Question

我正在尝试在使用切片的地图上实现缩放转换。我想放大一个位置，然后在另外两个位置之间来回移动。

这是我工作的例子：http://bl.ocks.org/mbostock/6242308 这就是我想要的，只是我希望使用地图图块而不是topojson或geojson文件。

现在地图正在调用跳转函数中的最终位置，但位置之间的转换不起作用。任何有关正在发生的事情的想法都会受到极大的欢迎 - 在控制台中没有任何显示，我有点卡住了。非常感谢。

我的代码如下，并且也在此plunker。

<!DOCTYPE html>
    <meta charset="utf-8">
    <style>

    body {
      margin: 0;
    }

    #container {
      position: relative;
      overflow: hidden;
    }

    #map{
        width:100%;
        height:100%;
    }

    .layer {
      position: absolute;
    }

    .tile {
      pointer-events: none;
      position: absolute;
      width: 256px;
      height: 256px;
    }

    </style>
    <body>
    <script src="http://d3js.org/d3.v3.min.js"></script>
    <script src="http://d3js.org/d3.geo.tile.v0.min.js"></script>
    <div id="canvas">
        <div id="container">
            <g id="map">
                <div class="layer"></div>
            </div>
        </div>
    </div>
    <script>

    var width = Math.max(960, window.innerWidth),
        height = Math.max(500, window.innerHeight),
        prefix = prefixMatch(["webkit", "ms", "Moz", "O"]);

    var tile = d3.geo.tile()
        .size([width, height]);

    var sf = [-122.417, 37.775],
            belowsf = [-122.510962, 37.580284],
        ny = [-74.0064, 40.7142],
            brooklyn = [-73.975536, 40.691674];

    var projection = d3.geo.mercator()
            .scale(200000)
            .translate([-width / 2, -height / 2]); // just temporary

    var zoom = d3.behavior.zoom();

    var canvas = d3.select("#canvas")
            .style("width", width + "px")
            .style("height", height + "px");

    var container = d3.select("#container")
        .style("width", width + "px")
        .style("height", height + "px");

    canvas

                    .call(zoomTo(ny,200300).event)
                        .transition()
                        .duration(20000)
                        .each(jump);

    var map = d3.select("#map");

    var layer = d3.select(".layer");

            function zoomTo(location, newscale) {
              return zoom
                    .scale((newscale) * 2 * Math.PI)
                    .translate(projection(location).map(function(x) { return -x; }));
            }

            function jump() {
              var t = d3.select(this);
              (function repeat() {
                t = t.transition()
                    .call(zoomTo(sf, 200000).event)
                  .transition()
                    .call(zoomTo(belowsf, 200000).event)
                    .each("end", repeat);
              })();
            }

    zoomed();

    function zoomed() {
      var tiles = tile
          .scale(zoom.scale())
          .translate(zoom.translate())
          ();

      projection
          .scale(zoom.scale() / 2 / Math.PI)
          .translate(zoom.translate());

      var image = layer
          .style(prefix + "transform", matrix3d(tiles.scale, tiles.translate))
        .selectAll(".tile")
          .data(tiles, function(d) { return d; });

      image.exit()
          .remove();

      image.enter().append("img")
          .attr("class", "tile")
          .attr("src", function(d) { return "http://" + ["a", "b", "c"][Math.random() * 3 | 0] + ".basemaps.cartocdn.com/light_all/" + d[2] + "/" + d[0] + "/" + d[1] + ".png"; })
          .style("left", function(d) { return (d[0] << 8) + "px"; })
          .style("top", function(d) { return (d[1] << 8) + "px"; });
    }


    function matrix3d(scale, translate) {
      var k = scale / 256, r = scale % 1 ? Number : Math.round;
      return "matrix3d(" + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] * scale), r(translate[1] * scale), 0, 1 ] + ")";
    }

    function prefixMatch(p) {
      var i = -1, n = p.length, s = document.body.style;
      while (++i < n) if (p[i] + "Transform" in s) return "-" + p[i].toLowerCase() + "-";
      return "";
    }

    function formatLocation(p, k) {
      var format = d3.format("." + Math.floor(Math.log(k) / 2 - 2) + "f");
      return (p[1] < 0 ? format(-p[1]) + "°S" : format(p[1]) + "°N") + " "
           + (p[0] < 0 ? format(-p[0]) + "°W" : format(p[0]) + "°E");
    }

    </script>
    </body>
    </html>

d3.js使用地图图块

0 个答案: