光の屈折　optical refraction

かなり荒削りだけど屈折の原理とはどんなもんなのか考えてみた。
屈折率の高い媒質に移ると波長も短くなるのが分からなくもない
丸っこいのが光子で、赤いのが波のつもり。

2013.12.13 左上のテキストをクリックで屈折率変化

by KBM 13 Dec 2013

Embed

/**
 * Copyright KBM ( http://wonderfl.net/user/KBM )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/vbl9
 */

package {
    import flash.events.MouseEvent;
    import flash.text.TextFieldAutoSize;
    import flash.text.TextFormat;
    import flash.text.TextField;
    import flash.display.Stage;
    import flash.display.Shape;
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            // write as3 code here..
            var frame:int = 0;
            var particles:Array = [];
            var fre_ap:int = 2; /*パーティクル出現頻度 1 ~ 60  推奨1 ~ 5*/
            var n:Number = 1.6; /*屈折率*/
            var waves:Array = [];
            var ptcl_quantity:int = 20; /*パーティクル出現量*/
            var medium1:Shape = new Shape(); /*媒質1*/
            var medium2:Shape = new Shape(); /*媒質2*/
            const SW:int = stage.stageWidth;
            const SH:int = stage.stageHeight;
            addChild(medium1);
            with(medium1.graphics){
                beginFill(0xDDDDFF);
                drawRect(0,0,SW,SH / 3 * 2)
            }

            addChild(medium2)
            with(medium2.graphics){
                beginFill(0x444444);
                drawRect(0,SH / 3 * 2, SW, SH / 3);
            }
            
            var n_changer:Sprite = new Sprite();
            addChild(n_changer);
            var n_change_text:TextField = new TextField();
            with(n_change_text){
            mouseEnabled = false;
            autoSize = TextFieldAutoSize.CENTER;
            defaultTextFormat = new TextFormat(null,20,0x0);
            text = "n = 0.8\nn = 1.4\nn = 3\nn = 5";
            }
            n_changer.addChild(n_change_text);
            n_changer.buttonMode = true;
            
            n_changer.addEventListener(MouseEvent.CLICK,function ():void{
                if(n_changer.mouseY < n_changer.height / 4) n = 0.8;
                else if(n_changer.mouseY < n_changer.height / 4 * 2) n = 1.4;
                else if(n_changer.mouseY < n_changer.height / 4 * 3) n = 3;
                else if(n_changer.mouseY < n_changer.height) n = 5; 
            })
            
            function enterFrame():void{
                if(frame % (60 / fre_ap) == 0){
                    var w_particle:Array = [];
                    for(var i:int = 0; i < ptcl_quantity;i++){
                    var particle:Particle = new Particle();
                    particle.x = i * 10; particle.y = 10 * ptcl_quantity - i * 10;
                    w_particle.push(particle);
                    particles.push(particle);
                    addChild(particle);
                    }
                    var wave:Wave = new Wave(w_particle);
                    waves.push(wave);
                    addChild(wave);
                }
                
                if(frame % 1 == 0){
                for(i = 0; i < particles.length; i ++){
                    with(particles[i]){
                        if(y > SH / 3 * 2){speed = 4 / n;}
                    }
                    
                    with(particles[i]){
                        x += speed * Math.cos(argument * 3.1 / 180);
                        y += speed * Math.sin(argument * 3.1 / 180);
                    }
                    if(particles[i].y > SH && particles[i].x > SW ){
                         removeChild(particles[i])
                         particles.splice(i,1);
                    }

                 }
                
                for(i = 0; i < waves.length ; i++){
                    with(waves[i]){
                        x = ctrlPoints[0].x;
                        y = ctrlPoints[ctrlPoints.length - 1].y - 10;
                        width = ctrlPoints[ctrlPoints.length - 1].x - ctrlPoints[0].x;
                        height = ctrlPoints[0].y - ctrlPoints[ctrlPoints.length - 1].y;
                        
                    }
                    
                    for(var j:int = 0; j < waves[i].ctrlPoints.length ; j++){
                        waves[i].ctrlPoints[j].argument = Math.atan2(waves[i].width,waves[i].height) * 180 / 3.1;
                    }

                }

                }
                frame ++;
            }

            addEventListener(Event.ENTER_FRAME,enterFrame)
        }
    }
}
import flash.display.Shape;
import flash.display.Graphics;
import flash.display.Sprite;
import flash.geom.Point;

class Particle extends Sprite {
    public var point:Point;
    public var speed:Number;
    public var argument:int;
    private var g:Graphics;
    private var r:int;
    public function Particle(){
        r = 2;
        g = this.graphics;
        g.beginFill(0xFFD700);
        g.lineStyle(0,0x333333);
        g.drawCircle(-r,-r,r);
        speed = 4;
        argument = 20; /*進行方向の偏角 1 ~ 360推奨*/
    }
    
    public function setPoints():void{
        if(this.parent != null){
            point = new Point(this.x,this.y);
        }
    }

}

class Wave extends Shape{
    public var ctrlPoints:Vector.<Particle>;
    private var g:Graphics;
    public function Wave(particles:Array){
    g = this.graphics
    ctrlPoints = new Vector.<Particle>();
    for(var i:int = 0; i < particles.length; i ++){
        ctrlPoints.push(particles[i])
    }

    ctrlPoints.fixed = true;
    
    g.lineStyle(3,0xDD0000);
    g.moveTo(ctrlPoints[0].x,ctrlPoints[0].y);
    g.lineTo(ctrlPoints[ctrlPoints.length - 1].x,ctrlPoints[ctrlPoints.length - 1].y);
    }
}