Example 1, using a separate input items for x, y, z, t and 1 output item for f
[Test]
public void AnalyticalFunction()
{
AnalyticalFunctionComponent function = new AnalyticalFunctionComponent();
function.Initialize(null);
IInputItem x = function.InputItems[0];
IInputItem y = function.InputItems[1];
IInputItem z = function.InputItems[2];
IInputItem t = function.InputItems[3];
IOutputItem f = function.OutputItems[0];
Assert.AreEqual(1, x.Values.Count);
Assert.AreEqual(1, y.Values.Count);
Assert.AreEqual(1, z.Values.Count);
Assert.AreEqual(1, t.Values.Count);
Assert.AreEqual(1, f.Values.Count);
x.Values[0] = 1.0;
y.Values[0] = 0.0;
z.Values[0] = 10.0;
t.Values[0] = new System.TimeSpan(20, 10, 0, 0);
function.Update(); // computes f(x,y,z,t) = sin(x + y) + z * t
log.DebugFormat("Computed analytical function value f({0}, {1}, {2}, {3}) = {4}",
x.Values[0], y.Values[0], z.Values[0], t.Values[0],
f.Values[0]);
Assert.AreEqual(17640000.841470987d, (double)f.Values[0], 0.00001);
}
Example 2, using an input items containing element set with 1 point for x, y, z and one time for t which is connected as input of the function and computing values in the output item for f
[Test]
public void AnalyticalFunction2()
{
AnalyticalFunctionComponent2 function = new AnalyticalFunctionComponent2();
function.Initialize(null);
Assert.AreEqual(1, function.InputItems.Count);
Assert.AreEqual(1, function.OutputItems.Count);
OutputItem source = new OutputItem();
FillItem(source, 0.1, 0.1, 0.5, DateTime.Now);
source.AddConsumer(function.InputItems[0]);
Assert.AreEqual(default(double), function.OutputItems[0].Values[0]);
function.Update();
Assert.AreNotEqual(default(double), function.OutputItems[0].Values[0]);
}
Example 3, using input item which has element set with 1 point for x, y, z and one time for t. Then it is connected to the 1st output item of the function. When values in the function are computed - they are passed to that input item.
/// <summary>
/// This is the way (conceptually) how it worked in v1.
/// </summary>
[Test]
public void AnalyticalFunction3()
{
AnalyticalFunctionComponent3 function = new AnalyticalFunctionComponent3();
function.Initialize(null);
Assert.AreEqual(0, function.InputItems.Count);
Assert.AreEqual(1, function.OutputItems.Count);
// create an element set
InputItem requiredInput = new InputItem();
FillItem(requiredInput, 0.1, 0.1, 0.5, DateTime.Now);
function.OutputItems[0].Consumers.Add(requiredInput);
Assert.AreEqual(default(double), function.OutputItems[0].Values[0]);
// compute
function.Update();
Assert.AreNotEqual(default(double), requiredInput.Values[0], "value in the input item must be changed");
}
Helper method to fill element set and time into exchange item
// TODO: we have to make construction of such thing simpler
private void FillItem(ExchangeItem item, double x, double y, double z, DateTime t)
{
ElementSet elementSet = new ElementSet("1 point element set");
elementSet.ElementType = ElementType.XYZPoint;
Element point = new Element(string.Empty);
point.AddVertex(new Coordinate(x, y, z));
elementSet.AddElement(point);
// set required elements and times
item.ElementSet = elementSet;
item.Temporal = new Temporal();
item.Temporal.Times.Add(new TimeStamp(CalendarConverter.Gregorian2ModifiedJulian(t)));
}
}
}
