Added render list so the cube actually shows up.

private/sdl_gpu_test/gui/ui_renderer.hpp

@@ -67,7 +67,7 @@ class UIRenderer
 public:
     using primitive_id_t = std::uint64_t;
 
-    static constexpr std::uint64_t UNSET_PRIMITIVE_ID = 0;
+    static constexpr primitive_id_t UNSET_PRIMITIVE_ID = 0;
 private:
     Application* mApplication = nullptr;
     sdlpp::GPUBuffer mVertexBuffer;

private/sdl_gpu_test/scene/mesh.cpp

@@ -15,6 +15,7 @@ void MeshNode::setMesh(std::string resourcePath)
     if (mScene != nullptr)
     {
         updateMesh();
+        updateSceneMesh();
     }
 }
 
@@ -25,6 +26,7 @@ void MeshNode::setTexture(std::string resourcePath)
     if (mScene != nullptr)
     {
         updateTexture();
+        updateSceneMesh();
     }
 }
 
@@ -34,6 +36,7 @@ void MeshNode::handleEnteredScene()
 
     updateMesh();
     updateTexture();
+    updateSceneMesh();
 }
 
 void MeshNode::updateMesh()
@@ -59,4 +62,16 @@ void MeshNode::updateTexture()
         mTexture = mScene->getRenderer().getTexture(mTexturePath);
     }
 }
+
+void MeshNode::updateSceneMesh()
+{
+    if (mMeshId == SceneRenderer::UNSET_MESH_ID || !mScene->getRenderer().updateRenderListEntry(mMeshId, {
+        .mesh = mMesh,
+        .texture = mTexture,
+        .transform = mTransform
+    }))
+    {
+        mScene->getRenderer().addMeshToRenderList(mMesh, mTexture, mTransform, mMeshId);
+    }
+}
 }

private/sdl_gpu_test/scene/mesh.hpp

@@ -25,6 +25,7 @@ private:
     std::shared_ptr<SceneTexture> mTexture;
     std::string mMeshPath;
     std::string mTexturePath;
+    SceneRenderer::mesh_id_t mMeshId = SceneRenderer::UNSET_MESH_ID;
 public:
     MeshNode(MeshNodeCreateArgs args);
 
@@ -35,6 +36,7 @@ public:
 private:
     void updateMesh();
     void updateTexture();
+    void updateSceneMesh();
 };
 } // namespace sdl_gpu_test
 

private/sdl_gpu_test/scene/scene.cpp

@@ -38,5 +38,6 @@ void Scene::init(const SceneInitArgs& args)
 {
     MIJIN_ASSERT_FATAL(args.renderer != nullptr, "Missing parameter: renderer.");
     mRenderer = args.renderer;
+    mRootNode.enterScene(this, nullptr);
 }
 }

private/sdl_gpu_test/scene/scene.hpp

@@ -42,6 +42,8 @@ public:
     }
 private:
     void enterScene(Scene* scene, SceneNode* parent);
+
+    friend class Scene;
 };
 
 struct SceneInitArgs

private/sdl_gpu_test/scene/scene_renderer.cpp

@@ -22,6 +22,7 @@ void SceneRenderer::init(Application& application)
 {
     mApplication = &application;
 
+    createPipeline();
     mSampler.create(mApplication->getDevice(), {});
 }
 
@@ -61,13 +62,13 @@ std::shared_ptr<SceneTexture> SceneRenderer::getTexture(const std::string& resou
         mCachedTextures.erase(it);
     }
 
-    const Bitmap bitmap = loadBitmap(mApplication->getFileSystem().getPath(resourcePath));
-    std::shared_ptr<SceneTexture> result = std::make_shared<SceneTexture>();
-    result->texture.create(mApplication->getDevice(), {
+    sdlpp::GPUTextureCreateArgs textureArgs =
+    {
         .format = sdlpp::GPUTextureFormat::R8G8B8A8_UNORM_SRGB,
         .usage = {.sampler = true}
-    });
-    mApplication->uploadTextureData(result->texture, bitmap);
+    };
+    std::shared_ptr<SceneTexture> result = std::make_shared<SceneTexture>();
+    result->texture = mApplication->loadTexture(resourcePath, textureArgs);
     mCachedTextures.emplace(resourcePath, result);
     return result;
 }
@@ -117,6 +118,72 @@ void SceneRenderer::render(const SceneRendererRenderArgs& args)
     renderPass.end();
 }
 
+void SceneRenderer::addMeshToRenderList(std::shared_ptr<SceneMesh> mesh, std::shared_ptr<SceneTexture> texture,
+                                        const Transform3D& transform, mesh_id_t& inOutMeshId)
+{
+    if (inOutMeshId == UNSET_MESH_ID)
+    {
+        inOutMeshId = mNextMeshId;
+        ++mNextMeshId;
+    }
+    mRenderList.push_back({
+        .mesh = std::move(mesh),
+        .texture = std::move(texture),
+        .transform = transform,
+        .meshId = inOutMeshId
+    });
+}
+
+bool SceneRenderer::removeMeshFromRenderList(SceneRenderer::mesh_id_t meshId)
+{
+    if (meshId == UNSET_MESH_ID)
+    {
+        return false;
+    }
+
+    auto it = std::find_if(mRenderList.begin(), mRenderList.end(), [&](const RenderListEntry& entry)
+    {
+        return entry.meshId == meshId;
+    });
+    if (it == mRenderList.end())
+    {
+        return false;
+    }
+    mRenderList.erase(it);
+    return true;
+}
+
+bool SceneRenderer::updateRenderListEntry(mesh_id_t meshId, const RenderListUpdate& update)
+{
+    if (meshId == UNSET_MESH_ID)
+    {
+        return false;
+    }
+
+    auto it = std::find_if(mRenderList.begin(), mRenderList.end(), [&](const RenderListEntry& entry)
+    {
+        return entry.meshId == meshId;
+    });
+    if (it == mRenderList.end())
+    {
+        return false;
+    }
+
+    if (update.mesh.has_value())
+    {
+        it->mesh = *update.mesh;
+    }
+    if (update.texture.has_value())
+    {
+        it->texture = *update.texture;
+    }
+    if (update.transform.has_value())
+    {
+        it->transform = *update.transform;
+    }
+    return true;
+}
+
 void SceneRenderer::createPipeline()
 {
     // create shaders

private/sdl_gpu_test/scene/scene_renderer.hpp

@@ -4,6 +4,7 @@
 #if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_SCENE_SCENE_RENDERER_HPP_INCLUDED)
 #define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_SCENE_SCENE_RENDERER_HPP_INCLUDED 1
 
+#include <optional>
 #include <memory>
 #include <unordered_map>
 #include <vector>
@@ -34,23 +35,33 @@ struct SceneRendererRenderArgs
     unsigned targetTextureHeight;
 };
 
+struct RenderListUpdate
+{
+    std::optional<std::shared_ptr<SceneMesh>> mesh;
+    std::optional<std::shared_ptr<SceneTexture>> texture;
+    std::optional<Transform3D> transform;
+};
+
 class SceneRenderer
 {
 public:
-    using mesh_idx_t = std::uint64_t;
+    using mesh_id_t = std::uint64_t;
+
+    static constexpr mesh_id_t UNSET_MESH_ID = 0;
 private:
     struct RenderListEntry
     {
         std::shared_ptr<SceneMesh> mesh;
         std::shared_ptr<SceneTexture> texture;
         Transform3D transform;
-        mesh_idx_t meshIdx;
+        mesh_id_t meshId;
     };
 
     Application* mApplication = nullptr;
     std::unordered_map<std::string, std::weak_ptr<SceneMesh>> mCachedMeshes;
     std::unordered_map<std::string, std::weak_ptr<SceneTexture>> mCachedTextures;
     std::vector<RenderListEntry> mRenderList;
+    mesh_id_t mNextMeshId = 1;
 
     sdlpp::GPUGraphicsPipeline mPipeline;
     sdlpp::GPUSampler mSampler;
@@ -63,6 +74,11 @@ public:
     [[nodiscard]]
     std::shared_ptr<SceneTexture> getTexture(const std::string& resourcePath);
 
+    void addMeshToRenderList(std::shared_ptr<SceneMesh> mesh, std::shared_ptr<SceneTexture> texture,
+                             const Transform3D& transform, mesh_id_t& inOutMeshId);
+    bool removeMeshFromRenderList(mesh_id_t meshId);
+    bool updateRenderListEntry(mesh_id_t meshId, const RenderListUpdate& update);
+
     void render(const SceneRendererRenderArgs& args);
 private:
     void createPipeline();