=== File http://localhost/subjectPrograms/ClientSideOnly/ball_pool/js/Main.js ===
var canvas;

>>>  var delta = [ 0, 0 ];
>>>  var stage = [ window.screenX, window.screenY, window.innerWidth, window.innerHeight ];
>>>  getBrowserDimensions();

>>>  var themes = [ [ "#10222B", "#95AB63", "#BDD684", "#E2F0D6", "#F6FFE0" ],
		[ "#362C2A", "#732420", "#BF734C", "#FAD9A0", "#736859" ],
		[ "#0D1114", "#102C2E", "#695F4C", "#EBBC5E", "#FFFBB8" ],
		[ "#2E2F38", "#FFD63E", "#FFB54B", "#E88638", "#8A221C" ],
		[ "#121212", "#E6F2DA", "#C9F24B", "#4D7B85", "#23383D" ],
		[ "#343F40", "#736751", "#F2D7B6", "#BFAC95", "#8C3F3F" ],
		[ "#000000", "#2D2B2A", "#561812", "#B81111", "#FFFFFF" ],
		[ "#333B3A", "#B4BD51", "#543B38", "#61594D", "#B8925A" ] ];
var theme;

>>>  var worldAABB, world, iterations = 1, timeStep = 1 / 20;

>>>  var walls = [];
>>>  var wall_thickness = 200;
>>>  var wallsSetted = false;

var bodies, elements, text;

>>>  var createMode = false;
>>>  var destroyMode = false;

>>>  var isMouseDown = false;
var mouseJoint;
>>>  var mouseX = 0;
>>>  var mouseY = 0;

>>>  var PI2 = Math.PI * 2;

>>>  var timeOfLastTouch = 0;

>>>  init();
>>>  play();

>>>  function init() {

>>>  	canvas = document.getElementById( 'canvas' );

>>>  	document.onmousedown = onDocumentMouseDown;
>>>  	document.onmouseup = onDocumentMouseUp;
>>>  	document.onmousemove = onDocumentMouseMove;
>>>  	document.ondblclick = onDocumentDoubleClick;

>>>  	document.addEventListener( 'touchstart', onDocumentTouchStart, false );
>>>  	document.addEventListener( 'touchmove', onDocumentTouchMove, false );
>>>  	document.addEventListener( 'touchend', onDocumentTouchEnd, false );

	// init box2d

>>>  	worldAABB = new b2AABB();
>>>  	worldAABB.minVertex.Set( -200, -200 );
>>>  	worldAABB.maxVertex.Set( screen.width + 200, screen.height + 200 );

>>>  	world = new b2World( worldAABB, new b2Vec2( 0, 0 ), true );

>>>  	setWalls();
>>>  	reset();
}


>>>  function play() {

>>>  	setInterval( loop, 1000 / 40 );
}

>>>  function reset() {

	var i;

>>>  	if ( bodies ) {

>>>  		for ( i = 0; i < bodies.length; i++ ) {

>>>  			var body = bodies[ i ]
>>>  			canvas.removeChild( body.GetUserData().element );
>>>  			world.DestroyBody( body );
>>>  			body = null;
		}
	}

	// color theme
>>>  	theme = themes[ Math.random() * themes.length >> 0 ];
>>>  	document.body.style[ 'backgroundColor' ] = theme[ 0 ];

>>>  	bodies = [];
>>>  	elements = [];

>>>  	createInstructions();

>>>  	for( i = 0; i < 10; i++ ) {

>>>  		createBall();

	}

}

//

>>>  function onDocumentMouseDown() {

>>>  	isMouseDown = true;
>>>  	return false;
}

>>>  function onDocumentMouseUp() {

>>>  	isMouseDown = false;
>>>  	return false;
}

>>>  function onDocumentMouseMove( event ) {

>>>  	mouseX = event.clientX;
>>>  	mouseY = event.clientY;
}

>>>  function onDocumentDoubleClick() {

>>>  	reset();
}

>>>  function onDocumentTouchStart( event ) {

>>>  	if( event.touches.length == 1 ) {

>>>  		event.preventDefault();

		// Faking double click for touch devices

>>>  		var now = new Date().getTime();

>>>  		if ( now - timeOfLastTouch  < 250 ) {

>>>  			reset();
>>>  			return;
		}

>>>  		timeOfLastTouch = now;

>>>  		mouseX = event.touches[ 0 ].pageX;
>>>  		mouseY = event.touches[ 0 ].pageY;
>>>  		isMouseDown = true;
	}
}

>>>  function onDocumentTouchMove( event ) {

>>>  	if ( event.touches.length == 1 ) {

>>>  		event.preventDefault();

>>>  		mouseX = event.touches[ 0 ].pageX;
>>>  		mouseY = event.touches[ 0 ].pageY;

	}

}

>>>  function onDocumentTouchEnd( event ) {

>>>  	if ( event.touches.length == 0 ) {

---  		event.preventDefault();
---  		isMouseDown = false;

	}

}

//

>>>  function createInstructions() {

>>>  	var size = 250;

>>>  	var element = document.createElement( 'div' );
>>>  	element.width = size;
>>>  	element.height = size;	
>>>  	element.style.position = 'absolute';
>>>  	element.style.left = -200 + 'px';
>>>  	element.style.top = -200 + 'px';
>>>  	element.style.cursor = "default";

>>>  	canvas.appendChild(element);
>>>  	elements.push( element );

>>>  	var circle = document.createElement( 'canvas' );
>>>  	circle.width = size;
>>>  	circle.height = size;

>>>  	var graphics = circle.getContext( '2d' );

>>>  	graphics.fillStyle = theme[ 3 ];
>>>  	graphics.beginPath();
>>>  	graphics.arc( size * .5, size * .5, size * .5, 0, PI2, true );
>>>  	graphics.closePath();
>>>  	graphics.fill();

>>>  	element.appendChild( circle );

>>>  	text = document.createElement( 'div' );
>>>  	text.onSelectStart = null;
>>>  	text.innerHTML = '<span style="color:' + theme[0] + ';font-size:40px;">Hello!</span><br /><br /><span style="font-size:15px;"><strong>This is how it works:</strong><br /><br />1. Drag a ball.<br />2.&nbsp;Click&nbsp;on&nbsp;the&nbsp;background.<br />3. Shake your browser.<br />4. Double click.<br />5. Play!</span>';
>>>  	text.style.color = theme[1];
>>>  	text.style.position = 'absolute';
>>>  	text.style.left = '0px';
>>>  	text.style.top = '0px';
>>>  	text.style.fontFamily = 'Georgia';
>>>  	text.style.textAlign = 'center';
>>>  	element.appendChild(text);

>>>  	text.style.left = ((250 - text.clientWidth) / 2) +'px';
>>>  	text.style.top = ((250 - text.clientHeight) / 2) +'px';	

>>>  	var b2body = new b2BodyDef();

>>>  	var circle = new b2CircleDef();
>>>  	circle.radius = size / 2;
>>>  	circle.density = 1;
>>>  	circle.friction = 0.3;
>>>  	circle.restitution = 0.3;
>>>  	b2body.AddShape(circle);
>>>  	b2body.userData = {element: element};

>>>  	b2body.position.Set( Math.random() * stage[2], Math.random() * -200 );
>>>  	b2body.linearVelocity.Set( Math.random() * 400 - 200, Math.random() * 400 - 200 );
>>>  	bodies.push( world.CreateBody(b2body) );	
}

>>>  function createBall( x, y ) {

>>>  	var x = x || Math.random() * stage[2];
>>>  	var y = y || Math.random() * -200;

>>>  	var size = (Math.random() * 100 >> 0) + 20;

>>>  	var element = document.createElement("canvas");
>>>  	element.width = size;
>>>  	element.height = size;
>>>  	element.style['position'] = 'absolute';
>>>  	element.style['left'] = -200 + 'px';
>>>  	element.style['top'] = -200 + 'px';

>>>  	var graphics = element.getContext("2d");

>>>  	var num_circles = Math.random() * 10 >> 0;

>>>  	for (var i = size; i > 0; i-= (size/num_circles)) {

>>>  		graphics.fillStyle = theme[ (Math.random() * 4 >> 0) + 1];
>>>  		graphics.beginPath();
>>>  		graphics.arc(size * .5, size * .5, i * .5, 0, PI2, true); 
>>>  		graphics.closePath();
>>>  		graphics.fill();
	}

>>>  	canvas.appendChild(element);

>>>  	elements.push( element );

>>>  	var b2body = new b2BodyDef();

>>>  	var circle = new b2CircleDef();
>>>  	circle.radius = size >> 1;
>>>  	circle.density = 1;
>>>  	circle.friction = 0.3;
>>>  	circle.restitution = 0.3;
>>>  	b2body.AddShape(circle);
>>>  	b2body.userData = {element: element};

>>>  	b2body.position.Set( x, y );
>>>  	b2body.linearVelocity.Set( Math.random() * 400 - 200, Math.random() * 400 - 200 );
>>>  	bodies.push( world.CreateBody(b2body) );
}

//

>>>  function loop() {

>>>  	if (getBrowserDimensions()) {

---  		setWalls();

	}

>>>  	delta[0] += (0 - delta[0]) * .5;
>>>  	delta[1] += (0 - delta[1]) * .5;

>>>  	world.m_gravity.x = 0 + delta[0];
>>>  	world.m_gravity.y = 350 + delta[1];

>>>  	mouseDrag();
>>>  	world.Step(timeStep, iterations);

>>>  	for (i = 0; i < bodies.length; i++) {

>>>  		var body = bodies[i];
>>>  		var element = elements[i];

>>>  		element.style.left = (body.m_position0.x - (element.width >> 1)) + 'px';
>>>  		element.style.top = (body.m_position0.y - (element.height >> 1)) + 'px';

>>>  		if (element.tagName == 'DIV') {

>>>  			var rotationStyle = 'rotate(' + (body.m_rotation0 * 57.2957795) + 'deg)';
>>>  			text.style.WebkitTransform = rotationStyle;
>>>  			text.style.MozTransform = rotationStyle;
>>>  			text.style.OTransform = rotationStyle;

		}

	}

}


// .. BOX2D UTILS

>>>  function createBox(world, x, y, width, height, fixed) {

>>>  	if (typeof(fixed) == 'undefined') {

>>>  		fixed = true;

	}

>>>  	var boxSd = new b2BoxDef();

>>>  	if (!fixed) {

---  		boxSd.density = 1.0;

	}

>>>  	boxSd.extents.Set(width, height);

>>>  	var boxBd = new b2BodyDef();
>>>  	boxBd.AddShape(boxSd);
>>>  	boxBd.position.Set(x,y);

>>>  	return world.CreateBody(boxBd);

}

function mouseDrag()
>>>  {
	// mouse press
>>>  	if (createMode) {

>>>  		createBall( mouseX, mouseY );

>>>  	} else if (isMouseDown && !mouseJoint) {

>>>  		var body = getBodyAtMouse();

>>>  		if (body) {

>>>  			var md = new b2MouseJointDef();
>>>  			md.body1 = world.m_groundBody;
>>>  			md.body2 = body;
>>>  			md.target.Set(mouseX, mouseY);
>>>  			md.maxForce = 30000 * body.m_mass;
>>>  			md.timeStep = timeStep;
>>>  			mouseJoint = world.CreateJoint(md);
>>>  			body.WakeUp();

>>>  		} else {

>>>  			createMode = true;

		}

	}

	// mouse release
>>>  	if (!isMouseDown) {

>>>  		createMode = false;
>>>  		destroyMode = false;

>>>  		if (mouseJoint) {

---  			world.DestroyJoint(mouseJoint);
---  			mouseJoint = null;

		}

	}

	// mouse move
>>>  	if (mouseJoint) {

>>>  		var p2 = new b2Vec2(mouseX, mouseY);
>>>  		mouseJoint.SetTarget(p2);
	}
}

>>>  function getBodyAtMouse() {

	// Make a small box.
>>>  	var mousePVec = new b2Vec2();
>>>  	mousePVec.Set(mouseX, mouseY);

>>>  	var aabb = new b2AABB();
>>>  	aabb.minVertex.Set(mouseX - 1, mouseY - 1);
>>>  	aabb.maxVertex.Set(mouseX + 1, mouseY + 1);

	// Query the world for overlapping shapes.
>>>  	var k_maxCount = 10;
>>>  	var shapes = new Array();
>>>  	var count = world.Query(aabb, shapes, k_maxCount);
>>>  	var body = null;

>>>  	for (var i = 0; i < count; ++i) {

>>>  		if (shapes[i].m_body.IsStatic() == false) {

>>>  			if ( shapes[i].TestPoint(mousePVec) ) {

>>>  				body = shapes[i].m_body;
				break;

			}

		}

	}

>>>  	return body;

}

>>>  function setWalls() {

>>>  	if (wallsSetted) {

---  		world.DestroyBody(walls[0]);
---  		world.DestroyBody(walls[1]);
---  		world.DestroyBody(walls[2]);
---  		world.DestroyBody(walls[3]);

---  		walls[0] = null; 
---  		walls[1] = null;
---  		walls[2] = null;
---  		walls[3] = null;
	}

>>>  	walls[0] = createBox(world, stage[2] / 2, - wall_thickness, stage[2], wall_thickness);
>>>  	walls[1] = createBox(world, stage[2] / 2, stage[3] + wall_thickness, stage[2], wall_thickness);
>>>  	walls[2] = createBox(world, - wall_thickness, stage[3] / 2, wall_thickness, stage[3]);
>>>  	walls[3] = createBox(world, stage[2] + wall_thickness, stage[3] / 2, wall_thickness, stage[3]);	

>>>  	wallsSetted = true;

}

// BROWSER DIMENSIONS

>>>  function getBrowserDimensions() {

>>>  	var changed = false;

>>>  	if (stage[0] != window.screenX) {

---  		delta[0] = (window.screenX - stage[0]) * 50;
---  		stage[0] = window.screenX;
---  		changed = true;

	}

>>>  	if (stage[1] != window.screenY) {

---  		delta[1] = (window.screenY - stage[1]) * 50;
---  		stage[1] = window.screenY;
---  		changed = true;

	}

>>>  	if (stage[2] != window.innerWidth) {

---  		stage[2] = window.innerWidth;
---  		changed = true;

	}

>>>  	if (stage[3] != window.innerHeight) {

---  		stage[3] = window.innerHeight;
---  		changed = true;

	}

>>>  	return changed;

}
Total lines (including un-executable): 502
Total executable lines: 256
Covered lines: 232
Coverage: ~90%
Errors:0 errors/warningsh in the script: