rviz problems

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Hello

I installed some package and run them , after that should open up the visualisation tool, in which I should be able to see the wheelchair moving in the map created using the some data. But when opened the rviz the wheelchair is not moving, I got some warning like 3D acceleration is not enable. Im running ubuntu 10.4 on a Virtual Box machine from Oracle.

This is my launch file and the data bag file.

Perform AMCL localisation: runs several nodes to generate odometry from laser scans (ICP) & IMU, loads a map of the POW assessment area, runs AMCL, plays back a dataset for localisation, and runs the visualiser with the correct visualisation parameters configured. -->

<launch>

<node name="rosplay" pkg="rosbag" type="play" args="/home/bojan/Desktop/PowRos/Data/user2/pow_pat1_1_2011-04-01-13-48-20.bag            --clock"/>

<node pkg="tf" type="static_transform_publisher" name="baselink_laser" args="0 0 0 0 0 0 /base_link /laser 10"/>
<node pkg="tf" type="static_transform_publisher" name="laser_imu" args="0 0 0 0 0 0 /laser /base_imu 10"/>
<node pkg="tf" type="static_transform_publisher" name="baselink_camera" args="0 0 0 0 0 0 /base_link /camera 10"/>

<!-- Start the map server node and specify the map file (*.pgm) and the map resolution in metres/pixel -->
<node name="map_server" pkg="map_server" type="map_server" args="$(find amcl_listener)/maps/pow_real_time.yaml"         output="screen"/>

<!--Start the Laser_scan_matcher package, to provide odometry from laser data (ICP)-->
<node pkg="laser_scan_matcher" type="laser_scan_matcher_node" 
    name="laser_scan_matcher_node" output="screen">
    <param name="use_alpha_beta" value="true"/>
    <param name="max_iterations" value="10"/>
</node>

<!-- Start the gmapping node -->
<!--node pkg="gmapping" type="slam_gmapping" name="slam_gmapping" output="screen"/-->

<node pkg="amcl" type="amcl" name="amcl" respawn="true" output="screen">
    <param name="base_frame_id" value="base_link"/>
    <param name="odom_frame_id" value="world"/>
    <param name="global_frame_id" value="map"/>
    <param name="update_min_d" value="0.09"/>   
    <param name="update_min_a" value="0.09"/> 
    <param name="initial_pose_x" value="-1"/>
    <param name="initial_pose_y" value="0"/>
    <param name="initial_pose_a" value="-0.1"/>
    <param name="min_particles" value="6000"/> 
    <param name="max_particles" value="8000"/>
    <param name="odom_model_type" value="diff"/>
    <param name="kld_err" value="0.1"/> 
    <param name="resample_interval" value="1"/>
    <param name="odom_alpha1" value="0.2"/>   
    <param name="odom_alpha2" value="0.2"/>
    <param name="odom_alpha3" value="0.5"/>
    <param name="odom_alpha4" value="0.5"/>
    <param name="laser_max_beams" value="30"/>
</node>

<!--Start the "analyzer_packages"-->
<!-- acml_listener broadcasts markers for the position of the wheelchair, to visualize in Rviz-->
<node pkg="amcl_listener" type="amcl_pose_listener" name="amcl_listener" output="screen"/>
<!-- Object node records minimal ranges from laser, speed_node will record travel speed of wheelchair -->
<node pkg="pow_analyzer" type="object_node" name="object_node" output="screen"/>
<node pkg="pow_analyzer" type="speed_node" name="speed_node" output="screen"/>

<!-- Start an rviz node with a custom configuration for the viewpoint, map_server, trajectory, laser scans, etc -->
<node pkg="rviz" type="rviz" output="screen" name="rviz" args="-d $(find pow_analyzer)/launch/pow_rviz.vcg"/>

</launch>

Also in the rviz the ROS elapsed time is zero, which should not be the case Any help¿ Ok will explain in details.

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