<%@page import="ChartDirector.*" %>
<%@page import="javax.servlet.http.*" %>
<%!
// A simple structure to represent a chart image with an image map
private static class ImageWithHotSpot
{
String imageURL;
String imageMap;
}
// Function to create the demo charts
ImageWithHotSpot createChart(HttpServletRequest request, int index)
{
// The x and y coordinates of the grid
double[] dataX = {-4, -3, -2, -1, 0, 1, 2, 3, 4};
double[] dataY = {-4, -3, -2, -1, 0, 1, 2, 3, 4};
// The values at the grid points. In this example, we will compute the values
// using the formula z = Sin(x * pi / 3) * Sin(y * pi / 3).
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 * 3.1416 / 3) *
Math.sin(y * 3.1416 / 3);
}
}
// Create a XYChart object of size 360 x 360 pixels
XYChart c = new XYChart(360, 360);
// Set the plotarea at (30, 25) and of size 300 x 300 pixels. Use
// semi-transparent black (c0000000) for both horizontal and vertical grid lines
c.setPlotArea(30, 25, 300, 300, -1, -1, -1, 0xc0000000, -1);
// Add a contour layer using the given data
ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ);
// Set the x-axis and y-axis scale
c.xAxis().setLinearScale(-4, 4, 1);
c.yAxis().setLinearScale(-4, 4, 1);
if (index == 0) {
// Discrete coloring, spline surface interpolation
c.addTitle("Spline Surface - Discrete Coloring", "Arial Bold Italic", 12);
} else if (index == 1) {
// Discrete coloring, linear surface interpolation
c.addTitle("Linear Surface - Discrete Coloring", "Arial Bold Italic", 12);
layer.setSmoothInterpolation(false);
} else if (index == 2) {
// Smooth coloring, spline surface interpolation
c.addTitle("Spline Surface - Continuous Coloring", "Arial Bold Italic", 12);
layer.setContourColor(Chart.Transparent);
layer.colorAxis().setColorGradient(true);
} else {
// Discrete coloring, linear surface interpolation
c.addTitle("Linear Surface - Continuous Coloring", "Arial Bold Italic", 12);
layer.setSmoothInterpolation(false);
layer.setContourColor(Chart.Transparent);
layer.colorAxis().setColorGradient(true);
}
// Output the chart
ImageWithHotSpot ret = new ImageWithHotSpot();
ret.imageURL = c.makeSession(request, "chart" + index, Chart.JPG);
return ret;
}
%>
<%
ImageWithHotSpot chart0 = createChart(request, 0);
ImageWithHotSpot chart1 = createChart(request, 1);
ImageWithHotSpot chart2 = createChart(request, 2);
ImageWithHotSpot chart3 = createChart(request, 3);
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
Contour Interpolation
</div>
<hr color="#000080">
<div style="font-size:10pt; font-family:verdana; margin-bottom:1.5em">
<a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
</div>
<img src='<%=response.encodeURL("getchart.jsp?"+chart0.imageURL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1.imageURL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart2.imageURL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart3.imageURL)%>'>
</body>
</html> |