Composite Objects
An object can include several other objects. Creating such composite objects is a good way to use the principles of modularity and build higher levels of abstraction within a program.
Highlighted Features
/** * Composite Objects * * An object can include several other objects. Creating such composite objects * is a good way to use the principles of modularity and build higher levels of * abstraction within a program. */ EggRing er1, er2; void setup() { size(640, 360); er1 = new EggRing(width*0.45, height*0.5, 2, 120); er2 = new EggRing(width*0.65, height*0.8, 10, 180); } void draw() { background(0); er1.transmit(); er2.transmit(); }class Egg { float x, y; // X-coordinate, y-coordinate float tilt; // Left and right angle offset float angle; // Used to define the tilt float scalar; // Height of the egg float range; // Constructor Egg(float xpos, float ypos, float r, float s) { x = xpos; y = ypos; tilt = 0; scalar = s / 100.0; range = r; } void wobble() { tilt = cos(angle) / range; angle += 0.1; //print (angle + "-"); } void display() { noStroke(); fill(255); pushMatrix(); translate(x, y); rotate(tilt); scale(scalar); beginShape(); vertex(0, -100); bezierVertex(25, -100, 40, -65, 40, -40); bezierVertex(40, -15, 25, 0, 0, 0); bezierVertex(-25, 0, -40, -15, -40, -40); bezierVertex(-40, -65, -25, -100, 0, -100); endShape(); popMatrix(); } }class EggRing { Egg ovoid; Ring circle = new Ring(); EggRing(float x, float y, float t, float sp) { ovoid = new Egg(x, y, t, sp); circle.start(x, y - sp/2); } void transmit() { ovoid.wobble(); ovoid.display(); circle.grow(); circle.display(); if (circle.on == false) { circle.on = true; } } } class Ring { float x, y; // X-coordinate, y-coordinate float diameter; // Diameter of the ring boolean on = false; // Turns the display on and off void start(float xpos, float ypos) { x = xpos; y = ypos; on = true; diameter = 1; } void grow() { if (on == true) { diameter += 0.5; if (diameter > width*2) { diameter = 0.0; } } } void display() { if (on == true) { noFill(); strokeWeight(4); stroke(155, 153); ellipse(x, y, diameter, diameter); } } } Related Examples
This example is for Processing 4+. If you have a previous version, use the examples included with your software. If you see any errors or have suggestions, please let us know.