Surface Lighting

[JSP Version] jspdemo/surfacelighting.jsp
<%@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 lighting parameters
    if (chartIndex == 0) {
        c.addTitle(
            "Default Lighting<*br*><*size=10*>Ambient = 0.5, Diffuse = 0.5, Specular = 1, " +
            "Shininess = 8");
    } else if (chartIndex == 1) {
        c.addTitle(
            "Matte (Non-Glossy) Lighting<*br*><*size=10*>Ambient = 0.5, Diffuse = 0.5, Specular " +
            "= 0, Shininess = 0");
        c.setLighting(0.5, 0.5, 0, 0);
    } else if (chartIndex == 2) {
        c.addTitle(
            "Flat Lighting<*br*><*size=10*>Ambient = 1, Diffuse = 0, Specular = 0, Shininess = 0");
        c.setLighting(1, 0, 0, 0);
    } else {
        c.addTitle(
            "Strong Glossy Lighting<*br*><*size=10*>Ambient = 0.5, Diffuse = 0.5, Specular = 4, " +
            "Shininess = 32");
        c.setLighting(0.5, 0.5, 4, 32);
    }

    // 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);

    // Spline interpolate data to a 50 x 50 grid for a smooth surface
    c.setInterpolation(50, 50);

    // 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 Lighting</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 Lighting
    </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>