Question

我尝试实现FP相机背后的想法来移动玩家对象，所以我有4个向量位置，向右，向上和向前，我使用以下方法更新向量并填充矩阵以发送到着色器：< / p>

void Mesh::updateVectors() {
    glm::vec3 f;
    f.x = cos(glm::radians(this->yaw)) * cos(glm::radians(this->pitch));
    f.y = sin(glm::radians(this->pitch));
    f.z = sin(glm::radians(this->yaw)) * cos(glm::radians(this->pitch));
    this->front = glm::normalize(f);
    this->right = glm::normalize(glm::cross(this->front, this->worldUp));
    this->up = glm::normalize(glm::cross(this->right, this->front));
    matrix = glm::lookAt(this->position, this->position + this->front, this->up);
    glm::vec3 s(scale);
    matrix = glm::scale(matrix, s);
    for (GLuint i = 0; i < this->m_Entries.size(); i++) {
        this->m_Entries[i].setModelMatrix(matrix);
    }
}

以及接收位置和旋转的这些方法：

void Mesh::ProcessKeyboard(Move_Directions direction, GLfloat deltaTime) {
    std::cout << this->front.x <<  "  /  " << this->front.z << std::endl;
    GLfloat velocity = this->movementSpeed * deltaTime;
    if (direction == FORWARD)
    this->position += this->front * velocity;
    if (direction == BACKWARD)
        this->position -= this->front * velocity;
    updateVectors();
}

void Mesh::Turn(GLfloat y) {
    this->yaw += y;
    this->updateVectors();
}

对象可以正确旋转但始终沿着一个轴（1,0,0）移动，而不是沿前面（方向）向量移动。这种方法可以在相机上成功运行，可以向我指向的任何方向移动。

Answer 1

glm::vec3 front;
position.x = cos(glm::radians(this->yaw)) * cos(glm::radians(this->pitch));
position.y = sin(glm::radians(this->pitch));
position.z = sin(glm::radians(this->yaw)) * cos(glm::radians(this->pitch));
this->front = glm::normalize(front);

您正在规范默认构造的glm::vec3 front。这是未定义的行为。除了上面的代码，我没有看到你修改Mesh::front的其他地方。您没有在Mesh::turn()中触及它，更新Mesh::yaw似乎不会以任何方式影响Mesh::front。

OpenGL沿着方向向量移动玩家

1 个答案: