simulations/oscillators.html at master · eirkostop/simulations · GitHub

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<!DOCTYPE html>

<html>

<head>
  <meta charset="utf-8">
  <title>Oscillator</title>
  <link rel="shortcut icon" href="img/favicon.ico" type="image/x-icon">
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.2.0/css/all.css" integrity="sha384-hWVjflwFxL6sNzntih27bfxkr27PmbbK/iSvJ+a4+0owXq79v+lsFkW54bOGbiDQ" crossorigin="anonymous">

	<style>
.myCanvas-button {
    padding: .4em 1em;
    display: inline-block;
    position: relative;
    line-height: normal;
    margin-right: .1em;
    cursor: pointer;
    vertical-align: middle;
    text-align: center;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    overflow: visible;
}
</style>

	</head>

<body style="margin:0;">

  <div  style="width:300px; margin-left:auto; margin-right:auto;">
  <div style="position:absolute; z-index:2; margin:5px;">
  <div style="width:300px; float: left; text-align:center;">
  <i class="fa fa-play myCanvas-button"  style="color:#404040" onclick="startMotion();" title="Έναρξη"></i>
  <i class="fa fa-pause myCanvas-button"  style="color:#404040" onclick="stopMotion();" title="Παύση"></i>
<i class="fa fa-redo myCanvas-button"  style="color:#404040" onclick="restartMotion();" title="Επανεκκίνηση"></i>
</div>
</div>
<canvas style="background:white" id="oscillatorCanvas" width="300" height="120">
</canvas>
  </div>


<script>
var oscillatorCanvas = document.getElementById("oscillatorCanvas");
var oscillatorContext = oscillatorCanvas.getContext("2d");
var x1=135;
var x2=135;
var t=0;
var timer;
var scale=1;
			initialize();

			function initialize() {
				window.addEventListener('resize', resizeCanvas, false);
				resizeCanvas();
			}
			function resizeCanvas() {
			if(window.innerWidth<300){
			scale=window.innerWidth/300;oscillatorCanvas.width=300*scale;oscillatorCanvas.height=120*scale; oscillatorContext.scale(scale,scale);}
			if(window.innerWidth>=300){oscillatorCanvas.width = 300; oscillatorCanvas.height=120;}
				drawOscillator();
			}

  function drawOscillator() {
  oscillatorContext.clearRect(0, 0, 300, 120);
  x1=135+130*Math.sin(t);
  oscillatorContext.beginPath();
  oscillatorContext.fillStyle="#5BB3AF";
  oscillatorContext.fillRect(x1,45,30,30);

  x2=135+130*Math.sin(t/4);
  oscillatorContext.beginPath();
  oscillatorContext.fillStyle="#5BB3AF";
  oscillatorContext.fillRect(x2,85,30,30);

  oscillatorContext.beginPath();

oscillatorContext.moveTo(20,60);
oscillatorContext.lineTo(280,60);
oscillatorContext.moveTo(20,55);
oscillatorContext.lineTo(20,65);
oscillatorContext.moveTo(150,55);
oscillatorContext.lineTo(150,65);
oscillatorContext.moveTo(280,55);
oscillatorContext.lineTo(280,65);
oscillatorContext.moveTo(20,100);
oscillatorContext.lineTo(280,100);
oscillatorContext.moveTo(20,95);
oscillatorContext.lineTo(20,105);
oscillatorContext.moveTo(150,95);
oscillatorContext.lineTo(150,105);
oscillatorContext.moveTo(280,95);
oscillatorContext.lineTo(280,105);
oscillatorContext.stroke();
  }

  drawOscillator();
  function moveOscillator () {

  t += 0.1;
	drawOscillator();
    timer=window.setTimeout(moveOscillator, 1000/30);
	}


 function startMotion(){
 window.clearTimeout(timer);
 moveOscillator();}
  function stopMotion(){
 window.clearTimeout(timer);
}
  function restartMotion(){
 x1=135;x2=135;
	t=0;
	drawOscillator();
 window.clearTimeout(timer);

}
</script>

</body>
</html>