Docs 0.11.0

#pragma once

#define BOUNCE_FACTOR			0.5
#define ACCELEROMETER_FORCE		0.2
#define RADIUS					30


class Ball {
public:
	ofPoint pos;
	ofPoint vel;
	ofColor col;
	bool touched;
	
	void init() {
		pos.set(ofRandomWidth(), ofRandomHeight(), 0);
		vel.set(ofRandomf(), ofRandomf(), 0);
		
		col.r = ofRandom(0, 255);
		col.g = ofRandom(0, 255);
		col.b = ofRandom(0, 255);
		col.a = ofRandom(0, 255);
		touched = false;
	}
	

	void update() {
		if(!touched){
			vel.x += ACCELEROMETER_FORCE * ofxAccelerometer.getForce().x * ofRandomuf();
			vel.y += -ACCELEROMETER_FORCE * ofxAccelerometer.getForce().y * ofRandomuf();        // this one is subtracted cos world Y is opposite to opengl Y

			// add vel to pos
			pos += vel;

			// check boundaries
			if(pos.x < RADIUS) {
				pos.x = RADIUS;
				vel.x *= -BOUNCE_FACTOR;
			} else if(pos.x >= ofGetWidth() - RADIUS) {
				pos.x = ofGetWidth() - RADIUS;
				vel.x *= -BOUNCE_FACTOR;
			}

			if(pos.y < RADIUS) {
				pos.y = RADIUS;
				vel.y *= -BOUNCE_FACTOR;
			} else if(pos.y >= ofGetHeight() - RADIUS) {
				pos.y = ofGetHeight() - RADIUS;
				vel.y *= -BOUNCE_FACTOR;
			}
		}
	}
	
	void draw() {
		ofSetColor(col.r, col.g, col.b, col.a);
		ofCircle(pos.x, pos.y, 30);
	}
	
	void moveTo(int x, int y) {
		pos.set(x, y, 0);
		vel.set(0, 0, 0);
	}
};