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Current Path : /home/caballoscriollos/www/espanol/encuesta/graphs/sourcecode/funnel/
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Current File : /home/caballoscriollos/www/espanol/encuesta/graphs/sourcecode/funnel/funnel_wedge.as

// --- Funnel_Wedge.as --- //
// Copyright 2005 InfoSoft Global Private Ltd. and its licensors.  All Rights Reserved.
//
// Use and/or redistribution of this file, in whole or in part, is subject
// to the License Files, which was distributed with this component.
//
//--------------------------------------------------------------------------------
/*
Extended function definitions

This file contains extensions to the base MovieClip Object.
All the functions contained in this file can be used with any other Flash MX/+ movie for common procedures
*/
/*-------------------------------------------------------------
	mc.drawFunnelWedge is a method for drawing pie shaped
	wedges. 
-------------------------------------------------------------*/
MovieClip.prototype.drawFunnelWedge = function(x, y, startAngle, arc, radius, yRadius) {
	// ==============
	// x, y = center point of the wedge.
	// startAngle = starting angle in degrees.
	// arc = sweep of the wedge. Negative values draw clockwise.
	// radius = radius of wedge. If [optional] yRadius is defined, then radius is the x radius.
	// yRadius = [optional] y radius for wedge.
	// if yRadius is undefined, yRadius = radius
	if (yRadius == undefined) {
		yRadius = radius;
	}
	// Init vars
	var segAngle, theta, angle, angleMid, segs, ax, ay, bx, by, cx, cy;
	// limit sweep to reasonable numbers
	if (Math.abs(arc)>360) {
		arc = 360;
	}
	// Flash uses 8 segments per circle, to match that, we draw in a maximum
	// of 45 degree segments. First we calculate how many segments are needed
	// for our arc.
	segs = Math.ceil(Math.abs(arc)/45);
	// Now calculate the sweep of each segment.
	segAngle = arc/segs;
	// The math requires radians rather than degrees. To convert from degrees
	// use the formula (degrees/180)*Math.PI to get radians.
	theta = -(segAngle/180)*Math.PI;
	// convert angle startAngle to radians
	angle = -(startAngle/180)*Math.PI;
	// draw the curve in segments no larger than 45 degrees.
	if (segs>0) {
		// draw a line from the center to the start of the curve
		ax = x+Math.cos(startAngle/180*Math.PI)*radius;
		ay = y+Math.sin(-startAngle/180*Math.PI)*yRadius;
		// Loop for drawing curve segments
		for (var i = 0; i<segs; i++) {
			angle += theta;
			angleMid = angle-(theta/2);
			bx = x+Math.cos(angle)*radius;
			by = y+Math.sin(angle)*yRadius;
			cx = x+Math.cos(angleMid)*(radius/Math.cos(theta/2));
			cy = y+Math.sin(angleMid)*(yRadius/Math.cos(theta/2));
			this.curveTo(cx, cy, bx, by);
		}
	}
};

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