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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <section class='panel'>
  <section class='controls'>
    <fieldset class='sub'>
      <legend>
        axis
        <div class='infopop'>the axis along which we skew the element</div>
      </legend>

      <input name='axis' type='radio' id='x' 
             class='ac' checked/>
      <label for='x'><var>x</var> axis</label>

      <input name='axis' type='radio' id='y' 
             class='ac'/>
      <label for='y'><var>y</var> axis</label>
    </fieldset>
    
    <section class='sub'>
      <label for='a'>
        angle
        <div class='infopop'>the skew angle</div>
      </label>
      <input type='range' id='a' min='-89' max='89'/>
    </section>
  </section>
  
  <pre class='codebox'>transform: skewX(0deg)</pre>
</section>

<section class='panel'>
  <svg viewbox='-512 -512 1024 1024'>
    <defs>
      <path id='sqb' 
            d='M-256 -256 L256 -256 
               L240 -240 L-240 -240z' />
    </defs>

    <g class='initial'>
      <g class='square'>
        <use class='sqb' 
             xlink:href='#sqb' />
        <use class='sqb' transform='rotate(90)' 
             xlink:href='#sqb' />
        <use class='sqb' transform='rotate(180)'
             xlink:href='#sqb' />
        <use class='sqb' transform='rotate(270)'
             xlink:href='#sqb' />
      </g>
      <g class='coord-syst'>
        <path d='M-500 0 L490 0
                 L485 -10 L500 0 L485 10 L490 0
                 M0 -500 L0 490
                 L-10 485 L0 500 L10 485 L0 490'/>
        <text x='500' y='32'
              text-anchor='end'>x</text>
        <text x='16' y='500'>y</text>
      </g>
    </g>
    <g class='final dir--x'>
      <g class='square'>
        <use class='sqb' 
             xlink:href='#sqb' />
        <use class='sqb' transform='rotate(90)' 
             xlink:href='#sqb' />
        <use class='sqb' transform='rotate(180)'
             xlink:href='#sqb' />
        <use class='sqb' transform='rotate(270)'
             xlink:href='#sqb' />
      </g>
      <g class='coord-syst'>
        <path class='axis axis--x' 
              d='M-500 0 L490 0
                 L485 -10 L500 0 L485 10 L490 0'/>
        <path class='axis axis--y' 
              d='M0 -500 L0 490
                 L-10 485 L0 500 L10 485 L0 490'/>
        <text class='axis--x' x='500' y='32'
              text-anchor='end'>x</text>
        <text class='axis--y' x='16' y='500'>y</text>
      </g>
    </g>
    
    <circle cx='192' cy='192' class='point initial' r='8' />
    <circle cx='192' cy='192' class='point final' r='8' />
    <path class='conn' d='M192 192 L192 192' />
    
    <path class='arc' d='' />
  </svg>
</section>
            
          
!
            
              @mixin track() {
  width: 14em; height: .375em;
  background: #333;
}

@mixin thumb() {
  border: none;
  border-radius: 0;
  width: 1em; height: 1em;
  box-shadow: inset 0 0 0 3px #333;
  background: #ccc;
}

@mixin thumb-focus() {
  background: #4ca454;
}

html { min-width: 15em; }

svg {
  display: block;
  overflow: visible;
  margin: 0 auto;
  min-width: 15em; min-height: 15em;
  width: 90vmin; height: 90vmin;
}

.controls {
  font: 1.125em trebuchet ms, sans-serif;
  
  var { font: 700 italic 1.125em serif; }
}

.initial { opacity: .32; }

.sqb {
  .dir--x &:nth-child(even), 
  .dir--y &:nth-child(odd) {
    fill: #be4c39;
  }
}

.coord-syst {
  stroke: #000;
  
  path { stroke-width: 2; }
  
  .dir--x & .axis--x, .dir--y & .axis--y {
    fill: #4472b9;
    stroke: #4472b9;
  }
  .dir--x & .axis--y, .dir--y & .axis--x {
    fill: #4ca454;
    stroke: #4ca454;
  }
  
  text {
    font: italic 2em serif;
  }
}

.conn, .arc {
  fill: darkorange;
  stroke: darkorange;
  stroke-width: 2;
}



.infopop {
  position: absolute;
  transform: scale(0);
}

input[type='radio'] {
  &, + label { cursor: pointer; }
}

input[type='range'] {
  &, 
  &::-webkit-slider-runnable-track, 
  &::-webkit-slider-thumb {
    -webkit-appearance: none;
  }  
  
  display: block;
  padding: 0;
  width: 14em; height: 2em;
  background: transparent;
  font-size: 1em;
  cursor: pointer;
  
  &::-webkit-slider-runnable-track {
    @include track();
  }
  &::-moz-range-track {
    @include track();
  }
  &::-ms-track {
    @include track();
    color: transparent;
  }
  &::-ms-fill-lower, 
  &::-ms-tooltip { display: none; }
  
  &::-webkit-slider-thumb {
    margin-top: -.3125em;
    @include thumb();
  }
  &::-moz-range-thumb {
    @include thumb();
  }
  &::-ms-thumb {
    @include thumb();
  }
  
  &:focus {
    outline: solid 0 transparent;
    
    &::-webkit-slider-thumb {
      @include thumb-focus();
    }
    &::-moz-range-thumb {
      @include thumb-focus();
    }
    &::-ms-thumb {
      @include thumb-focus();
    }
  }
}

.codebox {
  padding: .5em;
  background: #1d1f21;
  font: 600 1.375em monospace;
}

.token {
  &--property { color: lighten(#9b869c, 20%); }
  &--punctuation { color: #ccc; }
  &--value { color: lighten(#cd6a51, 20%); }
  &--function { color: lighten(#4ca454, 20%); }
  &--argument { color: #fff; }
  &--number { color: lighten(#e18728, 20%); }
  &--unit { color: lighten(#be4c39, 20%); }
}

@media (min-aspect-ratio: 1/1) {
  .panel:first-of-type {
    float: right;
  }
}

@media (max-aspect-ratio: 1/1) {
  @media (min-width: 30em) {
    .controls {
      overflow: hidden;
    }
    .sub {
      float: left;
    }
  }
  
  @media (min-width: 45em) {
    .controls, .codebox {
      float: left;
    }
    .panel:first-of-type {
      overflow: hidden;
    }
  }
}
            
          
!
            
              Object.getOwnPropertyNames(Math).map(function(p) {
  window[p] = Math[p];
});

if(!sign) {
  var sign = function(n) { return n/abs(n); };
}

var rad = function(val, unit) {
  var val = val || 0, 
      unit = 'deg';
  
  if(unit === 'deg') { return val*PI/180; }
  if(unit === 'rad') { return val; }
  if(unit === 'turn') { return val*2*PI; }
  if(unit === 'grad') { return val*PI/200; }
};

var deg = function(val, unit) {
  var val = val || 0, 
      unit = 'rad';
  
  if(unit === 'deg') { return val; }
  if(unit === 'rad') { return val*180/PI; }
  if(unit === 'turn') { return val*360; }
  if(unit === 'grad') { return val*9/10; }
};

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

var target = document.querySelector('g.final'), 
    codebox = document.querySelector('.codebox'),
    sar = document.getElementById('a'), 
    ac = document.querySelectorAll('.ac'), 
    sel1 = '.point.initial', 
    p1 = document.querySelector(sel1), 
    sel2 = '.point.final', 
    p2 = document.querySelector(sel2), 
    cl = document.querySelector('.conn'), 
    arc = document.querySelector('.arc'), 
    α = rad(sar.value), 
    axis = 'X', r = 80;

var tokenize = function(str) {
  var s = "<span class='token token--", 
      m = "'>", e = '</span>', 
      f = ' contenteditable ',
      tt = [ /* token types */
        'property', 'punctuation', 'value', 
        'function', 'argument', 'number', 'unit'
      ], 
      re = /([a-z]+)(\:)\s*([a-zA-Z]+)(\()(-?[0-9]*\.?[0-9]+)([a-z]*)(\))(;)?/;
    
  str = str.replace(re, 
   s + tt[0] + m + '$1' + e + 
   s + tt[1] + m + '$2' + e + ' ' + 
   s + tt[2] + m + 
     s + tt[3] + m + '$3' + e + 
     s + tt[1] + m + '$4' + e + 
     s + tt[4] + m + 
       s + tt[5] + "'" + f + '>$5' + e + 
       s + tt[6] + "'" + f + '>$6' + e + e + 
     s + tt[1] + m + '$7' + e + e + 
   s + tt[1] + m + '$8' + e);
      
  return str;
};

var updateAxis = function() {
  axis = this.id.toUpperCase();
  updateCode();
  updateSVG();
};

var updateAngleVal = function() {
  α = rad(sar.value);
  updateCode();
  updateSVG();
};

var updateCode = function() {
  var valsel = '.token--value', 
      valel = codebox.querySelector(valsel);
    
  valel.textContent = 'skew' + axis + 
    '(' + sar.value + 'deg)';
  
  codebox.innerHTML = tokenize(codebox.textContent);
};

var updateSVG = function() {
  var newval = 'skew' + axis + 
      				 '(' + sar.value + ')', 
      sgn = sign(α), d;
  
  target.setAttribute('transform', newval);
  
  if(target.classList) {
    if(target.classList.contains('dir--x') && 
       axis !== 'X') {
      target.classList.remove('dir--x');
      target.classList.add('dir--y');
    }
    if(target.classList.contains('dir--y') && 
       axis !== 'Y') {
      target.classList.remove('dir--y');
      target.classList.add('dir--x');
    }
  }
  else {
    if((target.className.baseVal.indexOf('x') !== -1 || 
        target.className.animVal.indexOf('x') !== -1) && 
       axis !== 'X') {
      target.className.baseVal = 
        target.className.baseVal.replace('x', 'y');
      target.className.animVal = 
        target.className.animVal.replace('x', 'y');
    }
    if((target.className.baseVal.indexOf('y') !== -1 || 
        target.className.animVal.indexOf('y') !== -1) && 
       axis !== 'Y') {
      target.className.baseVal = 
        target.className.baseVal.replace('y', 'x');
      target.className.animVal = 
        target.className.animVal.replace('y', 'x');
    }
  }
  
  if(axis == 'X' && abs(α) > .01) {
    d = 'M' + r*sin(α) + ' ' + r*cos(α) + 
      'A' + r + ' ' + r + 
      ' 0 0 ' + (sgn + 1)/2 + ' 0 ' + r;
    
    if(abs(α) > PI/12) {
      d += 'L' + sgn*15 + ' ' + (r - 10) + 
        'L' + sgn*10 + ' ' + r + 
        'L' + sgn*15 + ' ' + (r + 10) + 
        'L0 ' + r + 
        'A' + r + ' ' + r + 
        ' 0 0 ' + (-sgn + 1)/2 + ' ' + 
        r*sin(α) + ' ' + r*cos(α);
    }
  }
  if(axis === 'Y' && abs(α) > .01) {
    d = 'M' + r*cos(α) + ' ' + r*sin(α) + 
      'A' + r + ' ' + r + 
      ' 0 0 ' + (-sgn + 1)/2 + ' ' + r + ' 0';
    if(abs(α) > PI/12) {
      d += 'L' + (r - 10) + ' ' + sgn*15 + 
        'L' + r + ' ' + sgn*10 + 
        'L' + (r + 10) + ' ' + sgn*15 + 
        'L' + r + ' 0' + 
        'A' + r + ' ' + r + 
        ' 0 0 ' + (sgn + 1)/2 + ' ' + 
        r*cos(α) + ' ' + r*sin(α);
    }
  }
  
  arc.setAttribute('d', d);
  
  updatePoint();
};

var updatePoint = function() {
  var x, y, a, sgn, d = 'M', 
      r1 = ~~p1.getAttribute('r'), 
      r2 = ~~p2.getAttribute('r');
  
  x = ~~p1.getAttribute('cx');
  y = ~~p1.getAttribute('cy');
  
  if(axis === 'X') {   
    a = round(y*tan(α));
    sgn = sign(a);
    d += (x + sgn*r1) + ' ' + y + 'L';
    
    x += a;
    
    d += (x - sgn*r2) + ' ' + y + 
      'L' + (x - sgn*(r2 + 15)) + ' ' + (y - 10) + 
      'L' + (x - sgn*(r2 + 10)) + ' ' + y + 
      'L' + (x - sgn*(r2 + 15)) + ' ' + (y + 10) + 
      'L' + (x - sgn*r2) + ' ' + y;
        
    p2.setAttrs({'cx': x, 'cy': y});
    cl.setAttribute('d', d);
  }
  if(axis === 'Y') {
    a = round(x*tan(α));
    sgn = sign(a);
    d += x + ' ' + (y + sgn*r1) + 'L';
    
    y += a;
    
    d += x + ' ' + (y - sgn*r2) + 
      'L' + (x - 10) + ' ' + (y - sgn*(r2 + 15)) + 
      'L' + x + ' ' + (y - sgn*(r2 + 10)) + 
      'L' + (x + 10) + ' ' + (y - sgn*(r2 + 15)) + 
      'L' + x + ' ' + (y - sgn*r2);
    
    p2.setAttrs({'cx': x, 'cy': y});
    cl.setAttribute('d', d);
  }
  
  if(cl.getTotalLength() < 75) {
    cl.style.opacity = .001;
  }
  else { cl.style.opacity = .999; }
};

codebox.innerHTML = tokenize(codebox.textContent);

sar.addEventListener('change', updateAngleVal, 
                     false);
sar.addEventListener('input', updateAngleVal, 
                     false);
ac[0].addEventListener('change', updateAxis, 
                     false);
ac[1].addEventListener('change', updateAxis, 
                     false);
            
          
!
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