[RetSam]

Файл 3:

Мувик main:

onClipEvent (load)
{
	// points of the object the user draws
	points = new Array ();
	// number of lines that make up the shape (used for duplicated names and depths)
	num_lines = 0;
	// current and old position of the mouse
	x = _root._xmouse;
	y = _root._ymouse;
	ox = x;
	oy = y;
	// determines whether the user is clicking and drawing on the screen or not
	drag = 0;
	// determines whether the user is still drawing a shape or not
	done = 0;
	// keeps track of the number of mouse clicks (used to get rid of a small bug)
	click = 0;
}


onClipEvent (mouseDown)
{
	drag = 1;
	click++;
	if (click == 1)
	{
		x = _root._xmouse;
		y = _root._ymouse;
	}
}


onClipEvent (mouseUp)
{
	drag = 0;
	
}


onClipEvent (enterFrame)
{
	if (drag && ! done)
	{
		ox = x;
		oy = y;
		x = _root._xmouse;
		y = _root._ymouse;
		// make a new line and connect the new and old position of the mouse with it
		_root.line.duplicateMovieClip ("line" + num_lines, num_lines);
		_root.draw_line ("line" + num_lines, ox, oy, x, y);
		points[num_lines] = new Array (ox, oy);
		num_lines++;
	}
}


onClipEvent (keyDown)
{
	// calculate area
	if (Key.isDown (65))
	{
		done = 1;
		area = _root.calculate_area (points, num_lines);
		_root.area = "area = " + Math.round (area * 1000) / 1000 + " pixels squared";
		_root.line.duplicateMovieClip ("line" + num_lines, num_lines);
		_root.draw_line ("line" + num_lines, x, y, points[0][0], points[0][1]);
	}

	// get rid of lines and reset variables
	if (Key.isDown (82))
	{
		points = new Array ();
		num_lines = 0;
		x = _root._xmouse;
		y = _root._ymouse;
		ox = x;
		oy = y;
		drag = 0;
		done = 0;
		click = 0;  
		_root.area = "";
		for (j in _root)
		{
			_root[j].removeMovieClip ();
		}
	}
}

Первый кадр:

function calculate_area (p, n)
{
	var area = 0, k;

	for (var j = 0; j < n; j++)
	{
		k = (j + 1) % n;

		area += p[j][0] * p[k][1] - p[j][1] * p[k][0];
	}

	area *= .5;

	return Math.abs (area);
}


function draw_line (mc, x1, y1, x2, y2)
{
	_root[mc]._x = x1;
	_root[mc]._y = y1;
	_root[mc]._xscale = x2 - x1;
	_root[mc]._yscale = y2 - y1;
}



fscommand ("allowscale", false);
stop ();

Файл 1:

Первый кадр:

var tol=20;
var path=[];
var gridStep=10;
_root.ris_mc.onMouseUp=function():Void{
	var dx=_xmouse-path[0].x,dy=_ymouse-path[0].y;
	if(Math.sqrt(dx*dx+dy*dy)<tol){
		delete this.onEnterFrame;
		this.clear();
		this.moveTo(_xmouse,_ymouse);
		this.beginFill(0xFF0000, 50);
		this.lineStyle(0,0xFF0000);
		for(var i=0;i<path.length;i++)this.lineTo(path[i].x,path[i].y);
		this.endFill();
	}
	path.push({x:gridStep*Math.round(_xmouse/gridStep),y:gridStep*Math.round(_ymouse/gridStep)});
}
 _root.ris_mc.onEnterFrame=function():Void{
	//trace(this);
		this.clear();
		this.lineStyle(1);
		this.moveTo(path[0].x,path[0].y);
		for(var i=1;i<path.length;i++)this.lineTo(path[i].x,path[i].y);
		if(path.length) this.lineTo(gridStep*Math.round(_xmouse/gridStep),gridStep*Math.round(_ymouse/gridStep));
}