feat: add selection to meshrendercomponent

lightkeeper/src/LightkeeperDebugUi.cpp

@@ -10,7 +10,10 @@
 #include <destrum/Graphics/Managers/Renderer2D.h>
 #include <destrum/Input/InputManager.h>
 #include <destrum/ObjectModel/GameObject.h>
+#include <destrum/Scene/ModelSpawner.h>
 #include <destrum/Scene/Scene.h>
+#include <destrum/Util/AssetBrowser.h>
+#include <destrum/Util/ModelDoc.h>
 #include <destrum/Serialization/PrefabSerializer.h>
 #include <destrum/Serialization/SceneSerializer.h>
 
@@ -23,6 +26,7 @@
 #include <string_view>
 
 #include "imgui.h"
+#include "spdlog/spdlog.h"
 
 namespace {
     std::filesystem::path ResolveScenePath(
@@ -187,6 +191,32 @@ void LightKeeper::drawDebugMenuBar()
     ImGui::EndMainMenuBar();
 }
 
+void LightKeeper::onViewportAssetDropped(std::string_view path)
+{
+    if (!AssetBrowser::IsModel(path)) {
+        sceneStatus = "Only models can be dropped in the viewport: " + std::string{path};
+        return;
+    }
+
+    ModelDoc::LoadOptions options{};
+    options.meshImportMode = ModelDoc::MeshImportMode::MergedPerNode;
+    options.loadMaterials = true;
+
+    try {
+        Scene& scene = SceneManager::GetInstance().GetCurrentScene();
+        const std::string name = std::filesystem::path{path}.stem().string();
+        GameObject* model = ModelSpawner::SpawnStaticModel(scene, gfxDevice, resources, path, options, name);
+
+        const Camera& view = getViewCamera();
+        model->GetTransform().SetWorldPosition(view.GetPosition() + view.GetForward() * 5.0f);
+        scene.SetSelectedObject(model->GetId());
+        sceneStatus = "Placed " + std::string{path};
+    } catch (const std::exception& exception) {
+        spdlog::error("Could not place {}: {}", path, exception.what());
+        sceneStatus = "Could not place " + std::string{path};
+    }
+}
+
 void LightKeeper::drawViewportOverlay()
 {
     if (!showTransformGizmo || isPlayerViewActive()) {