如何使用 GLFW 在 openGL 中旋转相机?

How to rotate camera in openGL using GLFW?

我正在使用 GLFW 在 C++ 中创建一个 OpenGL 应用程序。基于 this 教程,我设法创建了像相机一样的 FPS(WASD 移动 + 鼠标移动的俯仰偏航)。

我正在使用相机鼠标移动

glfwSetCursorPosCallback(window, mouse_callback);
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; 
    lastX = xpos;
    lastY = ypos;

    float sensitivity = 0.1f;
    xoffset *= sensitivity;
    yoffset *= sensitivity;

    yaw += xoffset;
    pitch += yoffset;

    if (pitch > 89.0f)
        pitch = 89.0f;
    if (pitch < -89.0f)
        pitch = -89.0f;

    glm::vec3 front;
    front.x = cos(glm::radians(yaw)) * cos(glm::radians(pitch));
    front.y = sin(glm::radians(pitch));
    front.z = sin(glm::radians(yaw)) * cos(glm::radians(pitch));
    cameraFront = glm::normalize(front);
}

这工作正常,但问题是我的应用程序 window 不是全屏,所以如果我想旋转我的鼠标光标离开 window 然后很难控制相机.

是否可以执行与 glfwSetCursorPosCallback 相同的操作,但前提是按下左键单击?我想让相机做和现在一样的事情,但前提是我按下左键。

Is it possible to do the same thing as glfwSetCursorPosCallback, but only if left click is pressed? I want the camera do the same thing as its doing now, but only if i pressed left click.

glfwSetMouseButtonCallback 设置一个回调,在按下鼠标按钮时通知。
当前鼠标(光标)位置可以通过glfwGetCursorPos.

获取

添加鼠标按钮回调:

glfwSetMouseButtonCallback(window, mouse_button_callback);

并在回调中获取鼠标位置:

void mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
{
    if (button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_PRESS)
    {
        double xpos, ypos;     
        glfwGetCursorPos(window, &xpos, &ypos); 

        // [...]
    }
}