bxl's profile - activity

I have an UAV and my idea is to make it moves around some points I pass to it. My logic is the following:
1- Moves UAV in z-axis to adjust high;
2- Rotates around z-axis;
3- Moves forward on x-axis until reach the goal.

Step 1 works fine, but I'm getting problems on step number 2.
I have one coordinate frame for the the UAV and I get the angle between the uav and the point (in the world) as a transform between the frames of my goal_point and the UAV:

angle = transform_goal_robotPose.getRotation().getAngle();

However, I cannot get a metric to compare with and establish that the uav has rotated the correct angle and then can go to step 3. I was thinking about something like a comparison if (angle == expected_angle), but couldn't figure out none.
Someone knows how can I get it?

Which python interpreter version is most advisable to use with ROS kinetic and gazebo 7 simulator? As I read to set up ros to work with python 3 requires a extra effort.

Link opencv in Cmakelist.txt What is the proper way of linking OpenCV on CMakeList.txt? That's my CmakeList.txt: find

From cmake docs target must have been created by add_executable command which expects a C/C++, however I'm using python

From cmake docs target must have been created by add_executable which is a C/C++, however I'm using python

From cmake docs target must have been creates by add_executable which is a C/C++, however I'm using python

Link opencv in Cmakelist.txt What is the proper way of linking OpenCV on CMakeList.txt? That's my CmakeList.txt: find

It's working now

I`m trying to write a ros module in python, but I'm facing this issue below:

import: not authorized `rospy' @ error/constitute.c/WriteImage/1028.
from: can't read /var/mail/sensor_msgs.msg
from: can't read /var/mail/tf2_msgs.msg
from: can't read /var/mail/geometry_msgs.msg
from: can't read /var/mail/cv_bridge

Is there any configuration wrong in CmkaList.txt or package.xml? Am I missing any file for cmake compile correctly python code?

EDIT #1: Added code

#!/usr/bin/env python

import rospy
from sensor_msgs.msg import Image,CameraInfo
from tf2_msgs.msg import TFMessage
from geometry_msgs.msg import TransformStamped
from cv_bridge import CvBridge
import airsim
import cv2
import numpy as np here

EDIT #2: The script is already executable chmod u+x script.py

Look in your packages if package.xml are correctly. That was my error when I had this issue.

Look in your packages if package.xml are correctly. That was my error when I had this issue.

I found the solution to this problem. It happens there was a parser error in package.xml in one of my packages.