linux - 为什么在Linux开发的openGL程序中没有捕捉到鼠标移动？

Question

我目前正在将我在 Windows/Mac 中开发的 opengl 代码移动到 Ubuntu。我不知道我的 Ubuntu 性能是否真的很慢，或者我的代码是否错误。当渲染窗口打开时，相机系统应该读取鼠标移动并改变相机的偏航/俯仰/前叉，但它只读取键盘输入，而不是鼠标移动。我只能用键盘在相机周围移动。

以下是有关鼠标回调的基本代码。

int main()
{
    // glfw: initialize and configure
    // ------------------------------
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

#ifdef __APPLE__
    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // uncomment this statement to fix compilation on OS X
#endif

                                                         // glfw window creation
                                                         // --------------------
    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", glfwGetPrimaryMonitor(), NULL);

    if (window == NULL)
    {
        std::cout << "Failed to create GLFW window" << std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
    glfwSetCursorPosCallback(window, mouse_callback);
    glfwSetScrollCallback(window, scroll_callback);

    // tell GLFW to capture our mouse
    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
    ....
}

这是mouse_callback()我发送到的功能glfwSetCursorPosCallback()

void mouse_callback(GLFWwindow* window, double xpos, double ypos)
{
    if (firstMouse)
    {
        lastX = xpos;
        lastY = ypos;
        firstMouse = false;
    }

    float xoffset = xpos - lastX;
    float yoffset = lastY - ypos; // reversed since y-coordinates go from bottom to top

    lastX = xpos;
    lastY = ypos;

    camera.ProcessMouseMovement(xoffset, yoffset);
}

是我的 Ubuntu 慢问题还是代码问题？这段代码甚至可以在 Mac 上运行，Mac 被认为是与 Linux 非常相似的操作系统。我目前正在使用 glfw3 库。

---

这是与输入键盘处理相关的代码，效果非常好。（以防万一）

在我的渲染循环中

while (!glfwWindowShouldClose(window))
    {
        // per-frame time logic
        // --------------------
        VISITED = new unsigned int[11]{ 0,0,0,0,0,0,0,0,0,0,0 };
        float currentFrame = glfwGetTime();
        deltaTime = currentFrame - lastFrame;
        lastFrame = currentFrame;

        // input
        // -----
        processInput(window);

        //render
        .......
        glfwSwapBuffers(window);
        glfwPollEvents();
    } 

我的processInput()功能

void processInput(GLFWwindow *window)
{
    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
        glfwSetWindowShouldClose(window, true);

    if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
        camera.ProcessKeyboard(FORWARD, deltaTime);
    if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
        camera.ProcessKeyboard(BACKWARD, deltaTime);
    if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
        camera.ProcessKeyboard(LEFT, deltaTime);
    if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
        camera.ProcessKeyboard(RIGHT, deltaTime);
}

---

编辑

std::cout << "callback called" <<std::endl我在功能中尝试过mouse_callback()。它被调用，但在整个程序中最多只能调用 2 次。仅在程序启动时才调用一次或两次。也许这是 Ubuntu 中 glfw 的错误

标签： linuxopenglcallbackmouseglfw