css Audio - Active file-generic CSS - Active Generic - Active HTML - Active JS - Active SVG - Active Text - Active file-generic Video - Active header Love html icon-new-collection icon-person icon-team numbered-list123 pop-out spinner split-screen star tv

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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.

            
              <div class="container">
  <canvas></canvas>
  <p><a href="https://dribbble.com/shots/4217116-Little-Forest">Original design by Alex Pasquarella</a></p>
  <p><button class="reset-button">Reset</button></p>
</div>
            
          
!
            
              html { height: 100%; }

body {
  min-height: 100%;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #313;
  color: white;
  font-family: sans-serif;
  font-size: 14px;
  text-align: center;
  cursor: move;
}

canvas {
  display: block;
  margin: 0px auto 20px;
}

a { color: #936; }
a:hover { color: #D65; }

button {
  background: #525;
  color: white;
  font-size: 14px;
  font-family: inherit;
  border: none;
  border-radius: 3px;
  padding: 8px 10px;
}

button:hover {
  background: #936;
  cursor: pointer;
}

            
          
!
            
              // Hi! This 3D model was built using the <canvas> 2D drawing API.
// It uses lineWidth to give the illusion of form.
// I'm working on a library to make these sort of 3D illustrations,
// But it's not ready for prime-time. Stay tuned! *~ dd ~*

// -------------------------- utils -------------------------- //

var TAU = Math.PI * 2;

function extend( a, b ) {
  for ( var prop in b ) {
    a[ prop ] = b[ prop ];
  }
  return a;
}

function lerp( a, b, t ) {
  return ( b - a ) * t + a;
}

function modulo( num, div ) {
  return ( ( num % div ) + div ) % div;
}

// -------------------------- Vector3 -------------------------- //

function Vector3( position ) {
  this.set( position );
}

Vector3.prototype.set = function( pos ) {
  pos = Vector3.sanitize( pos );
  this.x = pos.x;
  this.y = pos.y;
  this.z = pos.z;
  return this;
};

Vector3.prototype.rotate = function( rotation ) {
  if ( !rotation ) {
    return;
  }
  this.rotateZ( rotation.z );
  this.rotateY( rotation.y );
  this.rotateX( rotation.x );
  return this;
};

Vector3.prototype.rotateZ = function( angle ) {
  rotateProperty( this, angle, 'x', 'y' );
};

Vector3.prototype.rotateX = function( angle ) {
  rotateProperty( this, angle, 'y', 'z' );
};

Vector3.prototype.rotateY = function( angle ) {
  rotateProperty( this, angle, 'x', 'z' );
};

function rotateProperty( vec, angle, propA, propB ) {
  if ( angle % TAU === 0 ) {
    return;
  }
  var cos = Math.cos( angle );
  var sin = Math.sin( angle );
  var a = vec[ propA ];
  var b = vec[ propB ];
  vec[ propA ] = a*cos - b*sin;
  vec[ propB ] = b*cos + a*sin;
}

Vector3.prototype.add = function( vec ) {
  if ( !vec ) {
    return;
  }
  vec = Vector3.sanitize( vec );
  this.x += vec.x;
  this.y += vec.y;
  this.z += vec.z;
  return this;
};

Vector3.prototype.multiply = function( vec ) {
  if ( !vec ) {
    return;
  }
  vec = Vector3.sanitize( vec );
  this.x *= vec.x;
  this.y *= vec.y;
  this.z *= vec.z;
  return this;
};

Vector3.prototype.lerp = function( vec, t ) {
  this.x = lerp( this.x, vec.x, t );
  this.y = lerp( this.y, vec.y, t );
  this.z = lerp( this.z, vec.z, t );
  return this;
};

// ----- utils ----- //

// add missing properties
Vector3.sanitize = function( vec ) {
  vec = vec || {};
  vec.x = vec.x || 0;
  vec.y = vec.y || 0;
  vec.z = vec.z || 0;
  return vec;
};

// -------------------------- PathAction -------------------------- //

function PathAction( method, points, previousPoint ) {
  this.method = method;
  this.points = points.map( mapVectorPoint );
  this.renderPoints = points.map( mapVectorPoint );
  this.previousPoint = previousPoint;
  this.endRenderPoint = this.renderPoints[ this.renderPoints.length - 1 ];
  // arc actions come with previous point & corner point
  // but require bezier control points
  if ( method == 'arc' ) {
    this.controlPoints = [ new Vector3(), new Vector3() ];
  }
}

function mapVectorPoint( point ) {
  return new Vector3( point );
}

PathAction.prototype.reset = function() {
  // reset renderPoints back to orignal points position
  var points = this.points;
  this.renderPoints.forEach( function( renderPoint, i ) {
    var point = points[i];
    renderPoint.set( point );
  });
};

PathAction.prototype.transform = function( translation, rotation, scale ) {
  this.renderPoints.forEach( function( renderPoint ) {
    renderPoint.multiply( scale );
    renderPoint.rotate( rotation );
    renderPoint.add( translation );
  });
};

PathAction.prototype.render = function( ctx ) {
  this[ this.method ]( ctx );
};

PathAction.prototype.move = function( ctx ) {
  var point = this.renderPoints[0];
  ctx.moveTo( point.x, point.y );
};

PathAction.prototype.line = function( ctx ) {
  var point = this.renderPoints[0];
  ctx.lineTo( point.x, point.y );
};

PathAction.prototype.bezier = function( ctx ) {
  var cp0 = this.renderPoints[0];
  var cp1 = this.renderPoints[1];
  var end = this.renderPoints[2];
  ctx.bezierCurveTo( cp0.x, cp0.y, cp1.x, cp1.y, end.x, end.y );
};

PathAction.prototype.arc = function( ctx ) {
  var prev = this.previousPoint;
  var corner = this.renderPoints[0];
  var end = this.renderPoints[1];
  var cp0 = this.controlPoints[0];
  var cp1 = this.controlPoints[1];
  cp0.set( prev ).lerp( corner, 9/16 );
  cp1.set( end ).lerp( corner, 9/16 );
  ctx.bezierCurveTo( cp0.x, cp0.y, cp1.x, cp1.y, end.x, end.y );
};


// -------------------------- Shape -------------------------- //

function Shape( options ) {
  this.create( options );
}

Shape.prototype.create = function( options ) {
  // default
  extend( this, Shape.defaults );
  // set options
  setOptions( this, options );

  this.updatePathActions();

  // transform
  this.translate = new Vector3( options.translate );
  this.rotate = new Vector3( options.rotate );
  var scale = extend( { x: 1, y: 1, z: 1 }, options.scale );
  this.scale = new Vector3( scale );
  // children
  this.children = [];
  if ( this.addTo ) {
    this.addTo.addChild( this );
  }
};

Shape.defaults = {
  stroke: true,
  fill: false,
  color: 'black',
  lineWidth: 1,
  closed: true,
  rendering: true,
  path: [ {} ],
};

var optionKeys = Object.keys( Shape.defaults ).concat([
  'rotate',
  'translate',
  'scale',
  'addTo',
  'width',
  'height',
]);

function setOptions( shape, options ) {
  for ( var key in options ) {
    if ( optionKeys.includes( key ) ) {
      shape[ key ] = options[ key ];
    }
  }
}

var actionNames = [
  'move',
  'line',
  'bezier',
  'arc',
];

// parse path into PathActions
Shape.prototype.updatePathActions = function() {
  var previousPoint;
  this.pathActions = this.path.map( function( pathPart, i ) {
    // pathPart can be just vector coordinates -> { x, y, z }
    // or path instruction -> { arc: [ {x0,y0,z0}, {x1,y1,z1} ] }
    var keys = Object.keys( pathPart );
    var method = keys[0];
    var points = pathPart[ method ];
    var isInstruction = keys.length === 1 && actionNames.includes( method ) &&
      Array.isArray( points );

    if ( !isInstruction ) {
      method = 'line';
      points = [ pathPart ];
    }

    // first action is always move
    method = i === 0 ? 'move' : method;
    // arcs require previous last point
    var pathAction = new PathAction( method, points, previousPoint );
    // update previousLastPoint
    previousPoint = pathAction.endRenderPoint;
    return pathAction;
  });
};

Shape.prototype.addChild = function( shape ) {
  this.children.push( shape );
};

// ----- update ----- //

Shape.prototype.update = function() {
  // update self
  this.reset();
  // update children
  this.children.forEach( function( child ) {
    child.update();
  });
  this.transform( this.translate, this.rotate, this.scale );
};

Shape.prototype.reset = function() {
  // reset pathAction render points
  this.pathActions.forEach( function( pathAction ) {
    pathAction.reset();
  });
};

Shape.prototype.transform = function( translation, rotation, scale ) {
  // transform points
  this.pathActions.forEach( function( pathAction ) {
    pathAction.transform( translation, rotation, scale );
  });
  // transform children
  this.children.forEach( function( child ) {
    child.transform( translation, rotation, scale );
  });
};

Shape.prototype.updateSortValue = function() {
  var sortValueTotal = 0;
  this.pathActions.forEach( function( pathAction ) {
    sortValueTotal += pathAction.endRenderPoint.z;
  });
  // average sort value of all points
  // def not geometrically correct, but works for me
  this.sortValue = sortValueTotal / this.pathActions.length;
};

// ----- render ----- //

Shape.prototype.render = function( ctx ) {
  var length = this.pathActions.length;
  if ( !this.rendering || !length ) {
    return;
  }
  var isDot = length == 1;
  if ( isDot ) {
    this.renderDot( ctx );
  } else {
    this.renderPath( ctx );
  }
};

// Safari does not render lines with no size, have to render circle instead
Shape.prototype.renderDot = function( ctx ) {
  ctx.fillStyle = this.color;
  var point = this.pathActions[0].endRenderPoint;
  ctx.beginPath();
  var radius = this.lineWidth/2;
  ctx.arc( point.x, point.y, radius, 0, TAU );
  ctx.fill();
};

Shape.prototype.renderPath = function( ctx ) {
  // set render properties
  ctx.fillStyle = this.color;
  ctx.strokeStyle = this.color;
  ctx.lineWidth = this.lineWidth;

  // render points
  ctx.beginPath();
  this.pathActions.forEach( function( pathAction ) {
    pathAction.render( ctx );
  });
  var isTwoPoints = this.pathActions.length == 2 &&
    this.pathActions[1].method == 'line';
  if ( !isTwoPoints && this.closed ) {
    ctx.closePath();
  }
  if ( this.stroke ) {
    ctx.stroke();
  }
  if ( this.fill ) {
    ctx.fill();
  }
};

// return Array of self & all child shapes
Shape.prototype.getShapes = function() {
  var shapes = [ this ];
  this.children.forEach( function( child ) {
    var childShapes = child.getShapes();
    shapes = shapes.concat( childShapes );
  });
  return shapes;
};

Shape.prototype.copy = function( options ) {
  // copy options
  var shapeOptions = {};
  optionKeys.forEach( function( key ) {
    shapeOptions[ key ] = this[ key ];
  }, this );
  // add set options
  setOptions( shapeOptions, options );
  var ShapeClass = this.constructor;
  return new ShapeClass( shapeOptions );
};

Shape.prototype.normalizeRotate = function() {
  this.rotate.x = modulo( this.rotate.x, TAU );
  this.rotate.y = modulo( this.rotate.y, TAU );
  this.rotate.z = modulo( this.rotate.z, TAU );
};

// -------------------------- Group -------------------------- //

function Group( options ) {
  this.create( options );
}

Group.prototype.create = function( options ) {
  // set options
  setGroupOptions( this, options );

  // transform
  this.translate = Vector3.sanitize( this.translate );
  this.rotate = Vector3.sanitize( this.rotate );
  // children
  this.children = [];
  if ( this.addTo ) {
    this.addTo.addChild( this );
  }
};

var groupOptionKeys = [
  'rotate',
  'translate',
  'addTo',
];

function setGroupOptions( shape, options ) {
  for ( var key in options ) {
    if ( groupOptionKeys.includes( key ) ) {
      shape[ key ] = options[ key ];
    }
  }
}


Group.prototype.addChild = function( shape ) {
  this.children.push( shape );
};

// ----- update ----- //

Group.prototype.update = function() {
  // update self
  this.reset();
  // update children
  this.children.forEach( function( child ) {
    child.update();
  });
  this.transform( this.translate, this.rotate, this.scale );
};

Group.prototype.reset = function() {};

Group.prototype.transform = function( translation, rotation, scale ) {
  // transform children
  this.children.forEach( function( child ) {
    child.transform( translation, rotation, scale );
  });
};

Group.prototype.updateSortValue = function() {
  var sortValueTotal = 0;
  this.children.forEach( function( child ) {
    child.updateSortValue();
    sortValueTotal += child.sortValue;
  });
  // TODO sort children?
  // average sort value of all points
  // def not geometrically correct, but works for me
  this.sortValue = sortValueTotal / this.children.length;
};

// ----- render ----- //

Group.prototype.render = function( ctx ) {
  this.children.forEach( function( child ) {
    child.render( ctx );
  });
};

// do not include children, group handles rendering & sorting internally
Group.prototype.getShapes = function() {
  return [ this ];
};

// -------------------------- Ellipse -------------------------- //

function Ellipse( options ) {
  options = this.setPath( options );
  // always keep open
  // fixes overlap bug when lineWidth is greater than radius
  options.closed = false;
  this.create( options );
}

Ellipse.prototype = Object.create( Shape.prototype );
Ellipse.prototype.constructor = Ellipse;

Ellipse.prototype.setPath = function( options ) {
  var w = ( options.width || 1 ) / 2;
  var h = ( options.height || 1 ) / 2;
  options.path = [
    { x: 0, y: -h },
    { arc: [ // top right
      { x: w, y: -h },
      { x: w, y: 0 },
    ]},
    { arc: [ // bottom right
      { x: w, y: h },
      { x: 0, y: h },
    ]},
    { arc: [ // bottom left
      { x: -w, y: h },
      { x: -w, y: 0 },
    ]},
    { arc: [ // bottom left
      { x: -w, y: -h },
      { x: 0, y: -h },
    ]},
  ];
  return options;
};

// -------------------------- Rect -------------------------- //

function Rect( options ) {
  options = this.setPath( options );
  this.create( options );
}

Rect.prototype = Object.create( Shape.prototype );
Rect.prototype.constructor = Rect;

Rect.prototype.setPath = function( options ) {
  var w = ( options.width || 1 ) / 2;
  var h = ( options.height || 1 ) / 2;
  options.path = [
    { x: -w, y: -h },
    { x:  w, y: -h },
    { x:  w, y:  h },
    { x: -w, y:  h },
  ];
  return options;
};

// -------------------------- Group -------------------------- //

function Group( options ) {
  this.create( options );
}

Group.prototype.create = function( options ) {
  // set options
  setGroupOptions( this, options );

  // transform
  this.translate = Vector3.sanitize( this.translate );
  this.rotate = Vector3.sanitize( this.rotate );
  // children
  this.children = [];
  if ( this.addTo ) {
    this.addTo.addChild( this );
  }
};

var groupOptionKeys = [
  'rotate',
  'translate',
  'addTo',
];

function setGroupOptions( shape, options ) {
  for ( var key in options ) {
    if ( groupOptionKeys.includes( key ) ) {
      shape[ key ] = options[ key ];
    }
  }
}


Group.prototype.addChild = function( shape ) {
  this.children.push( shape );
};

// ----- update ----- //

Group.prototype.update = function() {
  // update self
  this.reset();
  // update children
  this.children.forEach( function( child ) {
    child.update();
  });
  this.transform( this.translate, this.rotate, this.scale );
};

Group.prototype.reset = function() {};

Group.prototype.transform = function( translation, rotation, scale ) {
  // transform children
  this.children.forEach( function( child ) {
    child.transform( translation, rotation, scale );
  });
};

Group.prototype.updateSortValue = function() {
  var sortValueTotal = 0;
  this.children.forEach( function( child ) {
    child.updateSortValue();
    sortValueTotal += child.sortValue;
  });
  // TODO sort children?
  // average sort value of all points
  // def not geometrically correct, but works for me
  this.sortValue = sortValueTotal / this.children.length;
};

// ----- render ----- //

Group.prototype.render = function( ctx ) {
  this.children.forEach( function( child ) {
    child.render( ctx );
  });
};

// do not include children, group handles rendering & sorting internally
Group.prototype.getShapes = function() {
  return [ this ];
};

// -------------------------- Dragger -------------------------- //

// quick & dirty drag event stuff
// messes up if multiple pointers/touches

// event support, default to mouse events
var downEvent = 'mousedown';
var moveEvent = 'mousemove';
var upEvent = 'mouseup';
if ( window.PointerEvent ) {
  // PointerEvent, Chrome
  downEvent = 'pointerdown';
  moveEvent = 'pointermove';
  upEvent = 'pointerup';
} else if ( 'ontouchstart' in window ) {
  // Touch Events, iOS Safari
  downEvent = 'touchstart';
  moveEvent = 'touchmove';
  upEvent = 'touchend';
}

function noop() {}

function Dragger( options ) {
  this.startElement = options.startElement;
  this.onPointerDown = options.onPointerDown || noop;
  this.onPointerMove = options.onPointerMove || noop;
  this.onPointerUp = options.onPointerUp || noop;
  
  this.startElement.addEventListener( downEvent, this );
}

Dragger.prototype.handleEvent = function( event ) {
  var method = this[ 'on' + event.type ];
  if ( method ) {
    method.call( this, event );
  }
};

Dragger.prototype.onmousedown =
Dragger.prototype.onpointerdown = function( event ) {
  this.pointerDown( event, event );
};

Dragger.prototype.ontouchstart = function( event ) {
  this.pointerDown( event, event.changedTouches[0] );
};

Dragger.prototype.pointerDown = function( event, pointer ) {
  event.preventDefault();
  this.dragStartX = pointer.pageX;
  this.dragStartY = pointer.pageY;
  window.addEventListener( moveEvent, this );
  window.addEventListener( upEvent, this );
  this.onPointerDown( pointer );
};

Dragger.prototype.ontouchmove = function( event ) {
  // HACK, moved touch may not be first
  this.pointerMove( event, event.changedTouches[0] );
};

Dragger.prototype.onmousemove =
Dragger.prototype.onpointermove = function( event ) {
  this.pointerMove( event, event );
};

Dragger.prototype.pointerMove = function( event, pointer ) {
  event.preventDefault();
  var moveX = pointer.pageX - this.dragStartX;
  var moveY = pointer.pageY - this.dragStartY;
  this.onPointerMove( pointer, moveX, moveY );
};

Dragger.prototype.onmouseup = 
Dragger.prototype.onpointerup =
Dragger.prototype.ontouchend =
Dragger.prototype.pointerUp = function( event ) {
  window.removeEventListener( moveEvent, this );
  window.removeEventListener( upEvent, this );
  this.onPointerUp( event );
};

// -------------------------- demo -------------------------- //

var canvas = document.querySelector('canvas');
var ctx = canvas.getContext('2d');
var w = 360;
var h = 360;
var minWindowSize = Math.min( window.innerWidth, window.innerHeight );
var zoom = Math.min( 3, Math.floor( minWindowSize / (w/2) ) / 2 );
var pixelRatio = window.devicePixelRatio || 1;
zoom *= pixelRatio;
var canvasWidth = canvas.width = w * zoom;
var canvasHeight = canvas.height = h * zoom;
// set canvas screen size
if ( pixelRatio > 1 ) {
  canvas.style.width = canvasWidth / pixelRatio + 'px';
  canvas.style.height = canvasHeight / pixelRatio + 'px';
}

// colors
var midnight = '#313';
var eggplant = '#525';
var magenta = '#936';
var amber = '#D65';
var gold = '#FA6';
var white = '#FFF';

var camera = new Shape({
  rendering: false,
});

var layerSpace = 56;

// -- illustration shapes --- //

// background
var background = new Shape({
  translate: { z: layerSpace*2 },
  rendering: false,
  addTo: camera,
});

var bgStripe = new Rect({
  width: 180,
  height: 44,
  addTo: background,
  translate: { y: -40, z: 24 },
  color: magenta,
  lineWidth: 12,
  fill: true,
});
// magenta circle
var bgCircle = new Ellipse({
  width: 96,
  height: 96,
  addTo: background,
  translate: { y: -16, z: 24 },
  color: magenta,
  lineWidth: 24,
  fill: true,
});

// amber stripe
bgStripe.copy({
  translate: { y: -8 },
  color: amber,
});
// amber circle
bgCircle.copy({
  width: 64,
  height: 64,
  translate: { y: -16, },
  color: amber,
});

// gold bg stripe
bgStripe.copy({
  height: 60,
  addTo: background,
  translate: { y: 32, z: -24 },
  color: gold,
});
// gold circle
bgCircle.copy({
  width: 32,
  height: 32,
  translate: { y: -16, z: -24 },
  color: gold,
});

// sun
new Shape({
  addTo: background,
  translate: { y: -16, z: -48 },
  lineWidth: 24,
  color: white,
});

// ----- midBackground ----- //

var midBackground = new Group({
  addTo: camera,
  translate: { z: layerSpace*1 },
});

var midBGDot = new Shape({
  addTo: midBackground,
  translate: { x: -36, y: 18 },
  lineWidth: 24,
  color: amber,
});
midBGDot.copy({
  translate: { x: -24, y: 24 },
});
midBGDot.copy({
  translate: { x: -6, y: 26 },
});
midBGDot.copy({
  translate: { x: 12, y: 16 },
});
midBGDot.copy({
  translate: { x: 28, y: 12 },
});
midBGDot.copy({
  translate: { x: 48, y: 20 },
});

var midBGBigDot = midBGDot.copy({
  lineWidth: 48,
  translate: { x: -52, y: 40 },
});
midBGBigDot.copy({
  translate: { x: 20, y: 40 },
});
midBGBigDot.copy({
  lineWidth: 40,
  translate: { x: 56, y: 40 },
});
midBGBigDot.copy({
  lineWidth: 40,
  translate: { x: -16, y: 48 },
});

// ----- midground ----- //

var midground = new Shape({
  rendering: false,
  addTo: camera,
});

var midgroundGroundA = new Shape({
  path: [
    { x: -96, y: 10 },
    { x: -86, y: 10 },
    { arc: [
      { x: -60, y: 42 },
      { x: -26, y: 42 },
    ]},
    { x: -26, y: 74 },
    { x: -96, y: 74 },
  ],
  addTo: midground,
  color: magenta,
  lineWidth: 48,
  fill: true,
});
midgroundGroundA.copy({
  path: [
    { x: -26, y: 42 },
    { arc: [
      { x: -8, y: 74 },
      { x: 36, y: 74 },
    ]},
    { x: 96, y: 74 },
    { x: -26, y: 74 },
  ],
});

function tree( groupOptions, options ) {
  options = extend( options, groupOptions );
  var treeW = options.width/2;
  var treeH = options.height/2;

  var pointA = { x: 0, y: -treeH };
  var pointB = { x: treeW, y: treeH };
  var pointC = { x: -treeW, y: treeH };

  var treeOptions = extend({
    path: [
      pointA,
      { bezier: [
        pointA,
        { x: treeW, y: treeH*1/3 },
        pointB,
      ]},
      pointC,
      { bezier: [
        { x: -treeW, y: treeH*1/3 },
        pointA,
        pointA,
      ]},
    ],
    fill: true,
  }, options );

  var treePlane = new Shape( treeOptions );
  treePlane.copy({
    rotate: { y: TAU/4 },
  });

}

var midgroundTree = {
  addTo: midground,
  color: magenta,
  lineWidth: 2,
};

tree( midgroundTree, {
  width: 10,
  height: 24,
  translate: { x: -86, y: -14, z: 8 },
});

tree( midgroundTree, {
  width: 16,
  height: 36,
  translate: { x: -70, y: -12, z: -14 },
});

tree( midgroundTree, {
  width: 10,
  height: 24,
  translate: { x: -60, y: -4 },
});

tree( midgroundTree, {
  width: 10,
  height: 24,
  translate: { x: -26, y: 12, z: 8 },
});

tree( midgroundTree, {
  width: 10,
  height: 24,
  translate: { x: -18, y: 18, z: -2 },
});

var lonelyTranslate = { x: 32, y: 24 };

tree( midgroundTree, {
  width: 16,
  height: 36,
  translate: lonelyTranslate,
});
// lonely tree stump
new Shape({
  path: [
    { y: 18 },
    { y: 28 },
  ],
  addTo: midground,
  translate: lonelyTranslate,
  color: magenta,
  lineWidth: 4,
});


tree( midgroundTree, {
  width: 10,
  height: 24,
  translate: { x: 64, y: 40, z: -6 },
});
tree( midgroundTree, {
  width: 10,
  height: 24,
  translate: { x: 72, y: 44, z: 2 },
});

// ----- midForeground ----- //

var midForeground = new Shape({
  rendering: false,
  addTo: camera,
  translate: { z: -layerSpace },
});

// midForeground ground part A
var midForegroundGround = new Shape({
  path: [
    { x: 96, y: 26 },
    { x: 72, y: 26 },
    { arc: [
      { x: 56, y: 50 },
      { x: 18, y: 50 },
    ]},
    { x: 18, y: 90 },
    { x: 96, y: 90 },
  ],
  addTo: midForeground,
  color: eggplant,
  lineWidth: 48,
  fill: true,
});
midForegroundGround.copy({
  path: [
    { x: 18, y: 50 },
    { arc: [
      { x: -16, y: 90 },
      { x: -48, y: 72 },
    ]},
    { x: -64, y: 56 },
    { x: -96, y: 48 },
    { x: -96, y: 90 },
    { x: 18, y: 90 },
  ],
});

var midForeBall = new Shape({
  addTo: midForeground,
  translate: { x: -92, y: 18 },
  lineWidth: 20,
  color: eggplant,
});
midForeBall.copy({
  translate: { x: -104, y: 28 },
});
midForeBall.copy({
  translate: { x: -84, y: 28 },
  lineWidth: 24,
});
midForeBall.copy({
  translate: { x: -74, y: 20 },
});
midForeBall.copy({
  translate: { x: -60, y: 28 },
});
midForeBall.copy({
  translate: { x: -50, y: 36 },
});
midForeBall.copy({
  translate: { x: -44, y: 46 },
});

var midForeTree = {
  addTo: midForeground,
  color: eggplant,
  lineWidth: 2,
};

tree( midForeTree, {
  width: 10,
  height: 24,
  translate: { x: -12, y: 42 },
});
tree( midForeTree, {
  width: 10,
  height: 24,
  translate: { x: 10, y: 22, z: -2 },
});
tree( midForeTree, {
  width: 16,
  height: 36,
  translate: { x: 22, y: 18, z: 6 },
});

tree( midForeTree, {
  width: 16,
  height: 36,
  translate: { x: 76, y: -6, z: -12 },
});
tree( midForeTree, {
  width: 10,
  height: 24,
  translate: { x: 86, y: -4, z: 10 },
});

// ----- foregroundA ----- //

var foregroundA = new Shape({
  path: [
    { x: -96, y: 52 },
    { x: -84, y: 52 },
    { arc: [
      { x: -72, y: 72 },
      { x: -44, y: 72 },
    ]},
    { arc: [
      { x: -32, y: 90 },
      { x: 0, y: 90 },
    ]},
    { x: -96, y: 90 },
  ],
  addTo: camera,
  translate: { z: -layerSpace*2 },
  color: midnight,
  lineWidth: 48,
  fill: true,
});

var foregroundTree = {
  color: midnight,
  lineWidth: 2,
};

tree( foregroundTree, {
  addTo: foregroundA,
  width: 18,
  height: 44,
  translate: { x: -80, y: 18 },
});

var foreTree1Translate = { x: -44, y: 14 };
tree( foregroundTree, {
  addTo: foregroundA,
  width: 18,
  height: 44,
  translate: { x: -44, y: 14 },
});
// trunk
new Shape({
  path: [
    { y: 22 },
    { y: 38 },
  ],
  addTo: foregroundA,
  translate: foreTree1Translate,
  lineWidth: 6,
  color: midnight,
});

tree( foregroundTree, {
  addTo: foregroundA,
  width: 16,
  height: 36,
  translate: { x: -2, y: 64 },
});

var grassBlade = new Shape({
  path: [
    // semi-circle outside on left
    { x: 0, y: 1 },
    { arc: [
      { x: -1, y: 1 },
      { x: -1, y: 0 },
    ]},
    { arc: [
      { x: -1, y: -1 },
      { x:  0, y: -1 },
    ]},
    // shallow semi-circle back
    { arc: [
      { x: -0.5, y: -0.7 },
      { x: -0.5, y: 0 },
    ]},
    { arc: [
      { x: -0.5, y: 0.7 },
      { x: 0, y: 1 },
    ]},
  ],
  addTo: foregroundA,
  translate: { x: -20, y: 56 },
  scale: { x: 8, y: 8 },
  rotate: { z: 0.6 },
  color: midnight,
  lineWidth: 1,
  fill: true,
  closed: false,
});
grassBlade.copy({
  translate: { x: -33, y: 50 },
  rotate: { z: TAU/2 + 0.2 }
});

grassBlade.copy({
  translate: { x: -62, y: 40 },
  rotate: { z: 0.8 },
  scale: { x: 7, y: 7 },
});

grassBlade.copy({
  translate: { x: -64, y: 35 },
  rotate: { z: 0.4 },
  scale: { x: 7, y: 7 },
});

// ----- foregroundB ----- //

var foregroundB = new Shape({
  path: [
    { x: 96, y: 52 },
    { arc: [
      { x: 80, y: 72 },
      { x: 56, y: 72 },
    ]},
    { arc: [
      { x: 40, y: 90 },
      { x: 8, y: 90 },
    ]},
    { x: 0, y: 90 },
    { x: 96, y: 90 },
  ],
  addTo: camera,
  translate: { z: -layerSpace*2 },
  color: midnight,
  lineWidth: 48,
  fill: true,
});

tree( foregroundTree, {
  addTo: foregroundB,
  width: 16,
  height: 36,
  translate: { x: 10, y: 54 },
});

// big tree
var bigTreeTranslate = { x: 58, y: 2 };
tree( foregroundTree, {
  addTo: foregroundB,
  width: 20,
  height: 64,
  translate: bigTreeTranslate,
});
// big tree trunk
new Shape({
  path: [
    { y: 32 },
    { y: 48 },
  ],
  addTo: foregroundB,
  translate: bigTreeTranslate,
  lineWidth: 6,
  color: midnight,
});

tree( foregroundTree, {
  addTo: foregroundB,
  width: 16,
  height: 36,
  translate: { x: 86, y: 26 },
});

grassBlade.copy({
  addTo: foregroundB,
  scale: { x: 12, y: 12 },
  translate: { x: 46, y: 54 },
  rotate: { z: 0 },
});
grassBlade.copy({
  addTo: foregroundB,
  scale: { x: 10, y: 10 },
  translate: { x: 28, y: 58 },
  rotate: { z: TAU/2 - 0.4 },
});

// ----- particles ----- //

var particle = new Shape({
  addTo: camera,
  translate: { x: -70, y: -50, z: layerSpace*0.25 },
  lineWidth: 4,
  color: gold,
});
particle.copy({
  translate: { x: 68, y: -28, z: layerSpace*-0.5 },
});
particle.copy({
  translate: { x: -70, y: 2, z: layerSpace*-0.75 },
  color: amber,
});
particle.copy({
  translate: { x: 74, y: 14, z: layerSpace*-1.5 },
});
particle.copy({
  translate: { x: -24, y: 34, z: layerSpace*-1.75 },
});
particle.copy({
  translate: { x: 34, y: 34, z: layerSpace*-1.9 },
  color: amber,
});
particle.copy({
  translate: { x: 22, y: 40, z: layerSpace*-2.2 },
});

// ----- clouds ----- //

var twoCloud = new Shape({
  path: [
    { x: -20, y: 0 },
    { bezier: [
      { x: -13, y: 0 },
      { x: -12, y: -4 },
      { x: -10, y: -4 },
    ]},
    { bezier: [
      { x: -8, y: -4 },
      { x: -8, y: -2 },
      { x: -4, y: -2 },
    ]},
    { bezier: [
      { x: 0, y: -2 },
      { x: 1, y: -6 },
      { x: 4, y: -6 },
    ]},
    { bezier: [
      { x: 7, y: -6 },
      { x: 6, y: 0 },
      { x: 20, y: 0 },
    ]},
  ],
  addTo: camera,
  translate: { x: -84, y: -38, z: layerSpace*1 },
  rotate: { y: TAU*1/16 },
  scale: { x: 1/Math.cos(TAU*1/16) },
  lineWidth: 4,
  color: white,
  fill: true,
});

twoCloud.copy({
  translate: { x: -38, y: -22, z: layerSpace*0.5 },
  rotate: { y: TAU*1/8 },
  scale: { x: 1/Math.cos(TAU*1/8) * -1 },
});

// triple cloud
new Shape({
  path: [
    { x: -32, y: 0 },
    { x: -28, y: 0 },
    { bezier: [
      { x: -22, y: 0 },
      { x: -20, y: -6 },
      { x: -16, y: -6 },
    ]},
    { bezier: [
      { x: -12, y: -6 },
      { x: -12, y: -2 },
      { x: -8, y: -2 },
    ]},
    { bezier: [
      { x: -4, y: -2 },
      { x: -4, y: -6 },
      { x: 0, y: -6 },
    ]},
    { bezier: [
      { x: 4, y: -6 },
      { x: 4, y: -2 },
      { x: 8, y: -2 },
    ]},
    { bezier: [
      { x: 12, y: -2 },
      { x: 12, y: -6 },
      { x: 16, y: -6 },
    ]},
    { bezier: [
      { x: 20, y: -6 },
      { x: 22, y: 0 },
      { x: 28, y: 0 },
    ]},
    { x: 32, y: 0 },
  ],
  addTo: camera,
  translate: { x: 72, y: -52, z: layerSpace*1 },
  rotate: { y: TAU * -1/16 },
  scale: { x: 1/Math.cos(TAU * -1/16) },
  lineWidth: 4,
  color: white,
  fill: true,
});

// ----- stars ----- //

var starA = new Shape({
  path: [
    { x: 0, y: -4 },
    { arc: [
      { x: 0, y: 0 },
      { x: 4, y: 0 },
    ]},
    { arc: [
      { x: 0, y: 0 },
      { x: 0, y: 4 },
    ]},
    { arc: [
      { x: 0, y: 0 },
      { x: -4, y: 0 },
    ]},
    { arc: [
      { x: 0, y: 0 },
      { x: 0, y: -4 },
    ]},
  ],
  addTo: camera,
  translate: { x: -50, y: -50, z: layerSpace*1.5 },
  color: gold,
  lineWidth: 2,
  fill: true,
});
starA.copy({
  rotate: { y: TAU/4 },
});

var starB = starA.copy({
  translate: { x: 42, y: -20, z: layerSpace*0.5 },
});
starB.copy({
  rotate: { y: TAU/4 },
});

// ----- bird ----- //

new Shape({
  path: [
    { x: -6, y: -4 },
    { x: -4, y: -4 },
    { arc: [
      { x: 0, y: -4 },
      { x: 0, y: 0 },
    ]},
    { arc: [
      { x: 0, y: -4 },
      { x: 4, y: -4 },
    ]},
    { x: 6, y: -4 },
    { move: [{ z: -2, y: 0 }] },
    { z: 3, y: 0 },
  ],
  addTo: camera,
  translate: { x: 18, y: -30, z: layerSpace*1 },
  lineWidth: 3,
  color: midnight,
  closed: false,
});


// -----  ----- //

var shapes = camera.getShapes();

// -- animate --- //

var isRotating = true;
var t = 0;
var tSpeed = 1/320;

function animate() {
  update();
  render();
  requestAnimationFrame( animate );
}

animate();

// -- update -- //

function update() {
  if ( isRotating ) {
    t += tSpeed;
    var theta = easeInOut( t ) * TAU;
    camera.rotate.y = Math.sin( theta ) * TAU/32;
    camera.rotate.x = ( Math.cos( theta ) * -0.5 + 0.5 ) * TAU/32;
  }

  camera.update();
  // sort
  shapes.forEach( function( shape ) {
    shape.updateSortValue();
  });
  // perspective sort
  shapes.sort( function( a, b ) {
    return b.sortValue - a.sortValue;
  });
}

function easeInOut( i ) {
  i = i % 1;
  var isFirstHalf = i < 0.5;
  var i1 = isFirstHalf ? i : 1 - i;
  i1 = i1 / 0.5;
  // make easing steeper with more multiples
  var i2 = i1 * i1;
  i2 = i2 / 2;
  return isFirstHalf ? i2 : i2*-1 + 1;
}

// -- render -- //
ctx.lineCap = 'round';
ctx.lineJoin = 'round';

function render() {
  ctx.clearRect( 0, 0, canvasWidth, canvasHeight );
  ctx.save();
  ctx.scale( zoom, zoom );
  ctx.translate( w/2, h/2 );

  shapes.forEach( function( shape ) {
    shape.render( ctx );
  });

  ctx.restore();
}

// ----- inputs ----- //

// click drag to rotate
var dragStartAngleX, dragStartAngleY;

new Dragger({
  startElement: document,
  onPointerDown: function() {
    isRotating = false;
    dragStartAngleX = camera.rotate.x;
    dragStartAngleY = camera.rotate.y;
  },
  onPointerMove: function( pointer, moveX, moveY ) {
    var angleXMove = moveY / canvasWidth * TAU;
    var angleYMove = moveX / canvasWidth * TAU;
    camera.rotate.x = dragStartAngleX + angleXMove;
    camera.rotate.y = dragStartAngleY + angleYMove;
  },
});

document.querySelector('.reset-button').onclick = function() {
  isRotating = false;
  camera.rotate.set({ x: 0, y: 0 });
};

            
          
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