Question

所以我一直在学习opengl和3d游戏编程，所以我开始尝试制作相机课，并实现使用鼠标的移动和查看。

移动完美无瑕，但是用鼠标环顾四周并不能正常工作。

只有在偏航角为0°时才能正常查找，然后我才能向上看。但是当yaw <0或yaw> 0时，向上查找将不会笔直，而更像是）或（。

我还注意到，当偏航角不为0时，无论向下还是向上看，偏航力都为0。

我不明白为什么会发生这种情况，为什么俯仰仅在偏航为0时才能正确运行，而为什么在偏航为0时却不正确呢？

在学习完本教程后，真的没有错

处理鼠标移动和更新

void Camera::processMouseMovement(GLfloat xOffset, GLfloat yOffset)
{
    GLboolean constrainPitch = true;

    xOffset *= this->mouseSensitivity;
    yOffset *= this->mouseSensitivity;

    this->yaw += xOffset;
    this->pitch += yOffset;

    if(constrainPitch)
    {
        if(this->pitch > 90.0f)
        {
            this->pitch = 90.0f;
        }

        if(this->pitch < -90.0f)
        {
            this->pitch = -90.0f;
        }
    }

    this->updateCameraVectors();
}

这是我的更新功能

void Camera::updateCameraVectors()
{
    Vector3 front;
    Matrix4 mat4;
    front.x = cos((DEG2RAD * this->yaw) * cos(DEG2RAD * this->pitch));
    front.y = sin(DEG2RAD * this->pitch);
    front.z = sin((DEG2RAD * this->yaw) * cos(DEG2RAD * this->pitch));

    this->front = mat4.normalize(front);
    this->right = mat4.normalize(mat4.cross(this->front, this->worldUp));
    this->up = mat4.normalize(mat4.cross(this->right, this->front));

    std::cout << "yaw: " << yaw << std::endl;
    std::cout << "pitch: " << pitch << std::endl;
}

在main.cpp

Camera camera(Vector3(0.0f, 0.0f, 0.0f));
GLfloat lastX = width / 2.0f;
GLfloat lastY = height / 2.0f;

GLboolean key[1024];
GLboolean firstMouse = true;

GLfloat deltaTime = 0.0f;
GLfloat lastFrame = 0.0f;

使用glfw输入，在main.cpp中为aslo

    glfwSetKeyCallback(window, keyCallBack);
    glfwSetCursorPosCallback(window, mouseCallBack);

    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);

在主循环中

    GLfloat currentFrame = glfwGetTime();
    deltaTime = currentFrame - lastFrame;
    lastFrame = currentFrame;

    glfwPollEvents();
    doMovement();


    proj = proj.perspective(camera.getZoom(), float(700 / 600), 1.0f, 1000.0f);
    glUniformMatrix4fv(uniProj, 1, GL_FALSE, proj.get());

    view = camera.getViewMatrix();

鼠标回调函数

void mouseCallBack(GLFWwindow *window, GLdouble xPos, GLdouble yPos)
{
    if(firstMouse)
    {
        lastX = xPos;
        lastY = yPos;
        firstMouse = false;
    }

    GLfloat xOffset = lastX - xPos;
    GLfloat yOffset = yPos - lastY;

    lastX = xPos;
    lastY = yPos;

    std::cout << "mouse position x: " << xPos << std::endl;
    std::cout << "mouse position y: " << yPos << std::endl;

    camera.processMouseMovement(xOffset, yOffset);
}

谢谢：）

Answer 1

假设front是您的平均每日前进向量，我将这样计算：

front.x = cos(DEG2RAD * this->yaw) * sin(DEG2RAD * this->pitch);
front.y = sin(DEG2RAD * this->yaw);
front.z = cos(DEG2RAD * this->yaw) * cos(DEG2RAD * this->pitch);

我不太了解我的三角函数，以了解您的代码在做什么。

更新：我盯着你的代码了一会儿...看来，代码中括号的外部集是一个错误。我的代码与代码之间的唯一其他区别是我在计算forward.x时使用了sin，它将交换一个轴。

OpenGL，倾斜力偏航为0

1 个答案: