// developed by jinni of moonfun studio
// email: jinni___@hotmail.com


var start,end,center;
var isValidDrag;
var step=0;
var laps;


function init() 
{
    laps = theTool.laps;
    if(laps>10)
     laps=theTool.laps=10;
    if(laps<1)
     laps=theTool.laps=1;
}    

function configureTool()
{

	theTool = fl.tools.activeTool;
	theTool.setToolName("Spiral");
	theTool.setIcon("Spiral.png");
	theTool.setMenuString("Spiral");
	theTool.setToolTip("Spiral by jinni");
	theTool.setOptionsFile( "Spiral.xml" );	
	init();	
}


function notifySettingsChanged()   
{      
	theTool = fl.tools.activeTool;
        init();
}

function activate()
{
  	theTool = fl.tools.activeTool;
}

function deactivate()
{

}


function mouseDown()
{
    
	var startX = fl.tools.penLoc.x;
	var startY = fl.tools.penLoc.y;
	start = {x:startX,y:startY};

	fl.drawingLayer.beginDraw();

	isValidDrag=false;
}


function mouseMove()
{
  var r=0;
  var t=0;

     if(fl.tools.mouseIsDown)
     {
        var w = fl.tools.penLoc.x-fl.tools.penDownLoc.x;
	var h = fl.tools.penLoc.y-fl.tools.penDownLoc.y; 
        var endX = start.x+w;
        var endY = start.y+h;
        end = {x:endX,y:endY};
        center = {x:(start.x+end.x)/2,y:(start.y+end.y)/2};
        step = (w+h)/200;

        if(w>=5&&h>=5)
         {
            isValidDrag = true; 
            } 

	fl.drawingLayer.beginFrame();
	fl.drawingLayer.moveTo(center.x,center.y);
	
        for(t=0;t<laps*2*Math.PI;t+=0.1)
        {
        fl.drawingLayer.lineTo(center.x-r*Math.cos(t),center.y+r*Math.sin(t));
	 r+=step;
         }

	fl.drawingLayer.endFrame();
      }
}

function mouseUp()
{
 var r = 0;
 var t = 0;
 var cx,cy,lx,ly;
 
 fl.drawingLayer.endDraw();

 lx = center.x;
 ly = center.y;
 cx = center.x-r*Math.cos(t);
 cy = center.y+r*Math.sin(t);

 if(isValidDrag)
  {   
  for(t=0;t<laps*2*Math.PI;t+=0.1)
  {
    fl.getDocumentDOM().addNewLine({x:lx, y:ly}, {x:cx, y:cy});    
    // fl.trace(lx+" "+ly+" "+cx+" "+cy+" "+step);
    lx = cx;
    ly = cy;  
    cx = center.x-r*Math.cos(t);
    cy = center.y+r*Math.sin(t);
    r += step;
      }

   }

}