laser.js

function Laser(spos, angle) {
    this.pos = createVector(spos.x,spos.y);
    this.vel = p5.Vector.fromAngle(angle);
    this.vel.mult(10);
    
    this.update = function(){
        this.pos.add(this.vel);
    }
    
    this.render = function(){
        push();
        stroke(255);
        strokeWeight(2); 
        point(this.pos.x , this.pos.y);
        pop();
    }
    
    this.hits = function(asteroid){
        var last_pos = p5.Vector.sub(this.pos, this.vel);
        var last_angle = p5.Vector.sub(last_pos, asteroid.pos).heading();
        var new_angle = p5.Vector.sub(this.pos, asteroid.pos).heading();
        var asteroid_vertices = asteroid.verticesFromAngles(last_angle, new_angle);
        for(var i = 0; i < asteroid_vertices.length - 1; i++) {
            if(lineIntersect(last_pos, this.pos, asteroid_vertices[i], asteroid_vertices[i + 1])) {
                return true;
            }
        }
        return false;
    }
    
    this.offscreen = function() {
        if (this.pos.x > width || this.pos.x < 0) {
            return true;
        }
        if (this.pos.y > height || this.pos.y < 0) {
            return true;
        }
        return false;
    }
}