Meeple

Meeple is a JavaScript library for interacting with the Roll20 Scripting API, focused on token behavior. Using Meeple, you can create a scene and then script tokens to interact with the scene as meeples.

Example Usage

Meeple is designed to help reduce the overhead for scripting behavior. As an example, let's look at the "Patrolling Token" example given in the Advanced Examples documentation for the Roll20 Scripting API. In the example, you're writing a script to simulate a guard patrolling back and forth in a hallway. Here's how you could do it with Meeple.

// Grab Meeple and Scene from the library
import { Meeple, Scene } from 'meeple';

// Define our guard meeple we want to use
const guard = new Meeple('Guard A', () => {

  // This function defines the guard's behavior. In this case
  // we want him to walk right for three steps and then walk
  // left for three steps.

  if (this.stepsTaken > 3) {
    this.walkingRight = !this.walkingRight;
    this.stepsTaken = 0;
  }
  
  if (this.walkingRight) {
    this.token.move(0, 1);
  } else {
    this.token.move(0, -1);
  }
  
  this.stepsTaken++;
});

// Make sure we start our step counter at 0
// and set our guard to walking right
guard.stepsTaken = 0;
guard.walkingRight = true;

// Now that we have our guard, we need a scene
const scene = new Scene([guard], {
  // We need to set how fast we want the scene to move
  clockSpeed: 5000,
});

// Finally, we start our scene
scene.start();