add android integration & make iOS API consistent

add pubspec android plugin

update android CMakeLists

add filament android libs for linking

android/CMakeLists.txt

@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.4.1)  
+
+include_directories(../ios/src)
+include_directories(../ios/include)
+include_directories(src/main/cpp)
+link_directories(src/main/libs/${ANDROID_ABI}) # don't use jniLibs here because we just want to link against these libraries, the actual .so files will be copied by the AAR dependencies
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
+add_library( 
+            filament_interop
+            SHARED
+            src/main/cpp/filament_api.cpp
+            ../ios/src/FilamentViewer.cpp
+            # ../ios/src/Utils.cpp
+            # ../ios/src/HDRLoader.cpp
+            # ../ios/include/common/NioUtils.cpp
+            #../ios/src/morph/GPUMorphHelper.cpp
+        )
+
+
+target_link_libraries(filament_interop -landroid -llog -lfilament-jni -lfilament-utils-jni -lgltfio-jni )
+

android/build.gradle

@@ -2,7 +2,7 @@ group 'app.polyvox.filament'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.6.0'
     repositories {
         google()
         mavenCentral()
@@ -23,9 +23,14 @@ rootProject.allprojects {
 
 apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
+
+    //ndkVersion '21.1.6352462'
+    ndkVersion '23.1.7779620'
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -41,10 +46,23 @@ android {
     }
 
     defaultConfig {
-        minSdkVersion 16
+        minSdkVersion 21
+    }
+
+    
+    externalNativeBuild {
+        cmake {
+            path "CMakeLists.txt"
+        }
     }
 }
 
 dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+    compile 'net.java.dev.jna:jna:5.10.0@aar'
+    implementation "com.google.android.filament:filament-android:1.17.0"
+    implementation "com.google.android.filament:filament-utils-android:1.17.0"
+    implementation "com.google.android.filament:gltfio-android:1.17.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.2"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.2"
 }

android/settings.gradle

@@ -1 +1 @@
-rootProject.name = 'filament'
+rootProject.name = 'polyvox_filament'

android/src/main/cpp/filament_api.cpp

@@ -0,0 +1,146 @@
+#include "FilamentViewer.hpp"
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+#include <android/native_window_jni.h>
+#include <android/log.h>
+#include <android/native_activity.h>
+
+using namespace polyvox;
+
+static AAssetManager* am;
+
+std::vector<AAsset*> _assets;
+uint64_t id = -1;
+
+static polyvox::ResourceBuffer loadResource(const char* name) {
+
+    id++;
+  
+    AAsset *asset = AAssetManager_open(am, name, AASSET_MODE_BUFFER);
+    if(asset == nullptr) {
+      __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Couldn't locate asset [ %s ]", name);
+      return polyvox::ResourceBuffer(nullptr, 0, 0);
+    }
+    __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Loading asset [ %s ]", name);
+    off_t length = AAsset_getLength(asset);
+    const void * buffer = AAsset_getBuffer(asset);
+    __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Read [ %lu ] bytes into buffer", length);
+    _assets.push_back(asset);
+    __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Loaded asset [ %s ] of length %zu", name, length);
+    return ResourceBuffer(buffer, length, id);
+
+}
+
+static void freeResource(ResourceBuffer rb) {
+  AAsset_close(_assets.at(rb.id));
+}
+
+extern "C" {
+
+  void load_skybox(void* viewer, const char* skyboxPath, const char* iblPath) {
+    ((FilamentViewer*)viewer)->loadSkybox(skyboxPath, iblPath, am);
+  }
+
+  void load_glb(void* viewer, const char* assetPath) {
+    ((FilamentViewer*)viewer)->loadGlb(assetPath);
+  }
+
+  void load_gltf(void* viewer, const char* assetPath, const char* relativePath) {
+    ((FilamentViewer*)viewer)->loadGltf(assetPath, relativePath);
+  }
+
+  void set_camera(void* viewer, const char* nodeName) {
+    ((FilamentViewer*)viewer)->setCamera(nodeName);
+  }
+
+  void* filament_viewer_new(
+    jobject surface,
+    const char* opaqueShaderPath, 
+    const char* fadeShaderPath,
+    JNIEnv* env,
+    jobject assetManager
+  ) {
+    ANativeWindow* layer = ANativeWindow_fromSurface(env, surface);
+    am = AAssetManager_fromJava(env, assetManager);
+    
+    return new FilamentViewer((void*)layer, opaqueShaderPath, fadeShaderPath, loadResource, freeResource);
+  }
+
+  void render(
+    void* viewer
+  ) {
+    ((FilamentViewer*)viewer)->render();
+  }
+
+  void destroy_swap_chain(void* viewer) {
+    ((FilamentViewer*)viewer)->destroySwapChain();
+  }
+
+  void create_swap_chain(void* viewer, jobject surface, JNIEnv* env) {
+    ANativeWindow* layer = ANativeWindow_fromSurface(env, surface);
+    if(!layer) {
+      __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Couldn't get native window from surface");     
+      return;
+    }
+    ((FilamentViewer*)viewer)->createSwapChain(layer);
+  }
+
+  void* get_renderer(void* viewer) {
+    return ((FilamentViewer*)viewer)->getRenderer();
+  }
+
+  void update_viewport_and_camera_projection(void* viewer, int width, int height, float scaleFactor) {
+    return ((FilamentViewer*)viewer)->updateViewportAndCameraProjection(width, height, scaleFactor);
+    
+  }
+
+  void scroll(void* viewer, float x, float y , float z) {
+    return ((FilamentViewer*)viewer)->manipulator->scroll(x, y, z);
+  }
+
+  void grab_begin(void* viewer, int x, int y, bool pan) {
+      __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Grab begin at %d %d %d", x, y, pan);     
+    ((FilamentViewer*)viewer)->manipulator->grabBegin(x, y, pan);
+
+  }
+
+  void grab_update(void* viewer, int x, int y) {
+    __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Grab update at %d %d %d", x, y);     
+    ((FilamentViewer*)viewer)->manipulator->grabUpdate(x, y);
+  }
+
+  void grab_end(void* viewer) {
+    ((FilamentViewer*)viewer)->manipulator->grabEnd();
+  }
+
+  void apply_weights(void* viewer, float* weights, int count) {
+    ((FilamentViewer*)viewer)->applyWeights(weights, count);
+  }
+
+  void get_target_names(void* viewer, char* meshName, char*** outPtr, int* countPtr ) {
+    StringList names = ((FilamentViewer*)viewer)->getTargetNames(meshName);
+         
+    *countPtr = names.count;
+    
+	  *outPtr = (char**)malloc(sizeof(char*) * names.count);
+
+    __android_log_print(ANDROID_LOG_VERBOSE, "filament_api", "Got %d names", names.count);     
+    
+    for(int i = 0; i < names.count; i++) {
+      std::string as_str(names.strings[i]);      
+      (*outPtr)[i] = (char*)malloc(sizeof(char) * as_str.length());
+	    strcpy((*outPtr)[i], as_str.c_str());
+    }
+  }
+
+  void free_pointer(void** ptr, int size) {
+    for(int i = 0; i < size; i++) {
+      free(ptr[i]);
+    }
+  }
+
+  void release_source_assets(void* viewer) {
+    ((FilamentViewer*)viewer)->releaseSourceAssets();
+  }
+  
+}

android/src/main/cpp/filament_api.h

@@ -0,0 +1,15 @@
+#include "FilamentViewer.hpp"
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+#include <android/native_window_jni.h>
+#include <android/log.h>
+
+void load_skybox(void* viewer, const char* skyboxPath, const char* iblPath);
+
+void* filament_viewer_new(
+    void* layer, 
+    const char* opaqueShaderPath, 
+    const char* fadeShaderPath, 
+    void* assetManager
+);
+}

android/src/main/kotlin/app/polyvox/filament/FilamentInterop.kt

@@ -0,0 +1,61 @@
+package app.polyvox.filament 
+
+import com.sun.jna.Library
+import com.sun.jna.Native
+import com.sun.jna.Pointer
+import com.sun.jna.ptr.PointerByReference
+import com.sun.jna.ptr.IntByReference
+import com.sun.jna.Structure
+import com.sun.jna.NativeLibrary
+import com.sun.jna.StringArray
+import com.sun.jna.JNIEnv
+
+import android.view.Surface
+
+import android.content.res.AssetManager 
+
+import java.nio.ByteBuffer
+
+interface FilamentInterop : Library {
+
+    fun filament_viewer_new(
+            layer:Object,
+            opaqueShaderPath:String,
+            fadeShaderPath:String,
+            env:JNIEnv,
+            am:AssetManager
+    ) : Pointer;
+
+    fun load_skybox(viewer:Pointer, skyboxPath:String, iblPath:String) : Pointer;
+
+    fun load_glb(viewer:Pointer, uri:String) : Pointer;
+
+    fun load_gltf(viewer:Pointer, uri:String, relativeResourcePath:String) : Pointer;
+    
+    fun set_camera(viewer:Pointer, nodeName:String) : Pointer;
+
+    fun render(viewer:Pointer);
+
+    fun create_swap_chain(viewer:Pointer, surface:Surface, env:JNIEnv);
+
+    fun destroy_swap_chain(viewer:Pointer);
+
+    fun update_viewport_and_camera_projection(viewer:Pointer, width:Int, height:Int, scaleFactor:Float);
+
+    fun scroll(viewer:Pointer, x:Float, y:Float, z:Float);
+
+    fun grab_begin(viewer:Pointer, x:Int, y:Int, pan:Boolean)
+
+    fun grab_update(viewer:Pointer, x:Int, y:Int)
+
+    fun grab_end(viewer:Pointer)
+
+    fun apply_weights(viewer:Pointer, weights:FloatArray, size:Int);
+
+    fun get_target_names(viewer:Pointer, meshName:String, outPtr:PointerByReference, outLen:IntByReference);
+
+    fun free_pointer(ptr:Pointer, size:Int)
+
+    fun release_source_assets(viewer:Pointer)
+
+}

android/src/main/kotlin/app/polyvox/filament/FilamentView.kt

@@ -0,0 +1,298 @@
+package app.polyvox.filament
+import android.content.res.AssetManager 
+
+import android.Manifest
+import android.app.Activity
+import android.content.Context
+import android.content.pm.PackageManager
+import android.graphics.Color
+import android.graphics.SurfaceTexture
+import android.graphics.PixelFormat
+
+import io.flutter.FlutterInjector
+
+import android.opengl.GLU
+import javax.microedition.khronos.egl.EGLConfig
+import javax.microedition.khronos.opengles.GL10
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+import java.nio.FloatBuffer
+import android.hardware.Camera
+import android.opengl.GLSurfaceView
+import android.view.SurfaceView
+import android.view.TextureView
+import android.view.View
+import android.view.Surface
+import android.widget.TextView
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import androidx.lifecycle.DefaultLifecycleObserver
+import io.flutter.plugin.common.BinaryMessenger
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.platform.PlatformView
+import java.io.IOException
+
+import android.util.Log
+
+import com.sun.jna.Library
+import com.sun.jna.Native
+import com.sun.jna.Pointer
+import com.sun.jna.ptr.PointerByReference
+import com.sun.jna.ptr.IntByReference
+import com.sun.jna.Structure
+import com.sun.jna.NativeLibrary
+import com.sun.jna.StringArray
+import com.sun.jna.JNIEnv
+
+import android.R.attr.path
+
+import java.util.Collections;
+
+import com.google.android.filament.android.DisplayHelper
+
+import android.hardware.display.DisplayManager
+       
+import com.google.android.filament.android.*
+import com.google.android.filament.*
+import com.google.android.filament.SwapChain
+import com.google.android.filament.utils.*
+
+import android.view.Choreographer
+import android.view.SurfaceHolder
+
+
+class FilamentView(
+    private val viewId: Int,
+    private val context: Context,
+    private val activity: Activity,
+    private val binaryMessenger: BinaryMessenger,
+    private val creationParams : Map<String?, Any?>?
+)  : DefaultLifecycleObserver, 
+MethodChannel.MethodCallHandler, 
+PlatformView  {
+
+    companion object {
+        const val TAG = "FilamentView"
+    }
+
+    private val _view = SurfaceView(context)
+
+    override fun getView(): View {
+        return _view
+    }
+
+    private val _methodChannel: MethodChannel
+
+    private lateinit var _lib : FilamentInterop
+
+    private var _viewer : Pointer? = null
+
+    private lateinit var choreographer: Choreographer
+    private lateinit var displayHelper : DisplayHelper
+    private val frameScheduler = FrameCallback()
+
+    private lateinit var uiHelper : UiHelper
+
+    private lateinit var assetManager : AssetManager
+
+    init {
+        MethodChannel(binaryMessenger, PolyvoxFilamentPlugin.VIEW_TYPE + '_' + viewId).also {
+            _methodChannel = it
+            it.setMethodCallHandler(this)
+        }
+        _lib = Native.loadLibrary("filament_interop", FilamentInterop::class.java, Collections.singletonMap(Library.OPTION_ALLOW_OBJECTS, true))
+        
+        
+        choreographer = Choreographer.getInstance()
+                
+        _view.setZOrderOnTop(false)
+        _view.holder.setFormat(PixelFormat.OPAQUE)
+
+        _view.holder.addCallback (object : SurfaceHolder.Callback {
+            override fun surfaceChanged(holder:SurfaceHolder, format:Int, width:Int, height:Int) {
+              _lib.update_viewport_and_camera_projection(_viewer!!, width, height, 1.0f);
+            }
+        
+            override fun surfaceCreated(holder:SurfaceHolder) {            
+              _lib.destroy_swap_chain(_viewer!!)
+              _lib.create_swap_chain(_viewer!!, _view.holder.surface, JNIEnv.CURRENT)
+            }
+            override fun surfaceDestroyed(holder:SurfaceHolder) {
+              _lib.destroy_swap_chain(_viewer!!)
+            }
+        })
+        assetManager = context.assets
+        _viewer = _lib.filament_viewer_new(
+                        _view.holder.surface as Object,
+                        "unused",
+                        "unused",
+                        JNIEnv.CURRENT,
+                        assetManager)
+
+        choreographer.postFrameCallback(frameScheduler)
+
+        val mDisplayManager = context.getSystemService(Context.DISPLAY_SERVICE) as DisplayManager
+
+        activity.window.setFormat(PixelFormat.RGBA_8888)
+
+        uiHelper = UiHelper(UiHelper.ContextErrorPolicy.DONT_CHECK)
+        uiHelper.renderCallback = SurfaceCallback()
+        uiHelper.attachTo(_view)
+    }
+    
+    override fun onFlutterViewAttached(flutterView:View) {
+
+    }
+
+    override fun dispose() {
+      _methodChannel.setMethodCallHandler(null)
+    }
+
+    override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
+        when (call.method) {
+            "loadSkybox" -> {
+                val args = call.arguments as ArrayList<Any?>
+                val loader = FlutterInjector.instance().flutterLoader()
+                _lib.load_skybox(_viewer!!, loader.getLookupKeyForAsset(args[0] as String), loader.getLookupKeyForAsset(args[1] as String))                
+                result.success("OK");
+            }
+            "loadGlb" -> {
+                if (_viewer == null)
+                    return;
+                val loader = FlutterInjector.instance().flutterLoader()
+                _lib.load_glb(
+                    _viewer!!,
+                    loader.getLookupKeyForAsset(call.arguments as String)
+                )
+                result.success("OK");
+            }
+            "loadGltf" -> {
+                if (_viewer == null)
+                    return;
+                val args = call.arguments as ArrayList<Any?>
+                val loader = FlutterInjector.instance().flutterLoader()
+                _lib.load_gltf(
+                    _viewer!!,
+                    loader.getLookupKeyForAsset(args[0] as String),
+                    loader.getLookupKeyForAsset(args[1] as String)
+                )
+                result.success("OK");
+            }
+            "setCamera" -> {
+              if (_viewer == null)
+                    return;
+                _lib.set_camera(
+                    _viewer!!,
+                    call.arguments as String
+                )
+                result.success("OK");
+            }
+            "zoom" -> {
+              if(_viewer == null)
+                return;
+              _lib.scroll(_viewer!!, 0.0f, 0.0f, (call.arguments as Double).toFloat())
+              result.success("OK");
+            }
+            "getTargetNames" -> {
+              if(_viewer == null)
+                return;
+              val arrPtr = PointerByReference();
+              val countPtr = IntByReference();
+              _lib.get_target_names(_viewer!!, call.arguments as String, arrPtr, countPtr)
+
+              val names = arrPtr.value.getStringArray(0, countPtr.value);
+
+              _lib.free_pointer(arrPtr.value, countPtr.getValue())
+                val namesAsList = names.toCollection(ArrayList())
+              result.success(namesAsList)
+            } 
+            "applyWeights" -> {
+              if(_viewer == null)
+              return;
+              val weights = call.arguments as ArrayList<Float>;
+    
+              _lib.apply_weights(_viewer!!, weights.toFloatArray(), weights.size)
+              result.success("OK");
+            }
+            "panStart" -> {
+              val args = call.arguments as ArrayList<Any?>
+              _lib.grab_begin(_viewer!!, args[0] as Int, args[1] as Int, true)
+              result.success("OK");
+            }
+            "panUpdate" -> {
+              val args = call.arguments as ArrayList<Any?>
+              _lib.grab_update(_viewer!!, args[0] as Int, args[1] as Int)
+              result.success("OK");
+            }
+            "panEnd" -> {
+              _lib.grab_end(_viewer!!)
+              result.success("OK");
+            }
+            "rotateStart" -> {
+              val args = call.arguments as ArrayList<Any?>
+              _lib.grab_begin(_viewer!!, args[0] as Int, args[1] as Int, false)
+              result.success("OK");
+            }
+            "rotateUpdate" -> {
+              val args = call.arguments as ArrayList<Any?>
+              _lib.grab_update(_viewer!!, args[0] as Int, args[1] as Int)
+              result.success("OK");
+            }
+            "rotateEnd" -> {
+              _lib.grab_end(_viewer!!)
+              result.success("OK");
+            }
+            "grabStart" -> {
+              val args = call.arguments as ArrayList<Any?>
+              _lib.grab_begin(_viewer!!, args[0] as Int, args[1] as Int, true)
+              result.success("OK");
+            }
+            "grabUpdate" -> {
+              val args = call.arguments as ArrayList<Any?>
+              _lib.grab_update(_viewer!!, args[0] as Int, args[1] as Int)
+              result.success("OK");
+            }
+            "grabEnd" -> {
+              _lib.grab_end(_viewer!!)
+              result.success("OK");
+            }
+            "releaseSourceAssets" -> {
+              _lib.release_source_assets(_viewer!!)
+              result.success("OK");
+            }
+        }
+    }
+
+    inner class SurfaceCallback : UiHelper.RendererCallback {
+        override fun onNativeWindowChanged(surface: Surface) {
+            _lib.destroy_swap_chain(_viewer!!)
+            _lib.create_swap_chain(_viewer!!, surface, JNIEnv.CURRENT)
+        }
+
+        override fun onDetachedFromSurface() {
+            _lib.destroy_swap_chain(_viewer!!)
+        }
+
+        override fun onResized(width: Int, height: Int) {
+            _lib.update_viewport_and_camera_projection(_viewer!!, width, height, 1.0f)
+        }
+    }
+
+
+    inner class FrameCallback : Choreographer.FrameCallback {
+        private val startTime = System.nanoTime()
+        override fun doFrame(frameTimeNanos: Long) {
+            choreographer.postFrameCallback(this)
+
+            // modelViewer.animator?.apply {
+            //     if (animationCount > 0) {
+            //         val elapsedTimeSeconds = (frameTimeNanos - startTime).toDouble() / 1_000_000_000
+            //         applyAnimation(0, elapsedTimeSeconds.toFloat())
+            //     }
+            //     updateBoneMatrices()
+            // }
+            _lib.render(_viewer!!)
+        }
+    }
+}

android/src/main/kotlin/app/polyvox/filament/FilamentViewFactory.kt

@@ -0,0 +1,20 @@
+package app.polyvox.filament
+
+import io.flutter.plugin.common.BinaryMessenger
+import android.app.Activity
+
+import android.content.Context
+import android.view.View
+import io.flutter.plugin.common.StandardMessageCodec
+import io.flutter.plugin.platform.PlatformView
+import io.flutter.plugin.platform.PlatformViewFactory
+
+class FilamentViewFactory(
+    private val activity: Activity,
+    private val binaryMessenger: BinaryMessenger 
+) : PlatformViewFactory(StandardMessageCodec.INSTANCE) {
+    override fun create(context: Context, viewId: Int, args: Any?): PlatformView {
+        val creationParams = args as Map<String?, Any?>?
+        return FilamentView(viewId, context, activity, binaryMessenger, creationParams)
+    }
+}

android/src/main/kotlin/app/polyvox/filament/PolyvoxFilamentPlugin.kt

@@ -2,26 +2,53 @@ package app.polyvox.filament
 
 import androidx.annotation.NonNull
 
+import androidx.lifecycle.Lifecycle
+
+import io.flutter.embedding.engine.plugins.activity.ActivityAware
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler
 import io.flutter.plugin.common.MethodChannel.Result
 
+import io.flutter.embedding.engine.plugins.lifecycle.HiddenLifecycleReference
+
+
 /** PolyvoxFilamentPlugin */
-class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler {
+class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
+
+  companion object {
+      const val VIEW_TYPE = "app.polyvox.filament/filament_view"
+  }
+
   /// The MethodChannel that will the communication between Flutter and native Android
   ///
   /// This local reference serves to register the plugin with the Flutter Engine and unregister it
   /// when the Flutter Engine is detached from the Activity
   private lateinit var channel : MethodChannel
 
+  /// Keep a referene to the plugin binding so we can defer construction of a FilamentViewFactory
+  /// until Activity is attached.
+  private lateinit var flutterPluginBinding : FlutterPlugin.FlutterPluginBinding
+
+  private var lifecycle: Lifecycle? = null
+
   override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
-    channel = MethodChannel(flutterPluginBinding.binaryMessenger, "polyvox_filament")
+    this.flutterPluginBinding = flutterPluginBinding
+    channel = MethodChannel(flutterPluginBinding.binaryMessenger, "app.polyvox.filament")
     channel.setMethodCallHandler(this)
   }
 
+  override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+    lifecycle = (binding.lifecycle as? HiddenLifecycleReference)?.lifecycle
+    flutterPluginBinding
+                .platformViewRegistry
+                .registerViewFactory(VIEW_TYPE, FilamentViewFactory(binding.activity, flutterPluginBinding.binaryMessenger))
+  }
+
   override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
+
     if (call.method == "getPlatformVersion") {
       result.success("Android ${android.os.Build.VERSION.RELEASE}")
     } else {
@@ -32,4 +59,17 @@ class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler {
   override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
     channel.setMethodCallHandler(null)
   }
+
+  
+  override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
+    onAttachedToActivity(binding)
+  }
+
+  override fun onDetachedFromActivityForConfigChanges() {
+    onDetachedFromActivity()
+  }
+
+  override fun onDetachedFromActivity() {
+  lifecycle = null
+  }
 }

android/src/main/libs/arm64-v8a/libfilament-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a8f24f2cb744814f1502a1a29164ca9d08c7f844a83e9d077f3831a1fd13c67a
+size 1723112

android/src/main/libs/arm64-v8a/libfilament-utils-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8cbdbc57e41114b428fbd6e417a4cafbffd83be8994ea0da44b2cdad6abc4e4f
+size 430944

android/src/main/libs/arm64-v8a/libfilament_interop.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1d2c3b8bf5dae7441fc7d16a345fd7a3fd170e0bcd0f0f054b16ba4e64a289d0
+size 2152000

android/src/main/libs/arm64-v8a/libgltfio-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fa2185681699dc2f72ed79bf0f3b227c8a936047e1d0f35edf2854e2dbb0319d
+size 8758184

android/src/main/libs/armeabi-v7a/libfilament-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:16fbe91a5f417dab44046090e918e3f3fb119cc7aa7ce72e68b1692687915c90
+size 1378344

android/src/main/libs/armeabi-v7a/libfilament-utils-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8cf27e32b857a98c8b8a0862ec55d8b4eb06d2f22d6d7502865f8ed5dd21db78
+size 344268

android/src/main/libs/armeabi-v7a/libfilament_interop.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:30734d9a58740c04ee282843c2a0db455d4daa239a5d15bf2f5d8c3ef04f21c8
+size 2346424

android/src/main/libs/armeabi-v7a/libgltfio-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b1498fff038d1bcdb7e52d4369b61e71ea33154ebf769934dbcadafb0bbb814b
+size 8463116

android/src/main/libs/x86/libfilament-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:134ff007e621892b60c01be75173b94fd02be5b94f6818f76c0e639d85003446
+size 1880488

android/src/main/libs/x86/libfilament-utils-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a1699bf6ab28d55e49d0a8d4d7ace8043b9477036ae8760f14c4c14deeba94d6
+size 461552

android/src/main/libs/x86/libfilament_interop.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bc2e220862a8179129fbfd5fe944e725eec57335c7014bea7ba538d62f6d93de
+size 2327272

android/src/main/libs/x86/libgltfio-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8a82bd46c8f0e3ed5970e873c92f219cdbed2d02d75855ffb889ac3821cf53c8
+size 8846488

android/src/main/libs/x86_64/libfilament-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e227eefd03b2ef8b79366fc443efe11ec87768c284f33dcfdc8906e3985fc7a6
+size 1840928

android/src/main/libs/x86_64/libfilament-utils-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:43fa88beba41cce0ffa2f25418cee021946818882b91ad6da63194e19b34fca6
+size 469208

android/src/main/libs/x86_64/libfilament_interop.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f5c0abca686c763b814af96ada136cb872b9d776ebad063b8293bb20488c4a13
+size 2141136

android/src/main/libs/x86_64/libgltfio-jni.so

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:39eaf4b8d74194db66401e754527fe3d01a457f829de559ef2503e76b8ffd9e6
+size 8859584

example/android/app/build.gradle

@@ -23,10 +23,12 @@ if (flutterVersionName == null) {
 
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -43,8 +45,8 @@ android {
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId "app.polyvox.polyvox_filament_example"
+        applicationId "app.polyvox.filament_example"
-        minSdkVersion 16
+        minSdkVersion 21
         targetSdkVersion 30
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
@@ -57,6 +59,14 @@ android {
             signingConfig signingConfigs.debug
         }
     }
+    packagingOptions {
+      merge "**/libfilament-jni.so"
+      merge "**/libgltfio-jni.so"
+      merge "**/libfilament-utils-jni.so"
+    }
+    aaptOptions {
+      noCompress "ktx"
+    }
 }
 
 flutter {
@@ -64,5 +74,13 @@ flutter {
 }
 
 dependencies {
+
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "com.google.android.filament:filament-android:1.17.0"
+    implementation "com.google.android.filament:filament-utils-android:1.17.0"
+    implementation "com.google.android.filament:gltfio-android:1.17.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.2"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.2"
+    implementation "androidx.annotation:annotation:1.3.0"
+    implementation "androidx.core:core:1.7.0"
 }

example/android/app/src/main/AndroidManifest.xml

@@ -1,8 +1,11 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="app.polyvox.polyvox_filament_example">
+    package="app.polyvox.filament_example">
    <application
+        android:name="${applicationName}"
         android:label="polyvox_filament_example"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:theme="@android:style/Theme.Translucent.NoTitleBar"
+        >
         <activity
             android:name=".MainActivity"
             android:launchMode="singleTop"

ios/Classes/FilamentMethodCallHandler.mm

@@ -8,8 +8,8 @@ static polyvox::ResourceBuffer loadResourceGlobal(const char* name) {
   return [_handler loadResource:name];
 }
 
-static void* freeResourceGlobal(void* mem, size_t size, void* misc) {
+static void* freeResourceGlobal(ResourceBuffer rb) {
-  [_handler freeResource:mem size:size misc:misc ];
+  [_handler freeResource:rb ];
   return nullptr;
 }
 
@@ -37,19 +37,16 @@ static void* freeResourceGlobal(void* mem, size_t size, void* misc) {
     [self handleMethodCall:call result:result];
   }];
   _handler = self;
+  
+  _viewer = new polyvox::FilamentViewer(_layer, nullptr, nullptr, loadResourceGlobal, freeResourceGlobal);
+  [_controller setViewer:_viewer];
+  [_controller startDisplayLink];
+
   return self;
 }
 
 - (void)handleMethodCall:(FlutterMethodCall* _Nonnull)call result:(FlutterResult _Nonnull )result {
-  if([@"initialize" isEqualToString:call.method]) {
+  if([@"loadSkybox" isEqualToString:call.method]) {
-      if(!call.arguments)
-        _viewer = new polyvox::FilamentViewer(_layer, nullptr, nullptr, loadResourceGlobal, freeResourceGlobal);
-      else
-        _viewer = new polyvox::FilamentViewer(_layer, [call.arguments[0] UTF8String], [call.arguments[1] UTF8String], loadResourceGlobal, freeResourceGlobal);
-      [_controller setViewer:_viewer];
-      [_controller startDisplayLink];
-      result(@"OK");
-  } else if([@"loadSkybox" isEqualToString:call.method]) {
     if(!_viewer)
       return;
 
@@ -65,6 +62,11 @@ static void* freeResourceGlobal(void* mem, size_t size, void* misc) {
       return; // TODO should throw exception here
     _viewer->loadGltf([call.arguments[0] UTF8String], [call.arguments[1] UTF8String]);
     result(@"OK");
+  } else if([@"setCamera" isEqualToString:call.method]) {
+    if(!_viewer)
+      return; // TODO should throw exception here
+    _viewer->setCamera([call.arguments UTF8String]);
+    result(@"OK");
   } else if([@"panStart" isEqualToString:call.method]) {
     if(!_viewer)
       return;
@@ -169,8 +171,8 @@ static void* freeResourceGlobal(void* mem, size_t size, void* misc) {
     return rbuf;
 }
 
-- (void)freeResource:(void*)mem size:(size_t)s misc:(void *)m {
+- (void)freeResource:(ResourceBuffer)rb {
-    free(mem);
+    free(rb.data);
 }
 
 - (void)ready {

ios/Classes/SwiftPolyvoxFilamentPlugin.swift

@@ -3,7 +3,7 @@ import UIKit
 
 public class SwiftPolyvoxFilamentPlugin: NSObject, FlutterPlugin {
   public static func register(with registrar: FlutterPluginRegistrar) {
-    let channel = FlutterMethodChannel(name: "polyvox_filament", binaryMessenger: registrar.messenger())
+    let channel = FlutterMethodChannel(name: "app.polyvox.filament", binaryMessenger: registrar.messenger())
     let instance = SwiftPolyvoxFilamentPlugin()
     registrar.addMethodCallDelegate(instance, channel: channel)
   }

ios/src/FilamentViewer.cpp

@@ -44,7 +44,9 @@
 #include <utils/JobSystem.h>
 
 #include "math.h"
-#include "upcast.h"
+
+#include "FFilamentInstance.h"
+#include "FFilamentAsset.h"
 
 #include <math/mat4.h>
 #include <math/quat.h>
@@ -57,13 +59,21 @@
 #include <chrono>
 #include <iostream>
 
+#include "Log.h"
+
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+#include <android/native_window_jni.h>
+#include <android/log.h>
+#include <android/native_activity.h>
+
 using namespace filament;
 using namespace filament::math;
 using namespace gltfio;
 using namespace utils;
 using namespace std::chrono;
 
-namespace foo {
+namespace gltfio {
   MaterialProvider* createUbershaderLoader(filament::Engine* engine);
 }
 
@@ -127,11 +137,16 @@ FilamentViewer::FilamentViewer(
         FreeResource freeResource) : _layer(layer), 
                                     _loadResource(loadResource),
                                     _freeResource(freeResource),
-                                    opaqueShaderResources(nullptr, 0),
+                                    opaqueShaderResources(nullptr, 0, 0),
-                                    fadeShaderResources(nullptr, 0) {
+                                    fadeShaderResources(nullptr, 0, 0),
+                                    _assetBuffer(nullptr, 0, 0) {
     _engine = Engine::create(Engine::Backend::OPENGL);
 
     _renderer = _engine->createRenderer();
+
+    _renderer->setDisplayInfo({ .refreshRate = 60.0f,
+                               .presentationDeadlineNanos = (uint64_t)0,
+                               .vsyncOffsetNanos = (uint64_t)0 });
     _scene = _engine->createScene();
     Entity camera = EntityManager::get().create();
     _mainCamera = _engine->createCamera(camera);
@@ -144,18 +159,22 @@ FilamentViewer::FilamentViewer(
 
     _swapChain = _engine->createSwapChain(_layer);
 
-  //  if(shaderPath) {
+    View::DynamicResolutionOptions options;
-       opaqueShaderResources = _loadResource(opaqueShaderPath);
+    options.enabled = true;
-       fadeShaderResources = _loadResource(fadeShaderPath);
+    // options.homogeneousScaling = homogeneousScaling;
-       _materialProvider = createGPUMorphShaderLoader(
+    // options.minScale = filament::math::float2{ minScale };
-         opaqueShaderResources.data,
+    // options.maxScale = filament::math::float2{ maxScale };
-         opaqueShaderResources.size,
+    //options.sharpness = sharpness;
-         fadeShaderResources.data,
+    options.quality = View::QualityLevel::MEDIUM;;
-         fadeShaderResources.size,
+    _view->setDynamicResolutionOptions(options);
-         _engine);
+
-  //  } else {
+    View::MultiSampleAntiAliasingOptions multiSampleAntiAliasingOptions;
-        //  _materialProvider = foo::createUbershaderLoader(_engine);
+    multiSampleAntiAliasingOptions.enabled = true;
-  //   }
+
+    _view->setMultiSampleAntiAliasingOptions(multiSampleAntiAliasingOptions);
+
+    _materialProvider = gltfio::createUbershaderLoader(_engine);
+
     EntityManager& em = EntityManager::get();
     _ncm = new NameComponentManager(em);
     _assetLoader = AssetLoader::create({_engine, _materialProvider, _ncm, &em});
@@ -163,7 +182,7 @@ FilamentViewer::FilamentViewer(
             {.engine = _engine, .normalizeSkinningWeights = true, .recomputeBoundingBoxes = false});
         
     manipulator =
-            Manipulator<float>::Builder().orbitHomePosition(0.0f, -1.4f, 1.0f).targetPosition(0.0f, -0.5f, 0.75f).build(Mode::ORBIT);
+            Manipulator<float>::Builder().orbitHomePosition(0.0f, 0.0f, 0.0f).targetPosition(0.0f, 0.0f, -4.0f).build(Mode::ORBIT);
     _asset = nullptr;
                                       
 }
@@ -172,21 +191,54 @@ FilamentViewer::~FilamentViewer() {
 
 }
 
-void printWeights(float* weights, int numWeights) {
+Renderer* FilamentViewer::getRenderer() {
-  for(int i =0; i < numWeights; i++) {
+  return _renderer;
-//    std::cout << weights[i];
+}
+
+void FilamentViewer::createSwapChain(void* surface) {
+  _swapChain = _engine->createSwapChain(surface);
+  // Log("swapchain created.");
+}
+
+void FilamentViewer::destroySwapChain() {
+  if(_swapChain) {
+    _engine->destroy(_swapChain);
+    _swapChain = nullptr;
+  }
+  // Log("swapchain destroyed.");
+}
+
+void FilamentViewer::applyWeights(float* weights, int count) {
+
+  for (size_t i = 0, c = _asset->getEntityCount(); i != c; ++i) {
+    _asset->setMorphWeights(
+      _asset->getEntities()[i],
+      weights, 
+      count
+    );
   }
 }
 
 void FilamentViewer::loadResources(string relativeResourcePath) {
     const char* const* const resourceUris = _asset->getResourceUris();
     const size_t resourceUriCount = _asset->getResourceUriCount();
+
+    Log("Loading %d resources for asset", resourceUriCount);
+
     for (size_t i = 0; i < resourceUriCount; i++) {
         string uri = relativeResourcePath + string(resourceUris[i]);
         ResourceBuffer buf = _loadResource(uri.c_str());
+             
+        // using FunctionCallback = std::function<void(void*, unsigned int, void *)>;
+
+        // auto cb = [&] (void * ptr, unsigned int len, void * misc)  {
+          
+        // };
+        // FunctionCallback fcb = cb;
         ResourceLoader::BufferDescriptor b(
-                buf.data, buf.size, (ResourceLoader::BufferDescriptor::Callback)&_freeResource, nullptr);
+                buf.data, buf.size);
         _resourceLoader->addResourceData(resourceUris[i], std::move(b));
+        _freeResource(buf);
     }
 
     _resourceLoader->loadResources(_asset);
@@ -204,26 +256,22 @@ void FilamentViewer::loadResources(string relativeResourcePath) {
 };
 
 void FilamentViewer::releaseSourceAssets() {
-  std::cout << "Releasing source data" << std::endl;
+  Log("Releasing source data");
   _asset->releaseSourceData();
-  _freeResource((void*)opaqueShaderResources.data, opaqueShaderResources.size, nullptr);
+  // _freeResource(opaqueShaderResources);
-  _freeResource((void*)fadeShaderResources.data, fadeShaderResources.size, nullptr);
+  // _freeResource(fadeShaderResources);
 }
 
 
-void FilamentViewer::animateWeights(float* data, int numWeights, int length, float frameRate) {
-//  transformToUnitCube();
-  morphAnimationBuffer = std::make_unique<MorphAnimationBuffer>(data, numWeights, length / numWeights, 1000 / frameRate );
-}
-
 void FilamentViewer::loadGlb(const char* const uri) {
   
-  std::cerr << "Loading GLB at URI " << uri << std::endl;
+  Log("Loading GLB at URI %s", uri);
 
   if(_asset) {
         _resourceLoader->evictResourceData();
         _scene->removeEntities(_asset->getEntities(), _asset->getEntityCount());
         _assetLoader->destroyAsset(_asset);
+        _freeResource(_assetBuffer);
    }
    _asset = nullptr;
    _animator = nullptr;
@@ -234,7 +282,7 @@ void FilamentViewer::loadGlb(const char* const uri) {
             (const uint8_t*)rbuf.data, rbuf.size);
 
    if (!_asset) {
-      std::cerr << "Unknown error loading GLB asset." << std::endl;
+      Log("Unknown error loading GLB asset.");
       exit(1);
    }
    
@@ -242,7 +290,7 @@ void FilamentViewer::loadGlb(const char* const uri) {
   
    _scene->addEntities(_asset->getEntities(), entityCount);
 
-   std::cerr << "Added " << entityCount << " entities to scene" << std::endl;
+   Log("Added %d entities to scene",  entityCount);
    _resourceLoader->loadResources(_asset);
    _animator = _asset->getAnimator();
 
@@ -254,56 +302,58 @@ void FilamentViewer::loadGlb(const char* const uri) {
         rm.setCulling(inst, false);
     }
 
-    _freeResource((void*)rbuf.data, rbuf.size, nullptr);
+    _freeResource(rbuf);
-  
+    
-//    transformToUnitCube();
+    Log("Successfully loaded GLB.");
-  
-    setCamera("Camera.001"); // TODO - expose this for external invocation
-
-  
-    std::cerr << "Successfully loaded GLB." << std::endl;
 }
 
 void FilamentViewer::loadGltf(const char* const uri, const char* const relativeResourcePath) {
+
+    Log("Loading GLTF at URI %s", uri);
+
     if(_asset) {
+        Log("Asset already exists");
         _resourceLoader->evictResourceData();
         _scene->removeEntities(_asset->getEntities(), _asset->getEntityCount());
         _assetLoader->destroyAsset(_asset);
+        _freeResource(_assetBuffer);
     }
     _asset = nullptr;
     _animator = nullptr;
 
-    ResourceBuffer rbuf = _loadResource(uri);
+    _assetBuffer = _loadResource(uri);
     
     // Parse the glTF file and create Filament entities.
-    _asset = _assetLoader->createAssetFromJson((uint8_t*)rbuf.data, rbuf.size);
+    Log("Creating asset from JSON");
+    _asset = _assetLoader->createAssetFromJson((uint8_t*)_assetBuffer.data, _assetBuffer.size);
+    Log("Created asset from JSON");
   
     if (!_asset) {
-        std::cerr << "Unable to parse asset" << std::endl;
+        Log("Unable to parse asset");
         exit(1);
     }
-
+    Log("Loading relative resources");
     loadResources(string(relativeResourcePath) + string("/"));
+    Log("Loaded relative resources");
+//    _asset->releaseSourceData();
 
-    _freeResource((void*)rbuf.data, rbuf.size, nullptr);
+    Log("Load complete for GLTF at URI %s", uri);
+
+    transformToUnitCube();
   
-//    transformToUnitCube();
-
-    setCamera("Camera.001"); // TODO - expose this for external invocation
-
 }
 
 void FilamentViewer::setCamera(const char* cameraName) {
   FFilamentAsset* asset = (FFilamentAsset*)_asset;
 
-  NodeMap &sourceNodes = asset->isInstanced() ? asset->mInstances[0]->nodeMap
+  gltfio::NodeMap &sourceNodes = asset->isInstanced() ? asset->mInstances[0]->nodeMap
                                             : asset->mNodeMap;
 
   for (auto pair : sourceNodes) {
       cgltf_node const *node = pair.first;
 
       if(node->camera) {
-        std::cout << "Got camera " << node->camera->name << " of type " << node->camera->type << std::endl;
+        Log("Got camera %s of type %s ", node->camera->name, node->camera->type);
 
         if(strcmp(cameraName, node->camera->name) == 0) {
          filament::math::mat4 mat(
@@ -342,84 +392,48 @@ void FilamentViewer::setCamera(const char* cameraName) {
 
 StringList FilamentViewer::getTargetNames(const char* meshName) {
   FFilamentAsset* asset = (FFilamentAsset*)_asset;
+  NodeMap &sourceNodes = asset->isInstanced() ? asset->mInstances[0]->nodeMap : asset->mNodeMap;
+
+  if(sourceNodes.empty()) {
+      Log("Asset source nodes empty?");
+      return StringList(nullptr, 0);
+  }
+  Log("Fetching morph target names for mesh %s", meshName);
 
-  NodeMap &sourceNodes = asset->isInstanced() ? asset->mInstances[0]->nodeMap
-                                            : asset->mNodeMap;
-  FilamentInstance** instances = asset->getAssetInstances();
-  std::cout << "Fetching morph target names for mesh " << meshName;
   for (auto pair : sourceNodes) {
       cgltf_node const *node = pair.first;
       cgltf_mesh const *mesh = node->mesh;
 
       if(node->camera) {
-        std::cout << "Got camera " << node->camera->name << " of type " << node->camera->type << std::endl;
+        Log("Got camera %s of type %s", node->camera->name, node->camera->type);
       } 
       
       if (mesh) {
-        std::cout << "Mesh : " << mesh->name;
+        Log("Mesh : %s ",mesh->name);
         if(strcmp(meshName, mesh->name) == 0) {
           return StringList((const char**)mesh->target_names, (int) mesh->target_names_count);
         } 
       } else {
-        std::cout << "No mesh attached to node";
+        Log("No mesh attached to node");
       }
   }
   return StringList(nullptr, 0);
 }
 
-void FilamentViewer::createMorpher(const char* meshName, int* primitives, int numPrimitives) {
-  morphHelper = new gltfio::GPUMorphHelper((FFilamentAsset*)_asset, meshName, primitives, numPrimitives);
-//  morphHelper = new gltfio::CPUMorpher(((FFilamentAsset)*_asset, (FFilamentInstance*)_asset));
-}
 
-void FilamentViewer::applyWeights(float* weights, int count) {
+void FilamentViewer::loadSkybox(const char* const skyboxPath, const char* const iblPath, AAssetManager* am) {
-  morphHelper->applyWeights(weights, count);
-}
-
-void FilamentViewer::animateBones() {
-  Entity entity = _asset->getFirstEntityByName("CC_Base_JawRoot");
-  if(!entity) {
-    return;
-  }
-
-  TransformManager& transformManager = _engine->getTransformManager();
-
-  TransformManager::Instance node = transformManager.getInstance(  entity);
-
-  mat4f xform = transformManager.getTransform(node);
-  float3 scale;
-  quatf rotation;
-  float3 translation;
-  decomposeMatrix(xform, &translation, &rotation, &scale);
-
-//  const quatf srcQuat { weights[0] * 0.9238,0,weights[0] *  0.3826, 0 };
-//  float3 { scale[0] * (1.0f - weights[0]), scale[1] * (1.0f - weights[1]), scale[2] * (1.0f - weights[2]) }
-//  xform = composeMatrix(translation + float3 { weights[0], weights[1], weights[2] }, rotation, scale );
-  transformManager.setTransform(node, xform);
-
-}
-
-void FilamentViewer::playAnimation(int index) {
-  embeddedAnimationBuffer = make_unique<EmbeddedAnimationBuffer>(index, _animator->getAnimationDuration(index));
-}
-    
-void FilamentViewer::loadSkybox(const char* const skyboxPath, const char* const iblPath) {
      
-    std::cout << "Loading skybox from " << skyboxPath << std::endl;
-
     ResourceBuffer skyboxBuffer = _loadResource(skyboxPath);
 
-    std::cout << "Loaded skybox resource buffer of size  " << skyboxBuffer.size << std::endl;
-    
     image::KtxBundle* skyboxBundle =
-            new image::KtxBundle(static_cast<const uint8_t*>(skyboxBuffer.data),
+            new image::KtxBundle(static_cast<const uint8_t*>(skyboxBuffer.data), static_cast<uint32_t>(skyboxBuffer.size));    
-                    static_cast<uint32_t>(skyboxBuffer.size));
+    _skyboxTexture = image::ktx::createTexture(_engine, skyboxBundle, false);
-    _skyboxTexture = image::ktx::createTexture(_engine, skyboxBundle, true);
     _skybox = filament::Skybox::Builder().environment(_skyboxTexture).build(*_engine);
+    // _skybox = Skybox::Builder().color({0.1, 0.125, 0.25, 1.0}).build(*_engine);
     _scene->setSkybox(_skybox);
-    _freeResource((void*)skyboxBuffer.data, skyboxBuffer.size, nullptr);
+    _freeResource(skyboxBuffer);
-
+    
-    std::cout << "Loading IBL from " << iblPath << std::endl;
+    Log("Loading IBL from %s",  iblPath);
 
     // Load IBL.
     ResourceBuffer iblBuffer = _loadResource(iblPath);
@@ -436,7 +450,7 @@ void FilamentViewer::loadSkybox(const char* const skyboxPath, const char* const
                              .build(*_engine);
     _scene->setIndirectLight(_indirectLight);
   
-    _freeResource((void*)iblBuffer.data, iblBuffer.size, nullptr);
+    _freeResource(iblBuffer);
 
     // Always add a direct light source since it is required for shadowing.
     _sun = EntityManager::get().create();
@@ -447,10 +461,14 @@ void FilamentViewer::loadSkybox(const char* const skyboxPath, const char* const
             .castShadows(true)
             .build(*_engine, _sun);
     _scene->addEntity(_sun);
+    
+    Log("Skybox/IBL load complete.");
+
 }
 
 void FilamentViewer::transformToUnitCube() {
       if (!_asset) {
+          Log("No asset, cannot transform.");
           return;
       }
       auto& tm = _engine->getTransformManager();
@@ -468,36 +486,47 @@ void FilamentViewer::cleanup() {
     _assetLoader->destroyAsset(_asset);
     _materialProvider->destroyMaterials();
     AssetLoader::destroy(&_assetLoader);
+    _freeResource(_assetBuffer);
 };
 
 void FilamentViewer::render() {
-    if (!_view || !_mainCamera || !manipulator || !_animator) {
+    if (!_view || !_mainCamera || !_swapChain) {
+        Log("Not ready for rendering");
         return;
     }
-  // Extract the camera basis from the helper and push it to the Filament camera.
-    //math::float3 eye, target, upward;
-    //manipulator->getLookAt(&eye, &target, &upward);
 
-    //_mainCamera->lookAt(eye, target, upward);
+    math::float3 eye, target, upward;
-  
+    manipulator->getLookAt(&eye, &target, &upward);
-    if(morphAnimationBuffer) {
+    _mainCamera->lookAt(eye, target, upward);
-      updateMorphAnimation();
-    }
-    
-    if(embeddedAnimationBuffer) {
-      updateEmbeddedAnimation();
-    }
 
     // Render the scene, unless the renderer wants to skip the frame.
     if (_renderer->beginFrame(_swapChain)) {
         _renderer->render(_view);
         _renderer->endFrame();
-    } else {
+    } 
-     // std::cout << "Skipping frame" << std::endl;
-    }
 }
 
-//void FilamentViewer::updateAnimation(AnimationBuffer animation, std::function<void(int)> moo) {
+
+void FilamentViewer::updateViewportAndCameraProjection(int width, int height, float contentScaleFactor) {
+    if (!_view || !_mainCamera) {
+        Log("Skipping camera update, no view or camrea");
+        return;
+    }
+
+    const uint32_t _width = width * contentScaleFactor;
+    const uint32_t _height = height * contentScaleFactor;
+    _view->setViewport({0, 0, _width, _height});
+
+    const double aspect = (double)width / height;
+    _mainCamera->setLensProjection(_cameraFocalLength, aspect, kNearPlane, kFarPlane);
+    Log("Set viewport to %d %d", _width, _height);
+}
+
+
+}
+
+
+    //void FilamentViewer::updateAnimation(AnimationBuffer animation, std::function<void(int)> moo) {
 //  if(morphAnimationBuffer.frameIndex >= animation.numFrames) {
 //    this.animation = null;
 //    return;
@@ -518,80 +547,115 @@ void FilamentViewer::render() {
 //  }
 //}
 
-void FilamentViewer::updateMorphAnimation() {
+// void FilamentViewer::updateMorphAnimation() {
   
-  if(morphAnimationBuffer->frameIndex >= morphAnimationBuffer->numFrames) {
+//   if(morphAnimationBuffer->frameIndex >= morphAnimationBuffer->numFrames) {
-    morphAnimationBuffer = nullptr;
+//     morphAnimationBuffer = nullptr;
-    return;
+//     return;
-  }
+//   }
   
-  if(morphAnimationBuffer->frameIndex == -1) {
+//   if(morphAnimationBuffer->frameIndex == -1) {
-    morphAnimationBuffer->frameIndex++;
+//     morphAnimationBuffer->frameIndex++;
-    morphAnimationBuffer->startTime = std::chrono::high_resolution_clock::now();
+//     morphAnimationBuffer->startTime = std::chrono::high_resolution_clock::now();
-    applyWeights(morphAnimationBuffer->frameData, morphAnimationBuffer->numWeights);
+//     applyWeights(morphAnimationBuffer->frameData, morphAnimationBuffer->numWeights);
-  } else {
+//   } else {
-    std::chrono::duration<double, std::milli> dur = std::chrono::high_resolution_clock::now() - morphAnimationBuffer->startTime;
+//     std::chrono::duration<double, std::milli> dur = std::chrono::high_resolution_clock::now() - morphAnimationBuffer->startTime;
-    int frameIndex = dur.count() / morphAnimationBuffer->frameLength;
+//     int frameIndex = dur.count() / morphAnimationBuffer->frameLength;
-    if(frameIndex != morphAnimationBuffer->frameIndex) {
+//     if(frameIndex != morphAnimationBuffer->frameIndex) {
-        morphAnimationBuffer->frameIndex = frameIndex;
+//         morphAnimationBuffer->frameIndex = frameIndex;
-        applyWeights(morphAnimationBuffer->frameData + (morphAnimationBuffer->frameIndex * morphAnimationBuffer->numWeights), morphAnimationBuffer->numWeights);
+//         applyWeights(morphAnimationBuffer->frameData + (morphAnimationBuffer->frameIndex * morphAnimationBuffer->numWeights), morphAnimationBuffer->numWeights);
-    }
+//     }
-  }
+//   }
   
-}
+// }
 
-void FilamentViewer::updateEmbeddedAnimation() {
+// void FilamentViewer::updateEmbeddedAnimation() {
-  duration<double> dur = duration_cast<duration<double>>(std::chrono::high_resolution_clock::now() - embeddedAnimationBuffer->lastTime);
+//   duration<double> dur = duration_cast<duration<double>>(std::chrono::high_resolution_clock::now() - embeddedAnimationBuffer->lastTime);
-  float startTime = 0;
+//   float startTime = 0;
-  if(!embeddedAnimationBuffer->hasStarted) {
+//   if(!embeddedAnimationBuffer->hasStarted) {
-    embeddedAnimationBuffer->hasStarted = true;
+//     embeddedAnimationBuffer->hasStarted = true;
-    embeddedAnimationBuffer->lastTime = std::chrono::high_resolution_clock::now();
+//     embeddedAnimationBuffer->lastTime = std::chrono::high_resolution_clock::now();
-  } else if(dur.count() >= embeddedAnimationBuffer->duration) {
+//   } else if(dur.count() >= embeddedAnimationBuffer->duration) {
-    embeddedAnimationBuffer = nullptr;
+//     embeddedAnimationBuffer = nullptr;
-    return;
+//     return;
-  } else {
+//   } else {
-    startTime = dur.count();
+//     startTime = dur.count();
-  }
+//   }
   
 
-  _animator->applyAnimation(embeddedAnimationBuffer->animationIndex, startTime);
+//   _animator->applyAnimation(embeddedAnimationBuffer->animationIndex, startTime);
-  _animator->updateBoneMatrices();
+//   _animator->updateBoneMatrices();
   
-}
+// }
-//
+// //
-//if(morphAnimationBuffer.frameIndex >= morphAnimationBuffer.numFrames) {
+// //if(morphAnimationBuffer.frameIndex >= morphAnimationBuffer.numFrames) {
-//  this.morphAnimationBuffer = null;
+// //  this.morphAnimationBuffer = null;
-//  return;
+// //  return;
-//}
+// //}
-//
+// //
-//if(morphAnimationBuffer.frameIndex == -1) {
+// //if(morphAnimationBuffer.frameIndex == -1) {
-//  applyWeights(morphAnimationBuffer->frameData, morphAnimationBuffer->numWeights);
+// //  applyWeights(morphAnimationBuffer->frameData, morphAnimationBuffer->numWeights);
-//  morphAnimationBuffer->frameIndex++;
+// //  morphAnimationBuffer->frameIndex++;
-//  morphAnimationBuffer->lastTime = std::chrono::high_resolution_clock::now();
+// //  morphAnimationBuffer->lastTime = std::chrono::high_resolution_clock::now();
-//} else {
+// //} else {
-//  duration dur = std::chrono::high_resolution_clock::now() - morphAnimationBuffer->lastTime;
+// //  duration dur = std::chrono::high_resolution_clock::now() - morphAnimationBuffer->lastTime;
-//  float msElapsed = dur.count();
+// //  float msElapsed = dur.count();
-//  if(msElapsed > morphAnimationBuffer->frameLength) {
+// //  if(msElapsed > morphAnimationBuffer->frameLength) {
-//      frameIndex++;
+// //      frameIndex++;
-//      applyWeights(frameData + (frameIndex * numWeights), numWeights);
+// //      applyWeights(frameData + (frameIndex * numWeights), numWeights);
-//      morphAnimationBuffer->lastTime = std::chrono::high_resolution_clock::now();
+// //      morphAnimationBuffer->lastTime = std::chrono::high_resolution_clock::now();
-//  }
+// //  }
-//}
+// //}
+// void FilamentViewer::playAnimation(int index) {
+//   embeddedAnimationBuffer = make_unique<EmbeddedAnimationBuffer>(index, _animator->getAnimationDuration(index));
+// }
 
-void FilamentViewer::updateViewportAndCameraProjection(int width, int height, float contentScaleFactor) {
+// void FilamentViewer::animateWeights(float* data, int numWeights, int length, float frameRate) {
-    if (!_view || !_mainCamera || !manipulator) {
+//   morphAnimationBuffer = std::make_unique<MorphAnimationBuffer>(data, numWeights, length / numWeights, 1000 / frameRate );
-        return;
+// }
-    }
 
-    manipulator->setViewport(width, height);
+           //  if(shaderPath) {
+      //  opaqueShaderResources = _loadResource(opaqueShaderPath);
+      //  fadeShaderResources = _loadResource(fadeShaderPath);
+      //  _materialProvider = createGPUMorphShaderLoader(
+      //    opaqueShaderResources.data,
+      //    opaqueShaderResources.size,
+      //    fadeShaderResources.data,
+      //    fadeShaderResources.size,
+      //    _engine);
+  //  } else {
+  //   }
+//   void printWeights(float* weights, int numWeights) {
+//   for(int i =0; i < numWeights; i++) {
+// //    std::cout << weights[i];
+//   }
+// }
 
-    const uint32_t _width = width * contentScaleFactor;
+// void FilamentViewer::createMorpher(const char* meshName, int* primitives, int numPrimitives) {
-    const uint32_t _height = height * contentScaleFactor;
+//   // morphHelper = new gltfio::GPUMorphHelper((FFilamentAsset*)_asset, meshName, primitives, numPrimitives);
-    _view->setViewport({0, 0, _width, _height});
+// //  morphHelper = new gltfio::CPUMorpher(((FFilamentAsset)*_asset, (FFilamentInstance*)_asset));
+// }
 
-    const double aspect = (double)width / height;
+// void FilamentViewer::animateBones() {
-    _mainCamera->setLensProjection(_cameraFocalLength, aspect, kNearPlane, kFarPlane);
+// }
-}
+//   Entity entity = _asset->getFirstEntityByName("CC_Base_JawRoot");
+//   if(!entity) {
+//     return;
+//   }
 
+//   TransformManager& transformManager = _engine->getTransformManager();
 
-}
+//   TransformManager::Instance node = transformManager.getInstance(  entity);
+
+//   mat4f xform = transformManager.getTransform(node);
+//   float3 scale;
+//   quatf rotation;
+//   float3 translation;
+//   decomposeMatrix(xform, &translation, &rotation, &scale);
+
+// //  const quatf srcQuat { weights[0] * 0.9238,0,weights[0] *  0.3826, 0 };
+// //  float3 { scale[0] * (1.0f - weights[0]), scale[1] * (1.0f - weights[1]), scale[2] * (1.0f - weights[2]) }
+// //  xform = composeMatrix(translation + float3 { weights[0], weights[1], weights[2] }, rotation, scale );
+//   transformManager.setTransform(node, xform);
+
+// }

ios/src/FilamentViewer.hpp

@@ -30,7 +30,11 @@
 #include <string>
 #include <chrono>
 
-#include "GPUMorphHelper.h"
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+#include <android/native_window_jni.h>
+#include <android/log.h>
+#include <android/native_activity.h>
 
 using namespace std;
 using namespace filament;
@@ -51,46 +55,22 @@ namespace polyvox {
     };
 
     struct ResourceBuffer {
-        ResourceBuffer(const void* data, const uint32_t size) : data(data), size(size) {};
+        ResourceBuffer(const void* data, const uint32_t size, const uint32_t id) : data(data), size(size), id(id) {};
 
         ResourceBuffer& operator=(ResourceBuffer other)
         {
           data = other.data;
           size = other.size;
+          id = other.id;
           return *this;
         }
         const void* data;
-        uint64_t size;
+        uint32_t size;
-    };
+        uint32_t id;
-
-    struct MorphAnimationBuffer {
-      
-      MorphAnimationBuffer(float* frameData,
-                           int numWeights,
-                           int numFrames,
-                           float frameLength) : frameData(frameData), numWeights(numWeights), numFrames(numFrames), frameLength(frameLength) {
-      }
-      
-      int frameIndex = -1;
-      int numFrames;
-      float frameLength;
-      time_point_t startTime;
-      
-      float* frameData;
-      int numWeights;
-    };
-
-    struct EmbeddedAnimationBuffer  {
-        
-      EmbeddedAnimationBuffer(int animationIndex, float duration) : animationIndex(animationIndex), duration(duration) {}
-      bool hasStarted = false;
-      int animationIndex;
-      float duration = 0;
-      time_point_t lastTime;
     };
 
     using LoadResource = std::function<ResourceBuffer(const char* uri)>;
-    using FreeResource = std::function<void * (void *mem, size_t s, void *)>;
+    using FreeResource = std::function<void (ResourceBuffer)>;
 
     class FilamentViewer {
         public:
@@ -98,31 +78,29 @@ namespace polyvox {
             ~FilamentViewer();
             void loadGlb(const char* const uri);
             void loadGltf(const char* const uri, const char* relativeResourcePath);
-            void loadSkybox(const char* const skyboxUri, const char* const iblUri);
+            void loadSkybox(const char* const skyboxUri, const char* const iblUri, AAssetManager* am);
+
             void updateViewportAndCameraProjection(int height, int width, float scaleFactor);
             void render();
-            void createMorpher(const char* meshName, int* primitives, int numPrimitives);
+            // void createMorpher(const char* meshName, int* primitives, int numPrimitives);
             void releaseSourceAssets();
             StringList getTargetNames(const char* meshName);
             Manipulator<float>* manipulator;
             void applyWeights(float* weights, int count);
-            void animateWeights(float* data, int numWeights, int length, float frameRate);
+            // void animateWeights(float* data, int numWeights, int length, float frameRate);
-            void animateBones();
+            // void animateBones();
             void playAnimation(int index);
+            void setCamera(const char* nodeName);
+            void destroySwapChain();
+            void createSwapChain(void* surface);
+
+            Renderer* getRenderer();
 
         private:
       
             void loadResources(std::string relativeResourcePath);
             void transformToUnitCube();
             void cleanup();
-            void updateMorphAnimation();
-            void updateEmbeddedAnimation();
-            void setCamera(const char* cameraName);
-            
-            // animation flags;
-            bool isAnimating;
-            unique_ptr<MorphAnimationBuffer> morphAnimationBuffer;
-            unique_ptr<EmbeddedAnimationBuffer> embeddedAnimationBuffer;
             
             void* _layer;
 
@@ -138,12 +116,13 @@ namespace polyvox {
             Camera* _mainCamera;
             Renderer* _renderer;
     
-            SwapChain* _swapChain;
+            SwapChain* _swapChain = nullptr;
 
             Animator* _animator;
 
             AssetLoader* _assetLoader;
             FilamentAsset* _asset = nullptr;
+            ResourceBuffer _assetBuffer;
             NameComponentManager* _ncm;
 
             Entity _sun;
@@ -161,9 +140,41 @@ namespace polyvox {
             
             float _cameraFocalLength = 0.0f;
 
-            GPUMorphHelper* morphHelper;
-    
 
 
     };
 }
+
+            // void updateMorphAnimation();
+            // void updateEmbeddedAnimation();
+            
+            // animation flags;
+            // bool isAnimating;
+            // unique_ptr<MorphAnimationBuffer> morphAnimationBuffer;
+            // unique_ptr<EmbeddedAnimationBuffer> embeddedAnimationBuffer;
+
+                // struct EmbeddedAnimationBuffer  {
+        
+    //   EmbeddedAnimationBuffer(int animationIndex, float duration) : animationIndex(animationIndex), duration(duration) {}
+    //   bool hasStarted = false;
+    //   int animationIndex;
+    //   float duration = 0;
+    //   time_point_t lastTime;
+    // };
+
+    //     struct MorphAnimationBuffer {
+      
+    //   MorphAnimationBuffer(float* frameData,
+    //                        int numWeights,
+    //                        int numFrames,
+    //                        float frameLength) : frameData(frameData), numWeights(numWeights), numFrames(numFrames), frameLength(frameLength) {
+    //   }
+      
+    //   int frameIndex = -1;
+    //   int numFrames;
+    //   float frameLength;
+    //   time_point_t startTime;
+      
+    //   float* frameData;
+    //   int numWeights;
+    // };

lib/filament_controller.dart

@@ -4,7 +4,6 @@ import 'package:flutter/services.dart';
 
 abstract class FilamentController {
   void onFilamentViewCreated(int id);
-
   Future loadSkybox(String skyboxPath, String lightingPath);
   Future loadGlb(String path);
   Future loadGltf(String path, String relativeResourcePath);
@@ -43,23 +42,15 @@ class PolyvoxFilamentController extends FilamentController {
     _id = id;
     _channel = MethodChannel("app.polyvox.filament/filament_view_$id");
     _channel.setMethodCallHandler((call) async {
-      await Future.delayed(const Duration(
+      if(call.method == "ready") {
-          seconds:
+        onFilamentViewCreatedHandler?.call(_id);
-              1)); // todo - need a better way to know when the GL context is actually ready
+        return Future.value(true);
-      await _initialize();
+      } else {
-      onFilamentViewCreatedHandler?.call(_id);
+        throw Exception("Unknown method channel invocation ${call.method}");
-      return Future.value(true);
+      }
     });
   }
 
-
-  Future _initialize() async {
-    await _channel.invokeMethod("initialize", [
-      "packages/polyvox_filament/assets/lit_opaque.filamat",
-      "packages/polyvox_filament/assets/lit_fade.filamat"
-    ]);
-  }
-
   @override
   Future loadSkybox(String skyboxPath, String lightingPath) async {
     await _channel.invokeMethod("loadSkybox", [skyboxPath, lightingPath]);

lib/polyvox_filament.dart

@@ -1,17 +0,0 @@
-// You have generated a new plugin project without
-// specifying the `--platforms` flag. A plugin project supports no platforms is generated.
-// To add platforms, run `flutter create -t plugin --platforms <platforms> .` under the same
-// directory. You can also find a detailed instruction on how to add platforms in the `pubspec.yaml` at https://flutter.dev/docs/development/packages-and-plugins/developing-packages#plugin-platforms.
-
-import 'dart:async';
-
-import 'package:flutter/services.dart';
-
-class PolyvoxFilament {
-  static const MethodChannel _channel = MethodChannel('polyvox_filament');
-
-  static Future<String?> get platformVersion async {
-    final String? version = await _channel.invokeMethod('getPlatformVersion');
-    return version;
-  }
-}

lib/view/filament_view.dart

@@ -17,32 +17,14 @@ class FilamentView extends FilamentViewPlatform {
   ) {
     switch (defaultTargetPlatform) {
       case TargetPlatform.android:
-        return PlatformViewLink(
+        return AndroidView(
-          viewType: FILAMENT_VIEW_ID,
+            viewType: FILAMENT_VIEW_ID,
-          surfaceFactory:
+            gestureRecognizers: <Factory<OneSequenceGestureRecognizer>>{},
-              (BuildContext context, PlatformViewController controller) {
+            hitTestBehavior: PlatformViewHitTestBehavior.opaque,
-            return AndroidViewSurface(
+            onPlatformViewCreated: (id) {
-              controller: controller as AndroidViewController,
+              print("onplatformview created $id");
-              gestureRecognizers: const <
+              onFilamentViewCreated(id);
-                  Factory<OneSequenceGestureRecognizer>>{},
+            });
-              hitTestBehavior: PlatformViewHitTestBehavior.opaque,
-            );
-          },
-          onCreatePlatformView: (PlatformViewCreationParams params) {
-            return PlatformViewsService.initSurfaceAndroidView(
-              id: params.id,
-              viewType: FILAMENT_VIEW_ID,
-              layoutDirection: TextDirection.ltr,
-              creationParams: {},
-              creationParamsCodec: StandardMessageCodec(),
-            )
-              ..addOnPlatformViewCreatedListener((int id) {
-                onFilamentViewCreated(id);
-                params.onPlatformViewCreated(id);
-              })
-              ..create();
-          },
-        );
       case TargetPlatform.iOS:
         return UiKitView(
           viewType: FILAMENT_VIEW_ID,
@@ -51,8 +33,7 @@ class FilamentView extends FilamentViewPlatform {
           },
         );
       case TargetPlatform.windows:
-        return Text(
+        return Text("Flutter doesn't support platform view on Windows yet.");
-            "Flutter doesn't support platform view on Windows yet.");
       default:
         return Text(
             '$defaultTargetPlatform is not yet implemented by Filament plugin.');

lib/view/filament_view_platform.dart

@@ -2,13 +2,13 @@ import 'package:flutter/widgets.dart';
 import 'package:polyvox_filament/view/filament_view.dart';
 import 'package:plugin_platform_interface/plugin_platform_interface.dart';
 
-typedef void FilamentViewCreatedCallback(int id);
+typedef FilamentViewCreatedCallback = void Function(int id);
 
 abstract class FilamentViewPlatform extends PlatformInterface {
   FilamentViewPlatform() : super(token: _token);
 
   static final Object _token = Object();
-  static FilamentViewPlatform _instance = FilamentView();
+  static final FilamentViewPlatform _instance = FilamentView();
 
   static FilamentViewPlatform get instance => _instance;
 

lib/view/filament_widget.dart

@@ -1,4 +1,8 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
+import 'package:polyvox_filament/view/filament_view.dart';
 
 import '../filament_controller.dart';
 import 'filament_view_platform.dart';

pubspec.yaml

@@ -27,6 +27,9 @@ flutter:
     #- assets/lit_fade.filamat
   plugin:
     platforms:
+      android:
+        pluginClass: PolyvoxFilamentPlugin
+        package: app.polyvox.filament
       ios:
         pluginClass: PolyvoxFilamentPlugin
       windows: