//Stereogram test #2
//(C) 2004 Haruka Kataoka

JumpPanel jparr[];
float phase = 0.0;
float v = 0.2;

void setup() {
	size(500, 300);
	jparr = new JumpPanel[25];
	for (int y=-2; y<=2; y++) {
		for (int x=-2; x<=2; x++) {
			jparr[5*(y+2)+(x+2)] = new JumpPanel(x*40-20, y*40-20, 40, 40);
		}
	}
	framerate(24);
	background(0, 0, 0);
	fill(0, 0, 80);
	stroke(0, 0, 80);
}

void loop() {
	if (phase <= 0.0) {
		phase = 2 * PI;
		for (int i=0; i<25; i++) {
			jparr[i].reset();
			jparr[i].move(0);
		}
	}else{
		float sn = sin(phase -= v);
		for (int i=0; i<25; i++) {
			jparr[i].move(sn);
		}
	}
	background(0, 0, 0);
	for (int i=0; i<25; i++)
		jparr[i].display();
}

//class Jumping Panel
class JumpPanel {
	int x, y, w, h;
	float z;
	float amplitude;// Anmplitude of  Z  moving
	float distance = 200; //distance from eye
	float parallax = 20.0;//default parallax
	
	//Constructor
	JumpPanel (int ax, int ay, int aw, int ah) {
		x = ax;
		y = ay;
		w = aw;
		h = ah;
		reset();
	}
	
	//Reset Amplitude
	void reset() {
		amplitude = random(-100, 100);
	}
	
	//set z   (k = [-1.0 , 1.0])
	void move(float k) {
		z = k * amplitude;
	}
	
	//display
	void display() {
		float r = distance / (distance+z);//display size rate
		//display x, y, w, h and parallax
		int dw = (int)(w * r);
		int dh = (int)(h * r);
		int dx = (int)((x - (dw-w)/2) * r);
		int dy = (int)((y - (dh-h)/2) * r);
		int dp = (int)((parallax * r - parallax)/2.0);
		rect(dx+150+dp, dy+150, dw, dh);// left image
		rect(dx+350-dp, dy+150, dw, dh);// right image
	}
}