无人机仿真XTDrone学习五：XTDrone键盘控制无人机indoor1.launch程序分析二_iris 无人机模型

launch程序如下

这个文件启动了Gazebo仿真环境，配置MAVROS功能包和PX4 SITL功能包。

<?xml version="1.0"?>
<launch>
    <!-- MAVROS posix SITL environment launch script -->
    <!-- launches Gazebo environment and 2x: MAVROS, PX4 SITL, and spawns vehicle -->
    <!-- vehicle model and world -->
    <arg name="est" default="ekf2"/>
    <arg name="world" default="$(find mavlink_sitl_gazebo)/worlds/indoor1.world"/>
    <!-- gazebo configs -->
    <arg name="gui" default="true"/>
    <arg name="debug" default="false"/>
    <arg name="verbose" default="false"/>
    <arg name="paused" default="false"/>
    <!-- Gazebo sim -->
    <include file="$(find gazebo_ros)/launch/empty_world.launch">
        <arg name="gui" value="$(arg gui)"/>
        <arg name="world_name" value="$(arg world)"/>
        <arg name="debug" value="$(arg debug)"/>
        <arg name="verbose" value="$(arg verbose)"/>
        <arg name="paused" value="$(arg paused)"/>
    </include>
     <!-- iris_0 -->
     <group ns="iris_0">
        <!-- MAVROS and vehicle configs -->
            <arg name="ID" value="0"/>
            <arg name="ID_in_group" value="0"/>
            <arg name="fcu_url" default="udp://:24540@localhost:34580"/>
        <!-- PX4 SITL and vehicle spawn -->
        <include file="$(find px4)/launch/single_vehicle_spawn_xtd.launch">
            <arg name="x" value="0"/>
            <arg name="y" default="7.5"/>
            <arg name="z" default="1"/>
            <arg name="R" value="0"/>
            <arg name="P" value="0"/>
            <arg name="Y" value="0"/>
            <arg name="vehicle" value="iris"/>
            <arg name="sdf" value="iris_stereo_camera"/>
            <arg name="mavlink_udp_port" value="18570"/>
            <arg name="mavlink_tcp_port" value="4560"/>
            <arg name="ID" value="$(arg ID)"/>
            <arg name="ID_in_group" value="$(arg ID_in_group)"/>
        </include>
        <!-- MAVROS -->
        <include file="$(find mavros)/launch/px4.launch">
            <arg name="fcu_url" value="$(arg fcu_url)"/>
            <arg name="gcs_url" value=""/>
            <arg name="tgt_system" value="$(eval 1 + arg('ID'))"/>
            <arg name="tgt_component" value="1"/>
        </include>
    </group>
</launch>
<!--the launch file is generated by XTDrone multi-vehicle generator.py  -->
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配置并启动Gazebo仿真环境

程序中添加了注释，不要复制运行此处代码。

<!-- vehicle model and world -->
    <arg name="est" default="ekf2"/>
    <arg name="world" default="$(find mavlink_sitl_gazebo)/worlds/indoor1.world"/>可在此处修改仿真环境地图
    <!-- gazebo configs -->
    <arg name="gui" default="true"/>定义变量
    <arg name="debug" default="false"/>
    <arg name="verbose" default="false"/>
    <arg name="paused" default="false"/>
    <!-- Gazebo sim -->
    <include file="$(find gazebo_ros)/launch/empty_world.launch">嵌套的另一个launch文件，打开为一个空地图仿真环境
        <arg name="gui" value="$(arg gui)"/>这里是对configs已经定义的变量进行调用
        <arg name="world_name" value="$(arg world)"/>
        <arg name="debug" value="$(arg debug)"/>
        <arg name="verbose" value="$(arg verbose)"/>
        <arg name="paused" value="$(arg paused)"/>
    </include>
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无人机模型配置和启动PX4 SITL

<!-- iris_0 -->
     <group ns="iris_0">
        <!-- MAVROS and vehicle configs -->
            <arg name="ID" value="0"/>
            <arg name="ID_in_group" value="0"/>
            <arg name="fcu_url" default="udp://:24540@localhost:34580"/>
        <!-- PX4 SITL and vehicle spawn -->
        <include file="$(find px4)/launch/single_vehicle_spawn_xtd.launch">嵌入的launch文件启动	PX4 SITL
            <arg name="x" value="0"/>
            <arg name="y" default="7.5"/>
            <arg name="z" default="1"/>
            <arg name="R" value="0"/>roll
            <arg name="P" value="0"/>pitch
            <arg name="Y" value="0"/>yaw
            <arg name="vehicle" value="iris"/>
            <arg name="sdf" value="iris_stereo_camera"/>无人机模型在此修改
            <arg name="mavlink_udp_port" value="18570"/>
            <arg name="mavlink_tcp_port" value="4560"/>
            <arg name="ID" value="$(arg ID)"/>
            <arg name="ID_in_group" value="$(arg ID_in_group)"/>
        </include>
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配置MAVROS功能包

<!-- MAVROS -->基本不需要修改
        <include file="$(find mavros)/launch/px4.launch">
            <arg name="fcu_url" value="$(arg fcu_url)"/>
            <arg name="gcs_url" value=""/>
            <arg name="tgt_system" value="$(eval 1 + arg('ID'))"/>
            <arg name="tgt_component" value="1"/>
        </include>
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