Renamed programs

2021-08-28 12:38:36 -07:00
parent 9a25fe2a65
commit cc52ce8e75
4 changed files with 0 additions and 0 deletions
--- a/1-7.html
+++ b/1-7.html
@@ -0,0 +1,151 @@
+<!--
+    This work is licensed under CC BY-NC-ND 4.0            
+    Link to license: http://creativecommons.org/licenses/by-nc-nd/4.0/
+    Attribute to Russell Georgi
+-->
+<html>
+    <head>
+        <title>
+            Exercise 1-7
+        </title>
+        <style>
+            html, body {
+                width:  100%;
+                height: 100%;
+                margin: 0px;
+                border: 0;
+                overflow: hidden;
+                display: block;
+            }
+
+            canvas {
+                position: absolute;
+            }
+
+            t {
+                position: absolute;
+                font-size: 75px;
+                left: 5%;
+                top: 5%;
+            }
+        </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>
+        <t id="time">0</t>
+        
+        <script>
+        var c = document.getElementById("myCanvas");
+        var ctx = c.getContext("2d");
+        c.width = window.innerWidth;
+        c.height = window.innerHeight;
+        //Time step
+        var dt = 0.01;
+        var t = 0;
+        var g = 980;
+        var lx = 200;
+        var ly = 200;
+        var pulleyR = 2;
+        var r = 100;
+        var rp = 0;
+        var theta = Math.PI / 18;
+        var thetap = 0;
+        //Relative position of canvas
+        var xPos = 0;
+        var yPos = 70;
+        //Moves and scales canvas
+        ctx.translate(ctx.canvas.width / 2, ctx.canvas.height / 2)
+        ctx.scale(2, -2);
+
+        function Clear(ctx)
+        {
+            ctx.clearRect(-c.width, -c.height, c.width * 2, c.height * 2);
+        }
+
+        function Update()
+        {
+            Clear(ctx);
+            Draw();
+            t += dt;
+            
+            if (t == 0)
+            {
+                console.log("zero");
+                rp = 0;
+                thetap = 0;
+                theta = Math.PI / 18;
+                r = 100;
+            }
+            if (t >= 0)
+            {
+                document.getElementById("time").textContent = t.toFixed(2) + " seconds";
+                console.log("greater");
+                rp += (dt / 2) * ((r * thetap * thetap) - g * (1 - Math.cos(theta)));
+                r += rp * dt;
+                thetap += dt * (-(2 * rp * thetap / r) - (g * Math.sin(theta) / r));
+                theta += thetap * dt;
+            }
+            if (r >= 200)
+            {
+                console.log(t);
+                t = -1000;
+                setTimeout(Reset, 2000);
+                r = 199.99;
+            }
+            setTimeout(Update, 1);
+        }
+
+        function Reset()
+        {
+            t = 0;
+            rp = 0;
+            thetap = 0;
+            theta = Math.PI / 18;
+            r = 100;
+        }
+
+        function Draw()
+        {
+            ctx.beginPath();
+            ctx.moveTo(xPos + lx / 2, yPos + pulleyR);
+            ctx.lineTo(xPos - lx / 2, yPos + pulleyR);
+            ctx.stroke();
+            ctx.beginPath();
+            ctx.arc(xPos + lx / 2, yPos, pulleyR, 0, Math.PI * 2);
+            ctx.stroke();
+            ctx.beginPath();
+            ctx.arc(xPos - lx / 2, yPos, pulleyR, 0, Math.PI * 2);
+            ctx.stroke();
+            ctx.beginPath();
+            ctx.moveTo(xPos + lx / 2 + pulleyR, yPos);
+            ctx.lineTo(xPos + lx / 2 + pulleyR + r * Math.sin(theta), yPos - r * Math.cos(theta));
+            ctx.stroke();
+            ctx.beginPath();
+            ctx.moveTo(xPos - lx / 2 - pulleyR, yPos);
+            ctx.lineTo(xPos - lx / 2 - pulleyR, yPos - (250 - r));
+            ctx.stroke();
+            ctx.beginPath();
+            ctx.arc(xPos + lx / 2 + pulleyR + r * Math.sin(theta), yPos - r * Math.cos(theta), 5, 0, Math.PI * 2);
+            ctx.fill();
+            ctx.beginPath();
+            ctx.arc(xPos - lx / 2 - pulleyR, yPos - (250 - r), 5, 0, Math.PI * 2);
+            ctx.fill();
+        }
+
+
+        window.addEventListener('resize', function(event) {
+            c.width = window.innerWidth;
+            c.height = window.innerHeight;
+            ctx.translate(c.width / 2, c.height / 2);
+            ctx.scale(2, -2);
+        }, true);
+
+        Update();
+
+        </script>
+    </body>
+    <p xmlns:cc="http://creativecommons.org/ns#" style="font-size: 1vw; bottom: 0px; position: absolute;">
+        This work is licensed under 
+        <a href="http://creativecommons.org/licenses/by-nc-nd/4.0/?ref=chooser-v1" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">CC BY-NC-ND 4.0<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1"><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1"><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nc.svg?ref=chooser-v1"><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nd.svg?ref=chooser-v1"></a></p>
+</html>