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by gloomyandy
Mon Feb 12, 2018 8:18 pm
Forum: EV3 Software
Topic: OpenCV query
Replies: 2
Views: 12

Re: OpenCV query

We ship 2.4.11 of openCV with leJOS. I did get 3.0 working on the EV3 (it is in our git repo), but at the time 3.0 was very new and all of the examples seemed to be for 2.4, also 3.0 seemed to be slower than 2.4 and given that the EV3 is not very powerful it seemed that 2.4 was the best bet.
by gloomyandy
Sun Feb 11, 2018 4:30 pm
Forum: EV3 Software
Topic: Long setup time for sensors
Replies: 2
Views: 25

Re: Long setup time for sensors

Yep that is pretty much correct. UART based sensors (basically the new ones from LEGO like the EV3 color, EV3 Ultrasonic, EV3 IR etc.) all take a long time to initialise. You basically don't see this time with the LEGO software because the sensor initialisation time is "hidden" by the LEGO...
by gloomyandy
Sat Feb 10, 2018 8:21 pm
Forum: NXJ Hardware
Topic: Full loss of motor control after installation
Replies: 1
Views: 8

Re: Full loss of motor control after installation

Are you sure that the problem is not with your motors or cables? There have been no other reports of this type with leJOS and it seems strange that you have managed to to whatever it is you have done to two NXTs! I also note from your earlier post that you had some sort of motor control issue earlie...
by gloomyandy
Thu Feb 08, 2018 3:59 pm
Forum: leJOS EV3 Development
Topic: Working with the source code
Replies: 4
Views: 23

Re: Working with the source code

You won't be able to see the Linux file system on the SD card from a PC. The easy way is probably to transfer the file when the EV3 is running. There are various ways to do this (the ant files show one way). Do you know anything about Linux? If you are going to do anything serious with the EV3 you r...
by gloomyandy
Thu Feb 08, 2018 3:21 pm
Forum: EV3 Software
Topic: External Jar libraries on EV3
Replies: 6
Views: 747

Re: External Jar libraries on EV3

It probably could be addressed, however, I'm not sure there will ever be an updated release, there has been very little activity over the last year or so. But who knows perhaps someone will take it on!
by gloomyandy
Thu Feb 08, 2018 9:17 am
Forum: leJOS EV3 Development
Topic: Working with the source code
Replies: 4
Views: 23

Re: Working with the source code

If you build a new ev3class.jar file then you need to update the copy of this file that is on your ev3. Otherwise you will be compiling against one version but running with a different one. You will also need to restart the EV3 (or at least the menu as that will be using the "old" ev3class...
by gloomyandy
Mon Feb 05, 2018 7:05 pm
Forum: EV3 Software
Topic: Nxt cam V5 How to check the color of the object being tracked
Replies: 1
Views: 20

Re: Nxt cam V5 How to check the color of the object being tracked

You pass a parameter into the setTrackingMode method to control the mode see... http://www.lejos.org/ev3/docs/lejos/hardware/device/NXTCam.html#setTrackingMode-char- As to getting the colour, well you can use: http://www.lejos.org/ev3/docs/lejos/hardware/device/NXTCam.html#getObjectColor-int- This d...
by gloomyandy
Mon Feb 05, 2018 6:58 pm
Forum: EV3 Software
Topic: LeJOS Chassis object or MovePilot class
Replies: 2
Views: 33

Re: LeJOS Chassis object or MovePilot class

You can use either, it depends what sort of motion you want. The Chassis is a slightly "lower level" class and allows you to specify motion in terms of linear and rotational velocity, this is very well suited to a robot that wants to use continuous movement (like say a line follower or my ...
by gloomyandy
Mon Feb 05, 2018 9:25 am
Forum: EV3 Software
Topic: nxt cam LineTracking TOPIC
Replies: 5
Views: 53

Re: nxt cam LineTracking TOPIC

Ignore the code it was just and example of how to use the code tags!
by gloomyandy
Sun Feb 04, 2018 8:27 am
Forum: EV3 Software
Topic: Bug : moveStarted called before moveStopped with Navigator
Replies: 4
Views: 41

Re: Bug : moveStarted called before moveStopped with Navigator

Licensing for leJOS is a bit of a mess. It is basically GPL, but don't worry about it.So long as you are not planning on selling it for a fortune I doubt if anyone will be very concerned. Just make sure you acknowledge the leJOS project and its authors if you publish anything.
by gloomyandy
Fri Feb 02, 2018 8:14 am
Forum: EV3 Software
Topic: nxt cam LineTracking TOPIC
Replies: 5
Views: 53

Re: nxt cam LineTracking TOPIC

The code tags are used to surround code. When you are making a post look just above where you are typing you will see a line of buttons labelled.. "B" "i" "u" "Quote" "Code" etc. These can be used to format your post. If you use the "Code" ...
by gloomyandy
Thu Feb 01, 2018 3:56 pm
Forum: EV3 Software
Topic: nxt cam LineTracking TOPIC
Replies: 5
Views: 53

Re: nxt cam LineTracking TOPIC

Sorry can't help as I've never tried to use the NXTCam in line tracking mode. What I can say is that the NXTCam is a very complex sensor to work with and is very sensitive to the lighting conditions that you are using it under (as are all low cost camera based sensors). It will not be an easy projec...
by gloomyandy
Wed Jan 31, 2018 3:41 pm
Forum: EV3 Software
Topic: Bug : moveStarted called before moveStopped with Navigator
Replies: 4
Views: 41

Re: Bug : moveStarted called before moveStopped with Navigator

Yep this is a sort of known issue. See the discussion in this thread... https://lejos.sourceforge.io/forum/viewtopic.php?f=18&t=7528&start=45 and this one... https://lejos.sourceforge.io/forum/viewtopic.php?f=18&t=9091 As you can see I proposed a possible fix, but I'm not aware of anyone...
by gloomyandy
Fri Jan 26, 2018 8:37 pm
Forum: EV3 Software
Topic: LCD.clear(int y) clears more than expected !?
Replies: 3
Views: 57

Re: LCD.clear(int y) clears more than expected !?

LCD is different to the lcd you are using in the rest of your code. The screen can be accessed in two modes one is character based and uses co-ordinates that are in characters (not pixels), the other is in graphics mode and uses co-ordinates that are in pixels. The static LCD references the characte...

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