Updated the launch files.

Integrated the description launch into the spawn_sign launch.
Added a test launch.

launch/description.launch

-<!-- -->
-<launch>
-  <arg name="name"  default="stop"/>
-  <arg name="tag"   default="alvar0"/>
-  <arg name="type"  default="stop"/>
-  <arg name="model" default="sign"/>
-  <arg name="model_path"  default="$(find sign_description)/urdf/$(arg model).xacro"/>
-  <arg name="state_publisher" default="true"/>
-  <arg name="rviz"        default="false"/>
-
-  <param name="$(arg name)_description" 
-         command="$(find xacro)/xacro --inorder '$(arg model_path)' 
-                  name:=$(arg name)
-                  tag:=$(arg tag)
-                  type:=$(arg type)">
-  </param>
-
-  <node name="$(arg name)_state_publisher"
-        pkg ="robot_state_publisher"
-        type="robot_state_publisher"
-        if="$(arg state_publisher)">
-    <!--<param name="tf_prefix" value="/$(arg name)" type="str" />-->
-    <remap from="robot_description" to="$(arg name)_description" />
-    <remap from="/joint_states" to="/$(arg name)/joint_states" />
-  </node>
-        
-  <node name="$(arg name)_rviz" pkg="rviz" type="rviz"
-        if="$(arg rviz)"
-        args="-d $(find sign_description)/rviz/$(arg name).rviz"/>
-
-</launch>
\ No newline at end of file

launch/spawn.launch → launch/spawn_sign.launch

-<!-- -->
+<?xml version="1.0" encoding="UTF-8"?>
 <launch>
   <arg name="name"  default="stop"/>
   <arg name="model" default="sign"/>
@@ -8,16 +8,22 @@
   <arg name="y"     default="-0.5"/>
   <arg name="yaw"   default="3.14159"/>
   <arg name="parent" default="map"/>
-  <arg name="rviz"   default="false"/>
 
- <include file="$(find sign_description)/launch/description.launch">
-    <arg name="name"  value="$(arg name)"/>
-    <arg name="tag"   value="$(arg tag)"/>
-    <arg name="type"  value="$(arg type)"/>
-    <arg name="model" value="$(arg model)"/>
-    <arg name="rviz"  value="$(arg rviz)"/>
- </include>
-  
+  <param name="$(arg name)_description" 
+         command="$(find xacro)/xacro --inorder '$(find sign_description)/urdf/$(arg model).xacro' 
+                  name:=$(arg name)
+                  tag:=$(arg tag)
+                  type:=$(arg type)">
+  </param>
+
+  <node name="$(arg name)_state_publisher"
+        pkg ="robot_state_publisher"
+        type="robot_state_publisher">
+    <!--<param name="tf_prefix" value="/$(arg name)" type="str" />-->
+    <remap from="robot_description" to="$(arg name)_description" />
+    <remap from="/joint_states" to="/$(arg name)/joint_states" />
+  </node>
+ 
   <node name="spawn_urdf_$(arg name)"
         pkg ="gazebo_ros" 
         type="spawn_model"
@@ -28,4 +34,4 @@
       args="$(arg x) $(arg y) 0 $(arg yaw) 0 0 $(arg parent) $(arg name)_base_link 100">
   </node>
 
-</launch>
\ No newline at end of file
+</launch>

launch/spawn_test.launch

+<?xml version="1.0" encoding="UTF-8"?>
+<launch>
+  <arg name="name"   default="stop1"/>
+  <arg name="model"  default="sign"/>
+  <arg name="tag"    default="alvar0"/>
+  <arg name="type"   default="stop"/>
+  <arg name="x"      default="0.5"/>
+  <arg name="y"      default="-0.5"/>
+  <arg name="yaw"    default="3.14159"/>
+  <arg name="parent" default="map"/>
+
+  <include file="$(find sign_description)/launch/spawn_sign.launch">
+    <arg name="name"   value="$(arg name)"/>
+    <arg name="model"  value="$(arg model)"/>
+    <arg name="tag"    value="$(arg tag)"/>
+    <arg name="type"   value="$(arg type)"/>
+    <arg name="x"      value="$(arg x)"/>
+    <arg name="y"      value="$(arg y)"/>
+    <arg name="yaw"    value="$(arg yaw)"/>
+    <arg name="parent" value="$(arg parent)"/>
+  </include>
+
+  <node name="$(arg name)_rviz" pkg="rviz" type="rviz"
+        args="-d $(find sign_description)/rviz/$(arg name).rviz"/>
+</launch>
+

urdf/test2020.xacro

@@ -13,4 +13,4 @@
     <origin xyz="$(arg x) $(arg y) 0" rpy="0 0 $(arg yaw)"/>
   </xacro:sign>
 
-</robot>
\ No newline at end of file
+</robot>