finish refactor

.env.example

@@ -1 +0,0 @@
-VULKAN_SDK=/home/tylerm/Documents/Vulkan

Makefile

@@ -1,12 +1,9 @@
-include .env
-
 CC = clang++
 
 INCFLAGS  = -Isrc
 INCFLAGS += -Iengine
 INCFLAGS += -Ilib/glfw/include
 INCFLAGS += -Ilib/glm
-INCFLAGS += -L${VULKAN_SDK}/lib -lvulkan
 
 CCFLAGS  = -std=c++17 -O2 -g
 CCFLAGS += $(INCFLAGS)
@@ -15,6 +12,7 @@ LDFLAGS = -lm
 LDFLAGS += $(INCFLAGS)
 LDFLAGS += lib/glfw/src/libglfw3.a
 LDFLAGS += lib/glm/glm/libglm_static.a
+LDFLAGS += -lvulkan
 
 SRC  = $(shell find src -name "*.cpp")
 SRC += $(shell find engine -name "*.cpp")

engine/xe_engine.cpp

@@ -1,16 +1,14 @@
 #include "xe_engine.hpp"
-#include "xe_descriptors.hpp"
+#include <chrono> 
 
-#include <string>
 namespace xe {
 
-XeEngine::XeEngine(int width, int height, std::string name) 
+XeEngine::XeEngine(int width, int height, std::string name) : xeWindow{width, height, name}, 
-  : xeWindow{width, height, name}, 
+  xeDevice{xeWindow}, 
-    xeDevice{xeWindow}, 
+  xeRenderer{xeWindow, xeDevice},
-    xeRenderer{xeWindow, xeDevice},
+  xeCamera{} {
-    xeCamera{} {
+  loadDescriptors();
-    loadDescriptors();
+};
-  };
 
 void XeEngine::loadDescriptors() {
   xeDescriptorPool = XeDescriptorPool::Builder(xeDevice)
@@ -24,45 +22,27 @@ void XeEngine::loadDescriptors() {
     .build();
 }
 
-std::unique_ptr<XeRenderSystem> XeEngine::createRenderSystem(const std::string &vert, const std::string &frag, uint32_t pushCunstantDataSize, uint32_t uniformBufferDataSize) {
+std::shared_ptr<XeModel> XeEngine::loadModelFromFile(const std::string &filename) {
-  return std::make_unique<XeRenderSystem>(
-    xeDevice,
-    xeRenderer,
-    *xeDescriptorPool,
-    *xeDescriptorSetLayout,
-    vert,
-    frag,
-    pushCunstantDataSize,
-    uniformBufferDataSize
-  );
-}
-
-std::shared_ptr<XeModel> XeEngine::createModel(const std::string &filename) {
   return XeModel::createModelFromFile(xeDevice, filename);
 }
 
-void XeEngine::render(
+std::shared_ptr<XeModel> XeEngine::loadModelFromData(std::vector<XeModel::Vertex> vertices, std::vector<uint32_t> indices) {
-  XeRenderSystem& xeRenderSystem, 
+  XeModel::Builder builder{};
-  std::vector<XeGameObject>& gameObjects,
+  builder.vertices = vertices;
-  void* pushConstantData, 
+  if(&indices == NULL) { 
-  uint32_t pushConstantSize, 
+    builder.indices = indices;
-  void* uniformBufferData, 
+  }
-  uint32_t uniformBufferSize) {
+  return std::make_shared<XeModel>(xeDevice, builder);
+}
 
-  auto commandBuffer = xeRenderer.getCurrentCommandBuffer();
+bool XeEngine::poll() {
-  xeRenderer.beginSwapChainRenderPass(commandBuffer);
+  glfwPollEvents();
-
+  auto newTime = std::chrono::high_resolution_clock::now();
-  xeRenderSystem.renderGameObjects(
+  frameTime = std::chrono::duration<float, std::chrono::seconds::period>(newTime - currentTime).count();
-    xeRenderer.getFrameIndex(),
+  currentTime = newTime;
-    commandBuffer,
+  float aspect = xeRenderer.getAspectRatio();
-    gameObjects,
+  xeCamera.setPerspectiveProjection(glm::radians(FOV), aspect, 0.1f, 100.f);
-    pushConstantData,
+  return !xeWindow.shouldClose();
-    pushConstantSize,
-    uniformBufferData,
-    uniformBufferSize
-  );
-  
-  xeRenderer.endSwapChainRenderPass(commandBuffer);
 }
 
 }

engine/xe_engine.hpp

@@ -3,8 +3,9 @@
 #include "xe_window.hpp"
 #include "xe_device.hpp"
 #include "xe_renderer.hpp"
-#include "xe_render_system.hpp"
+#include "xe_camera.hpp"
 #include "xe_descriptors.hpp"
+#include <chrono> 
 
 #include <string>
 namespace xe {
@@ -14,41 +15,25 @@ class XeEngine {
   public:
 
     XeEngine(int width, int height, std::string name);
+
     ~XeEngine() {};
 
     XeEngine(const XeEngine&) = delete;
     XeEngine operator=(const XeEngine&) = delete;
 
-    XeWindow& getWindow() { 
+    XeWindow& getWindow() {return xeWindow;}
-      return xeWindow; 
+    XeCamera& getCamera() {return xeCamera;}
-    };
 
-    XeRenderer& getRenderer() { 
+    std::shared_ptr<XeModel> loadModelFromFile(const std::string &filename);
-      return xeRenderer; 
+    std::shared_ptr<XeModel> loadModelFromData(std::vector<XeModel::Vertex> vertices, std::vector<uint32_t> indices);
-    };
-
-    XeCamera& getCamera() { 
-      return xeCamera; 
-    };
-
-    std::unique_ptr<XeRenderSystem> createRenderSystem(const std::string &vert, const std::string &frag, uint32_t pushCunstantDataSize, uint32_t uniformBufferDataSize);
-
-    std::shared_ptr<XeModel> createModel(const std::string &filename);
 
     bool beginFrame() { return xeRenderer.beginFrame(); }
-
+    void endFrame() { xeRenderer.endFrame(); }
-    void endFrame() { return xeRenderer.endFrame(); }
-
-    void render(
-      XeRenderSystem& xeRenderSystem, 
-      std::vector<XeGameObject>& gameObjects,
-      void* pushConstantData, 
-      uint32_t pushConstantSize, 
-      void* uniformBufferData, 
-      uint32_t uniformBufferSize);
-
     void close() { vkDeviceWaitIdle(xeDevice.device()); }
 
+    bool poll();
+    float getFrameTime() { return frameTime; }
+
   private:
 
     void loadDescriptors();
@@ -58,8 +43,15 @@ class XeEngine {
     XeRenderer xeRenderer;
     XeCamera xeCamera;
 
+    std::chrono::_V2::system_clock::time_point currentTime;
+    float frameTime;
+
+    float FOV = 50.f;
+
     std::unique_ptr<XeDescriptorPool> xeDescriptorPool;
     std::unique_ptr<XeDescriptorSetLayout> xeDescriptorSetLayout;
+
+    friend class XeRenderSystem;
 };
 
 }

engine/xe_frame_info.hpp

@@ -1,16 +0,0 @@
-#pragma once
-
-#include "xe_camera.hpp"
-
-#include <vulkan/vulkan.h>
-
-namespace xe {
-
-struct XeFrameInfo {
-    int frameIndex;
-    float frameTime;
-    VkCommandBuffer commandBuffer;
-    XeCamera &camera;
-};
-
-}

engine/xe_render_system.cpp

@@ -3,11 +3,11 @@
 #include <vulkan/vulkan.h>
 #include "xe_device.hpp"
 #include "xe_pipeline.hpp"
-#include "xe_frame_info.hpp"
 #include "xe_game_object.hpp"
 #include "xe_swap_chain.hpp"
 #include "xe_renderer.hpp"
 #include "xe_descriptors.hpp"
+#include "xe_engine.hpp"
 
 #include <memory>
 #include <stdexcept>
@@ -17,18 +17,15 @@
 namespace xe {
 
 XeRenderSystem::XeRenderSystem(
-  XeDevice &device, 
+  XeEngine &xeEngine,
-  XeRenderer &renderer, 
-  XeDescriptorPool &xeDescriptorPool, 
-  XeDescriptorSetLayout &xeDescriptorSetLayout, 
   std::string vert,
   std::string frag, 
   uint32_t pushCunstantDataSize, 
   uint32_t uniformBufferDataSize) 
-  : xeDevice{device} {
+  : xeDevice{xeEngine.xeDevice}, xeRenderer{xeEngine.xeRenderer} {
-  createUniformBuffers(xeDescriptorPool, xeDescriptorSetLayout, uniformBufferDataSize);
+  createUniformBuffers(*xeEngine.xeDescriptorPool, *xeEngine.xeDescriptorSetLayout, uniformBufferDataSize);
-  createPipelineLayout(xeDescriptorSetLayout, pushCunstantDataSize, uniformBufferDataSize);
+  createPipelineLayout(*xeEngine.xeDescriptorSetLayout, pushCunstantDataSize, uniformBufferDataSize);
-  createPipeline(renderer.getSwapChainRenderPass(), vert, frag);
+  createPipeline(xeRenderer.getSwapChainRenderPass(), vert, frag);
 }
 
 
@@ -108,55 +105,54 @@ void XeRenderSystem::createPipeline(VkRenderPass renderPass, std::string vert, s
   );
 }
 
-void XeRenderSystem::renderGameObjects(
+void XeRenderSystem::loadPushConstant(void *pushConstantData, uint32_t pushConstantSize) {
-  int frameIndex, 
+  if(!boundPipeline) {
-  VkCommandBuffer commandBuffer, 
+    xeRenderer.beginSwapChainRenderPass(xeRenderer.getCurrentCommandBuffer());
-  std::vector<XeGameObject> &gameObjects, 
+    xePipeline->bind(xeRenderer.getCurrentCommandBuffer());
-  void *pushConstantData, 
+    boundPipeline = true;
-  uint32_t pushConstantSize, 
+  }
-  void* uniformBufferData, 
+  if(!boundDescriptor) {
-  uint32_t uniformBufferSize) {
-
-  uboBuffers[frameIndex]->writeToBuffer(uniformBufferData);
-  uboBuffers[frameIndex]->flush();
-
-  xePipeline->bind(commandBuffer);
-
-  if(pushConstantSize > 0) {
     vkCmdBindDescriptorSets(
-        commandBuffer,
+        xeRenderer.getCurrentCommandBuffer(),
         VK_PIPELINE_BIND_POINT_GRAPHICS,
         pipelineLayout,
         0,
         1,
-        &descriptorSets[frameIndex],
+        &descriptorSets[xeRenderer.getFrameIndex()],
         0,
         nullptr);
+    boundDescriptor = true;
   }
-  
+  vkCmdPushConstants(
-  for (auto& obj: gameObjects) {
+        xeRenderer.getCurrentCommandBuffer(), 
-
-    struct PushConstant {
-      glm::mat4 modelMatrix; 
-      glm::mat4 normalMatrix;
-    };
-
-    PushConstant pc = PushConstant{obj.transform.mat4(), obj.transform.normalMatrix()};
-
-    if(pushConstantSize > 0) {
-      vkCmdPushConstants(
-        commandBuffer, 
         pipelineLayout, 
         VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 
         0, 
         pushConstantSize,
-        &pc);
+        pushConstantData);
-    }
+}
 
-    obj.model->bind(commandBuffer);
+void XeRenderSystem::loadUniformObject(void *uniformBufferData, uint32_t uniformBufferSize) {
-    obj.model->draw(commandBuffer);
+  uboBuffers[xeRenderer.getFrameIndex()]->writeToBuffer(uniformBufferData);
+  uboBuffers[xeRenderer.getFrameIndex()]->flush();
+}
+
+void XeRenderSystem::render(XeGameObject &gameObject) {
+  if(!boundPipeline){
+    xeRenderer.beginSwapChainRenderPass(xeRenderer.getCurrentCommandBuffer());
+    xePipeline->bind(xeRenderer.getCurrentCommandBuffer());
+    boundPipeline = true;
   }
 
+  gameObject.model->bind(xeRenderer.getCurrentCommandBuffer());
+  gameObject.model->draw(xeRenderer.getCurrentCommandBuffer());
+
+}
+
+void XeRenderSystem::stop() {
+  boundPipeline = false;
+  boundDescriptor = false;
+  xeRenderer.endSwapChainRenderPass(xeRenderer.getCurrentCommandBuffer());
 }
 
 }

engine/xe_render_system.hpp

@@ -3,10 +3,10 @@
 #include <vulkan/vulkan.h>
 #include "xe_device.hpp"
 #include "xe_pipeline.hpp"
-#include "xe_frame_info.hpp"
 #include "xe_game_object.hpp"
 #include "xe_descriptors.hpp"
 #include "xe_renderer.hpp"
+#include "xe_engine.hpp"
 
 #include <memory>
 
@@ -14,42 +14,36 @@ namespace xe {
 
 class XeRenderSystem {
   public:
-
+  
-    struct XeData{};
-    
     XeRenderSystem(
-      XeDevice &device, 
+      XeEngine &xeEngine,
-      XeRenderer &renderer, 
-      XeDescriptorPool &xeDescriptorPool, 
-      XeDescriptorSetLayout &xeDescriptorSetLayout,
       std::string vert,
       std::string frag, 
       uint32_t pushCunstantDataSize,
       uint32_t uniformBufferDataSize
-      );
+    );
 
     ~XeRenderSystem();
 
     XeRenderSystem(const XeRenderSystem &) = delete;
     XeRenderSystem operator=(const XeRenderSystem &) = delete;
 
-    void setUnifroms(XeFrameInfo & frameInfo);
+    void loadPushConstant(void *pushConstantData, uint32_t pushConstantSize);
-
+    void loadUniformObject(void *uniformBufferData, uint32_t uniformBufferSize);
-    void renderGameObjects(
+    void render(XeGameObject &gameObject);
-      int frameIndex, 
+    void stop();
-      VkCommandBuffer commandBuffer, 
-      std::vector<XeGameObject> &gameObjects, 
-      void *pushConstantData, 
-      uint32_t pushConstantSize, 
-      void* uniformBufferData, 
-      uint32_t uniformBufferSize);
 
   private:
+  
     void createUniformBuffers(XeDescriptorPool &xeDescriptorPool, XeDescriptorSetLayout &xeDescriptorSetLayout, uint32_t uniformBufferDataSize);
     void createPipelineLayout(XeDescriptorSetLayout &xeDescriptorSetLayout, uint32_t pushCunstantDataSize, uint32_t uniformBufferDataSize);
     void createPipeline(VkRenderPass renderPass, std::string vert, std::string frag);
 
+    bool boundPipeline{false};
+    bool boundDescriptor{false};
+
     XeDevice& xeDevice;
+    XeRenderer& xeRenderer;
 
     std::unique_ptr<XePipeline> xePipeline;
     std::vector<std::unique_ptr<XeBuffer>> uboBuffers;

res/shaders/simple_shader.vert

@@ -26,5 +26,5 @@ void main() {
 
   float lightIntensity = AMBIENT + max(dot(normalWorldSpace, ubo.directionToLight), 0);
 
-  fragColor = lightIntensity * color;
+  fragColor = lightIntensity * vec3(1/position.y,position.y,clamp(sin(position.x - position.z), 0, 1));
 }

src/first_app.cpp

@@ -1,32 +1,20 @@
 #include "first_app.hpp"
 
 #include "xe_camera.hpp"
+#include "xe_engine.hpp"
 #include "xe_game_object.hpp"
 #include "xe_model.hpp"
+#include "xe_render_system.hpp"
 #include "keyboard_movement_controller.hpp"
-
+#include "simple_renderer.hpp"
 
 #define GLM_FORCE_RADIANS
 #define GLM_FORCE_DEPTH_ZERO_TO_ONE
 #include <glm/glm.hpp>
 #include <glm/gtc/constants.hpp>
-
 #include <array>
-#include <chrono> 
-#include <cassert>
-#include <stdexcept>
-#include <iostream>
-namespace xe {
 
-struct UniformBuffer {
+namespace app {
-  alignas(16) glm::mat4 projectionView{1.f};
-  alignas(4) glm::vec3 lightDirection = glm::normalize(glm::vec3{-1.f, 3.f, 1.f});
-};
-
-struct PushConstant {
-  alignas(16) glm::mat4 modelMatrix{1.f};
-  alignas(16) glm::mat4 normalMatrix{1.f};
-};
 
 FirstApp::FirstApp() : xeEngine{WIDTH, HEIGHT, "Hello, Vulkan!"} {
   loadGameObjects();
@@ -36,53 +24,23 @@ FirstApp::~FirstApp() {}
 
 void FirstApp::run() {
 
-  std::unique_ptr<XeRenderSystem> simpleRenderSystem = xeEngine.createRenderSystem(
+  SimpleRenderer renderer{xeEngine};
-    "res/shaders/simple_shader.vert.spv",
+    
-    "res/shaders/simple_shader.frag.spv", 
+  xeEngine.getCamera().setViewTarget(glm::vec3(-1.f, -2.f, 20.f), glm::vec3(0.f, 0.f, 2.5f));
-    sizeof(PushConstant), 
-    sizeof(UniformBuffer));
 
-  XeCamera camera{};
+  auto viewerObject = xe::XeGameObject::createGameObject();
-  camera.setViewTarget(glm::vec3(-1.f, -2.f, 20.f), glm::vec3(0.f, 0.f, 2.5f));
-
-  auto viewerObject = XeGameObject::createGameObject();
   KeyboardMovementController cameraController{};
 
-  auto currentTime = std::chrono::high_resolution_clock::now();
+  while (xeEngine.poll()) {
 
-  while (!xeEngine.getWindow().shouldClose()) {
+    float frameTime = xeEngine.getFrameTime();
-    glfwPollEvents();
-
-    auto newTime = std::chrono::high_resolution_clock::now();
-    float frameTime = std::chrono::duration<float, std::chrono::seconds::period>(newTime - currentTime).count();
-    currentTime = newTime;
 
     cameraController.moveInPlaneXZ(xeEngine.getWindow().getGLFWwindow(), frameTime, viewerObject);
-    camera.setViewYXZ(viewerObject.transform.translation, viewerObject.transform.rotation);
+    xeEngine.getCamera().setViewYXZ(viewerObject.transform.translation, viewerObject.transform.rotation);
-
-    float aspect = xeEngine.getRenderer().getAspectRatio();
-    camera.setPerspectiveProjection(glm::radians(50.f), aspect, 0.1f, 100.f);
 
     if(xeEngine.beginFrame()) {
-
+      renderer.render(gameObjects, xeEngine.getCamera());
-      PushConstant pc{};
-      pc.modelMatrix = gameObjects[0].transform.mat4();
-      pc.normalMatrix = gameObjects[0].transform.normalMatrix();
-
-      UniformBuffer ubo{};
-      ubo.projectionView = camera.getProjection() * camera.getView();
-      
-      xeEngine.render(
-        *simpleRenderSystem,
-        gameObjects,
-        &pc,
-        sizeof(pc),
-        &ubo,
-        sizeof(ubo)
-      );
-
       xeEngine.endFrame();
-
     }
   }
 
@@ -91,13 +49,20 @@ void FirstApp::run() {
 }
 
 void FirstApp::loadGameObjects() {
-  std::shared_ptr<XeModel> xeModel = xeEngine.createModel("res/models/stanford-dragon.obj");
+  std::shared_ptr<xe::XeModel> xeModel = xeEngine.loadModelFromFile("res/models/stanford-dragon.obj");
 
-  auto cube = XeGameObject::createGameObject();
+  auto dragon = xe::XeGameObject::createGameObject();
-  cube.model = xeModel;
+  dragon.model = xeModel;
-  cube.transform.translation = {.0f, .0f, 2.5f};
+  dragon.transform.translation = {.0f, .0f, 2.5f};
-  cube.transform.scale = {.5f, .5f, .5f};
+  dragon.transform.scale = {.5f, .5f, .5f};
-  gameObjects.push_back(std::move(cube));
+  gameObjects.push_back(std::move(dragon));
+
+  auto dragon2 = xe::XeGameObject::createGameObject();
+  dragon2.model = xeModel;
+  dragon2.transform.translation = {5.0f, .0f, -1.5f};
+  dragon2.transform.rotation.y = glm::radians(90.f);
+  dragon2.transform.scale = {.35f, .35f, .35f};
+  gameObjects.push_back(std::move(dragon2));
 }
 
 }

src/first_app.hpp

@@ -7,11 +7,9 @@
 #include <memory>
 #include <vector>
 
-namespace xe {
+namespace app {
 class FirstApp {
   public:
-    static constexpr int WIDTH = 800;
-    static constexpr int HEIGHT = 600;
 
     FirstApp();
     ~FirstApp();
@@ -22,10 +20,14 @@ class FirstApp {
     void run();
 
   private:
+  
+    static constexpr int WIDTH = 800;
+    static constexpr int HEIGHT = 600;
+
     void loadGameObjects();
 
-    XeEngine xeEngine;
+    xe::XeEngine xeEngine;
 
-    std::vector<XeGameObject> gameObjects;
+    std::vector<xe::XeGameObject> gameObjects;
 };
 }

src/keyboard_movement_controller.cpp

@@ -4,9 +4,9 @@
 #include <glm/geometric.hpp>
 #include <limits>
 
-namespace xe {
+namespace app {
 
-void KeyboardMovementController::moveInPlaneXZ(GLFWwindow* window, float dt, XeGameObject& gameObject) {
+void KeyboardMovementController::moveInPlaneXZ(GLFWwindow* window, float dt, xe::XeGameObject& gameObject) {
   glm::vec3 rotate{0};
   if(glfwGetKey(window, keys.lookRight) == GLFW_PRESS) rotate.y += 1.f;
   if(glfwGetKey(window, keys.lookLeft) == GLFW_PRESS) rotate.y -= 1.f;

src/keyboard_movement_controller.hpp

@@ -4,7 +4,7 @@
 #include "xe_window.hpp"
 #include <GLFW/glfw3.h>
 
-namespace xe {
+namespace app {
   class KeyboardMovementController {
 
     public:
@@ -21,7 +21,7 @@ namespace xe {
         int lookDown = GLFW_KEY_DOWN;
       };
 
-      void moveInPlaneXZ(GLFWwindow* window, float dt, XeGameObject& gameObject);
+      void moveInPlaneXZ(GLFWwindow* window, float dt, xe::XeGameObject& gameObject);
 
       KeyMappings keys{};
       float moveSpeed{3.f};

src/main.cpp

@@ -5,7 +5,7 @@
 #include <stdexcept>
 
 int main() {
-    xe::FirstApp app{};
+    app::FirstApp app{};
 
     try {
         app.run();

src/simple_renderer.cpp

@@ -0,0 +1,26 @@
+#include "simple_renderer.hpp"
+
+namespace app {
+
+SimpleRenderer::SimpleRenderer(xe::XeEngine &xeEngine) 
+  : xeRenderSystem{xeEngine, "res/shaders/simple_shader.vert.spv", "res/shaders/simple_shader.frag.spv", sizeof(PushConstant), sizeof(UniformBuffer)} {};
+
+void SimpleRenderer::render(std::vector<xe::XeGameObject> &gameObjects, xe::XeCamera &xeCamera) {
+
+  UniformBuffer ubo{};
+  ubo.projectionView = xeCamera.getProjection() * xeCamera.getView();
+  xeRenderSystem.loadUniformObject(&ubo, sizeof(ubo));
+
+  for(auto &obj : gameObjects) {
+    PushConstant pc{};
+    pc.modelMatrix = obj.transform.mat4();
+    pc.normalMatrix = obj.transform.normalMatrix();
+    xeRenderSystem.loadPushConstant(&pc, sizeof(pc));
+    xeRenderSystem.render(obj);
+  }
+
+  xeRenderSystem.stop();
+
+}
+
+}

src/simple_renderer.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "xe_render_system.hpp"
+#include <string>
+
+namespace app {
+
+struct UniformBuffer {
+  alignas(16) glm::mat4 projectionView{1.f};
+  alignas(4) glm::vec3 lightDirection = glm::normalize(glm::vec3{-1.f, 3.f, 1.f});
+};
+
+struct PushConstant {
+  alignas(16) glm::mat4 modelMatrix{1.f};
+  alignas(16) glm::mat4 normalMatrix{1.f};
+};
+
+class SimpleRenderer {
+
+  public:
+
+    SimpleRenderer(xe::XeEngine &xeEngine);
+
+    ~SimpleRenderer() {};
+
+    SimpleRenderer(const SimpleRenderer&) = delete;
+    SimpleRenderer operator=(const SimpleRenderer&) = delete;
+
+    void render(std::vector<xe::XeGameObject> &gameObjects, xe::XeCamera &xeCamera);
+
+  private:
+    xe::XeRenderSystem xeRenderSystem;
+
+};
+
+}