Question

我正在关注TheCherno游戏引擎系列，我尝试为DirectX和Win32实现他的代码（他使用glfw和openGL），但是由于某种原因，我的代码除了Windows窗口外没有显示任何内容。我尝试检查过针对win32和DirectX的imGui的其他教师实现，但仍然没有任何UI。有人可以向我解释因为没有编译错误而我在做什么错？您认为实现imGui的最佳快速方法是什么？

#include "pch.h"
#include "ImGuiLayer.h"

#include "imgui.h"
#include "Platform/DirectX11/imgui_impl_dx11.h"
#include "Platform/Windows/imgui_impl_win32.h"
#include "DirectX11.h"
#include "Engine/App.h"

Engine::ImGuiLayer::ImGuiLayer()
    :
    Layer("ImGuiLayer")
{
}

Engine::ImGuiLayer::~ImGuiLayer()
{
}

void Engine::ImGuiLayer::OnAttach()
{
    IMGUI_CHECKVERSION();
    ImGui::StyleColorsDark();

    ImGuiIO& io = ImGui::GetIO();
    io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;
    io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos ;

    io.KeyMap[ImGuiKey_Tab] = VK_TAB;
    io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
    io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
    io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
    io.KeyMap[ImGuiKey_DownArrow] = VK_DOWN;
    io.KeyMap[ImGuiKey_PageUp] = VK_PRIOR;
    io.KeyMap[ImGuiKey_PageDown] = VK_NEXT;
    io.KeyMap[ImGuiKey_Home] = VK_HOME;
    io.KeyMap[ImGuiKey_End] = VK_END;
    io.KeyMap[ImGuiKey_Insert] = VK_INSERT;
    io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
    io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
    io.KeyMap[ImGuiKey_Space] = VK_SPACE;
    io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
    io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
    io.KeyMap[ImGuiKey_KeyPadEnter] = VK_RETURN;
    io.KeyMap[ImGuiKey_A] = 'A';
    io.KeyMap[ImGuiKey_C] = 'C';
    io.KeyMap[ImGuiKey_V] = 'V';
    io.KeyMap[ImGuiKey_X] = 'X';
    io.KeyMap[ImGuiKey_Y] = 'Y';
    io.KeyMap[ImGuiKey_Z] = 'Z';

    //ENG_ASSERT(ImGui_ImplDX11_Init(DirectX11::Graphics::Get_Device(), DirectX11::Graphics::Get_Context()), "Failed to initialize directX11 ImGui");
    ImGui_ImplDX11_Init(DirectX11::Graphics::Get_Device(), DirectX11::Graphics::Get_Context()), "Failed to initialize directX11 ImGui";
}

void Engine::ImGuiLayer::OnDetach()
{
}

void Engine::ImGuiLayer::OnUpdate()
{
    ImGuiIO& io = ImGui::GetIO();
    App& app = App::Get();
    io.DisplaySize = ImVec2(app.GetWindow().GetWidth(), app.GetWindow().GetHeight());

    float time = (float)DirectX11::Get_Time();
    io.DeltaTime = m_Time > 0.0f ? (time - m_Time) : (1.0f / 60.0f);
    m_Time = time;

    ImGui_ImplDX11_NewFrame();
    ImGui_ImplWin32_NewFrame();
    ImGui::NewFrame();

    static bool show = true;
    ImGui::ShowDemoWindow(&show);

    ImGui::Render();
    ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
}

void Engine::ImGuiLayer::OnEvent(Event& event)
{
}

还有我的窗口

#include "pch.h"
#include "WindowsWindow.h"

#include "imgui.h"
#include "imgui_impl_win32.h"

void Engine::WindowsWindow::Init(const WindowProps& props)
{
    m_Data.Title = props.Title;
    m_Data.Width = props.Width;
    m_Data.Height = props.Height;

    // calculate window size based on desired client region size
    RECT wr;
    wr.left = 100;
    wr.right = m_Data.Width + wr.left;
    wr.top = 100;
    wr.bottom = m_Data.Height + wr.top;
    AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE);

    //String to LPCWSTR
    std::string s = m_Data.Title;
    int wchars_num = MultiByteToWideChar(CP_UTF8, 0, s.c_str(), -1, NULL, 0);
    wchar_t* wstr = new wchar_t[wchars_num];
    MultiByteToWideChar(CP_UTF8, 0, s.c_str(), -1, wstr, wchars_num);
    LPCWSTR tempTitle = std::wstring(m_Data.Title.begin(), m_Data.Title.end()).c_str();

    hWnd = CreateWindow(wc.name, wstr, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, wr.right - wr.left, wr.bottom - wr.top, nullptr, nullptr, wc.hInst, this);
    delete wstr;
    ENG_CORE_ASSERT(hWnd, "Window creation");

    ShowWindow(hWnd, SW_SHOWDEFAULT);

    ImGui::CreateContext();
    ImGui_ImplWin32_Init(hWnd);

    DirectX11::Graphics::Init(hWnd);
}

显示ImGui演示窗口（带有hack实现）的最佳方法是什么？

0 个答案: