Search found 224 matches

by fferri
16 Oct 2018, 23:02
Forum: General questions
Topic: Interface between Velodyne VPL16 and ROS
Replies: 5
Views: 39

Re: Interface between Velodyne VPL16 and ROS

Especially, the "points" field requires geometry_msgs/Point32[] . When I want to feed it with results from velodyne, error shows up and saying it is not the right type. How should I convert it? since the points field is an array of Point32 message, it should be something like this (in Lua): {points...
by fferri
16 Oct 2018, 17:44
Forum: General questions
Topic: Interface between Velodyne VPL16 and ROS
Replies: 5
Views: 39

Re: Interface between Velodyne VPL16 and ROS

Whether you should use sensor_msgs/PointCloud or sensor_msgs/PointCloud2 depends on which message types the receiving part can support. If it is RViz, it is capable of displaying both. The main difference is that PointCloud contains point data stored as arrays of points and float values, and it is s...
by fferri
16 Oct 2018, 11:04
Forum: General questions
Topic: Interface between Velodyne VPL16 and ROS
Replies: 5
Views: 39

Re: Interface between Velodyne VPL16 and ROS

Do you see the data arriving at the /velodyne topic? To test, run the following in a terminal: rostopic echo /velodyne If yes, then it might be a problem of choosing the correct frame in RViz (try selecting the velodyneVPL frame). If in RViz you select the /map frame, but no tf frame linking /map to...
by fferri
16 Oct 2018, 11:01
Forum: General questions
Topic: How do I use Ompl to generate the correct path?
Replies: 3
Views: 40

Re: How do I use Ompl to generate the correct path?

Just an additional note: that example scene might be overly complicated. If you follow the manual page of the OMPL plugin , it gives you the list of functions to call (exactly in that order): Decide of a start and goal state. When the path planning object is a serial manipulator, a goal pose (or end...
by fferri
16 Oct 2018, 10:38
Forum: General questions
Topic: Problem with installing UI on V-rep
Replies: 3
Views: 20

Re: Problem with installing UI on V-rep

Hi je67101,

please report all the steps you tried, and what failed, including any relevant error messages you see in the terminal and/or in the V-REP's status bar.

It is not possible to help you otherwise.
by fferri
15 Oct 2018, 07:56
Forum: General questions
Topic: How do I use Ompl to generate the correct path?
Replies: 3
Views: 40

Re: How do I use Ompl to generate the correct path?

It may happen that OMPL does not find a path (due to insufficient planning time given).
You should check the path variable.
by fferri
11 Oct 2018, 07:10
Forum: General questions
Topic: Problem about running locking screw process
Replies: 1
Views: 43

Re: Problem about running locking screw process

It appears that the dynamic content includes non-pure non-convex shapes. This is never recommended since this will drastically slow down the simulation, and in addition to that, non-pure non-convex shapes are not as stable as pure shapes or convex shapes. To find the incriminating shape(s), make su...
by fferri
09 Oct 2018, 16:50
Forum: General questions
Topic: How do I programmatically check if compound shape is convex?
Replies: 3
Views: 91

Re: How do I programmatically check if compound shape is convex?

Not sure wether V-REP can natively do this.

The CGAL library has convexity checking routines.

If you want to use those routines, consider extending or basing your work off the Surface Reconstruction plugin, which already uses CGAL's functions.
by fferri
27 Sep 2018, 15:10
Forum: General questions
Topic: simOMPL.Algorithm.RRTConnect
Replies: 2
Views: 73

Re: simOMPL.Algorithm.RRTConnect

Hi Jas,

is this problem specific to RRTConnect? Do you have a reproducible testcase?