sin cos tan

by KBM 20 May 2013

Embed

package {
    import flash.filters.GlowFilter;
    import flash.text.TextFieldAutoSize;
    import flash.text.TextField;
    import flash.events.Event;
    import flash.geom.ColorTransform;
    import flash.events.MouseEvent;
    import flash.display.Shape;
    import flash.display.Graphics;
    import flash.display.Sprite;
    public class Main extends Sprite {
        public function Main() {
            // write as3 code here..
            
            var unitCircle:Sprite = new Sprite();
            var unitCircleGraph:Graphics = unitCircle.graphics;
            unitCircleGraph.lineStyle(0);
            unitCircleGraph.drawCircle(stage.stageWidth/2,stage.stageHeight/2,stage.stageWidth / 2 - 50);
            addChild(unitCircle);
            
            var axis:Shape = new Shape();
            var axisGraph:Graphics = axis.graphics;
            axisGraph.lineStyle(0);
            axisGraph.moveTo(0,stage.stageHeight/2);
            axisGraph.lineTo(stage.stageWidth,stage.stageHeight/2);
            axisGraph.moveTo(stage.stageWidth/2,0);
            axisGraph.lineTo(stage.stageWidth/2,stage.stageHeight);
            addChild(axis);
            
            var refPoint:Sprite = new Sprite();
            var refPointGraph:Graphics = refPoint.graphics;
            refPointGraph.beginFill(0x0);
            refPointGraph.drawCircle(0,0,7);
            refPoint.x = stage.stageWidth/2 + Math.cos(-1) * unitCircle.width/2;
            refPoint.y = stage.stageHeight/2 + Math.sin(-1) * unitCircle.height/2;
            refPointGraph.endFill();
            addChild(refPoint);
            
            var redTrans:ColorTransform = new ColorTransform(0,0,0,1,225,0,0,0);
            var blackTrans:ColorTransform = new ColorTransform(0,0,0,1,0,0,0,0);
            
            refPoint.buttonMode = true;
            var onMouseOver:Boolean = false;
            refPoint.addEventListener(MouseEvent.MOUSE_OVER,function ():void{
                onMouseOver = true;})
            refPoint.addEventListener(MouseEvent.MOUSE_OUT,function ():void{
                onMouseOver = false;});
                
                
            var dragging:Boolean = false;
            refPoint.addEventListener(MouseEvent.MOUSE_DOWN,function():void{
                dragging = true;}) 
            stage.addEventListener(MouseEvent.MOUSE_UP,function():void{
                dragging = false;})
            
            
            addEventListener(Event.ENTER_FRAME,enterFrame);
            function enterFrame(e:Event):void{
                if(dragging || onMouseOver) {refPoint.transform.colorTransform = redTrans; refPoint.filters = 
                [new GlowFilter()]}
                else {refPoint.transform.colorTransform = blackTrans; refPoint.filters = []}
                moveRefPoint();
                adjustLines();
                setText();
            }
            
            
            var toMouseRad:Number = 0;
            var hitRange:int = 50;
            var refCoordinate:Point = new Point(refPoint.x + 7, refPoint.y + 7);
            function moveRefPoint():void{
                                
                if(dragging && mouseX > 0 && mouseX < stage.stageWidth && mouseY > 0 && mouseY < stage.stageWidth){
                    refCoordinate = new Point(refPoint.x + 7, refPoint.y + 7);
                    toMouseRad = Math.atan2(mouseY - stage.stageHeight/2,mouseX - stage.stageWidth/2);
                    refPoint.x = Math.cos(toMouseRad) * (stage.stageWidth / 2 - 50) + stage.stageWidth/2;
                    refPoint.y = Math.sin(toMouseRad) * (stage.stageWidth / 2 - 50) + stage.stageHeight/2;
                }
                else dragging = false;
            }
            
            var sinLine:Sprite = new Sprite();
            var cosLine:Sprite = new Sprite();
            var radiusLine:Sprite = new Sprite();
            addChildAt(radiusLine,1)
            addChildAt(sinLine,2);
            addChild(cosLine);
            
            function drawLine(sp:Sprite,x1:int,y1:int,x2:int,y2:int,color:uint):void{
                sp.graphics.clear();
                sp.graphics.lineStyle(3,color);
                sp.graphics.moveTo(x1,y1);
                sp.graphics.lineTo(x2,y2);
            }

            
            function adjustLines():void{
                drawLine(sinLine,refPoint.x,stage.stageHeight/2,refPoint.x,refPoint.y,0x00DD00);
                drawLine(cosLine,stage.stageWidth/2,stage.stageHeight/2,refPoint.x,stage.stageHeight/2,0xDD0000);
                drawLine(radiusLine,stage.stageWidth/2,stage.stageHeight/2,refPoint.x,refPoint.y,0xFFAA00);
            }
            
            var sintext:TextField = new TextField();
            var costext:TextField = new TextField();
            var tantext:TextField = new TextField();
            var theta:TextField = new TextField();
            sintext.selectable = costext.selectable = tantext.selectable = theta.selectable = false;
            costext.y = 15;
            tantext.y = 30;
            theta.y = 45;
            addChild(sintext); addChild(costext); addChild(tantext); addChild(theta);
            
            var autotext:String = TextFieldAutoSize.LEFT
            function setText():void{
                tantext.text = "tanθ = " + 
                String(Math.floor((stage.stageHeight/2 - refPoint.y) / (refPoint.x - stage.stageWidth/2) * 10000) / 10000);
                tantext.autoSize = autotext;
                
                sintext.text = "sinθ = " +
                 - Math.floor((refPoint.y - stage.stageHeight/2) / Math.sqrt((refPoint.x - stage.stageWidth/2) * (refPoint.x - stage.stageWidth/2) + (refPoint.y - stage.stageHeight/2) * (refPoint.y - stage.stageHeight/2)) * 10000 ) / 10000;
                sintext.autoSize = autotext;
                
                costext.text = "cosθ = " +
                Math.floor((refPoint.x - stage.stageWidth/2) / Math.sqrt((refPoint.x - stage.stageWidth/2) * (refPoint.x - stage.stageWidth/2) + (refPoint.y - stage.stageHeight/2) * (refPoint.y - stage.stageHeight/2)) * 10000 )/ 10000;
                costext.autoSize = autotext;
                
                theta.text = "θ = " + Math.floor ( - Math.atan2(refPoint.y - stage.stageHeight/2,refPoint.x - stage.stageWidth/2) * 180 / Math.PI * 10) / 10 + "°";
            }

        }
    }
}