theta = atan2((x_rand(2) - x_near(2)),(x_rand(1) - x_near(1))); x_new(1) = x_near(1) + cos(theta) * Delta; x_new(2) = x_near(2) + sin(theta) * Delta;

这是一个用于计算机器人运动规划的代码段。其中x_rand和x_near是二维笛卡尔坐标系中的点，theta是两点之间的夹角，delta是机器人每次移动的距离。代码首先通过计算x_rand和x_near之间的夹角theta，确定机器人应该向哪个方向移动。然后，通过cos(theta)和sin(theta)计算x_new的坐标值，使机器人向目标点移动一个固定的距离Delta。最终，x_new将成为机器人移动后的新位置。

相关问题

给下列程序添加注释： void DWAPlannerROS::reconfigureCB(DWAPlannerConfig &config, uint32_t level) { if (setup_ && config.restore_defaults) { config = default_config_; config.restore_defaults = false; } if ( ! setup_) { default_config_ = config; setup_ = true; } // update generic local planner params base_local_planner::LocalPlannerLimits limits; limits.max_vel_trans = config.max_vel_trans; limits.min_vel_trans = config.min_vel_trans; limits.max_vel_x = config.max_vel_x; limits.min_vel_x = config.min_vel_x; limits.max_vel_y = config.max_vel_y; limits.min_vel_y = config.min_vel_y; limits.max_vel_theta = config.max_vel_theta; limits.min_vel_theta = config.min_vel_theta; limits.acc_lim_x = config.acc_lim_x; limits.acc_lim_y = config.acc_lim_y; limits.acc_lim_theta = config.acc_lim_theta; limits.acc_lim_trans = config.acc_lim_trans; limits.xy_goal_tolerance = config.xy_goal_tolerance; limits.yaw_goal_tolerance = config.yaw_goal_tolerance; limits.prune_plan = config.prune_plan; limits.trans_stopped_vel = config.trans_stopped_vel; limits.theta_stopped_vel = config.theta_stopped_vel; planner_util_.reconfigureCB(limits, config.restore_defaults); // update dwa specific configuration dp_->reconfigure(config); }

/**
* @brief Callback function for dynamic reconfiguration of DWA planner parameters
*
* @param config Reference to the configuration object that stores the updated parameters
* @param level The level of reconfiguration, unused in this function
*/
void DWAPlannerROS::reconfigureCB(DWAPlannerConfig &config, uint32_t level) {

// If the setup has been completed and restore_defaults flag is set, restore default configuration
if (setup_ && config.restore_defaults) {
config = default_config_;
config.restore_defaults = false;
}

// If setup has not been completed, store default configuration and set the setup flag to true
if ( ! setup_) {
default_config_ = config;
setup_ = true;
}

// Update generic local planner parameters
base_local_planner::LocalPlannerLimits limits;
limits.max_vel_trans = config.max_vel_trans;
limits.min_vel_trans = config.min_vel_trans;
limits.max_vel_x = config.max_vel_x;
limits.min_vel_x = config.min_vel_x;
limits.max_vel_y = config.max_vel_y;
limits.min_vel_y = config.min_vel_y;
limits.max_vel_theta = config.max_vel_theta;
limits.min_vel_theta = config.min_vel_theta;
limits.acc_lim_x = config.acc_lim_x;
limits.acc_lim_y = config.acc_lim_y;
limits.acc_lim_theta = config.acc_lim_theta;
limits.acc_lim_trans = config.acc_lim_trans;
limits.xy_goal_tolerance = config.xy_goal_tolerance;
limits.yaw_goal_tolerance = config.yaw_goal_tolerance;
limits.prune_plan = config.prune_plan;
limits.trans_stopped_vel = config.trans_stopped_vel;
limits.theta_stopped_vel = config.theta_stopped_vel;

// Call reconfigureCB function of the planner_util_ object with updated limits and restore_defaults flag
planner_util_.reconfigureCB(limits, config.restore_defaults);

// Call reconfigure function of the dp_ object with updated configuration
dp_->reconfigure(config);
}

for event_ in pygame.event.get(): # 退出事件 if event_.type == pygame.QUIT: done = True if event_.type == pygame.JOYAXISMOTION: xxx=joystick.get_axis(0) yyy=-joystick.get_axis(1) if 0.5>xxx and xxx>-0.5: if 0.5>yyy and yyy>-0.5: yyy=0 xxx=0 if xxx==0: theta=0 if xxx!=0: if yyy==0: theta=90 if yyy!=0: theta=(math.atan(xxx/yyy))*57.3 for i in range(10): all_theta=theta+all_theta theta_out=all_theta/10 all_theta=0 改错

这段代码有几个错误，我来一一指出并给出正确的代码：

1. 缺少 pygame.init() 来初始化 Pygame 库，并设置窗口参数。正确的代码应该是：

pygame.init()
size = (700, 500)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("My Game")
done = False

2. 在事件监听的代码中，缩进不正确。需要将后续的代码都缩进到 if 语句的下一行。正确的代码应该是：

for event_ in pygame.event.get():
    if event_.type == pygame.QUIT:
        done = True
    if event_.type == pygame.JOYAXISMOTION:
        xxx = joystick.get_axis(0)
        yyy = -joystick.get_axis(1)
        if 0.5 > xxx and xxx > -0.5:
            if 0.5 > yyy and yyy > -0.5:
                yyy = 0
                xxx = 0
        if xxx == 0:
            theta = 0
        if xxx != 0:
            if yyy == 0:
                theta = 90
            if yyy != 0:
                theta = (math.atan(xxx / yyy)) * 57.3
for i in range(10):
    all_theta = theta + all_theta
theta_out = all_theta / 10
all_theta = 0

3. 在计算平均角度的代码中，缺少对 all_theta 变量的声明和初始化。需要在程序开头添加 all_theta = 0。正确的代码应该是：

all_theta = 0
for i in range(10):
    all_theta += theta
theta_out = all_theta / 10