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Unread 03-27-2016, 10:24 PM
Ben Wolsieffer Ben Wolsieffer is offline
Dartmouth 2020
AKA: lopsided98
FRC #2084 (Robots by the C)
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Join Date: Jan 2011
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Re: Pathfinder - Fast Motion Profiling for Java and C++, Tank and Swerve Drive

Quote:
Originally Posted by Jaci View Post
The most major modification is C rewrite, however the structure has been changed, and some of the more mathematical functions of the library have been optimized.

The main advantages are the speed and portability. Pathfinder will run on either Java or C++ robots, and also has the added support for Swerve Drive. As for integrating it into you robot code, it should be a fairly similar experience to TrajectoryLib
The main reasons I feel it is harder to integrate are the lack of the ability to load trajectories from files and that it assumes that the encoder values are not already scaled to physical units. This second limitation can be easily worked around with some math.

I am curious, though, why you chose to do the tick to distance conversion within Pathfinder. Both the Talon SRX and the WPILib Encoder object will do distance scaling for you, so why didn't you just use that?

My original plan was to have a bunch of pre-generated trajectories and just choose to load the one for our selected autonomous. I have decided to use your library after all, and generate multiple trajectories concurrently in the background. This makes the whole process simpler to manage.
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2016 North Shore District - Semifinalists and Excellence in Engineering Award
2015 Northeastern University District - Semifinalists and Creativity Award
2014 Granite State District - Semifinalists and Innovation in Control Award
2012 Boston Regional - Finalists
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