Method displayFunc

tutorials/common/tutorial/tutorial.cpp:881–985

  }

  void TutorialApplication::displayFunc()
  {
    double t0 = getSeconds();
    const float time = g_motion_blur ? float(t0-time0) : (animate ? 0.5 * sinf(fabsf(float(t0-time0))) + 0.5 : render_time);
    
    /* update camera */
    camera.move(moveDelta.x*speed, moveDelta.y*speed, moveDelta.z*speed);

    /* update animated camera */
    if (animated_camera)
      camera = Camera(animated_camera->get(time),camera.handedness);
    
    ISPCCamera ispccamera = camera.getISPCCamera(width,height);
     if (print_camera)
      std::cout << camera.str() << std::endl;

    /* render image using ISPC */
    initRayStats();
    render(pixels,width,height,time,ispccamera);
    double dt0 = getSeconds()-t0;
    if (ispccamera.render_time != 0.0) dt0 = ispccamera.render_time;
    avg_render_time.add(dt0);
    double mrayps = double(getNumRays())/(1000000.0*dt0);
    avg_mrayps.add(mrayps);

    /* draw pixels to screen */
    glRasterPos2i(-1,1);
    glPixelZoom(1.0f,-1.0f);
    glDrawPixels(width,height,GL_RGBA,GL_UNSIGNED_BYTE,pixels);

    // Start the Dear ImGui frame
    ImGui_ImplOpenGL2_NewFrame();
    ImGui_ImplGlfw_NewFrame();
    ImGui::NewFrame();
    
    ImGuiWindowFlags window_flags = 0;
    window_flags |= ImGuiWindowFlags_NoTitleBar;
    //window_flags |= ImGuiWindowFlags_NoScrollbar;
    //window_flags |= ImGuiWindowFlags_MenuBar;
    //window_flags |= ImGuiWindowFlags_NoMove;
    //window_flags |= ImGuiWindowFlags_NoResize;
    //window_flags |= ImGuiWindowFlags_NoCollapse;
    //window_flags |= ImGuiWindowFlags_NoNav;

    //ImGui::GetStyle().WindowBorderSize = 0.0f;
    //ImGui::SetNextWindowPos(ImVec2(width-200,0));
    //ImGui::SetNextWindowSize(ImVec2(200,height));
    ImGui::SetNextWindowBgAlpha(0.3f);
    ImGui::Begin("Embree", nullptr, window_flags);
    drawGUI();
    
    double render_dt = avg_render_time.get();
    double render_fps = render_dt != 0.0 ? 1.0f/render_dt : 0.0;
    ImGui::Text("Render: %3.2f fps",render_fps);

    double total_dt = avg_frame_time.get();
    double total_fps = total_dt != 0.0 ? 1.0f/total_dt : 0.0;
    ImGui::Text("Total: %3.2f fps",total_fps);