orbit-sim/index.html at master · rebootl/orbit-sim · GitHub

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<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Orbit Simulator</title>
    <style>
      body {
        background-color: rgb(110, 110, 150);
      }
      #mybox {
        display: grid;
        grid-template-columns: 640px 260px;
        grid-template-rows: auto auto;
        grid-template-areas:
        "canvas params"
        "results params";
      }
      #mycanv {
        grid-area: canvas;
        width: 600px;
        height: 600px;
      }
      #input-params {
        grid-area: params;
        border: 1px solid #333;
        margin-left: 10px;
        padding: 0 10px 10px 10px;
      }
      #results {
        grid-area: results;
      }
      #makecircvx {
        font-size: 0.85em;
      }
      h1, h2, h3 {
        text-decoration: underline;
      }
      input {
        background-color: rgb(140, 140, 180);
        padding: 8px;
        border: 1px solid rgb(90, 90, 130);
        border-radius: 5px;
      }
      table {
        border-collapse: collapse;
        border: 2px solid rgb(90, 90, 130);
        letter-spacing: 1px;
        font-size: 0.8rem;
      }
      td {
        padding: 3px;
      }
    </style>
  </head>
  <body>
    <h1>Orbit Simulator</h1>
    <div id="mybox">
      <canvas id="mycanv" width="600" height="600"></canvas>
      <div id="input-params">
        <h2>Parameters</h2>
        <h3>Sim:</h3>
        <table>
          <tr>
            <td>dt:</td>
            <td><input type="text" id="in-dt" size="10" value="10" /></td>
          </tr>
          <tr>
            <td>n steps:</td>
            <td><input type="text" id="in-nsteps" size="10" value="5000" /></td>
          </tr>
          <tr>
            <td>zoom:</td>
            <td><input type="text" id="in-zoom" size="10" value="0.02" /></td>
          </tr>
          <tr>
            <td>integration<br> method:</td>
            <td>
              <input type="radio" id="in-euler" class="method" name="in-method" value="euler" checked>Euler<br>
              <input type="radio" id="in-verlet" class="method" name="in-method" value="verlet">Verlet<br>
              <input type="radio" id="in-both" class="method" name="in-method" value="both">Both
            </td>
          </tr>
          <tr>
            <td colspan=2>
                <input type="checkbox" id="pauseAfterLanding" name="pauseAfterLanding">
                <label for="pauseAfterLanding">Pause sim after landing</label>
            </td>
          </tr>
        </table>
        <h3>Planet:</h3>
        <table>
          <tr>
            <td>radius:</td>
            <td><input type="text" id="in-rpl" size="10" value="5000" /></td>
          </tr>
          <tr>
            <td>density:</td>
            <td><input type="text" id="in-dens" size="10" value="5100" /></td>
          </tr>
        </table>
        <h3>Spaceship:</h3>
        <table>
          <tr>
            <td>s0 x:</td>
            <td><input type="text" id="in-s0x" size="10" value="0" /></td>
          </tr>
          <tr>
            <td>s0 y:</td>
            <td><input type="text" id="in-s0y" size="10" value="6000" /></td>
          </tr>
          <tr>
            <td>v0 x:</td>
            <td><input type="text" id="in-v0x" size="10" value="6.5" />
            <button id="makecircvx" onclick="makeCircVx();">Calc. circ vx*</button>
            <button id="makeescvx" onclick="makeEscapeVx();">Calc. escape vx*</button></td>
          </tr>
          <tr>
            <td>v0 y:</td>
            <td><input type="text" id="in-v0y" size="10" value="1" /></td>
          </tr>
          <tr>
            <td>a pro-/<br>retrograde:</td>
            <td><input type="text" id="in-aprog" size="10" value="-0.0001" /></td>
          </tr>
        </table>
        <button onclick="run();">Run</button>
      </div>
      <div id="results">
        <h2>Results</h2>
        <h3>Orbit:</h3>
        <table>
          <tr>
            <td>vx, vy:</td>
            <td id="res-vxvy"></td>
          </tr>
        </table>
      </div>
      <small>* Calculates and sets v0 x for a circular orbit, using s0 y as
        radius and assuming s0 x = 0.</small>
    </div>
    <script src="landing-sim.js"></script>
  </body>
</html>