Problem converting simple urdf file in collada

asked 2014-12-05 19:02:32 -0600

Hi all, I have a problem converting a very simple urdf file in collada (.dae) to use ikfast. I have a more complicated robot but I started to have this error even with a very simple urdf file:

I/O error : No such file or directory
I/O error : No such file or directory
error : xmlNewTextWriterFilename : cannot open uri

Document successfully written to prova.dae

but the prova.dae file does not exist. The prova.urdf file that I am trying to convert is:

<robot name="prova">

<link name="base_link" />
<link name="link1"/>

<joint name="j1" type="revolute">
  <parent link="base_link"/>
  <child link="link1"/>
  <origin rpy="0 0 0" xyz="0.0 0.0 0.0"/>
  <axis xyz="1 0 0"/>
  <limit effort="40" lower="-0.785" upper="0.785" velocity="3.1415"/>
</joint>

</robot>

so just pure kinematics. I am using ros indigo with openrave compiled from source (latest_stable branch). I am using the command:

rosrun collada_urdf urdf_to_collada prova.urdf prova.dae

in the same folder of the urdf file. My machine is running Ubuntu 14.04. thanks for your help!

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Same problem here. Any solution ?

salsaman ( 2015-04-07 15:21:56 -0600 )edit

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answered 2015-04-08 08:26:17 -0600

Simon Schmeisser
229 ●5 ●9 ●16

updated 2015-04-08 08:28:37 -0600

I have the same problem. Here comes my "workaround" (it is quite a bit of work ...)

Define a new robot in openRAVE XML Format:

http://openrave.programmingvision.com...

( <source xml> in the Wiki is not part of the code!)

Install openrave (from source) and start an interactive terminal

openrave.py -i

here you can use

env.Reset(); env.Load('rv4fl.xml')

to load/reload your model. Do so until it looks fine. Press ESC to go into Manipulation Mode. Try selecting a link by pressing CTRL and clicking it. Now check if it moves as expected when you move the mouse.

Now convert to COLLADA:

openrave -save test.dae rv4fl.xml

you can check that as well

openrave test.dae

Now you need the ids of base and end effector

openrave-robot.py test.dae --info links

create the ik-fast solution:

python `openrave-config --python-dir`/openravepy/_openravepy_/ikfast.py --robot=test.dae --iktype=transform6d --baselink=0 --eelink=6 --savefile=test.cpp

install moveit_ikfast from git and create a moveit_package

rosrun moveit_ikfast create_ikfast_moveit_plugin.py mitsubishi_rv4fl manipulator mitsubishi_rv4fl_moveit_plugins  test.cpp

This will also automatically set up ik_fast in your moveit_config package

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answered 2015-12-20 19:51:18 -0600

Kei Okada

1186 ●29 ●52 ●57

this has been fixed by newer version of collada library, see https://github.com/ros/robot_model/is...

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answered 2015-04-07 04:28:28 -0600

sansherlock@gmail.com
11 ●1 ●2

Have you solve the problem?

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The problem can be solved with ROS of Hydro.I have tried it successfully.

sansherlock@gmail.com ( 2015-04-09 01:46:56 -0600 )edit

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answered 2014-12-09 08:52:45 -0600

Enrico

41 ●4 ●5 ●8 http://www.iit.it/it/p...

If someone can try to convert it to see if it is only a my problem. Thankyou

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answered 2015-04-07 16:15:27 -0600

130s

10937 ●203 ●339 ●330 http://www.linkedin.co...

updated 2015-04-07 16:17:49 -0600

I confirmed on Indigo that this happens with the prova.urdf that you provided.

$ dpkg -p ros-indigo-collada-urdf | grep Ver
Version: 1.11.6-0trusty-20150328-2358-+0000

As a work around, I confirmed that this doesn't happen on Hydro for some reason, as reported in https://github.com/ros/robot_model/is... . To my knowledge, there's no difference between ROS distros (eg. Hydro, Indigo) in model file formats creation so you can use the collada file you generated on Hydro in Indigo world.

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answered 2015-02-01 05:59:11 -0600

Valts
41 ●1 ●1 ●2

I am having the exact same problem on ROS Indigo on Ubuntu 14.04! Even on very simple URDF files. I am not sure if this is related, but as an alternative I also tried to convert the URDF to DAE in code, as follows:

#include <collada_urdf/collada_urdf.h>

boost::shared_ptr<DAE> dom;
if (!collada_urdf::colladaFromUrdfFile("waiterbot.urdf", dom)) {
    ROS_ERROR("Failed to construct COLLADA DOM");
    return false;
}
collada_urdf::colladaToFile(dom, "waiterbot.dae");

But this gives the following build error:

In file included from /home/waiterbot/catkin_ws/src/waiterbot_description/src/collada_urdf.cpp:1:0:
/opt/ros/indigo/include/collada_urdf/collada_urdf.h:42:17: fatal error: dae.h: No such file or directory
 #include <dae.h>
                 ^
compilation terminated.

I installed ROS as ros-indigo-desktop-full and it appears that there is something deeply wrong in the way the packages are set up. My knowledge in CMake and catkin isn't deep enough to find the problem. I have already wasted 4 hours on this with no success. Any help would be greatly appreciated.

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