Added the rest of the files

2021-08-18 19:24:55 -07:00
parent 8b192df20f
commit 8d02141211
48 changed files with 8318 additions and 0 deletions
--- a/chladni.html
+++ b/chladni.html
@@ -0,0 +1,130 @@
+<html>
+    <head>
+        <title>
+            Waves: Chladni plates
+        </title>
+        <style>
+            html, body {
+                width:  100%;
+                height: 100%;
+                margin: 0px;
+                border: 0;
+                overflow: hidden;
+                display: block;
+            }
+
+            canvas {
+                position: absolute;
+            }
+
+            form {
+                position: relative;
+            }
+        </style>
+    </head>
+    <body>       
+        <canvas id="myCanvas" width="1" height="1" style="border:1px solid #ffffff;">
+            Your browser does not support the HTML5 canvas tag.</canvas>
+        <form>
+            <label for="x">X mode</label> 
+            <input type="number" id="x" min="0" max="10" step="1" value="1">
+            <br>
+            <label for="y">Y mode</label> 
+            <input type="number" id="y" min="0" max="10" step="1" value="1">
+        </form>
+        
+        <script>
+        var c = document.getElementById("myCanvas");
+        var ctx = c.getContext("2d");
+        ctx.canvas.width = window.innerWidth;
+        ctx.canvas.height = window.innerHeight;
+    
+        var xMode = document.getElementById("x").value;
+        var yMode = document.getElementById("y").value;
+        var step = 0.01;
+        var sandThreshold = 0.01;
+        var plateSize = 53;
+        var xPos = 0;
+        var yPos = 0;
+
+        ctx.translate(ctx.canvas.width / 2, ctx.canvas.height / 2);
+        ctx.scale(4, -4);
+
+        function Clear(ctx)
+        {
+            ctx.clearRect(-c.width, -c.height, c.width * 2, c.height * 2);
+        }
+
+        function Update()
+        {
+            setTimeout(Update, 1000/60);
+            if (xMode != document.getElementById("x").value)
+            {
+                xMode = parseFloat(document.getElementById("x").value);
+                sandThreshold = 0.065 + 0.055 * (1.02 ** (xMode + yMode));
+                Clear(ctx);
+                Draw();
+            }
+            if (yMode != document.getElementById("y").value)
+            {
+                yMode = parseFloat(document.getElementById("y").value);
+                sandThreshold = 0.065 + 0.055 * (1.02 ** (xMode + yMode));
+                Clear(ctx);
+                Draw();
+            }
+        }
+
+        Update();
+        
+        function Draw()
+        {
+            ctx.beginPath();
+            ctx.moveTo(xPos - plateSize, yPos - plateSize);
+            ctx.lineTo(xPos + plateSize, yPos - plateSize);
+            ctx.lineTo(xPos + plateSize, yPos + plateSize);
+            ctx.lineTo(xPos - plateSize, yPos + plateSize);
+            ctx.lineTo(xPos - plateSize, yPos - plateSize);
+            ctx.stroke();
+            for (x = -1; x <= 0; x += step)
+            {
+                for (y = -1; y <= 0; y += step)
+                {
+                    if (Math.random() >= 0)
+                    {
+                        phi = (Math.cos(xMode * x * Math.PI) * Math.cos(yMode * y * Math.PI)) + (Math.cos(xMode * y * Math.PI) * Math.cos(yMode * x * Math.PI));
+                        console.log(phi);
+                        if (phi <= sandThreshold && phi >= -sandThreshold)
+                        {
+                            ctx.beginPath();
+                            ctx.arc(x * plateSize + xPos, y * plateSize + yPos, step * plateSize, 0, Math.PI * 2);
+                            ctx.fill();
+                            ctx.beginPath();
+                            ctx.arc(-x * plateSize + xPos, y * plateSize + yPos, step * plateSize, 0, Math.PI * 2);
+                            ctx.fill();
+                            ctx.beginPath();
+                            ctx.arc(x * plateSize + xPos, -y * plateSize + yPos, step * plateSize, 0, Math.PI * 2);
+                            ctx.fill();
+                            ctx.beginPath();
+                            ctx.arc(-x * plateSize + xPos, -y * plateSize + yPos, step * plateSize, 0, Math.PI * 2);
+                            ctx.fill();
+                            console.log("point");
+                        }
+                    }
+                }
+            }
+        }
+
+        Draw();
+    
+        window.addEventListener('resize', function(event) {
+            c.width = window.innerWidth;
+            c.height = window.innerHeight;
+            ctx.translate(c.width / 2, c.height / 2);
+            ctx.scale(4, -4);
+            Clear(ctx);
+            Draw();
+        }, true);
+
+        </script>
+    </body>
+</html>