Add TextureViewer sample

Author: Ravbug

CMakeLists.txt

@@ -205,5 +205,6 @@ add_sample("Rendering")
 add_sample("SoundDynamics")
 add_sample("SceneViewer")
 add_sample("Rats")
+add_sample("TextureViewer")
 
 target_link_libraries(RavEngineSceneViewer PUBLIC rve_importlib assimp)

RavEngine

@@ -0,0 +1,97 @@
+#include <RavEngine/App.hpp>
+#include <RavEngine/StaticMesh.hpp>
+#include <RavEngine/World.hpp>
+#include <RavEngine/CameraComponent.hpp>
+#include <RavEngine/GameObject.hpp>
+#include <RavEngine/Dialogs.hpp>
+#include <RavEngine/StartApp.hpp>
+#include <RavEngine/MeshCollection.hpp>
+#include <SDL3/SDL_dialog.h>
+#include <RavEngine/Window.hpp>
+
+using namespace RavEngine;
+using namespace std;
+
+
+
+struct TextureViewerWorld : public RavEngine::World {	
+ 
+	Ref<PBRMaterialInstance> mat;
+	ComponentHandle<Transform> planeTransform;
+	TextureViewerWorld() {
+		
+		auto cubeEntity = Instantiate<GameObject>();
+
+		mat = RavEngine::New<PBRMaterialInstance>(Material::Manager::Get<PBRMaterial>());
+		auto mesh = MeshCollectionStaticManager::Get("quad");
+		cubeEntity.EmplaceComponent<StaticMesh>(mesh, mat);
+		cubeEntity.GetTransform().LocalRotateDelta(vector3{deg_to_rad(90),0.f,0.f});
+		planeTransform = cubeEntity;
+
+		auto cameraEntity = Instantiate<GameObject>();
+
+		auto& cameraComponent = cameraEntity.EmplaceComponent<CameraComponent>();
+
+		cameraComponent.SetActive(true);
+
+		cubeEntity.GetTransform().LocalTranslateDelta(vector3(0, 0, -5));
+
+		auto lightsEntity = Instantiate<GameObject>();
+		lightsEntity.EmplaceComponent<DirectionalLight>().SetIntensity(4);
+		lightsEntity.EmplaceComponent<AmbientLight>().SetIntensity(0.2);
+
+		lightsEntity.GetTransform().LocalRotateDelta(vector3{ deg_to_rad(45), deg_to_rad(45),0 });
+	}
+
+	void LoadTexture(const Filesystem::Path& path) {
+		auto tx = New<Texture>(path);
+		mat->SetAlbedoTexture(tx);
+		auto dim = tx->GetTextureSize();;
+		auto aspect = (float)dim.width / dim.height;
+		planeTransform->SetLocalScale({ aspect,1,1 });
+	}
+};
+
+struct TextureViewerApp : public RavEngine::App {
+	constexpr static SDL_DialogFileFilter filters[] = { {"Any file", "*"} };
+
+	Ref<TextureViewerWorld> world;
+
+	void OnStartup(int argc, char** argv) final {
+
+		SetWindowTitle("TextureViewer");
+
+		world = RavEngine::New<TextureViewerWorld>();
+
+		AddWorld(world);
+		LoadNewTexture();
+	}
+
+	void OnFatal(const std::string_view msg) final {
+		RavEngine::Dialog::ShowBasic("Fatal Error", msg, Dialog::MessageBoxType::Error);
+	}
+
+	void LoadNewTexture() {
+		SDL_ShowOpenFileDialog([](void* userdata, const char* const* filelist, int filter) {
+
+			auto app = static_cast<TextureViewerApp*>(userdata);
+			if (filelist == nullptr) {
+				Debug::Fatal("An error occured: {}", SDL_GetError());
+				app->Quit();
+			}
+			if (filelist && *filelist) {
+				Filesystem::Path chosenFile(*filelist);
+				app->DispatchMainThread([app,chosenFile] {
+					app->world->LoadTexture(chosenFile);
+				});
+			}
+			else {
+				app->Quit();
+			}
+
+
+			}, this, GetMainWindow()->window, filters, std::size(filters), NULL, false);
+	}
+};
+
+START_APP(TextureViewerApp)