ChartDirector 6.1 (Java Edition)

Surface Perspective


          

This example demonstrates the effects of various perspective depth, configured using ThreeDChart.setPerspective.

Source Code Listing

[JSP Version] jspdemo/surfaceperspective.jsp
<%@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 chartIndex)
{
    // The x and y coordinates of the grid
    double[] dataX = {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0};
    double[] dataY = {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0};

    // The values at the grid points. In this example, we will compute the values using the formula
    // z = sin((x - 0.5) * 2 * pi) * sin((y - 0.5) * 2 * pi)
    double[] dataZ = new double[dataX.length * dataY.length];
    for (int yIndex = 0; yIndex < dataY.length; ++yIndex) {
        double y = (dataY[yIndex] - 0.5) * 2 * 3.1416;
        for (int xIndex = 0; xIndex < dataX.length; ++xIndex) {
            double x = (dataX[xIndex] - 0.5) * 2 * 3.1416;
            dataZ[yIndex * dataX.length + xIndex] = Math.sin(x) * Math.sin(y);
        }
    }

    // the perspective level
    int perspective = chartIndex * 12;

    // Create a SurfaceChart object of size 360 x 360 pixels, with white (ffffff) background and
    // grey (888888) border.
    SurfaceChart c = new SurfaceChart(360, 360, 0xffffff, 0x888888);

    // Set the perspective level
    c.setPerspective(perspective);
    c.addTitle("Perspective = " + perspective);

    // Set the center of the plot region at (195, 165), and set width x depth x height to 200 x 200
    // x 150 pixels
    c.setPlotRegion(195, 165, 200, 200, 150);

    // Set the plot region wall thichness to 5 pixels
    c.setWallThickness(5);

    // Set the elevation and rotation angles to 30 and 30 degrees
    c.setViewAngle(30, 30);

    // Set the data to use to plot the chart
    c.setData(dataX, dataY, dataZ);

    // Spline interpolate data to a 40 x 40 grid for a smooth surface
    c.setInterpolation(40, 40);

    // Use smooth gradient coloring.
    c.colorAxis().setColorGradient();

    // Output the chart
    ImageWithHotSpot ret = new ImageWithHotSpot();
    ret.imageURL = c.makeSession(request, "chart" + chartIndex, Chart.JPG);
    return ret;
}
%>
<%
ImageWithHotSpot chart0 = createChart(request, 0);
ImageWithHotSpot chart1 = createChart(request, 1);
ImageWithHotSpot chart2 = createChart(request, 2);
ImageWithHotSpot chart3 = createChart(request, 3);
ImageWithHotSpot chart4 = createChart(request, 4);
ImageWithHotSpot chart5 = createChart(request, 5);
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Surface Perspective
</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)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart4.imageURL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart5.imageURL)%>'>
</body>
</html>

[Java Version] javademo/surfaceperspective.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class surfaceperspective implements DemoModule
{
    //Name of demo program
    public String toString() { return "Surface Perspective"; }

    //Number of charts produced in this demo
    public int getNoOfCharts() { return 6; }

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // The x and y coordinates of the grid
        double[] dataX = {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0};
        double[] dataY = {0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0};

        // The values at the grid points. In this example, we will compute the values using the
        // formula z = sin((x - 0.5) * 2 * pi) * sin((y - 0.5) * 2 * pi)
        double[] dataZ = new double[dataX.length * dataY.length];
        for (int yIndex = 0; yIndex < dataY.length; ++yIndex) {
            double y = (dataY[yIndex] - 0.5) * 2 * 3.1416;
            for (int xIndex = 0; xIndex < dataX.length; ++xIndex) {
                double x = (dataX[xIndex] - 0.5) * 2 * 3.1416;
                dataZ[yIndex * dataX.length + xIndex] = Math.sin(x) * Math.sin(y);
            }
        }

        // the perspective level
        int perspective = chartIndex * 12;

        // Create a SurfaceChart object of size 360 x 360 pixels, with white (ffffff) background and
        // grey (888888) border.
        SurfaceChart c = new SurfaceChart(360, 360, 0xffffff, 0x888888);

        // Set the perspective level
        c.setPerspective(perspective);
        c.addTitle("Perspective = " + perspective);

        // Set the center of the plot region at (195, 165), and set width x depth x height to 200 x
        // 200 x 150 pixels
        c.setPlotRegion(195, 165, 200, 200, 150);

        // Set the plot region wall thichness to 5 pixels
        c.setWallThickness(5);

        // Set the elevation and rotation angles to 30 and 30 degrees
        c.setViewAngle(30, 30);

        // Set the data to use to plot the chart
        c.setData(dataX, dataY, dataZ);

        // Spline interpolate data to a 40 x 40 grid for a smooth surface
        c.setInterpolation(40, 40);

        // Use smooth gradient coloring.
        c.colorAxis().setColorGradient();

        // Output the chart
        viewer.setChart(c);
    }

    //Allow this module to run as standalone program for easy testing
    public static void main(String[] args)
    {
        //Instantiate an instance of this demo module
        DemoModule demo = new surfaceperspective();

        //Create and set up the main window
        JFrame frame = new JFrame(demo.toString());
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);} });
        frame.getContentPane().setBackground(Color.white);
        frame.getContentPane().setLayout(new FlowLayout(FlowLayout.LEFT));
        frame.setSize(800, 450);

        // Create the charts and put them in the content pane
        for (int i = 0; i < demo.getNoOfCharts(); ++i)
        {
            ChartViewer viewer = new ChartViewer();
            demo.createChart(viewer, i);
            frame.getContentPane().add(viewer);
        }

        // Display the window
        frame.setVisible(true);
    }
}