Plotting Location w/ Accellerometer Project

[Aaron.Graeve]

Originally Posted by Invictus3593

I just tried to write up a point overlay in the dashboard like you said using the IMAQ Point overlay vi, but I can't seem to get it to actually plot a few points on the image, do you have any examples? Do you have any sample code left?

Unfortunately, I do not have any code to show and I do not have access to the libraries to recreate it. I may be able to get an example together when I go home this weekend and can get to my laptop, but until then, I can share nothing. I would only recommend that you make sure you apply the overlay after the dashboard clears the pre-existing overlays. It also may not hurt to test the overlays on a stock image (i.e. read an image from a file and try and apply the overlay; it will help make sure the process is correct.) I will post some code if I get a chance.

[Joe Ross]

Originally Posted by Greg McKaskle

You could also do this in an XY graph.

Here's how we used an XY graph to show a robot's path with a cursor showing current position.

[Tom Line]

Originally Posted by Joe Ross

Here's how we uses an XY graph to show a robot's path with a cursor showing current position.

Joe, what functional purpose does the X-Y graph have?

[Joe Ross]

Originally Posted by Tom Line

Joe, what functional purpose does the X-Y graph have?

Just for display and debugging.

[Invictus3593]

Originally Posted by Aaron.Graeve

I would only recommend that you make sure you apply the overlay after the dashboard clears the pre-existing overlays.

That may be what I missed, it already overlays the points on a bmp of the field found here.

Here's how we used an XY graph to show a robot's path with a cursor showing current position.

What System did you use to get the X and Y values of the robot's position?

[Aaron.Graeve]

If it already overlays the points, is there any issue?
Additionally, your robot x and y coordinates would probably be generated using the algorithm this thread was discussing earlier and pulled from the robot to the dashboard. Correct me if I am wrong, but I thing Joe used simple input controls to illustrate the point (no pun intended) of using an XY Graph.

[Ether]

Originally Posted by Aaron.Graeve

your robot x and y coordinates would probably be generated using the algorithm this thread was discussing earlier

The equations and code for getting X, Y, and orientation from 3 omni follower wheels is discussed in Post 11 in this thread:

http://www.chiefdelphi.com/forums/sh...d.php?t=120022

[Invictus3593]

Originally Posted by Aaron.Graeve

If it already overlays the points, is there any issue?
Additionally, your robot x and y coordinates would probably be generated using the algorithm this thread was discussing earlier and pulled from the robot to the dashboard. Correct me if I am wrong, but I thing Joe used simple input controls to illustrate the point (no pun intended) of using an XY Graph.

-That's just it, I can't get it to overlay points with the IMAQ overlay, I have yet to try Joe's method, but it looks promising!
-I did see that, and I was thinking about using the SmartDashboard to read the encoder values from the robot, just the numeric values, then do the calculations on the driver station, reducing CPU usage.

The equations and code for getting X, Y, and orientation from 3 omni follower wheels is discussed in Post 11 in this thread:

http://www.chiefdelphi.com/forums/sh...d.php?t=120022

Thanks! I was wondering what the configuration of the wheel would look like. Also, the code really helped clear up confusion I had about how position would be calculated. So on the dashboard, one would just need to read the X, Y, and Q values and set them on the graph? The Arc & Chord pdf later in that thread helped a lot as well.