add setViewFrustumCulling, zoomDelta for gesture detector and cleanup

example/lib/main.dart

@@ -53,6 +53,7 @@ class _ExampleWidgetState extends State<ExampleWidget> {
   bool _initialized = false;
 
   bool _coneHidden = false;
+  bool _frustumCulling = true;
 
   @override
   void initState() {
@@ -251,6 +252,14 @@ class _ExampleWidgetState extends State<ExampleWidget> {
       _filamentController.moveCameraToAsset(_cube!);
     }, "Move camera to asset"));
 
+    children.add(_item(() {
+      setState(() {
+        _frustumCulling = !_frustumCulling;
+      });
+
+      _filamentController.setViewFrustumCulling(_frustumCulling);
+    }, "${_frustumCulling ? "Disable" : "Enable"} frustum culling"));
+
     return Stack(children: [
       Positioned.fill(
           bottom: 100,

lib/filament_controller.dart

@@ -527,6 +527,13 @@ class FilamentController {
     await _channel.invokeMethod("moveCameraToAsset", asset);
   }
 
+  Future setViewFrustumCulling(bool enabled) async {
+    if (_viewer == null || _resizing) {
+      throw Exception("No viewer available, ignoring");
+    }
+    await _channel.invokeMethod("setViewFrustumCulling", enabled);
+  }
+
   Future setCameraExposure(
       double aperture, double shutterSpeed, double sensitivity) async {
     if (_viewer == null || _resizing) {

lib/filament_gesture_detector.dart

@@ -13,13 +13,15 @@ class FilamentGestureDetector extends StatefulWidget {
   final FilamentController controller;
   final bool showControlOverlay;
   final bool enableControls;
+  final double zoomDelta;
 
   const FilamentGestureDetector(
       {Key? key,
       required this.controller,
       this.child,
       this.showControlOverlay = false,
-      this.enableControls = true})
+      this.enableControls = true,
+      this.zoomDelta = 1})
       : super(key: key);
 
   @override
@@ -91,8 +93,9 @@ class _FilamentGestureDetectorState extends State<FilamentGestureDetector> {
                 if (pointerSignal is PointerScrollEvent) {
                   _scrollTimer?.cancel();
                   widget.controller.zoomBegin();
-                  widget.controller
-                      .zoomUpdate(pointerSignal.scrollDelta.dy > 0 ? 1 : -1);
+                  widget.controller.zoomUpdate(pointerSignal.scrollDelta.dy > 0
+                      ? widget.zoomDelta
+                      : -widget.zoomDelta);
                   _scrollTimer = Timer(Duration(milliseconds: 100), () {
                     widget.controller.zoomEnd();
                     _scrollTimer = null;
@@ -118,7 +121,6 @@ class _FilamentGestureDetectorState extends State<FilamentGestureDetector> {
             ? null
             : (PointerMoveEvent d) async {
                 if (d.buttons == kTertiaryButton || _rotating) {
-                  print("Updating at ${d.position}");
                   widget.controller
                       .rotateUpdate(d.position.dx * 2.0, d.position.dy * 2.0);
                 } else {

macos/Classes/SwiftPolyvoxFilamentPlugin.swift

@@ -619,6 +619,9 @@ public class SwiftPolyvoxFilamentPlugin: NSObject, FlutterPlugin, FlutterTexture
         case "moveCameraToAsset":
             move_camera_to_asset(viewer, call.arguments as! EntityId)
             result(true)
+        case "setViewFrustumCulling":
+            set_view_frustum_culling(viewer, call.arguments as! Bool)
+            result(true)
         case "setCameraPosition":
             let args = call.arguments as! [Any]
             set_camera_position(viewer, Float(args[0] as! Double), Float(args[1] as! Double), Float(args[2] as! Double))

macos/include/FilamentViewer.hpp

@@ -82,6 +82,7 @@ namespace polyvox {
             void clearBackgroundImage();
             void setBackgroundImagePosition(float x, float y, bool clamp);
             void moveCameraToAsset(EntityId entityId);
+            void setViewFrustumCulling(bool enabled);
             void setCameraExposure(float aperture, float shutterSpeed, float sensitivity);
             void setCameraPosition(float x, float y, float z);
             void setCameraRotation(float rads, float x, float y, float z);

macos/include/PolyvoxFilamentApi.h

@@ -90,6 +90,7 @@ void set_position(void* assetManager, EntityId asset, float x, float y, float z)
 void set_rotation(void* assetManager, EntityId asset, float rads, float x, float y, float z);
 void set_scale(void* assetManager, EntityId asset, float scale);
 void move_camera_to_asset(const void* const viewer, EntityId asset);
+void set_view_frustum_culling(const void* const viewer, bool enabled);
 void set_camera_exposure(const void* const viewer, float aperture, float shutterSpeed, float sensitivity);
 void set_camera_position(const void* const viewer, float x, float y, float z);
 void set_camera_rotation(const void* const viewer, float rads, float x, float y, float z);

macos/src/FilamentViewer.cpp

@@ -872,7 +872,14 @@ void FilamentViewer::moveCameraToAsset(EntityId entityId) {
   const filament::Aabb bb = asset->getBoundingBox();
   auto corners = bb.getCorners();
   Camera& cam =_view->getCamera();
-  cam.lookAt(corners.vertices[0], corners.vertices[7]);   
+  auto eye = corners.vertices[0] * 1.5;
+  auto lookAt = corners.vertices[7];
+  cam.lookAt(eye, lookAt);     
+  Log("Moved camera to %f %f %f, lookAt %f %f %f, near %f far %f", eye[0], eye[1], eye[2], lookAt[0], lookAt[1], lookAt[2], cam.getNear(), cam.getCullingFar());
+}
+
+void FilamentViewer::setViewFrustumCulling(bool enabled) { 
+  _view->setFrustumCullingEnabled(enabled);
 }
 
 void FilamentViewer::setCameraPosition(float x, float y, float z) {
@@ -929,7 +936,7 @@ void FilamentViewer::grabUpdate(float x, float y) {
         return;
     }
     Camera& cam =_view->getCamera();
-    auto eye =  cam.getPosition();// math::float3  {0.0f, 0.5f, 50.0f } ;// ; //
+    auto eye =  cam.getPosition();
     auto target = eye + cam.getForwardVector();
     auto upward = cam.getUpVector();
     Viewport const& vp = _view->getViewport();
@@ -938,9 +945,7 @@ void FilamentViewer::grabUpdate(float x, float y) {
         cam.setModelMatrix(trans);
     } else {
         auto trans = cam.getModelMatrix() * mat4::rotation(
-                                                   
-                                                          0.01,
-//                                                           math::float3 { 0.0f, 1.0f, 0.0f });
+                                                   0.02,
                                                            math::float3 { (y - _startY) / vp.height, (x - _startX) / vp.width, 0.0f });
         cam.setModelMatrix(trans);
     }

macos/src/PolyvoxFilamentApi.cpp

@@ -101,6 +101,10 @@ extern "C" {
       ((FilamentViewer*)viewer)->moveCameraToAsset(asset);
   }
 
+  FLUTTER_PLUGIN_EXPORT void set_view_frustum_culling(const void* const viewer, bool enabled) {
+      ((FilamentViewer*)viewer)->setViewFrustumCulling(enabled);
+  }  
+
   FLUTTER_PLUGIN_EXPORT void set_camera_focus_distance(const void* const viewer, float distance) {
       ((FilamentViewer*)viewer)->setCameraFocusDistance(distance);
   }