ChartDirector 6.2 (.NET Edition)

Continuous Contour Coloring

This example demonstrates continuous coloring of the ContourLayer.

By default, a contour layer will be discretely colored, which means the color will change in discrete steps according to the z level. In continuous coloring, the color will change continuously according to the z level. Continuous coloring can be enabled using ColorAxis.setColorGradient or ColorAxis.setColorScale.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\smoothcontour.cs
 ```using System; using ChartDirector; namespace CSharpChartExplorer { public class smoothcontour : DemoModule { //Name of demo module public string getName() { return "Continuous Contour Coloring"; } //Number of charts produced in this demo module public int getNoOfCharts() { return 1; } //Main code for creating chart. //Note: the argument chartIndex is unused because this demo only has 1 chart. public void createChart(WinChartViewer viewer, int chartIndex) { // The x and y coordinates of the grid double[] dataX = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // The values at the grid points. In this example, we will compute the values using the // formula z = Sin(x / 2) * Sin(y / 2). double[] dataZ = new double[dataX.Length * dataY.Length]; for(int yIndex = 0; yIndex < dataY.Length; ++yIndex) { double y = dataY[yIndex]; for(int xIndex = 0; xIndex < dataX.Length; ++xIndex) { double x = dataX[xIndex]; dataZ[yIndex * dataX.Length + xIndex] = Math.Sin(x / 2.0) * Math.Sin(y / 2.0); } } // Create a XYChart object of size 600 x 500 pixels XYChart c = new XYChart(600, 500); // Add a title to the chart using 18 points Times New Roman Bold Italic font c.addTitle("Nano Lattice Twister Field Intensity ", "Times New Roman Bold Italic", 18); // Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black // (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(unchecked((int)0x80000000), Chart.DotLine), -1); // Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("Lattice X Direction (nm)", "Arial Bold Italic", 12); c.yAxis().setTitle("Lattice Y Direction (nm)", "Arial Bold Italic", 12); // Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold"); c.yAxis().setLabelStyle("Arial Bold"); // When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40); c.xAxis().setTickDensity(40); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Set the contour color to transparent layer.setContourColor(Chart.Transparent); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Add a color axis (the legend) in which the left center point is anchored at (495, // 240). Set the length to 370 pixels and the labels on the right side. ColorAxis cAxis = layer.setColorAxis(495, 240, Chart.Left, 370, Chart.Right); // Add a bounding box to the color axis using light grey (eeeeee) as the background and // dark grey (444444) as the border. cAxis.setBoundingBox(0xeeeeee, 0x444444); // Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Twist Pressure (Twist-Volt)", "Arial Bold Italic", 12); // Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold"); // Use smooth gradient coloring cAxis.setColorGradient(true); // Output the chart viewer.Chart = c; } } }```

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\smoothcontour.vb
 ```Imports System Imports Microsoft.VisualBasic Imports ChartDirector Public Class smoothcontour Implements DemoModule 'Name of demo module Public Function getName() As String Implements DemoModule.getName Return "Continuous Contour Coloring" End Function 'Number of charts produced in this demo module Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts Return 1 End Function 'Main code for creating chart. 'Note: the argument chartIndex is unused because this demo only has 1 chart. Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _ Implements DemoModule.createChart ' The x and y coordinates of the grid Dim dataX() As Double = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, _ 8, 9, 10} Dim dataY() As Double = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, _ 8, 9, 10} ' The values at the grid points. In this example, we will compute the values using the ' formula z = Sin(x / 2) * Sin(y / 2). Dim dataZ((UBound(dataX) + 1) * (UBound(dataY) + 1) - 1) As Double For yIndex As Integer = 0 To UBound(dataY) Dim y As Double = dataY(yIndex) For xIndex As Integer = 0 To UBound(dataX) Dim x As Double = dataX(xIndex) dataZ(yIndex * (UBound(dataX) + 1) + xIndex) = Math.Sin(x / 2.0) * Math.Sin(y / _ 2.0) Next Next ' Create a XYChart object of size 600 x 500 pixels Dim c As XYChart = New XYChart(600, 500) ' Add a title to the chart using 18 points Times New Roman Bold Italic font c.addTitle("Nano Lattice Twister Field Intensity ", "Times New Roman Bold Italic", _ 18) ' Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black ' (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(&H80000000, Chart.DotLine), -1) ' Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("Lattice X Direction (nm)", "Arial Bold Italic", 12) c.yAxis().setTitle("Lattice Y Direction (nm)", "Arial Bold Italic", 12) ' Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold") c.yAxis().setLabelStyle("Arial Bold") ' When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40) c.xAxis().setTickDensity(40) ' Add a contour layer using the given data Dim layer As ContourLayer = c.addContourLayer(dataX, dataY, dataZ) ' Set the contour color to transparent layer.setContourColor(Chart.Transparent) ' Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer) ' Add a color axis (the legend) in which the left center point is anchored at (495, 240). ' Set the length to 370 pixels and the labels on the right side. Dim cAxis As ColorAxis = layer.setColorAxis(495, 240, Chart.Left, 370, Chart.Right) ' Add a bounding box to the color axis using light grey (eeeeee) as the background and dark ' grey (444444) as the border. cAxis.setBoundingBox(&Heeeeee, &H444444) ' Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Twist Pressure (Twist-Volt)", "Arial Bold Italic", 12) ' Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold") ' Use smooth gradient coloring cAxis.setColorGradient(True) ' Output the chart viewer.Chart = c End Sub End Class```

[WPF - C#] NetWPFCharts\smoothcontour.cs
 ```using System; using ChartDirector; namespace CSharpWPFDemo { public class smoothcontour : DemoModule { //Name of demo module public string getName() { return "Continuous Contour Coloring"; } //Number of charts produced in this demo module public int getNoOfCharts() { return 1; } //Main code for creating chart. //Note: the argument chartIndex is unused because this demo only has 1 chart. public void createChart(WPFChartViewer viewer, int chartIndex) { // The x and y coordinates of the grid double[] dataX = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // The values at the grid points. In this example, we will compute the values using the // formula z = Sin(x / 2) * Sin(y / 2). double[] dataZ = new double[dataX.Length * dataY.Length]; for(int yIndex = 0; yIndex < dataY.Length; ++yIndex) { double y = dataY[yIndex]; for(int xIndex = 0; xIndex < dataX.Length; ++xIndex) { double x = dataX[xIndex]; dataZ[yIndex * dataX.Length + xIndex] = Math.Sin(x / 2.0) * Math.Sin(y / 2.0); } } // Create a XYChart object of size 600 x 500 pixels XYChart c = new XYChart(600, 500); // Add a title to the chart using 18 points Times New Roman Bold Italic font c.addTitle("Nano Lattice Twister Field Intensity ", "Times New Roman Bold Italic", 18); // Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black // (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(unchecked((int)0x80000000), Chart.DotLine), -1); // Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("Lattice X Direction (nm)", "Arial Bold Italic", 12); c.yAxis().setTitle("Lattice Y Direction (nm)", "Arial Bold Italic", 12); // Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold"); c.yAxis().setLabelStyle("Arial Bold"); // When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40); c.xAxis().setTickDensity(40); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Set the contour color to transparent layer.setContourColor(Chart.Transparent); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Add a color axis (the legend) in which the left center point is anchored at (495, // 240). Set the length to 370 pixels and the labels on the right side. ColorAxis cAxis = layer.setColorAxis(495, 240, Chart.Left, 370, Chart.Right); // Add a bounding box to the color axis using light grey (eeeeee) as the background and // dark grey (444444) as the border. cAxis.setBoundingBox(0xeeeeee, 0x444444); // Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Twist Pressure (Twist-Volt)", "Arial Bold Italic", 12); // Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold"); // Use smooth gradient coloring cAxis.setColorGradient(true); // Output the chart viewer.Chart = c; } } }```

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\smoothcontour.aspx
 ```<%@ Page Language="C#" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> ```

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\smoothcontour.aspx
 ```<%@ Page Language="VB" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> ```
 ```using System; using System.Web.Mvc; using ChartDirector; namespace NetMvcCharts.Controllers { public class SmoothcontourController : Controller { // // Default Action // public ActionResult Index() { ViewBag.Title = "Continuous Contour Coloring"; createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1")); return View("~/Views/Shared/ChartView.cshtml"); } // // Create chart // private void createChart(RazorChartViewer viewer) { // The x and y coordinates of the grid double[] dataX = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // The values at the grid points. In this example, we will compute the values using the // formula z = Sin(x / 2) * Sin(y / 2). double[] dataZ = new double[dataX.Length * dataY.Length]; for(int yIndex = 0; yIndex < dataY.Length; ++yIndex) { double y = dataY[yIndex]; for(int xIndex = 0; xIndex < dataX.Length; ++xIndex) { double x = dataX[xIndex]; dataZ[yIndex * dataX.Length + xIndex] = Math.Sin(x / 2.0) * Math.Sin(y / 2.0); } } // Create a XYChart object of size 600 x 500 pixels XYChart c = new XYChart(600, 500); // Add a title to the chart using 18 points Times New Roman Bold Italic font c.addTitle("Nano Lattice Twister Field Intensity ", "Times New Roman Bold Italic", 18) ; // Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black // (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(unchecked((int)0x80000000), Chart.DotLine), -1); // Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("Lattice X Direction (nm)", "Arial Bold Italic", 12); c.yAxis().setTitle("Lattice Y Direction (nm)", "Arial Bold Italic", 12); // Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold"); c.yAxis().setLabelStyle("Arial Bold"); // When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40); c.xAxis().setTickDensity(40); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Set the contour color to transparent layer.setContourColor(Chart.Transparent); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Add a color axis (the legend) in which the left center point is anchored at (495, 240). // Set the length to 370 pixels and the labels on the right side. ColorAxis cAxis = layer.setColorAxis(495, 240, Chart.Left, 370, Chart.Right); // Add a bounding box to the color axis using light grey (eeeeee) as the background and dark // grey (444444) as the border. cAxis.setBoundingBox(0xeeeeee, 0x444444); // Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Twist Pressure (Twist-Volt)", "Arial Bold Italic", 12); // Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold"); // Use smooth gradient coloring cAxis.setColorGradient(true); // Output the chart viewer.Image = c.makeWebImage(Chart.JPG); } } }```
 ```@{ Layout = null; } @ViewBag.Title