svitoora-Project-11- Petri Dish

Petri Dish

// 
// Supawat Vitoorapakorn
// Svitoora@andrew.cmu.edu
// Section E
// Petri Dish

// Create Node
function makeTurtle(tx, ty) {
	var turtle = {
		x: tx,
		y: ty,
		life_index: random(-.5, .5) //random seem for bug bheavior
	};
	return turtle;
}

var time = 1; // Time variable
var w = 480;
var h = 480;
var turtles = []

function setup() {
	createCanvas(w, h);
	background(255);
	num_node = 15;
	for (i = 0; i < num_node; i++) {
		t = makeTurtle(random(0, w), random(0, h));
		turtles.push(t);
	}
}

// Ease turtles towards mouse
function turtle_move() {
	speed = .045;
	for (i in turtles) {
		if (turtles[i].x < mouseX) {
			dx = abs(turtles[i].x - mouseX)
			turtles[i].x += dx * speed
		} else {
			dx = abs(turtles[i].x - mouseX)
			turtles[i].x -= dx * speed
		}
		if (turtles[i].y < mouseY) {
			dy = abs(turtles[i].y - mouseY)
			turtles[i].y += dy * speed
		} else {
			dy = abs(turtles[i].y - mouseY)
			turtles[i].y -= dy * speed
		}
	}
}

// Add Perlin noise to movement of turtle
function add_life() {
	if (mouseIsPressed == false) {
		SIZE = 10; //magnitude of noise movement add
	} else {
		SIZE = 30;
	}
	for (i in turtles) {
		life = turtles[i].life_index
		turtles[i].x += (noise(time * life) - .5) * SIZE;
		turtles[i].y += (noise(time * life / 2) - .5) * SIZE;
	}
}

// Draws membrane of turtles
function membrane() {
	strokeWeight(1);
	fill(0, 0, 0, 255 * .1);
	beginShape(TRIANGLE_STRIP);
	for (i in turtles) {
		x = turtles[i].x
		y = turtles[i].y
		curveVertex(x, y);
	}
	endShape(CLOSE);
}

// Connect lines
function connect_lines() {
	stroke(0, 0, 0, 255 * .25)
	for (i in turtles) {
		x_0 = turtles[i].x
		y_0 = turtles[i].y
		for (i in turtles) {
			x_1 = turtles[i].x
			y_1 = turtles[i].y
			line(x_0, y_0, x_1, y_1);
		}
	}
}

function draw() {
	time += .1;
	background(255, 255, 255, 255 * .75);
	turtle_move();
	add_life()
	for (i in turtles) {
		fill(0, 0, 0, 255 * .75);
		ellipse(turtles[i].x, turtles[i].y, 10, 10)
	}
	membrane();
	connect_lines();
}

This is my first time playing with the noise() function and I absolutely love it! Try clicking and moving your mouse around the canvas. I wanted to create a digital petri dish inspired by seeing Euglena protist under the microscope:

 

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