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index.html
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<!doctype html>
<html>
<head>
<title>Huygen's Principle</title>
<style>
body {
background: white;
color: #323232;
font-weight: 300;
height: 100vh;
margin: 0;
display: flex;
align-items: center;
justify-content: center;
text-align: center;
font-family: Helvetica neue, roboto;
}
img {
width: 56px;
height: 48px;
}
h1 {
font-weight: 200;
font-style: 26px;
margin: 10px;
}
</style>
</head>
<body>
<div id="canvasdiv" class="container" align="center">
<canvas id="myCanvas" style="border: 1px solid #c3c3c3;" width="900px" height="480px">
Your browser does not support the HTML5 canvas tag.
</canvas>
<div style="padding-left:20px">
<b>Source: </b>
<label class="white"><input id="chkSrc1" onchange="chkSrc1_onChange(null,this.checked)" type="checkbox" checked>1</label>
<label class="white"><input id="chkSrc2" onchange="chkSrc2_onChange(null,this.checked)" type="checkbox" checked>2</label>
<br>
<span class="white">Check to make sources are out of phase: </span>
<label class="white"><input id="chkPhase" onchange="chkPhase_onChange(null,this.checked)" type="checkbox" checked>1</label>
<br>
<span class="white">Check to bring sources at center: </span>
<label class="white"><input id="chkSrcLoc" onchange="chkSrcLoc_onChange(null,this.checked)" type="checkbox" checked>1</label>
<br>
</div>
<div id="slider1"><b>WaveLength </b>30 <input id="a" max="400" min="30" step="5" type="range"
oninput="a_onChange(this,this.value);"
onchange="a_onChange(this,this.value);" value="80"> 400
</div>
<div id="slider2"><b>Frequency </b>1 <input id="b" max="8" min="1" step="0.5" type="range"
oninput="b_onChange(this,this.value);"
onchange="b_onChange(this,this.value);" value="3"> 8
</div>
<div id="slider3"><b>Amplitude </b>1 <input id="c" max="40" min="1" step="0.5" type="range"
oninput="c_onChange(this,this.value);"
onchange="c_onChange(this,this.value);" value="10"> 10
</div>
<div id="slider4"><b>Separation </b>10 <input id="d" max="500" min="20" step="5" type="range"
oninput="d_onChange(this,this.value);"
onchange="d_onChange(this,this.value);" value="120"> 500
</div>
</div>
<script type='text/javascript'>
// XYZPoint
const canvas = document.getElementById('myCanvas');
const ctx = canvas.getContext('2d');
var isDragging = false;
canvas.addEventListener('mousewheel', mouseWheelMoved);
canvas.addEventListener('mousemove', mouseDragged);
canvas.addEventListener('mousedown', mousePressed);
canvas.addEventListener('mouseup', mouseReleased)
canvas.addEventListener('touchstart', myTouchStart, false); // touch handler for iPhones, iPads, and Androids
canvas.addEventListener('touchmove', myTouchMove, false); // touch handler for iPhones, iPads, and Androids
canvas.addEventListener('touchend', myTouchEnd, false); // touch handler for iPhones, iPads, and Androids
window.addEventListener('keydown', onKeyEvent, false);
function myTouchMove(event) {
let touch = event.touches[0];
let mouseEvent = new MouseEvent('mousemove', {
clientX: touch.clientX,
clientY: touch.clientY,
});
canvas.dispatchEvent(mouseEvent);
}
function myTouchStart(event) {
event.preventDefault();
let touch = event.touches[0]
let mouseEvent = new MouseEvent('mousedown', {
clientX: touch.clientX,
clientY: touch.clientY,
});
canvas.dispatchEvent(mouseEvent);
}
function myTouchEnd(event) {
event.preventDefault();
let mouseEvent = new MouseEvent('mouseup', {
clientX: touch.clientX,
clientY: touch.clientY,
});
canvas.dispatchEvent(mouseEvent);
}
function getTouchPos(event) {
event.preventDefault();
let rect = canvas.getBoundingClientRect();
return {
x: event.touches[0].clientX - rect.left,
y: event.touches[0].clientY - rect.top,
};
}
function getMousePos(event) {
let rect = canvas.getBoundingClientRect();
return {
x: event.clientX - rect.left,
y: event.clientY - rect.top,
};
//return {
//x: event.pageX - canvasdiv.offsetLeft ,
//y: event.pageY - canvasdiv.offsetTop
//};
}
function mousePressed(me) {
let m = getMousePos(me);
mx = m.x;
my = m.y;
isDragging= true;//ctx.isPointInPath(vernier.path, mx, my) //((mx-ox*scale)/scale, (my-oy*scale)/scale);
updateView()
}
function mouseReleased(me) {
isDragging = false;
updateView()
}
function mouseWheelMoved(me) {
me.preventDefault();
let scroll=me.wheelDelta>0?2:-2;
rho+=scroll;
updateView()
}
function mouseDragged(me) {
me.preventDefault();
if (!isDragging) return;
let dx, dy;
let m = getMousePos(me);
dx = (m.x - mx) ;
dy = (m.y - my) ;
mx = m.x;
my = m.y;
theta+=dx/50;
phi-=dy/50;
updateView();
}
function onKeyEvent(e) {
e.preventDefault;
if (e.keyCode == 37) {
vernier.translate(-1);
return true;
} else if (e.keyCode == 39) {
vernier.translate(1);
return true;
}
updateView()
}
function b_onChange(widget,value){
//setFrequency(value);
//setFrequency(value);
}
function c_onChange(widget,value){
function d_onChange(widget,value){
}
function chkSrc1_onChange(widget,value)
{
//amplitudeS1 = value ? Number(document.getElementById("c").value): 0;
}
function chkSrc2_onChange(widget,value)
{
// amplitudeS2 = value ? Number(document.getElementById("c").value): 0;
}
function chkPhase_onChange(widget,value)
{
//phaseDifference = value?lambda / 2:0;
}
function chkSrcLoc_onChange(widget,value)
{
}
</script>
</body>
</html>