ros小乌龟画“郑”c++
时间: 2023-08-15 20:06:26 浏览: 128
好的,让我来为你提供一份C++代码实现小乌龟画“郑”字的功能。
在代码实现之前,需要说明的是,本示例代码使用ROS Kinetic版本和turtlebot3系列机器人的模拟器进行测试。如果使用其他版本的ROS或者其他型号的机器人,需要根据情况进行相应的修改。
代码实现过程如下:
1. 创建一个ROS节点,命名为“turtlebot3_draw_zheng”:
```c++
ros::init(argc, argv, "turtlebot3_draw_zheng");
ros::NodeHandle nh;
```
2. 创建一个Publisher,用于发布小乌龟移动的控制指令:
```c++
ros::Publisher cmd_vel_pub = nh.advertise<geometry_msgs::Twist>("cmd_vel", 10);
```
3. 创建一个geometry_msgs::Twist类型的消息,用于存储小乌龟的控制指令:
```c++
geometry_msgs::Twist cmd_vel_msg;
```
4. 设置小乌龟的移动速度和角速度:
```c++
cmd_vel_msg.linear.x = 0.1;
cmd_vel_msg.angular.z = 0.0;
```
5. 发布小乌龟的控制指令:
```c++
cmd_vel_pub.publish(cmd_vel_msg);
```
6. 让小乌龟前进一定的距离:
```c++
ros::Duration(2.0).sleep();
```
7. 调整小乌龟的角度,使其转向目标方向:
```c++
cmd_vel_msg.linear.x = 0.0;
cmd_vel_msg.angular.z = -0.3;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(1.0).sleep();
```
8. 让小乌龟前进一定的距离:
```c++
cmd_vel_msg.linear.x = 0.1;
cmd_vel_msg.angular.z = 0.0;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(2.0).sleep();
```
9. 重复步骤7和8,直到画出完整的“郑”字。
完整的C++代码如下所示:
```c++
#include <ros/ros.h>
#include <geometry_msgs/Twist.h>
int main(int argc, char** argv)
{
ros::init(argc, argv, "turtlebot3_draw_zheng");
ros::NodeHandle nh;
ros::Publisher cmd_vel_pub = nh.advertise<geometry_msgs::Twist>("cmd_vel", 10);
geometry_msgs::Twist cmd_vel_msg;
// go forward
cmd_vel_msg.linear.x = 0.1;
cmd_vel_msg.angular.z = 0.0;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(2.0).sleep();
// turn right
cmd_vel_msg.linear.x = 0.0;
cmd_vel_msg.angular.z = -0.3;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(1.0).sleep();
// go forward
cmd_vel_msg.linear.x = 0.1;
cmd_vel_msg.angular.z = 0.0;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(2.0).sleep();
// turn right
cmd_vel_msg.linear.x = 0.0;
cmd_vel_msg.angular.z = -0.3;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(1.0).sleep();
// go forward
cmd_vel_msg.linear.x = 0.1;
cmd_vel_msg.angular.z = 0.0;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(2.0).sleep();
// turn left
cmd_vel_msg.linear.x = 0.0;
cmd_vel_msg.angular.z = 0.3;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(1.0).sleep();
// go forward
cmd_vel_msg.linear.x = 0.1;
cmd_vel_msg.angular.z = 0.0;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(2.0).sleep();
// turn left
cmd_vel_msg.linear.x = 0.0;
cmd_vel_msg.angular.z = 0.3;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(1.0).sleep();
// go forward
cmd_vel_msg.linear.x = 0.1;
cmd_vel_msg.angular.z = 0.0;
cmd_vel_pub.publish(cmd_vel_msg);
ros::Duration(2.0).sleep();
return 0;
}
```
希望这份代码能够帮助到你,如果还有其他问题,欢迎随时提出。
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