cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

Quick-add: + add another resource

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

Quick-add: + add another resource

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              <p>Hover the vertices (intersection points in the middle of the edges are <b>not</b> vertices).</p>

<p><b>What are these?</b> Regular polygons (all angles and all vertices equal) gallery. Both regular convex polygons and regular star polygons.</p>

<p><b>What do the <code>p</code> and <code>q</code> mean?</b> <code>p</code> is the number of vertices. They are all distributed evenly on a circle. For <code>q =1</code>, you connect each point to the next one on the circle (clockwise or counterclockwise, it doesn't matter). For <code>q = 2</code>, you skip the first one and connect to the 2nd. For <code>q = 3</code>, you skip the first two and connect to the 3rd. And so on... as long as <code>q < p/2</code>.</p>
<p><code>{p, q}</code> is the <a href='http://en.wikipedia.org/wiki/Schl%C3%A4fli_symbol' target='_blank'>Schläfli symbol</a>.</p>
            
          
!
            
              
body {
  background: #222;
  color: #eee;
  font: 1em/1 trebuchet ms, verdana, sans-serif;
  text-align: center;
}

p {
  margin: 1em auto;
  width: 90vw;
  text-align: left;
}

b { color: lemonchiffon; }

a {
  color: yellow;
  &:hover { color: red; }
}

.shape-wrapper {
  display: inline-block;
  position: relative;
  padding-top: 3em;
  width: 19vw; height: 19vw;
  box-shadow: 0 0 2px rgba(#fff, .25);
  
  @media (max-width: 1000px) {
    width: 23vw; height: 23vw;
  }
  
  @media (max-width: 800px) {
    width: 45vw; height: 45vw;
  }
  
  @media (max-width: 400px) {
    width: 90vw; height: 90vw;
  }
  
  &:before, &:after {
    position: absolute;
    top: .25em;
    padding: .5em;
    border-radius: .25em;
    background: tan;
    color: black;
    transition: .35s;
  }
  
  &:before {
    left: .25em;
    content: 'point:' attr(data-curr);
  }
  
  &[data-curr='']:before { display: none; }
  
  &:after {
    right: .25em;
    opacity: .32;
    content: attr(data-type);
  }
  
  &:hover:after { opacity: .99; }
}

path {
  fill: rgba(#eee, .03);
  stroke: red;
  stroke-width: 16;
  filter: drop-shadow(0 0 25px tan);
}

.p {
  fill: red;
  stroke: tan;
  stroke-width: 16;
  opacity: .32;
  cursor: pointer;
  
  &:hover {
    opacity: .99;
  }
}
            
          
!
            
              var NS_URI = 'http://www.w3.org/2000/svg', 
    MAX_P = 17,
    frag = document.createDocumentFragment();

Node.prototype.setAttrs = function(attr_obj) {
  for(var prop in attr_obj) {
    this.setAttribute(prop, attr_obj[prop]);
  }
};

Node.prototype.getAncestorWithClass = function(cls) {
  var parent = this.parentNode, parent_cls;
    
  if(!parent) { return null; }
  
  parent_cls = parent.getAttribute('class');
  if(!parent_cls || parent_cls.indexOf(cls) === -1) {
    return parent.getAncestorWithClass(cls);
  }
  else { return parent; }
};

var generatePoly = function(parent, p, q, r) {
  var path = document.createElementNS(NS_URI, 'path'), 
      points = document.createElementNS(NS_URI, 'g'), 
      curr_g, 
      curr_point, 
      base_angle = 2*Math.PI/p, 
      angle = (Math.random() -q)*base_angle, 
      x, y, d_attr = '';
  
  for(var i = 0; i < p; i++) {
    curr_g = document.createElementNS(NS_URI, 'g');
    
    angle += q*base_angle;
    
    x = ~~(r*Math.cos(angle));
    y = ~~(r*Math.sin(angle));
    
    d_attr += 
      ((i === 0)?'M':'L') + x + ' ' + y + ' ';
    
    if(i*q%p === 0 && i > 0) {
      angle += base_angle;
      x = ~~(r*Math.cos(angle));
      y = ~~(r*Math.sin(angle));
      
      d_attr += 'M' + x + ' ' + y + ' ';
    }
    
    curr_point = document.createElementNS(NS_URI, 'circle');
    curr_point.setAttrs({
      'class': 'p p--' + i, 
      'cx': x, 'cy': y, 
      'r': 32
    });
    curr_g.appendChild(curr_point);
    
    points.appendChild(curr_g);
  }
  
  d_attr += 'z'
  
  path.setAttribute('d', d_attr);
  path.setAttribute('fill-rule', 'evenodd');
  parent.appendChild(path);
  parent.appendChild(points)
};

var addTests = function(MAX_P) {
  var wrapper, svg, path, 
      w = 2000, h = 2000, 
      k = .4, 
      r = k*Math.min(w, h);
  
  for(var p = 3; p <= MAX_P; p++) {
    for(var q = 1; q < p/2; q++) {
      wrapper = document.createElement('div');
      wrapper.classList.add('shape-wrapper');
      wrapper.dataset.type = 
        'p: ' + p + ', q: ' + q;
      wrapper.dataset.curr = '';
      
      svg = document.createElementNS(NS_URI, 'svg');
      svg.setAttribute('viewBox', -w/2 + ' ' + -h/2 + ' ' + w + ' ' + h);
      
      generatePoly(svg, p, q, r);
      
      wrapper.appendChild(svg);
      frag.appendChild(wrapper)
    }
  }
  
  document.body.appendChild(frag);
};

addTests(MAX_P);

addEventListener('mouseover', function(e) {
  var t = e.target, 
      cls = t.getAttribute('class'), 
      idx, a;
  
  if(cls && cls.indexOf('p--') > -1) {
    idx = ~~cls.split('p--')[1].split(' ')[0];
    a = t.getAncestorWithClass('shape-wrapper');
    a.dataset.curr = '' + (idx + 1);
  }
}, false);

addEventListener('mouseout', function(e) {
  var t = e.target, 
      cls = t.getAttribute('class'), 
      idx, a;
  
  if(cls && cls.indexOf('p--') > -1) {
    idx = ~~cls.split('p--')[1].split(' ')[0];
    a = t.getAncestorWithClass('shape-wrapper');
    a.dataset.curr = '';
  }
}, false);
            
          
!
999px
Loading ..................

Console