[Time Controller] Use start time in example

WTD-1515

example/generator/src/SinewaveTelemetrySeries.js

@@ -0,0 +1,64 @@
+/*****************************************************************************
+ * Open MCT Web, Copyright (c) 2014-2015, United States Government
+ * as represented by the Administrator of the National Aeronautics and Space
+ * Administration. All rights reserved.
+ *
+ * Open MCT Web is licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * Open MCT Web includes source code licensed under additional open source
+ * licenses. See the Open Source Licenses file (LICENSES.md) included with
+ * this source code distribution or the Licensing information page available
+ * at runtime from the About dialog for additional information.
+ *****************************************************************************/
+/*global define,Promise*/
+
+/**
+ * Module defining SinewaveTelemetry. Created by vwoeltje on 11/12/14.
+ */
+define(
+    [],
+    function () {
+        "use strict";
+
+        var firstObservedTime = Date.now();
+
+        /**
+         *
+         * @constructor
+         */
+        function SinewaveTelemetrySeries(request) {
+            var firstTime = (request || {}).start || firstObservedTime,
+                latestObservedTime = Date.now(),
+                count = Math.floor((latestObservedTime - firstTime) / 1000),
+                period = request.period || 30,
+                generatorData = {};
+
+            generatorData.getPointCount = function () {
+                return count;
+            };
+
+            generatorData.getDomainValue = function (i, domain) {
+                return i * 1000 +
+                        (domain !== 'delta' ? firstTime : 0);
+            };
+
+            generatorData.getRangeValue = function (i, range) {
+                range = range || "sin";
+                return Math[range](i * Math.PI * 2 / period);
+            };
+
+            return generatorData;
+        }
+
+        return SinewaveTelemetrySeries;
+    }
+);