ComplexStep

block ComplexStep "Generate step signal of type Complex"
    parameter Complex height = Complex(1) "Height of step";

    extends ComplexBlocks.Interfaces.ComplexSignalSource;
equation
    y = offset + (if time < startTime then Complex(0) else height);

    annotation (
        defaultComponentName = "complexStep",
        Icon(
            coordinateSystem(
                preserveAspectRatio = true,
                extent = {
                    {-100, -100}, 
                    {100, 100}}),
            graphics = {
                Line(
                    points = {
                        {-80, 68}, 
                        {-80, -80}},
                    color = {192, 192, 192}), 
                Polygon(
                    points = {
                        {-80, 90}, 
                        {-88, 68}, 
                        {-72, 68}, 
                        {-80, 90}},
                    lineColor = {192, 192, 192},
                    fillColor = {192, 192, 192},
                    fillPattern = FillPattern.Solid), 
                Line(
                    points = {
                        {-90, -70}, 
                        {82, -70}},
                    color = {192, 192, 192}), 
                Polygon(
                    points = {
                        {90, -70}, 
                        {68, -62}, 
                        {68, -78}, 
                        {90, -70}},
                    lineColor = {192, 192, 192},
                    fillColor = {192, 192, 192},
                    fillPattern = FillPattern.Solid), 
                Line(points = {
                    {-80, -70}, 
                    {0, -70}, 
                    {0, 50}, 
                    {80, 50}}), 
                Text(
                    extent = {
                        {-150, -150}, 
                        {150, -110}},
                    textString = "startTime=%startTime")}),
        Diagram(
            coordinateSystem(
                preserveAspectRatio = true,
                extent = {
                    {-100, -100}, 
                    {100, 100}}),
            graphics = {
                Polygon(
                    points = {
                        {-80, 90}, 
                        {-86, 68}, 
                        {-74, 68}, 
                        {-80, 90}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Line(
                    points = {
                        {-80, 68}, 
                        {-80, -80}},
                    color = {95, 95, 95}), 
                Line(
                    points = {
                        {-80, -18}, 
                        {0, -18}, 
                        {0, 50}, 
                        {80, 50}},
                    color = {0, 0, 255},
                    thickness = 0.5), 
                Line(
                    points = {
                        {-90, -70}, 
                        {82, -70}},
                    color = {95, 95, 95}), 
                Polygon(
                    points = {
                        {90, -70}, 
                        {68, -64}, 
                        {68, -76}, 
                        {90, -70}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Text(
                    extent = {
                        {70, -80}, 
                        {94, -100}},
                    textString = "time"), 
                Text(
                    extent = {
                        {-21, -72}, 
                        {25, -90}},
                    textString = "startTime"), 
                Line(
                    points = {
                        {0, -17}, 
                        {0, -71}},
                    color = {95, 95, 95}), 
                Text(
                    extent = {
                        {-68, -36}, 
                        {-22, -54}},
                    textString = "offset"), 
                Line(
                    points = {
                        {-13, 50}, 
                        {-13, -17}},
                    color = {95, 95, 95}), 
                Polygon(
                    points = {
                        {2, 50}, 
                        {-19, 50}, 
                        {2, 50}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Polygon(
                    points = {
                        {-13, -17}, 
                        {-16, -4}, 
                        {-10, -4}, 
                        {-13, -17}, 
                        {-13, -17}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Polygon(
                    points = {
                        {-13, 50}, 
                        {-16, 37}, 
                        {-9, 37}, 
                        {-13, 50}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Text(
                    extent = {
                        {-68, 26}, 
                        {-22, 8}},
                    textString = "height"), 
                Polygon(
                    points = {
                        {-13, -69}, 
                        {-16, -56}, 
                        {-10, -56}, 
                        {-13, -69}, 
                        {-13, -69}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Line(
                    points = {
                        {-13, -18}, 
                        {-13, -70}},
                    color = {95, 95, 95}), 
                Polygon(
                    points = {
                        {-13, -18}, 
                        {-16, -31}, 
                        {-9, -31}, 
                        {-13, -18}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Text(
                    extent = {
                        {-72, 100}, 
                        {-31, 80}},
                    textString = "y")}),
        Documentation(info = "<html>\n<p>\nThe Complex output y is a step signal (of real and imaginary part):\n</p>\n\n<p>\n<img src=\"modelica://Modelica/Resources/Images/Blocks/Sources/Step.png\"\n     alt=\"Step.png\">\n</p>\n\n</html>"));
end ComplexStep;