internal: store bounding box with SceneAsset rather than recalculating from renderables

thermion_dart/native/include/c_api/TSceneAsset.h

@@ -21,6 +21,7 @@ extern "C"
     EMSCRIPTEN_KEEPALIVE TSceneAsset *SceneAsset_getInstance(TSceneAsset *tSceneAsset, int index);
     EMSCRIPTEN_KEEPALIVE size_t SceneAsset_getInstanceCount(TSceneAsset *tSceneAsset);
     EMSCRIPTEN_KEEPALIVE TSceneAsset * SceneAsset_createInstance(TSceneAsset *asset, TMaterialInstance **materialInstances, int materialInstanceCount);
+    EMSCRIPTEN_KEEPALIVE Aabb3 SceneAsset_getBoundingBox(TSceneAsset *asset);
     
 #ifdef __cplusplus
 }

thermion_dart/native/include/scene/GeometrySceneAsset.hpp

@@ -122,6 +122,10 @@ namespace thermion
             return Entity(); // not currently implemented
         }
 
+        const filament::Aabb getBoundingBox() const override {
+            return _boundingBox;
+        }
+
         static std::unique_ptr<GeometrySceneAsset> create(
             float *vertices, uint32_t numVertices,
             float *normals, uint32_t numNormals,
@@ -136,7 +140,7 @@ namespace thermion
         VertexBuffer *_vertexBuffer = nullptr;
         IndexBuffer *_indexBuffer = nullptr;
         std::vector<MaterialInstance*> _materialInstances;
-        Box _boundingBox;
+        Aabb _boundingBox;
         GeometrySceneAsset *_instanceOwner = std::nullptr_t();
         utils::Entity _entity;
         RenderableManager::PrimitiveType _primitiveType;

thermion_dart/native/include/scene/Gizmo.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <utils/Entity.h>
+#include <filament/Box.h>
 #include <filament/Engine.h>
 #include <filament/Material.h>
 #include <filament/MaterialInstance.h>
@@ -145,6 +146,10 @@ namespace thermion
 
         math::mat4f getRotationForAxis(Gizmo::Axis axis);
 
+        const filament::Aabb getBoundingBox() const override {
+            return _boundingBox;
+        }
+
     private:
         SceneAsset *_source;
         Engine *_engine;
@@ -161,6 +166,8 @@ namespace thermion
         std::vector<utils::Entity> _entities;
         std::vector<MaterialInstance *> _materialInstances;
 
+        filament::Aabb _boundingBox;
+
         GizmoPickResultType getPickResult(utils::Entity entity)
         {
             if (entity.isNull())

thermion_dart/native/include/scene/GltfSceneAsset.hpp

@@ -167,6 +167,10 @@ namespace thermion
             return entities[0];
         }
 
+        const filament::Aabb getBoundingBox() const override {
+            return _asset->getBoundingBox();
+        }
+
     private:
         gltfio::FilamentAsset *_asset;
         gltfio::AssetLoader *_assetLoader;

thermion_dart/native/include/scene/GltfSceneAssetInstance.hpp

@@ -159,7 +159,9 @@ namespace thermion
             }
         }
 
-
+        const filament::Aabb getBoundingBox() const override {
+            return _instance->getBoundingBox();
+        }
 
     private:
         filament::Engine *_engine;

thermion_dart/native/include/scene/GridOverlay.hpp

@@ -48,6 +48,10 @@ public:
     const Entity* getChildEntities() override;
     Entity findEntityByName(const char* name) override;
 
+    const filament::Aabb getBoundingBox() const override {
+        return filament::Aabb();
+    }
+
 private:
     Engine& _engine;
     utils::Entity _gridEntity;

thermion_dart/native/include/scene/SceneAsset.hpp

@@ -2,10 +2,12 @@
 
 #include <memory>
 
-#include <utils/Entity.h>
-#include <gltfio/FilamentAsset.h>
 #include <filament/Scene.h>
 
+#include <gltfio/FilamentAsset.h>
+#include <math.h>
+#include <utils/Entity.h>
+
 #include "CustomGeometry.hpp"
 #include "Log.hpp"
 
@@ -51,6 +53,8 @@ class SceneAsset {
         virtual void setPriority(RenderableManager& rm, int mask) = 0;
         virtual void setLayer(RenderableManager& rm, int layer) = 0;
 
+        virtual const filament::Aabb getBoundingBox() const = 0;
+
 
     
 };