Point, linestring, and linearring coordinates as Float32Array

src/ol/geom/linestring.js

@@ -1,5 +1,8 @@
 goog.provide('ol.geom.LineString');
 
+goog.require('goog.asserts');
+goog.require('goog.vec.Float32Array');
+goog.require('ol.geom.CoordinateArray');
 goog.require('ol.geom.Geometry');
 
 
@@ -7,13 +10,29 @@ goog.require('ol.geom.Geometry');
 /**
  * @constructor
  * @implements {ol.geom.Geometry}
- * @param {Array} coordinates Coordinates array.
+ * @param {ol.geom.CoordinateArray} coordinates Coordinates array (e.g.
+ *    [[x0, y0], [x1, y1]]).
  */
 ol.geom.LineString = function(coordinates) {
 
+  // assume the same dimension for all coordinates
+  var dimension = coordinates[0].length,
+      count = coordinates.length,
+      length = count * dimension;
+
   /**
-   * @type {Array}
+   * @type {Float32Array}
    */
-  this.coordinates = coordinates;
+  this.coordinates = new Float32Array(length);
+  for (var i = 0; i < count; ++i) {
+    goog.asserts.assert(coordinates[i].length === dimension);
+    this.coordinates.set(coordinates[i], i * dimension);
+  }
+
+  /**
+   * @type {number}
+   */
+  this.dimension = dimension;
+  goog.asserts.assert(this.dimension >= 2);
 
 };