let plants = []; // Array to store plant objects (green) let herbivores = []; // Array to store herbivore objects (blue) let carnivores = []; // Array to store carnivore objects (red) let arrows = []; // Array to store energy transfer arrows let initialHerbivores; // Store initial number of herbivores let simEnded = false; function setup() { createCanvas(1280, 720); // Create initial populations for(let i = 0; i < 30; i++) { plants.push(new Plant(random(width), random(height))); } for(let i = 0; i < 20; i++) { herbivores.push(new Herbivore(random(width), random(height))); } initialHerbivores = herbivores.length; for(let i = 0; i < 5; i++) { carnivores.push(new Carnivore(random(width), random(height))); } } function draw() { background(220); if (!simEnded) { // Update and display all organisms updateOrganisms(); // Check eating interactions checkInteractions(); // Display arrows for recent interactions displayArrows(); // Check end condition checkEndCondition(); } } class Plant { constructor(x, y) { this.x = x; this.y = y; this.size = 20; } display() { fill(0, 255, 0); circle(this.x, this.y, this.size); } } class Herbivore { constructor(x, y) { this.x = x; this.y = y; this.size = 30; this.speed = 2; this.direction = random(TWO_PI); } move() { this.direction += random(-0.1, 0.1); this.x += cos(this.direction) * this.speed; this.y += sin(this.direction) * this.speed; // Wrap around screen if (this.x < 0) this.x = width; if (this.x > width) this.x = 0; if (this.y < 0) this.y = height; if (this.y > height) this.y = 0; } display() { fill(0, 0, 255); circle(this.x, this.y, this.size); } } class Carnivore { constructor(x, y) { this.x = x; this.y = y; this.size = 40; this.speed = 3; this.direction = random(TWO_PI); } move() { this.direction += random(-0.1, 0.1); this.x += cos(this.direction) * this.speed; this.y += sin(this.direction) * this.speed; // Wrap around screen if (this.x < 0) this.x = width; if (this.x > width) this.x = 0; if (this.y < 0) this.y = height; if (this.y > height) this.y = 0; } display() { fill(255, 0, 0); circle(this.x, this.y, this.size); } } function updateOrganisms() { // Display and update all organisms plants.forEach(plant => plant.display()); herbivores.forEach(herbivore => { herbivore.move(); herbivore.display(); }); carnivores.forEach(carnivore => { carnivore.move(); carnivore.display(); }); } function checkInteractions() { // Check herbivores eating plants for (let i = herbivores.length - 1; i >= 0; i--) { for (let j = plants.length - 1; j >= 0; j--) { let d = dist(herbivores[i].x, herbivores[i].y, plants[j].x, plants[j].y); if (d < herbivores[i].size/2 + plants[j].size/2) { arrows.push({ x1: plants[j].x, y1: plants[j].y, x2: herbivores[i].x, y2: herbivores[i].y, life: 30 }); } } } // Check carnivores eating herbivores for (let i = carnivores.length - 1; i >= 0; i--) { for (let j = herbivores.length - 1; j >= 0; j--) { let d = dist(carnivores[i].x, carnivores[i].y, herbivores[j].x, herbivores[j].y); if (d < carnivores[i].size/2 + herbivores[j].size/2) { herbivores.splice(j, 1); arrows.push({ x1: herbivores[j].x, y1: herbivores[j].y, x2: carnivores[i].x, y2: carnivores[i].y, life: 30 }); } } } } function displayArrows() { // Display and update arrows for (let i = arrows.length - 1; i >= 0; i--) { let arrow = arrows[i]; stroke(0); line(arrow.x1, arrow.y1, arrow.x2, arrow.y2); arrow.life--; if (arrow.life <= 0) { arrows.splice(i, 1); } } } function checkEndCondition() { // End simulation when carnivores consume 70% of initial herbivores if (herbivores.length <= initialHerbivores * 0.3 && !simEnded) { simEnded = true; miniSimEnded(); } }