TheElk's profile - activity

So i looked through all files from RVIZ and OGRE and the only occurence of the string "8192" that makes sense is the "#define THREADCACHEMAX 8192" from nedmalloc/nedmalloc.c from OGRE. Maybe this ist he point but I dont know exactly

The number of Elements of a BillboardChain (obviously the datatype responsible for storing Marker in RVIZ; from Ogre) has a limit named mChainCount which can be set in its constructor. Maybe RVIZ sets this value to 8192. I'll investigate a little further, maybe i find a proper answer.

I dont think that this is the problem, as it runs fiene for the first approx. 8200 Points. Shouldnt it then crash at 100 Points?

Hi

im facing an error whenever I try to visualize a Marker::LINE_STRIP with more than (approx) 8200 Points in it. The code seems to run fine but RVIZ crashes with an chainIndex out of bounds Exception. The Exact output ist:

[ WARN] [1410267962.066933906]: OGRE EXCEPTION(5:ItemIdentityException): chainIndex out of bounds in BillboardChain::addChainElement at /build/buildd/ogre-1.8-1.8.1+dfsg/OgreMain/src/OgreBillboardChain.cpp (line 243)
Qt has caught an exception thrown from an event handler. Throwing
exceptions from an event handler is not supported in Qt. You must
reimplement QApplication::notify() and catch all exceptions there.

terminate called after throwing an instance of 'Ogre::ItemIdentityException'
  what():  OGRE EXCEPTION(5:ItemIdentityException): chainIndex out of bounds in BillboardChain::addChainElement at /build/buildd/ogre-1.8-1.8.1+dfsg/OgreMain/src/OgreBillboardChain.cpp (line 243)
Aborted (core dumped)

Is there a Limit of points I am able to vizualize using one single Marker?

Thanks in Advance

Hey, I tried to implement a simple StaticTransformBroadcaster with the following code:

#include <ros/ros.h>

#include <tf2_ros/static_transform_broadcaster.h>
#include <tf2/transform_datatypes.h>

#include <geometry_msgs/TransformStamped.h>
#include <geometry_msgs/Transform.h>

void publishStaticTransformation();
int main (int argc, char** argv)
{
    ros::init(argc, argv, "StaticBroadcaster");

    ROS_INFO("StaticBroadcaster started");
    publishStaticTransformation();
    ros::spin();
}

void publishStaticTransformation()
{
    tf2_ros::StaticTransformBroadcaster staticBroadcaster2;

    geometry_msgs::TransformStamped msg;
    msg.header.stamp = ros::Time::now();

    msg.header.frame_id = "base_link";
    msg.child_frame_id = "child_2";

    msg.transform.rotation.x = 2.0;
    msg.transform.rotation.y = 2.0;
    msg.transform.rotation.z = 0.0;
    msg.transform.rotation.w = 1.0;

    msg.transform.translation.x = 0;
    msg.transform.translation.y = 0;
    msg.transform.translation.z = 0;

    staticBroadcaster2.sendTransform(msg);
    ROS_INFO_STREAM("published");
}

This doesn't work but i don't know why. "published" is printed on the Console but rqt_graph shows no connection between my broadcaster and the tf_static topic. However, wehn I Create the StaticTransformBroadcaster first and pass it as an argument to my publishStaticTransformation-method it works.

#include <ros/ros.h>

#include <tf2_ros/static_transform_broadcaster.h>
#include <tf2/transform_datatypes.h>

#include <geometry_msgs/TransformStamped.h>
#include <geometry_msgs/Transform.h>

void publishStaticTransformation(tf2_ros::StaticTransformBroadcaster &staticBroadcaster);

int main (int argc, char** argv)
{
    ros::init(argc, argv, "StaticBroadcaster");

    ROS_INFO("StaticBroadcaster started");
    tf2_ros::StaticTransformBroadcaster staticBroadcaster;
    publishStaticTransformation(staticBroadcaster);
    ros::spin();
}

void publishStaticTransformation(tf2_ros::StaticTransformBroadcaster &staticBroadcaster)
{
    geometry_msgs::TransformStamped msg;

    msg.header.stamp = ros::Time::now();

    msg.header.frame_id = "base_link";
    msg.child_frame_id = "child_2";

    msg.transform.rotation.x = 2.0;
    msg.transform.rotation.y = 2.0;
    msg.transform.rotation.z = 0.0;
    msg.transform.rotation.w = 1.0;

    msg.transform.translation.x = 0;
    msg.transform.translation.y = 0;
    msg.transform.translation.z = 0;

    staticBroadcaster.sendTransform(msg);
}

Does anyone know, what I'm doing wrong?
Any help is appreciated

Tank you very much for your answer !