Coraffic - Cornell MPS Program Team

Traffic Simulator for Microsoft Makecode Editor

This program allows you to interact with traffic simulation using PXT (Microsoft Programming Experience Toolkit)

• Try it alive: https://liolop.github.io/Coraffic

Preview of the Editor

Editor Example

• Preview of the Example

• Code Example

  Beat the Traffic - Event

  // Create event blocks
  events.onCarInter(0, function () {
      intersections.setDirAtInter(TLDir.NS, 0)
      intersections.setDirAtInter(TLDir.EW, 1)
      intersections.setDirAtInter(TLDir.NS, 2)
  })
  

  Beat the Traffic - Intersections

  /* Create controls of intersections' actions */
  
  // Create a forever loop
  loops.forever(function () {
    // Create a for loop for setting up the allowed directions to be North-South at all intersections
    for (let index = 0; index <= 7; index++) {
        intersections.setDirAtInter(TLDir.NS, index)
    }
  })
  

  Beat the Traffic - Status

  /* Use Status blocks to check conditions for controlling intersections
  
  loops.forever(function () {
    for (let index = 0; index <= 7; index++) {
        // Check number of cars waiting for North-South at intersection (index)
        if (status.getCarsWait(TLDir.NS, index) > 1) {
            intersections.setDirAtInter(TLDir.NS, index)
        } 
        // Check number of cars waiting for East-West at intersection (index)
        else if (status.getCarsWait(TLDir.EW, index) >= 1) {
            intersections.setDirAtInter(TLDir.EW, index)
        } 
        // Check allowed direction at intersection (index)
        else if (status.getDirection(index) == status.locParam(TLDir.NS)) {
            intersections.setDirAtInter(TLDir.EW, index)
        } 
        // Check how long has the allowed direction been set at a random intersection
        else if (status.getDuration(status.randIndex()) >= 2) {
            intersections.setDirAtInter(TLDir.NS, status.randIndex())
        }
    }
  })
  

Running Locally

Set up

• Install node.js

• Install PXT command line

  npm install -g pxt
  

• Install the dependencies

  npm install
  

Running the local server

• After you're done, simple run this command to open a local web server:

  pxt serve
  

• Updating the tools

  pxt update
  

More

More instructions at https://github.com/Microsoft/pxt#running-a-target-from-localhost