Optional vtkjs

CHANGELOG.md

@@ -4,12 +4,14 @@
 
 ### Features
 - Feature selection API is now enabled automatically if any event handlers are bounds to the feature (#921)
+- Added a VTK.js renderer which supports a point feature (#893)
 
 ### Improvements
 - Coordinate transforms on flat arrays are now faster (#939)
 - `convertColor` is memoized to speed up repeated calls (#936)
 - All features have a `featureType` property (#931)
 - When changing geometry sizes, buffers are reallocated less (#941)
+- Initial rendering webGL features is somewhat faster (#943)
 
 ### Changes
 - Removed the dependency on the vgl module for the `object` and `timestamp` classes (#918)

examples/vtkjs/example.json

@@ -0,0 +1,8 @@
+{
+  "title": "Use VTK.js along with GeoJS",
+  "exampleJs": ["main.js"],
+  "about": {
+    "text": "Show national capitals as points using the vtkjs renderer."
+  },
+  "disabled": true
+}

examples/vtkjs/main.js

@@ -0,0 +1,23 @@
+// Fetch the dataset from the server
+$.ajax({url: '../reprojection/capitals.json'}).done(function (capitals) {
+  // Create a map
+  var map = geo.map({node: '#map'});
+  // Add the map tile layer
+  map.createLayer('osm');
+  // Create a vtk point feature layer
+  var vtkLayer = map.createLayer('feature', {renderer: 'vtkjs'});
+  vtkLayer.createFeature('point', {
+    selectionAPI: true,
+    style: {
+      radius: 5,
+      fillColor: 'red',
+      fillOpacity: 1
+    }
+  })
+  // Bind the dataset to the vtk layer
+  .data(capitals)
+  .position(function (d) {
+    return {x: d.longitude, y: d.latitude};  // position accessor
+  })
+  .draw();
+});