feat: Rename Gizmo material to UnlitFixedSize, and expose methods for using this material on other entities. Also exposes new methods for setting single float parameters.

thermion_dart/lib/src/viewer/src/ffi/src/thermion_dart.g.dart

@@ -621,6 +621,15 @@ external int get_bone(
   int boneIndex,
 );
 
+@ffi.Native<
+    ffi.Pointer<TGizmo> Function(ffi.Pointer<TSceneManager>, ffi.Pointer<TView>,
+        ffi.Pointer<TScene>)>(isLeaf: true)
+external ffi.Pointer<TGizmo> SceneManager_createGizmo(
+  ffi.Pointer<TSceneManager> tSceneManager,
+  ffi.Pointer<TView> tView,
+  ffi.Pointer<TScene> tScene,
+);
+
 @ffi.Native<
     EntityId Function(
         ffi.Pointer<TSceneManager>,
@@ -658,6 +667,14 @@ external ffi.Pointer<TMaterialInstance>
   ffi.Pointer<TSceneManager> sceneManager,
 );
 
+@ffi.Native<
+    ffi.Pointer<TMaterialInstance> Function(
+        ffi.Pointer<TSceneManager>)>(isLeaf: true)
+external ffi.Pointer<TMaterialInstance>
+    SceneManager_createUnlitFixedSizeMaterialInstance(
+  ffi.Pointer<TSceneManager> sceneManager,
+);
+
 @ffi.Native<
     ffi.Bool Function(ffi.Pointer<TSceneManager>, EntityId,
         ffi.Pointer<ffi.Double>)>(isLeaf: true)
@@ -1206,6 +1223,15 @@ external void MaterialInstance_setParameterFloat2(
   double y,
 );
 
+@ffi.Native<
+    ffi.Void Function(ffi.Pointer<TMaterialInstance>, ffi.Pointer<ffi.Char>,
+        ffi.Double)>(isLeaf: true)
+external void MaterialInstance_setParameterFloat(
+  ffi.Pointer<TMaterialInstance> materialInstance,
+  ffi.Pointer<ffi.Char> name,
+  double value,
+);
+
 @ffi.Native<TViewport Function(ffi.Pointer<TView>)>(isLeaf: true)
 external TViewport View_getViewport(
   ffi.Pointer<TView> view,
@@ -1608,6 +1634,20 @@ external void SceneManager_createUnlitMaterialInstanceRenderThread(
       callback,
 );
 
+@ffi.Native<
+    ffi.Void Function(
+        ffi.Pointer<TSceneManager>,
+        ffi.Pointer<
+            ffi.NativeFunction<
+                ffi.Void Function(
+                    ffi.Pointer<TMaterialInstance>)>>)>(isLeaf: true)
+external void SceneManager_createUnlitFixedSizeMaterialInstanceRenderThread(
+  ffi.Pointer<TSceneManager> sceneManager,
+  ffi.Pointer<
+          ffi.NativeFunction<ffi.Void Function(ffi.Pointer<TMaterialInstance>)>>
+      callback,
+);
+
 @ffi.Native<
         ffi.Void Function(
             ffi.Pointer<TSceneManager>,
@@ -2028,15 +2068,6 @@ void Camera_setProjection(
       far,
     );
 
-@ffi.Native<
-    ffi.Pointer<TGizmo> Function(ffi.Pointer<TEngine>, ffi.Pointer<TView>,
-        ffi.Pointer<TScene>)>(isLeaf: true)
-external ffi.Pointer<TGizmo> Gizmo_new(
-  ffi.Pointer<TEngine> tEngine,
-  ffi.Pointer<TView> tView,
-  ffi.Pointer<TScene> tScene,
-);
-
 @ffi.Native<
     ffi.Void Function(ffi.Pointer<TGizmo>, ffi.Uint32, ffi.Uint32,
         GizmoPickCallback)>(isLeaf: true)

thermion_dart/lib/src/viewer/src/ffi/src/thermion_viewer_ffi.dart

@@ -2035,6 +2035,9 @@ class ThermionViewerFFI extends ThermionViewer {
     destroy_material_instance(_sceneManager!, materialInstance._pointer);
   }
 
+  ///
+  ///
+  ///
   Future<ThermionFFIMaterialInstance> createUnlitMaterialInstance() async {
     var instance = await withPointerCallback<TMaterialInstance>((cb) {
       SceneManager_createUnlitMaterialInstanceRenderThread(_sceneManager!, cb);
@@ -2045,6 +2048,19 @@ class ThermionViewerFFI extends ThermionViewer {
     return ThermionFFIMaterialInstance(instance);
   }
 
+  ///
+  ///
+  ///
+  Future<ThermionFFIMaterialInstance> createUnlitFixedSizeMaterialInstance() async {
+    var instance = await withPointerCallback<TMaterialInstance>((cb) {
+      SceneManager_createUnlitFixedSizeMaterialInstanceRenderThread(_sceneManager!, cb);
+    });
+    if (instance == nullptr) {
+      throw Exception("Failed to create material instance");
+    }
+    return ThermionFFIMaterialInstance(instance);
+  }
+
   @override
   Future setMaterialPropertyInt(ThermionEntity entity, String propertyName,
       int materialIndex, int value) {
@@ -2163,7 +2179,7 @@ class ThermionViewerFFI extends ThermionViewer {
   Future<Gizmo> createGizmo(FFIView view) async {
     var view = (await getViewAt(0)) as FFIView;
     var scene = View_getScene(view.view);
-    final gizmo = Gizmo_new(Viewer_getEngine(_viewer!), view.view, scene);
+    final gizmo = SceneManager_createGizmo(_sceneManager!, view.view, scene);
     return FFIGizmo(gizmo, this);
   }
 }
@@ -2194,6 +2210,12 @@ class ThermionFFIMaterialInstance extends MaterialInstance {
     MaterialInstance_setParameterFloat2(
         _pointer, name.toNativeUtf8().cast<Char>(), x, y);
   }
+
+  @override
+  Future setParameterFloat(String name, double value) async {
+    MaterialInstance_setParameterFloat(
+        _pointer, name.toNativeUtf8().cast<Char>(), value);
+  }
 }
 
 class FFIRenderTarget extends RenderTarget {

thermion_dart/lib/src/viewer/src/shared_types/material.dart

@@ -2,6 +2,7 @@ abstract class MaterialInstance {
   Future setDepthWriteEnabled(bool enabled);
   Future setDepthCullingEnabled(bool enabled);
   Future setParameterFloat2(String name, double x, double y);
+  Future setParameterFloat(String name, double x);
 }
 
 enum AlphaMode { OPAQUE, MASK, BLEND }

thermion_dart/lib/src/viewer/src/thermion_viewer_base.dart

@@ -895,6 +895,11 @@ abstract class ThermionViewer {
   ///
   Future<MaterialInstance> createUnlitMaterialInstance();
 
+  ///
+  ///
+  ///
+  Future<MaterialInstance> createUnlitFixedSizeMaterialInstance();
+
   ///
   ///
   ///

thermion_dart/lib/src/viewer/src/web_wasm/src/material_instance.dart

@@ -21,4 +21,10 @@ class ThermionWasmMaterialInstance extends MaterialInstance {
     // TODO: implement setParameterFloat2
     throw UnimplementedError();
   }
+  
+  @override
+  Future setParameterFloat(String name, double x) {
+    // TODO: implement setParameterFloat
+    throw UnimplementedError();
+  }
 }