sensor.js

class Sensor {
    constructor(dirX, dirY) {
        this.direction = createVector(dirX, dirY);
        this.position = createVector();
        this.collisionPoint = createVector();
      	this.distance = 0;
    }

    show() {
        stroke(210, 210, 210);
        strokeWeight(1);

        line(this.position.x, this.position.y, this.collisionPoint.x, this.collisionPoint.y);
      
      	fill(230, 170, 170);
      	noStroke();
      
      	ellipse(this.collisionPoint.x, this.collisionPoint.y, 7, 7);
    }

    update(posX, posY) {
        this.position.x = posX;
        this.position.y = posY;

        this.collisionPoint.x = posX;
        this.collisionPoint.y = posY;

        while (!gTerrain.collidesCircle(this.collisionPoint.x, this.collisionPoint.y, 1)) {
            this.collisionPoint.add(this.direction.x, this.direction.y);
        }
      
      	this.distance = dist(posX, posY, this.collisionPoint.x, this.collisionPoint.y);
    }
}