Adding nlohmanns json library

src/Engine/Scene/Scene.cpp

@@ -0,0 +1,61 @@
+#include "Scene.h"
+#include "Components/PrimitiveComponent.h"
+#include "Material/MaterialInstance.h"
+#include "Material/Material.h"
+
+using namespace Seele;
+
+Scene::Scene()
+{
+}
+
+Scene::~Scene()
+{
+}
+
+void Scene::tick(float deltaTime)
+{
+    for (auto actor : rootActors)
+    {
+        actor->tick(deltaTime);
+    }
+}
+
+void Scene::addActor(PActor actor)
+{
+    rootActors.add(actor);
+    actor->notifySceneAttach(this);
+}
+
+void Scene::addPrimitiveComponent(PPrimitiveComponent comp)
+{
+    primitives.add(comp);
+}
+
+Map<PMaterial, DrawState> Scene::getMeshBatches()
+{
+    meshBatches.clear();
+    for (auto primitive : primitives)
+    {
+        PMaterialInstance matInstance = primitive->instance;
+        PMaterial mat = matInstance->getBaseMaterial();
+        DrawInstance inst;
+        inst.instance = primitive->instance;
+        inst.vertexBuffer = primitive->vertexBuffer;
+        inst.indexBuffer = primitive->indexBuffer;
+        inst.modelMatrix = primitive->getRenderMatrix();
+
+        if (meshBatches.find(mat) != meshBatches.end())
+        {
+            DrawState &state = meshBatches[mat];
+            state.instances.add(inst);
+        }
+        else
+        {
+            DrawState state;
+            state.instances.add(inst);
+            meshBatches[mat] = state;
+        }
+    }
+    return meshBatches;
+}