Question

我目前正在将在Windows / Mac中开发的opengl代码移至Ubuntu。我不知道我的Ubuntu是否性能真的很慢，或者我的代码是否错误。打开渲染窗口后，摄像头系统应读取鼠标的移动并更改摄像头的偏航/俯仰/前叉，但它仅读取键盘输入，而不读取鼠标的移动。我只能用键盘在相机周围移动。

这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);
    ....
}

这是我发送给mouse_callback()的{{1}}函数

glfwSetCursorPosCallback()

是我的慢Ubuntu问题还是代码问题？该代码甚至可以在Mac上运行，Mac被认为与Linux非常相似。我目前正在使用glfw3库。

这是与输入键盘处理有关的代码，效果非常好。（以防万一）

在我的渲染循环中

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);
}

我的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(); }函数

processInput()

编辑

我在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); }函数中尝试过std::cout << "callback called" <<std::endl。它被调用，但是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

为什么在Linux开发的openGL程序中没有捕获鼠标移动？

0 个答案: