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path: root/2d/softbody/softbody_1.html.content
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<script src="./softbody_1/dist/output.js"></script>
<script>
  window.onload = function() {
      // -- Play/Stop Logic
      function addButtonListener(pPlay, pStop, pDisableElementList) {
          var lPlayElement = document.getElementById(pPlay),
              lStopElement = document.getElementById(pStop);
          lPlayElement.addEventListener('click', function() {
              lPlayElement.style.display = 'none';
              lStopElement.style.display = 'block';

              pDisableElementList.forEach(function(element) {
                  element.disabled = true;
              });
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          lStopElement.addEventListener('click', function() {
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              lPlayElement.style.display = 'block';

              pDisableElementList.forEach(function(element) {
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          document.getElementById('undamped_start_position'),
		  document.getElementById('undamped_spring_constant'),
          document.getElementById('undamped_spring_mass')
      ]);
      addButtonListener('gl_canvas_play_damped', 'gl_canvas_stop_damped', [
		  document.getElementById('damped_spring_length'),
          document.getElementById('damped_start_position'),
		  document.getElementById('damped_spring_constant'),
		  document.getElementById('damped_viscous_constant'),
          document.getElementById('damped_spring_mass')
      ]);

      // -- Slider logic
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              element.addEventListener('input', updateOutput);
              element.addEventListener('change', updateOutput);
              updateOutput();
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      // -- Add callbacks for sliders
      Module.onRuntimeInitialized = function() {
          var Undamped_SetLength = Module.cwrap('Undamped_SetLength', 'void', ['number']),
              Undamped_SetDisplacement = Module.cwrap('Undamped_SetDisplacement', 'void', ['number']),
              Undamped_SetK = Module.cwrap('Undamped_SetK', 'void', ['number']),
              Undamped_SetMass = Module.cwrap('Undamped_SetMass', 'void', ['number']),

			  Damped_SetLength = Module.cwrap('Damped_SetLength', 'void', ['number']),
              Damped_SetDisplacement = Module.cwrap('Damped_SetDisplacement', 'void', ['number']),
              Damped_SetK = Module.cwrap('Damped_SetK', 'void', ['number']),
              Damped_SetMass = Module.cwrap('Damped_SetMass', 'void', ['number']),
			  Damped_SetC = Module.cwrap('Damped_SetC', 'void', ['number']),
			  
              Undamped_lengthSlider = document.getElementById('undamped_spring_length'),
              Undamped_displacementSlider = document.getElementById('undamped_start_position'),
              Undamped_kSlider = document.getElementById('undamped_spring_constant'),
              Undamped_massSlider = document.getElementById('undamped_spring_mass'),

			  Damped_lengthSlider = document.getElementById('damped_spring_length'),
              Damped_displacementSlider = document.getElementById('damped_start_position'),
              Damped_kSlider = document.getElementById('damped_spring_constant'),
              Damped_massSlider = document.getElementById('damped_spring_mass'),
			  Damped_cSlider = document.getElementById('damped_viscous_constant'),
			  
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          Damped_kSlider.addEventListener('change', function(event) { Damped_SetK(Number(event.target.value)); });
          Damped_massSlider.addEventListener('change', function(event) { Damped_SetMass(Number(event.target.value)); });
		  Damped_cSlider.addEventListener('change', function(event) { Damped_SetC(Number(event.target.value)); });
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</script>
<article>
  <h1>Springs</h1>
  <section>
	<p>
    It is time to investigate what it means to have a deformation in our physics system. By deformation, I mean that the
    vertices of our shapes are no longer fixed to one point within the model. We will begin with what I believe
    by investigating the most common of all deformations: a weight attached to a spring in two dimensions.
	</p>
  </section>
  <section>
	<h2></h2>
  </section>
  <section>
	<h2>
	  Undamped Springs
	</h2>
    <p>
      <span class='widget_container'>
        <label for='undamped_spring_length'>Spring Length (m)</label>
        <input type='range' id='undamped_spring_length' min="50" max="300" value="150"/>
        <span></span>
      </span>
      
      <span class='widget_container'>
        <label for='undamped_start_position'>Start Displacement (m)</label>
        <input type='range' id='undamped_start_position' min='-150' max='150' value='0'/>
        <span></span>
      </span>

      <span class='widget_container'>
        <label for='undamped_spring_constant'>Spring Constant (N / m)</label>
        <input type='range' id='undamped_spring_constant' min='0' max='1000.0' value='1.0' step='0.1'/>
        <span></span>
      </span>

      <span class='widget_container'>
        <label for='undamped_spring_mass'>Mass (kg)</label>
        <input type='range' id='undamped_spring_mass' min='0' max='10.0' value='1.0' step='0.1'/>
        <span></span>
      </span>
      
    </p>
    <div class="opengl_canvas_container">
      <canvas id="gl_canvas_undamped" width="800" height="600"></canvas>
      <button id="gl_canvas_play_undamped" class="play_button">
        Play
      </button>
      <button id="gl_canvas_stop_undamped" class="stop_button">
        Stop
      </button>
    </div>
  </section>

  <section>
	<h2>
	  Damped Springs
	</h2>
    <p>
      <span class='widget_container'>
        <label for='damped_spring_length'>Spring Length (m)</label>
        <input type='range' id='damped_spring_length' min="50" max="300" value="150"/>
        <span></span>
      </span>
      
      <span class='widget_container'>
        <label for='damped_start_position'>Start Displacement (m)</label>
        <input type='range' id='damped_start_position' min='-150' max='150' value='0'/>
        <span></span>
      </span>

      <span class='widget_container'>
        <label for='damped_spring_constant'>Spring Constant (N / m)</label>
        <input type='range' id='damped_spring_constant' min='0' max='1000.0' value='1.0' step='0.1'/>
        <span></span>
      </span>

	  <span class='widget_container'>
        <label for='damped_viscous_constant'>Viscous Damping Constant (N / m)</label>
        <input type='range' id='damped_viscous_constant' min='0' max='1000.0' value='1.0' step='0.1'/>
        <span></span>
      </span>

      <span class='widget_container'>
        <label for='damped_spring_mass'>Mass (kg)</label>
        <input type='range' id='damped_spring_mass' min='0.1' max='10.0' value='1.0' step='0.1'/>
        <span></span>
      </span>
      
    </p>
    <div class="opengl_canvas_container">
      <canvas id="gl_canvas_damped" width="800" height="600"></canvas>
      <button id="gl_canvas_play_damped" class="play_button">
        Play
      </button>
      <button id="gl_canvas_stop_damped" class="stop_button">
        Stop
      </button>
    </div>
  </section>

  <footer id='references'>
    <h2>References</h2>
    <ul>
      <li>
        <a href='https://www.youtube.com/watch?v=Z52emur7Rko'>Wonderful Undamped Resource</a>
      </li>
      <li>
        <a href='https://www.youtube.com/watch?v=CTd1uVq5-l8'>Wonderful Damped Resource</a>
      </li>
      <li>
        <a href='http://ambrsoft.com/CalcPhysics/Spring/SpringData.htm'>List of Equations for Spring Motion</a>
      </li>
      <li>
        <a href='https://www.ryanjuckett.com/damped-springs/'>Ryan Juckett's Explanation of Damped Springs</a>
      </li>
    </ul>
  </footer>
</article>