var vehicles = []; var food = []; var poison = []; var debug; function setup() { createCanvas(640, 360); for (var i = 0; i < 10; i++) { var x = random(width); var y = random(height); vehicles[i] = new Vehicle(x, y); } for (var i = 0; i < 40; i++) { var x = random(width); var y = random(height); food.push(createVector(x, y)); } for (var i = 0; i < 20; i++) { var x = random(width); var y = random(height); poison.push(createVector(x, y)); } // debug = createCheckbox(); } function mouseDragged() { vehicles.push(new Vehicle(mouseX, mouseY)); } function draw() { background(51); if (random(1) < 0.1) { var x = random(width); var y = random(height); food.push(createVector(x, y)); } if (random(1) < 0.01) { var x = random(width); var y = random(height); poison.push(createVector(x, y)); } for (var i = 0; i < food.length; i++) { fill(0, 255, 0); noStroke(); ellipse(food[i].x, food[i].y, 4, 4); } for (var i = 0; i < poison.length; i++) { fill(255, 0, 0); noStroke(); ellipse(poison[i].x, poison[i].y, 4, 4); } for (var i = vehicles.length - 1; i >= 0; i--) { vehicles[i].boundaries(); vehicles[i].behaviors(food, poison); vehicles[i].update(); vehicles[i].display(); var newVehicle = vehicles[i].clone(); if (newVehicle != null) { vehicles.push(newVehicle); } if (vehicles[i].dead()) { var x = vehicles[i].position.x; var y = vehicles[i].position.y; food.push(createVector(x, y)); vehicles.splice(i, 1); } } } var mr = 0.01; function Vehicle(x, y, dna) { this.acceleration = createVector(0, 0); this.velocity = createVector(0, -2); this.position = createVector(x, y); this.r = 4; this.maxspeed = 5; this.maxforce = 0.5; this.health = 1; this.dna = []; if (dna === undefined) { // Food weight this.dna[0] = random(-2, 2); // Poison weight this.dna[1] = random(-2, 2); // Food perception this.dna[2] = random(0, 100); // Poision Percepton this.dna[3] = random(0, 100); } else { // Mutation this.dna[0] = dna[0]; if (random(1) < mr) { this.dna[0] += random(-0.1, 0.1); } this.dna[1] = dna[1]; if (random(1) < mr) { this.dna[1] += random(-0.1, 0.1); } this.dna[2] = dna[2]; if (random(1) < mr) { this.dna[2] += random(-10, 10); } this.dna[3] = dna[3]; if (random(1) < mr) { this.dna[3] += random(-10, 10); } } // Method to update location this.update = function() { this.health -= 0.005; // Update velocity this.velocity.add(this.acceleration); // Limit speed this.velocity.limit(this.maxspeed); this.position.add(this.velocity); // Reset accelerationelertion to 0 each cycle this.acceleration.mult(0); } this.applyForce = function(force) { // We could add mass here if we want A = F / M this.acceleration.add(force); } this.behaviors = function(good, bad) { var steerG = this.eat(good, 0.2, this.dna[2]); var steerB = this.eat(bad, -1, this.dna[3]); steerG.mult(this.dna[0]); steerB.mult(this.dna[1]); this.applyForce(steerG); this.applyForce(steerB); } this.clone = function() { if (random(1) < 0.002) { return new Vehicle(this.position.x, this.position.y, this.dna); } else { return null; } } this.eat = function(list, nutrition, perception) { var record = Infinity; var closest = null; for (var i = list.length - 1; i >= 0; i--) { var d = this.position.dist(list[i]); if (d < this.maxspeed) { list.splice(i, 1); this.health += nutrition; } else { if (d < record && d < perception) { record = d; closest = list[i]; } } } // This is the moment of eating! if (closest != null) { return this.seek(closest); } return createVector(0, 0); } // A method that calculates a steering force towards a target // STEER = DESIRED MINUS VELOCITY this.seek = function(target) { var desired = p5.Vector.sub(target, this.position); // A vector pointing from the location to the target // Scale to maximum speed desired.setMag(this.maxspeed); // Steering = Desired minus velocity var steer = p5.Vector.sub(desired, this.velocity); steer.limit(this.maxforce); // Limit to maximum steering force return steer; //this.applyForce(steer); } this.dead = function() { return (this.health < 0) } this.display = function() { // Draw a triangle rotated in the direction of velocity var angle = this.velocity.heading() + PI / 2; push(); translate(this.position.x, this.position.y); rotate(angle); // if (debug.checked()) { //strokeWeight(3); //stroke(0, 255, 0); // noFill(); // line(0, 0, 0, -this.dna[0] * 25); // strokeWeight(2); // ellipse(0, 0, this.dna[2] * 2); //stroke(255, 0, 0); // line(0, 0, 0, -this.dna[1] * 25); // ellipse(0, 0, this.dna[3] * 2); // } var gr = color(0, 255, 0); var rd = color(255, 0, 0); var col = lerpColor(rd, gr, this.health); fill(col); stroke(col); strokeWeight(1); beginShape(); vertex(0, -this.r * 2); vertex(-this.r, this.r * 2); vertex(this.r, this.r * 2); endShape(CLOSE); pop(); } this.boundaries = function() { var d = 25; var desired = null; if (this.position.x < d) { desired = createVector(this.maxspeed, this.velocity.y); } else if (this.position.x > width - d) { desired = createVector(-this.maxspeed, this.velocity.y); } if (this.position.y < d) { desired = createVector(this.velocity.x, this.maxspeed); } else if (this.position.y > height - d) { desired = createVector(this.velocity.x, -this.maxspeed); } if (desired !== null) { desired.normalize(); desired.mult(this.maxspeed); var steer = p5.Vector.sub(desired, this.velocity); steer.limit(this.maxforce); this.applyForce(steer); } } }

evolutionary behaviours