feat: add flag for keepData for gltf instancing, add highlightScene, add stencilHighlight method

thermion_dart/native/include/material/UnlitMaterialProvider.hpp

@@ -0,0 +1,72 @@
+#ifndef UNLIT_MATERIAL_PROVIDER_HPP
+#define UNLIT_MATERIAL_PROVIDER_HPP
+
+#include <filament/gltfio/MaterialProvider.h>
+#include <filament/Material.h>
+#include <filament/MaterialInstance.h>
+#include <filament/Texture.h>
+#include <filament/TextureSampler.h>
+#include <math/mat3.h>
+#include <math/vec3.h>
+#include <math/vec4.h>
+
+namespace thermion_filament {
+
+class UnlitMaterialProvider : public filament::gltfio::MaterialProvider {
+private:
+    filament::Material* mUnlitMaterial;
+    const filament::Material* mMaterials[1];
+    filament::Engine* mEngine;
+
+public:
+    UnlitMaterialProvider(filament::Engine* engine, const void* const data, const size_t size) : mEngine(engine) {
+        mUnlitMaterial = filament::Material::Builder()
+            .package(data, size)
+            .build(*engine);
+        mMaterials[0] = mUnlitMaterial;
+    }
+
+    ~UnlitMaterialProvider() {
+        mEngine->destroy(mUnlitMaterial);
+    }
+
+    filament::MaterialInstance* createMaterialInstance(filament::gltfio::MaterialKey* config, 
+                                                       filament::gltfio::UvMap* uvmap,
+                                                       const char* label = "unlit", 
+                                                       const char* extras = nullptr) override {
+        auto instance = mUnlitMaterial->createInstance();
+
+        // Set default parameters
+        instance->setParameter("color", filament::math::float3{1.0f, 1.0f, 1.0f});
+        instance->setParameter("scale", 1.0f);
+
+        return instance;
+    }
+
+    filament::Material* getMaterial(filament::gltfio::MaterialKey* config, 
+                                    filament::gltfio::UvMap* uvmap, 
+                                    const char* label = "unlit") override {
+        return mUnlitMaterial;
+    }
+
+    const filament::Material* const* getMaterials() const noexcept override {
+        return mMaterials;
+    }
+
+    size_t getMaterialsCount() const noexcept override {
+        return 1;
+    }
+
+    void destroyMaterials() override {
+        // Materials are destroyed in the destructor
+    }
+
+    bool needsDummyData(filament::VertexAttribute attrib) const noexcept override {
+        // For unlit material, we don't need dummy data for any attribute
+        return false;
+    }
+};
+
+} // namespace thermion_filament
+
+#endif // UNLIT_MATERIAL_PROVIDER_HPP