index.html

## index.html
<html>
    <head>
        <title>
            [Visualizing Movement Data with D3.js]
        </title>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
        <script src="mviz.js"></script>
        <style>
            * {
                box-sizing: border-box
            }

            body {
                margin: 0px;
            }

          svg {
            position: relative;
            left: calc(50% - 250px);
          }

          #c1 {
              position: relative;
              top: 100px;
          }


        </style>
    </head>
    <body>
        <div id="c1"></div>
        <script>run()</script>
    </body>
</html>

## mviz.js
// Variables
var skeleton;
var positions;
var figureScale = 2.2;
var h = 540;
var w = 500;
var gap = 0;
var skip = 1;
var traillength = 20;
//******************************************************************//

function run() {
    // Read the files
    console.log('Loading the data...');

    d3.json("https://omid.al/moveviz/data/ConnectivityMatrix_Antonio.json", function(error, json) {
        if (error) return console.warn(error);
        skeleton = json;
        d3.json("https://omid.al/moveviz/data/Improv_Antonio.json", function(error, json) {
            positions = json;
            positions.splice(0, 160);
            positions.splice(positions.length-190, 190);

             var frames = positions.map(function(ff, j) {
                return ff.map(function(d, i) {
                return {
                    x: (d.x + 80) * figureScale,
                    y: -1 * d.y * figureScale + h - 10,
                    z: d.z * figureScale
                };
                });
            });


            svg = draw(frames);

            var fr = 1/30;
            var startTimeJ = Date.now();

            anim0(frames.slice(0,traillength),svg);

            window.setInterval(function() {
                f = traillength + Math.floor((Date.now() - startTimeJ)/1000 / fr);

                if (f > frames.length) {
                    startTimeJ=Date.now();
                    f = 0;
                }
                segment = frames.slice(f-traillength,f);
                anim(segment,svg);

            }, fr * 1000);

        });
    });
}

function draw(frames) {
   console.log('Drawing...');
  // Prep the environment
  var parent = d3.select("body").select("#c1");
  var svg = parent.append("svg")
    .attr("id","svg")
    .attr("width", w)
    .attr("height", h)
    .attr("overflow", "scroll")
    .style("display", "inline-block");

  // Scale the data

  index = 30;

  // Joints
  headJoint = 15;

  svg.selectAll("g.joints")
    .data(frames.filter(function(d, i) {
      return i % skip == 0;
    }))
    .enter()
    .append("g")
    .attr("transform", function(d, i) {
      return "translate(" + (i * gap) + ",0)";
    })
    .selectAll("circle.f" + index)
    .data(function(d, i) {
      return d
    })
    .enter()
    .append("circle")
    .attr("cx", function(d) {
      return d.x;
    }).attr("cy", function(d) {
      return d.y;
    }).attr("r", function(d, i) {
      if (i == headJoint)
        return .8;
      else
        return .8;
    }).attr("fill",'grey')
    .attr("fill-opacity", function(d, j, k) {
    	if ((k * skip) < (frames.length/ 2))
        coef = (k * skip)/frames.length;
      else
        coef = (frames.length - (k * skip))/frames.length;
      return coef;
    });

    try {
	    if (window.top && window.top.loaded)
            window.top.loaded();
    } catch(err) {
        console.log(err);
    }

    return svg;
}

function anim0(frames, svg) {
  // Joints
  headJoint = 15;

  svg.selectAll("g.jointsanim")
    .data(frames)
    .enter()
    .append("g")
    .attr("class","jointsanim")
    .selectAll("circle.anim")
    .data(function(d, i) {
      return d;
    })
    .enter()
    .append("circle")
    .attr("class","anim")
    .attr("cx", function(d) {
      return d.x;
    }).attr("cy", function(d) {
      return d.y;
    }).attr("r", function(d, i) {
      if (i == headJoint)
        return .8;
      else
        return 1.8;
    })
    .attr("fill",'#cc6666')
    .attr("fill-opacity",1);


  // Bones

 svg.selectAll("g.boneanim")
    .data(frames)
    .enter()
    .append("g")
    .attr("class","boneanim")
    .selectAll("line.anim")
    .data(skeleton)
    .enter()
    .append("line")
    .attr("class","anim")
    .attr("stroke", "#cc6666")
    .attr("stroke-opacity", .8)
    .attr("stroke-width", 2)
    .attr("x1", function(d, j, k) {
      return frames[k][d[0]].x;
    })
    .attr("x2", function(d, j, k) {
      return frames[k][d[1]].x;
    })
    .attr("y1", function(d, j, k) {
      return frames[k][d[0]].y;
    })
    .attr("y2", function(d, j, k) {
      return frames[k][d[1]].y;
    });
}

function anim(frames, svg) {
  // Joints
  headJoint = 15;

 svg.selectAll("g.jointsanim")
    .data(frames)
    .selectAll("circle.anim")
    .data(function(d, i) {
      return d;
    })
    .attr("cx", function(d) {
      return d.x;
    })
    .attr("cy", function(d) {
      return d.y;
    })
    .attr("r", function(d, i, k) {
        return .2 + 1.5 * k/traillength;
    })
    .attr("fill",'#cc6666')
    .attr("fill-opacity", function (d,i, k) {
        return k/traillength;
    });


  // Bones

 svg.selectAll("g.boneanim")
    .data(frames)
    .selectAll("line.anim")
    .data(skeleton)
    .attr("stroke", "#cc6666")
    .attr("stroke-opacity",  function (d,i, k) {
        return .1 + 0.3 * k/traillength;
    })
    .attr("stroke-width", function (d,i, k) {
        return 3 * k/traillength;
    })
    .attr("x1", function(d, j, k) {
      return frames[k][d[0]].x;
    })
    .attr("x2", function(d, j, k) {
      return frames[k][d[1]].x;
    })
    .attr("y1", function(d, j, k) {
      return frames[k][d[0]].y;
    })
    .attr("y2", function(d, j, k) {
      return frames[k][d[1]].y;
    });
}

## preview.png

      
          Raw
        
        
              preview.png