ChartDirector 7.0 (Java Edition)
Surface Shading
Source Code Listing
<%@page import="ChartDirector.*, java.util.*" %>
<%!
// Function to create the demo charts
void createChart(WebChartViewer viewer, int chartIndex)
{
// The x and y coordinates of the grid
double[] dataX = {-10, -8, -6, -4, -2, 0, 2, 4, 6, 8, 10};
double[] dataY = {-10, -8, -6, -4, -2, 0, 2, 4, 6, 8, 10};
// The values at the grid points. In this example, we will compute the values using the formula
// z = x * sin(y) + y * sin(x).
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] = x * Math.sin(y) + y * Math.sin(x);
}
}
// Create a SurfaceChart object of size 380 x 400 pixels, with white (ffffff) background and
// grey (888888) border.
SurfaceChart c = new SurfaceChart(380, 400, 0xffffff, 0x888888);
// Demonstrate various shading methods
if (chartIndex == 0) {
c.addTitle("11 x 11 Data Points\nSmooth Shading");
} else if (chartIndex == 1) {
c.addTitle("11 x 11 Points - Spline Fitted to 50 x 50\nSmooth Shading");
c.setInterpolation(50, 50);
} else if (chartIndex == 2) {
c.addTitle("11 x 11 Data Points\nRectangular Shading");
c.setShadingMode(Chart.RectangularShading);
} else {
c.addTitle("11 x 11 Data Points\nTriangular Shading");
c.setShadingMode(Chart.TriangularShading);
}
// Set the center of the plot region at (175, 200), and set width x depth x height to 200 x 200
// x 160 pixels
c.setPlotRegion(175, 200, 200, 200, 160);
// Set the plot region wall thichness to 5 pixels
c.setWallThickness(5);
// Set the elevation and rotation angles to 45 and 60 degrees
c.setViewAngle(45, 60);
// Set the perspective level to 35
c.setPerspective(35);
// Set the data to use to plot the chart
c.setData(dataX, dataY, dataZ);
// Set contour lines to semi-transparent black (c0000000)
c.setContourColor(0xc0000000);
// Output the chart
viewer.setChart(c, Chart.SVG);
}
%>
<%
// This example includes 4 charts
WebChartViewer[] viewers = new WebChartViewer[4];
for (int i = 0; i < viewers.length; ++i) {
viewers[i] = new WebChartViewer(request, "chart" + i);
createChart(viewers[i], i);
}
%>
<!DOCTYPE html>
<html>
<head>
<title>Surface Shading</title>
<!-- Include ChartDirector Javascript Library to support chart interactions -->
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
<div style="font:bold 18pt verdana;">
Surface Shading
</div>
<hr style="border:solid 1px #000080; background:#000080" />
<div style="font:10pt verdana; margin-bottom:1.5em">
<a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
</div>
<!-- ****** Here are the chart images ****** -->
<%
for (int i = 0; i < viewers.length; ++i) {
out.write(viewers[i].renderHTML(response));
out.write(" ");
}
%>
</body>
</html>