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VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "surface"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit
'Number of charts produced in this demo module
Public Function getNoOfCharts() As Integer
    getNoOfCharts = 1
End Function

'Main code for creating chart.
'Note: the argument img is unused because this demo only has 1 chart
Public Sub createChart(viewer As Object, img As String)

    Dim cd As New ChartDirector.API

    ' The x and y coordinates of the grid
    Dim dataX()
    dataX = Array(-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, _
        8, 9, 10)
    Dim dataY()
    dataY = Array(-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, _
        8, 9, 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).
    ReDim dataZ((UBound(dataX) + 1) * (UBound(dataY) + 1) - 1)
    Dim yIndex As Long
    For yIndex = 0 To UBound(dataY)
        Dim y As Double
        y = dataY(yIndex)
        Dim xIndex As Long
        For xIndex = 0 To UBound(dataX)
            Dim x As Double
            x = dataX(xIndex)
            dataZ(yIndex * (UBound(dataX) + 1) + xIndex) = x * Sin(y) + y * Sin(x)
        Next
    Next

    ' Create a SurfaceChart object of size 720 x 600 pixels
    Dim c As SurfaceChart
    Set c = cd.SurfaceChart(720, 600)

    ' Add a title to the chart using 20 points Times New Roman Italic font
    Call c.addTitle("Surface Energy Density   ", "timesi.ttf", 20)

    ' Set the center of the plot region at (350, 280), and set width x depth x height
    ' to 360 x 360 x 270 pixels
    Call c.setPlotRegion(350, 280, 360, 360, 270)

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

    ' Spline interpolate data to a 80 x 80 grid for a smooth surface
    Call c.setInterpolation(80, 80)

    ' Add a color axis (the legend) in which the left center is anchored at (645,
    ' 270). Set the length to 200 pixels and the labels on the right side.
    Call c.setColorAxis(645, 270, cd.Left, 200, cd.Right)

    ' Set the x, y and z axis titles using 10 points Arial Bold font
    Call c.xAxis().setTitle("X (nm)", "arialbd.ttf", 10)
    Call c.yAxis().setTitle("Y (nm)", "arialbd.ttf", 10)
    Call c.zAxis().setTitle("Energy Density (J/m<*font,super*>2<*/font*>)", _
        "arialbd.ttf", 10)

    ' Output the chart
    Set viewer.Picture = c.makePicture()

End Sub