ChartDirector 7.0 (ASP/COM/VB Edition)

3D Shadow Mode


      

This example demonstrates an alternative 3D drawing method that uses shadows.

The standard way to draw a pie chart in 3D is to view the chart from an inclined angle. Using this method, the surface of a 3D pie will become an ellipse.

ChartDirector supports an alternative way to draw a pie chart in 3D - to draw the 3D portion like a shadow. The 3D pie will remain perfectly circular, and the sector areas will correctly reflect its percentages.

The 3D drawing method is configured using PieChart.set3D.

Source Code Listing

[Web Version (in ASP)] aspdemo\shadowpie.asp
<%@ language="vbscript" %> <% Set cd = CreateObject("ChartDirector.API") ' This script can draw different charts depending on the chartIndex Sub createChart(viewer, chartIndex) ' the tilt angle of the pie angle = chartIndex * 90 + 45 ' The data for the pie chart data = Array(25, 18, 15, 12, 8, 30, 35) ' The labels for the pie chart labels = Array("Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities", "Production") ' Create a PieChart object of size 110 x 110 pixels Set c = cd.PieChart(110, 110) ' Set the center of the pie at (50, 55) and the radius to 36 pixels Call c.setPieSize(55, 55, 36) ' Set the depth, tilt angle and 3D mode of the 3D pie (-1 means auto depth, "true" means the 3D ' effect is in shadow mode) Call c.set3D(-1, angle, True) ' Add a title showing the shadow angle Call c.addTitle("Shadow @ " & angle & " deg", "Arial", 8) ' Set the pie data Call c.setData(data, labels) ' Disable the sector labels by setting the color to Transparent Call c.setLabelStyle("", 8, cd.Transparent) ' Output the chart Call viewer.setChart(c, cd.SVG) ' Include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("", "", "title='{label}: US${value}K ({percent}%)'") End Sub ' This example includes 4 charts Dim viewers(3) For i = 0 To Ubound(viewers) Set viewers(i) = cd.WebChartViewer(Request, "chart" & i) Call createChart(viewers(i), i) Next %> <!DOCTYPE html> <html> <head> <title>3D Shadow Mode</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;"> 3D Shadow Mode </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.asp?file=<%= Request("SCRIPT_NAME") %>">View Chart Source Code</a> </div> <!-- ****** Here are the chart images ****** --> <% For i = 0 To Ubound(viewers) Call Response.Write(viewers(i).renderHTML()) Call Response.Write(" ") Next %> </body> </html>

[Windows Version (in Visual Basic)] vbdemo\shadowpie.cls
Public Sub createChart(viewer As Object, chartIndex As Integer) Dim cd As New ChartDirector.API ' the tilt angle of the pie Dim angle As Long angle = chartIndex * 90 + 45 ' The data for the pie chart Dim data() data = Array(25, 18, 15, 12, 8, 30, 35) ' The labels for the pie chart Dim labels() labels = Array("Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities", "Production") ' Create a PieChart object of size 110 x 110 pixels Dim c As PieChart Set c = cd.PieChart(110, 110) ' Set the center of the pie at (50, 55) and the radius to 36 pixels Call c.setPieSize(55, 55, 36) ' Set the depth, tilt angle and 3D mode of the 3D pie (-1 means auto depth, "true" means the 3D ' effect is in shadow mode) Call c.set3D(-1, angle, True) ' Add a title showing the shadow angle Call c.addTitle("Shadow @ " & angle & " deg", "arial.ttf", 8) ' Set the pie data Call c.setData(data, labels) ' Disable the sector labels by setting the color to Transparent Call c.setLabelStyle("", 8, cd.Transparent) ' Output the chart Set viewer.Picture = c.makePicture() 'include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("clickable", "", _ "title='{label}: US${value}K ({percent}%)'") End Sub