diff --git a/android/src/main/kotlin/app/polyvox/filament/FilamentInterop.kt b/android/src/main/kotlin/app/polyvox/filament/FilamentInterop.kt
index 468a5ad6..9dda5f84 100644
--- a/android/src/main/kotlin/app/polyvox/filament/FilamentInterop.kt
+++ b/android/src/main/kotlin/app/polyvox/filament/FilamentInterop.kt
@@ -46,11 +46,11 @@ interface FilamentInterop : Library {
 
     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 scroll(viewer:Pointer, x:Float, y:Float, delta:Float);
 
-    fun grab_begin(viewer:Pointer, x:Int, y:Int, pan:Boolean)
+    fun grab_begin(viewer:Pointer, x:Float, y:Float, pan:Boolean)
 
-    fun grab_update(viewer:Pointer, x:Int, y:Int)
+    fun grab_update(viewer:Pointer, x:Float, y:Float)
 
     fun grab_end(viewer:Pointer)
 
@@ -90,5 +90,6 @@ interface FilamentInterop : Library {
     fun set_camera_rotation(asset:Pointer, rads:Float, x:Float, y:Float, z:Float);
     fun set_camera_focal_length(asset:Pointer, focalLength:Float);
     fun set_camera_focus_distance(asset:Pointer, focusDistance:Float);
+    fun set_scale(asset:Pointer, scale:Float);
 }
 
diff --git a/android/src/main/kotlin/app/polyvox/filament/PolyvoxFilamentPlugin.kt b/android/src/main/kotlin/app/polyvox/filament/PolyvoxFilamentPlugin.kt
index 3b8033a8..903a9b2c 100644
--- a/android/src/main/kotlin/app/polyvox/filament/PolyvoxFilamentPlugin.kt
+++ b/android/src/main/kotlin/app/polyvox/filament/PolyvoxFilamentPlugin.kt
@@ -283,6 +283,14 @@ class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
             result.success("OK");
           }
         }
+        "setScale" -> {
+          executor.execute { 
+            val args = call.arguments as ArrayList<*>
+            val assetPtr = Pointer(args[0] as Long)
+            _lib.set_scale(assetPtr, (args[1] as Double).toFloat())
+            result.success("OK");
+          }
+        }
         "setRotation" -> {
           executor.execute { 
             val args = call.arguments as ArrayList<*>
@@ -344,7 +352,8 @@ class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
         }
         "zoom" -> {
           executor.execute { 
-            _lib.scroll(_viewer!!, 0.0f, 0.0f, (call.arguments as Double).toFloat())
+            val args = call.arguments as ArrayList<*>
+            _lib.scroll(_viewer!!, (args[0] as Double).toFloat(), (args[1] as Double).toFloat(), (args[2] as Double).toFloat())
             result.success("OK");
           }
         }
@@ -402,14 +411,17 @@ class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
         "panStart" -> {
           executor.execute { 
             val args = call.arguments as ArrayList<Any?>
-            _lib.grab_begin(_viewer!!, args[0] as Int, args[1] as Int, true)
+            _lib.grab_begin(_viewer!!, (args[0] as Double).toFloat(), (args[1] as Double).toFloat(), true)
             result.success("OK");
           }
         }
         "panUpdate" -> {
           executor.execute { 
             val args = call.arguments as ArrayList<Any?>
-            _lib.grab_update(_viewer!!, args[0] as Int, args[1] as Int)
+            val x = (args[0] as Double).toFloat()
+            val y = (args[1] as Double).toFloat()
+            Log.v(TAG, "panUpdate ${x} ${y}")
+            _lib.grab_update(_viewer!!, x, y)
             result.success("OK");
           }
         }
@@ -422,14 +434,14 @@ class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
         "rotateStart" -> {
           executor.execute { 
             val args = call.arguments as ArrayList<Any?>
-            _lib.grab_begin(_viewer!!, args[0] as Int, args[1] as Int, false)
+            _lib.grab_begin(_viewer!!, (args[0] as Double).toFloat(), (args[1] as Double).toFloat(), false)
             result.success("OK");
           }
         }
         "rotateUpdate" -> {
           executor.execute { 
             val args = call.arguments as ArrayList<Any?>
-            _lib.grab_update(_viewer!!, args[0] as Int, args[1] as Int)
+            _lib.grab_update(_viewer!!, (args[0] as Double).toFloat(), (args[1] as Double).toFloat())
             result.success("OK");
           }
         }
@@ -442,14 +454,14 @@ class PolyvoxFilamentPlugin: FlutterPlugin, MethodCallHandler, ActivityAware {
         "grabStart" -> {
           executor.execute { 
             val args = call.arguments as ArrayList<Any?>
-            _lib.grab_begin(_viewer!!, args[0] as Int, args[1] as Int, true)
+            _lib.grab_begin(_viewer!!, (args[0] as Double).toFloat(), (args[1] as Double).toFloat(), true)
             result.success("OK");
           }
         }
         "grabUpdate" -> {
           executor.execute { 
             val args = call.arguments as ArrayList<Any?>
-            _lib.grab_update(_viewer!!, args[0] as Int, args[1] as Int)
+            _lib.grab_update(_viewer!!, (args[0] as Double).toFloat(), (args[1] as Double).toFloat())
             result.success("OK");
           }
         }