+        val orientation4 = Quaternion.axisAngle(Vector3(0.0f, 1.0f, 0.0f), 360f)
+
+        val orbitAnimation = ObjectAnimator()
+        orbitAnimation.setObjectValues(orientation1, orientation2, orientation3, orientation4)
+
+        orbitAnimation.propertyName = "localRotation"
+
+        orbitAnimation.setEvaluator(QuaternionEvaluator())
+
+        orbitAnimation.repeatCount = ObjectAnimator.INFINITE
+        orbitAnimation.repeatMode = ObjectAnimator.RESTART
+        orbitAnimation.interpolator = LinearInterpolator()
+        orbitAnimation.setAutoCancel(true)
+
+        return orbitAnimation
+    }
+}

solar-system/app/src/main/java/it/norangeb/solarsystem/Util.kt

@@ -34,7 +34,6 @@ import com.google.ar.sceneform.Node
 import com.google.ar.sceneform.assets.RenderableSource
 import com.google.ar.sceneform.rendering.*
 import com.google.ar.sceneform.ux.ArFragment
-import com.google.ar.sceneform.ux.TransformableNode
 import kotlinx.coroutines.Deferred
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
@@ -98,9 +97,9 @@ fun loadPlanet(context: Context, planet: Planet): Deferred<ModelRenderable> {
     )
 
     return GlobalScope.async(Dispatchers.IO) {
-        threadLog("start load: $planet")
+        threadLog("start loading: $planet")
         val renderable = futureRenderable.get()
-        threadLog("end load: $planet")
+        threadLog("end loading: $planet")
         renderable
     }
 }
@@ -124,14 +123,10 @@ fun fetchModel(
         .setRecenterMode(RenderableSource.RecenterMode.ROOT)
         .build()
 
-fun addTransformableNodeToScene(arFragment: ArFragment, anchor: Anchor, renderable: ModelRenderable): Node {
+fun addNodeToScene(arFragment: ArFragment, anchor: Anchor, node: Node) {
     val anchorNode = AnchorNode(anchor)
-    val transformableNode = TransformableNode(arFragment.transformationSystem)
+    anchorNode.addChild(node)
-    transformableNode.renderable = renderable
-    transformableNode.setParent(anchorNode)
     arFragment.arSceneView.scene.addChild(anchorNode)
-    transformableNode.select()
-    return transformableNode
 }
 
 enum class Planet(val value: String) {