LineCounter

A class that uses a line tracker to count the number of objects that pass by it.

Why

This class is so useful for any type of counting or switch operation. The problem with limit switches is that they break on basically anything, and bumper switches require a 10 ton weight on them to work. This class, however, can count objects within about half an inch without actually touching them.

Back in Change Up, I saw people putting line trackers on their intake to count the number of balls they had. I tried doing it with a limit switch, but it literally broke on the first or second ball that went through the intake. So I made this class

How

The vexcode API provides the line tracker with a reflectivity() function this function usually returns about 9 in open air, but when an object goes near, it spikes to about 20. So, I have a thread that updates all the line counters in the background and checks if the reflectivity is above a certain threshold. If it is, then it increments the counter.

Usage

This class keeps track of 2 values, the number of objects that have started to pass by, and the number of objects that have passed by.

LineCounter l = LineCounter(Brain.ThreeWirePort.A);

cout << l.getCountIn() << ", " << l.getCountOut() << endl;

Table of contents

• LineCounter(line&, bool = false)
• LineCounter(triport::port&, bool = false)
• active()
• firstHit()
• getCountIn()
• getCountOut()
• listVals()
• pressing()
• rawData()
• reset()
• setCount(int)