feat(test app): add new RNTA-based test app

Apps/BRNPlayground/.gitignore

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+*.binlog
+*.hprof
+*.zip
+.DS_Store
+.gradle/
+.idea/
+.vs/
+.xcode.env
+Pods/
+build/
+dist/
+local.properties
+msbuild.binlog
+node_modules/

Apps/BRNPlayground/.watchmanconfig

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+{}

Apps/BRNPlayground/App.tsx

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+/**
+ * Generated with the TypeScript template
+ * https://github.com/react-native-community/react-native-template-typescript
+ *
+ * @format
+ */
+
+import React, {
+  useState,
+  FunctionComponent,
+  useEffect,
+  useCallback,
+} from "react";
+import {
+  SafeAreaView,
+  StatusBar,
+  Button,
+  View,
+  Text,
+  ViewProps,
+  Image,
+} from "react-native";
+
+import {
+  EngineView,
+  useEngine,
+  EngineViewCallbacks,
+} from "@babylonjs/react-native";
+import {
+  Scene,
+  Vector3,
+  ArcRotateCamera,
+  Camera,
+  WebXRSessionManager,
+  SceneLoader,
+  TransformNode,
+  DeviceSourceManager,
+  DeviceType,
+  PointerInput,
+  WebXRTrackingState,
+  IMouseEvent,
+} from "@babylonjs/core";
+import "@babylonjs/loaders";
+import Slider from "@react-native-community/slider";
+
+const EngineScreen: FunctionComponent<ViewProps> = (props: ViewProps) => {
+  const defaultScale = 1;
+  const enableSnapshots = false;
+
+  const engine = useEngine();
+  const [toggleView, setToggleView] = useState(false);
+  const [camera, setCamera] = useState<Camera>();
+  const [rootNode, setRootNode] = useState<TransformNode>();
+  const [scene, setScene] = useState<Scene>();
+  const [xrSession, setXrSession] = useState<WebXRSessionManager>();
+  const [scale, setScale] = useState<number>(defaultScale);
+  const [snapshotData, setSnapshotData] = useState<string>();
+  const [engineViewCallbacks, setEngineViewCallbacks] =
+    useState<EngineViewCallbacks>();
+  const [trackingState, setTrackingState] = useState<WebXRTrackingState>();
+
+  useEffect(() => {
+    if (engine) {
+      const scene = new Scene(engine);
+      setScene(scene);
+      scene.createDefaultCamera(true);
+      (scene.activeCamera as ArcRotateCamera).beta -= Math.PI / 8;
+      setCamera(scene.activeCamera!);
+      scene.createDefaultLight(true);
+      const rootNode = new TransformNode("Root Container", scene);
+      setRootNode(rootNode);
+
+      const deviceSourceManager = new DeviceSourceManager(engine);
+      const handlePointerInput = (event: IMouseEvent) => {
+        if (event.inputIndex === PointerInput.Move && event.movementX) {
+          rootNode.rotate(Vector3.Down(), event.movementX * 0.005);
+        }
+      };
+
+      deviceSourceManager.onDeviceConnectedObservable.add((device) => {
+        if (device.deviceType === DeviceType.Touch) {
+          const touch = deviceSourceManager.getDeviceSource(
+            device.deviceType,
+            device.deviceSlot
+          )!;
+          touch.onInputChangedObservable.add((touchEvent) => {
+            handlePointerInput(touchEvent);
+          });
+        } else if (device.deviceType === DeviceType.Mouse) {
+          const mouse = deviceSourceManager.getDeviceSource(
+            device.deviceType,
+            device.deviceSlot
+          )!;
+          mouse.onInputChangedObservable.add((mouseEvent) => {
+            if (mouse.getInput(PointerInput.LeftClick)) {
+              handlePointerInput(mouseEvent);
+            }
+          });
+        }
+      });
+
+      const transformContainer = new TransformNode(
+        "Transform Container",
+        scene
+      );
+      transformContainer.parent = rootNode;
+      transformContainer.scaling.scaleInPlace(0.2);
+      transformContainer.position.y -= 0.2;
+
+      scene.beforeRender = function () {
+        transformContainer.rotate(
+          Vector3.Up(),
+          0.005 * scene.getAnimationRatio()
+        );
+      };
+
+      SceneLoader.ImportMeshAsync(
+        "",
+        "https://raw.githubusercontent.com/KhronosGroup/glTF-Sample-Models/master/2.0/BoxAnimated/glTF-Binary/BoxAnimated.glb"
+      ).then((result) => {
+        const mesh = result.meshes[0];
+        mesh.parent = transformContainer;
+      });
+    }
+  }, [engine]);
+
+  useEffect(() => {
+    if (rootNode) {
+      rootNode.scaling = new Vector3(scale, scale, scale);
+    }
+  }, [rootNode, scale]);
+
+  const trackingStateToString = (
+    trackingState: WebXRTrackingState | undefined
+  ): string => {
+    return trackingState === undefined ? "" : WebXRTrackingState[trackingState];
+  };
+
+  const onToggleXr = useCallback(() => {
+    (async () => {
+      if (xrSession) {
+        await xrSession.exitXRAsync();
+      } else {
+        if (rootNode !== undefined && scene !== undefined) {
+          const xr = await scene.createDefaultXRExperienceAsync({
+            disableDefaultUI: true,
+            disableTeleportation: true,
+          });
+          const session = await xr.baseExperience.enterXRAsync(
+            "immersive-ar",
+            "unbounded",
+            xr.renderTarget
+          );
+          setXrSession(session);
+          session.onXRSessionEnded.add(() => {
+            setXrSession(undefined);
+            setTrackingState(undefined);
+          });
+
+          setTrackingState(xr.baseExperience.camera.trackingState);
+          xr.baseExperience.camera.onTrackingStateChanged.add(
+            (newTrackingState) => {
+              setTrackingState(newTrackingState);
+            }
+          );
+
+          // TODO: Figure out why getFrontPosition stopped working
+          //box.position = (scene.activeCamera as TargetCamera).getFrontPosition(2);
+          const cameraRay = scene.activeCamera!.getForwardRay(1);
+          rootNode.position = cameraRay.origin.add(
+            cameraRay.direction.scale(cameraRay.length)
+          );
+          rootNode.rotate(Vector3.Up(), 3.14159);
+        }
+      }
+    })();
+  }, [rootNode, scene, xrSession]);
+
+  const onInitialized = useCallback(
+    async (engineViewCallbacks: EngineViewCallbacks) => {
+      setEngineViewCallbacks(engineViewCallbacks);
+    },
+    [engine]
+  );
+
+  const onSnapshot = useCallback(async () => {
+    if (engineViewCallbacks) {
+      setSnapshotData(
+        "data:image/jpeg;base64," + (await engineViewCallbacks.takeSnapshot())
+      );
+    }
+  }, [engineViewCallbacks]);
+
+  return (
+    <>
+      <View style={props.style}>
+        <Button
+          title="Toggle EngineView"
+          onPress={() => {
+            setToggleView(!toggleView);
+          }}
+        />
+        <Button
+          title={xrSession ? "Stop XR" : "Start XR"}
+          onPress={onToggleXr}
+        />
+        {!toggleView && (
+          <View style={{ flex: 1 }}>
+            {enableSnapshots && (
+              <View style={{ flex: 1 }}>
+                <Button title={"Take Snapshot"} onPress={onSnapshot} />
+                <Image style={{ flex: 1 }} source={{ uri: snapshotData }} />
+              </View>
+            )}
+            <EngineView
+              camera={camera}
+              onInitialized={onInitialized}
+              displayFrameRate={true}
+              antiAliasing={2}
+            />
+            <Slider
+              style={{
+                position: "absolute",
+                minHeight: 50,
+                margin: 10,
+                left: 0,
+                right: 0,
+                bottom: 0,
+              }}
+              minimumValue={0.2}
+              maximumValue={2}
+              step={0.01}
+              value={defaultScale}
+              onValueChange={setScale}
+            />
+            <Text style={{ color: "yellow", position: "absolute", margin: 3 }}>
+              {trackingStateToString(trackingState)}
+            </Text>
+          </View>
+        )}
+        {toggleView && (
+          <View
+            style={{ flex: 1, justifyContent: "center", alignItems: "center" }}
+          >
+            <Text style={{ fontSize: 24 }}>EngineView has been removed.</Text>
+            <Text style={{ fontSize: 12 }}>
+              Render loop stopped, but engine is still alive.
+            </Text>
+          </View>
+        )}
+      </View>
+    </>
+  );
+};
+
+const App = () => {
+  const [toggleScreen, setToggleScreen] = useState(false);
+
+  return (
+    <>
+      <StatusBar barStyle="dark-content" />
+      <SafeAreaView style={{ flex: 1, backgroundColor: "white" }}>
+        {!toggleScreen && <EngineScreen style={{ flex: 1 }} />}
+        {toggleScreen && (
+          <View
+            style={{ flex: 1, justifyContent: "center", alignItems: "center" }}
+          >
+            <Text style={{ fontSize: 24 }}>EngineScreen has been removed.</Text>
+            <Text style={{ fontSize: 12 }}>
+              Engine has been disposed, and will be recreated.
+            </Text>
+          </View>
+        )}
+        <Button
+          title="Toggle EngineScreen"
+          onPress={() => {
+            setToggleScreen(!toggleScreen);
+          }}
+        />
+      </SafeAreaView>
+    </>
+  );
+};
+
+export default App;

Apps/BRNPlayground/README.md

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+# BabylonReactNative Playground App
+
+This is a new example app for BabylonReactNative, based on `react-native-test-app`.
+
+It's still getting fully wired up as a replacement, so if you are seeing this message it means that it's not in its final form yet!
+
+To run it (on an Android device):
+
+1. `npm i`
+2. `npm run android`
+
+(assuming that you have your setup working for running [RN Android apps on device](https://reactnative.dev/docs/running-on-device?platform=android))

Apps/BRNPlayground/android/build.gradle

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+buildscript {
+    def androidTestAppDir = "../node_modules/react-native-test-app/android"
+    apply(from: "${androidTestAppDir}/dependencies.gradle")
+
+    repositories {
+        mavenCentral()
+        google()
+    }
+
+    dependencies {
+        getReactNativeDependencies().each { dependency ->
+            classpath(dependency)
+        }
+    }
+}
+
+allprojects {
+    repositories {
+        maven {
+            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
+            url("${rootDir}/../node_modules/react-native/android")
+        }
+        mavenCentral()
+        google()
+    }
+}

Apps/BRNPlayground/android/gradle.properties

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+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+
+# Specifies the JVM arguments used for the Gradle Daemon. The setting is
+# particularly useful for configuring JVM memory settings for build performance.
+# This does not affect the JVM settings for the Gradle client VM.
+# The default is `-Xmx512m -XX:MaxMetaspaceSize=256m`.
+org.gradle.jvmargs=-Xmx2g -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+
+# When configured, Gradle will fork up to org.gradle.workers.max JVMs to execute
+# projects in parallel. To learn more about parallel task execution, see the
+# section on Gradle build performance:
+# https://docs.gradle.org/current/userguide/performance.html#parallel_execution.
+# Default is `false`.
+#org.gradle.parallel=true
+
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app's APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
+# Jetifier randomly fails on these libraries
+android.jetifier.ignorelist=hermes-android
+
+# Use this property to specify which architecture you want to build.
+# You can also override it from the CLI using
+# ./gradlew <task> -PreactNativeArchitectures=x86_64
+reactNativeArchitectures=armeabi-v7a,arm64-v8a,x86,x86_64
+
+# Use this property to enable support to the new architecture.
+# This will allow you to use TurboModules and the Fabric render in
+# your application. You should enable this flag either if you want
+# to write custom TurboModules/Fabric components OR use libraries that
+# are providing them.
+# Note that this is incompatible with web debugging.
+#newArchEnabled=true
+
+# Uncomment the line below if building react-native from source
+#ANDROID_NDK_VERSION=26.1.10909125
+
+# Version of Kotlin to build against.
+#KOTLIN_VERSION=1.8.22