Adding layer for generating dynamic point grids. r=bartvde (closes #3344)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@12099 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

examples/point-grid.js

@@ -0,0 +1,33 @@
+var points = new OpenLayers.Layer.PointGrid({
+    isBaseLayer: true, dx: 15, dy: 15
+});
+
+var map = new OpenLayers.Map({
+    div: "map",
+    layers: [points],
+    center: new OpenLayers.LonLat(0, 0),
+    zoom: 2
+});
+
+var rotation = document.getElementById("rotation");
+rotation.value = String(points.rotation);
+rotation.onchange = function() {
+    points.setRotation(Number(rotation.value));
+}
+
+var dx = document.getElementById("dx");
+var dy = document.getElementById("dy");
+dx.value = String(points.dx);
+dy.value = String(points.dy);
+dx.onchange = function() {
+    points.setSpacing(Number(dx.value), Number(dy.value));
+}
+dy.onchange = function() {
+    points.setSpacing(Number(dx.value), Number(dy.value));
+}
+
+var max = document.getElementById("max");
+max.value = String(points.maxFeatures);
+max.onchange = function() {
+    points.setMaxFeatures(Number(max.value));
+}