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    <p>Please try the following code. It is not ideal, but it can probably give you some idea.</p> <pre><code>package { import flash.display.Sprite; import flash.events.Event; import flash.events.MouseEvent; import flash.geom.Point; public class CurvedLineTest extends Sprite { private static const DRAW_STEP:Number = 2; private var curveWidth:Number; private var curvePeriod:Number; private var smoothing:Number; private var prevPos:Point = new Point(); private var curveLength:Number; private var smoothedN:Point = new Point(); public function CurvedLineTest(curveWidth:Number = 10, curvePeriod:Number = 15, smoothFactor:Number = 80) { this.curveWidth = curveWidth; this.curvePeriod = curvePeriod; this.smoothing = Math.min(Math.max(smoothFactor, 0), 100) / 100; if( stage ) { onAddedToStage(); } else addEventListener(Event.ADDED_TO_STAGE, onAddedToStage); // test: simulating fast mouse movements moveToPoint(10, 10); drawToPoint(15, 15); drawToPoint(35, 35); drawToPoint(60, 90); drawToPoint(150, 190); drawToPoint(350, 300); } private function onAddedToStage(e:Event = null):void { removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage); stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown); stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp); addEventListener(Event.REMOVED_FROM_STAGE, onRemovedFromStage); } private function onRemovedFromStage(e:Event):void { removeEventListener(Event.REMOVED_FROM_STAGE, onRemovedFromStage); stage.removeEventListener(MouseEvent.MOUSE_DOWN, onMouseDown); stage.removeEventListener(MouseEvent.MOUSE_UP, onMouseUp); addEventListener(Event.ADDED_TO_STAGE, onAddedToStage); } private function onMouseDown(e:MouseEvent):void { moveToPoint(mouseX, mouseY); stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove); } private function onMouseMove(e:MouseEvent):void { drawToPoint(mouseX, mouseY); e.updateAfterEvent(); } private function moveToPoint(x:Number, y:Number):void { prevPos.x = x; prevPos.y = y; curveLength = 0; graphics.moveTo(x, y); } private function drawToPoint(x:Number, y:Number):void { // displacement vector var d:Point = new Point(x - prevPos.x, y - prevPos.y); // length of displacement vector var dl:Number = Math.sqrt(d.x * d.x + d.y * d.y); // normalized displacement vector var nd:Point = new Point(d.x / dl, d.y / dl); // normal to the displacement vector var cn:Point = normal(nd); var currentDl:Number = DRAW_STEP; while( currentDl &lt;= dl ) { // incrementing base curve length by the length of the step displacement curveLength += DRAW_STEP; // base curve coords of the current step var stepX:Number = prevPos.x + nd.x * DRAW_STEP; var stepY:Number = prevPos.y + nd.y * DRAW_STEP; // smoothing the normal to prevent ragged lines smoothedN.x = smoothing * smoothedN.x + (1 - smoothing) * cn.x; smoothedN.y = smoothing * smoothedN.y + (1 - smoothing) * cn.y; // wave form var wave:Number = curveWidth * Math.sin(Math.PI * curveLength / curvePeriod); // adding normal component to the current point of base curve var wavedX:Number = stepX + wave * smoothedN.x; var wavedY:Number = stepY + wave * smoothedN.y; // drawing waved curve graphics.lineStyle(1.5, 0); graphics.lineTo(wavedX, wavedY); // drawing base curve graphics.lineStyle(0, 0xBB2233, 0.5); graphics.moveTo(prevPos.x, prevPos.y); graphics.lineTo(stepX, stepY); // drawing normal graphics.lineStyle(0, 0x3322BB, 0.2); graphics.moveTo(prevPos.x, prevPos.y); graphics.lineTo(stepX + wave * smoothedN.x, stepY + wave * smoothedN.y); graphics.moveTo(wavedX, wavedY); // remembering current base curve point prevPos.x = stepX; prevPos.y = stepY; currentDl += DRAW_STEP; } } /** * Calculates normal to the given vector (in clockwise direction). */ private function normal(vec:Point):Point { var d:Number = Math.sqrt(vec.x * vec.x + vec.y * vec.y); return new Point(-vec.y / d, vec.x / d); } private function onMouseUp(e:MouseEvent):void { graphics.clear(); stage.removeEventListener(MouseEvent.MOUSE_MOVE, onMouseMove); } } } </code></pre>
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    1. COHi - how would I use this class? I am trying to use it the same way I was with my last one, but it extended UIComponent. I get the error "Could not resolve <CurvedLineTest> to a component implementation" when I add <CurvedLineTest id="CLT" width="100%" height="100%"/> to my MXML source. Sorry, but I am still very new to Flex!
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    2. CONevermind - got it working! Thanks for your help - it output exactly what I needed!
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    3. COJust replace `extends Sprite` with `extends UIComponent` :) You may also want to convert constructor arguments into public properties to be able to set them directly in mxml tag: `<local:CurvedLineComp id="comp" curveWidth="20" curvePeriod="20" />`
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