Steema Central

Posted: **Tue Mar 15, 2016 11:23 am**

Hi,

I am trying to achieve what is shown in the attachment (3D Chart.png).
Following are the features of the attached chart I want:
1. 3D
2. Individual vertical lines
3. Lines have color-range applied (from the legend)

I tried and found that (My Chart.png):
1. 3D - It is achievable
2. Individual vertical lines - There is no such support in the chart. There is "Point 3D", but the lines are connected. I want individual vertical lines.
3. Lines have color-range applied (from the legend) - When any type from "Point 3D" is selected, the lines do not show color-range from the legend. The lines are either a one solid color or a pre-defined gradient.

Can you please help me in this?
Looking forward to hear from you.

Thanks a lot!

Posted: **Wed Mar 16, 2016 4:29 pm**

Hello,

I'm afraid there isn't a series designed to draw such a chart.
However, you could try using one of the current series (ie a TBar3DSeries or a TLineSeries) and use it to get the desired result.

This is the best I could get for the moment with a TBar3DSeries:

: testVerticalLines.png (168.13 KiB) Viewed 9737 times

Code: Select all

uses Bar3D, TeCanvas, Math, TeePNG;

var barRow: array of TBar3DSeries;
var myGradient: TTeeGradient;

procedure TForm1.FormCreate(Sender: TObject);
var i, j: Integer;
    tmpUp, tmpDown: Double;
begin
  Chart1.Legend.Visible:=false;
  Chart1.Aspect.Orthogonal:=false;
  Chart1.Chart3DPercent:=20;
  Chart1.Aspect.Zoom:=80;
  Chart1.Axes.Depth.Visible:=true;
  Chart1.Axes.Depth.LabelStyle:=talValue;
  Chart1.Axes.Depth.Increment:=2;
  Chart1.Axes.Left.SetMinMax(-20, -120);
  Chart1.Axes.Left.Increment:=20;
  Chart1.Axes.Bottom.SetMinMax(0, 10);
  Chart1.Axes.Bottom.Increment:=2;
  Chart1.Axes.Bottom.MinimumOffset:=10;
  Chart1.Axes.Bottom.MaximumOffset:=10;

  myGradient:=TTeeGradient.Create(nil);
  with myGradient do
  begin
    Visible:=true;
    Colors.Clear;
    Colors.Add(0, RGB(0, 0, 130));
    Colors.Add(0.2, RGB(0, 0, 255));
    Colors.Add(0.4, RGB(0, 255, 255));
    Colors.Add(0.6, RGB(255, 255, 0));
    Colors.Add(0.8, RGB(255, 0, 0));
    Colors.Add(1, RGB(130, 0, 0));
  end;

  SetLength(barRow, 10);
  for i:=0 to High(barRow) do
  begin
    barRow[i]:=Chart1.AddSeries(TBar3DSeries) as TBar3DSeries;

    with barRow[i] do
    begin
      Pen.Visible:=false;
      BarWidthPercent:=0;
      Depth:=0;
      Marks.Visible:=false;
      MultiBar:=mbNone;

      OnGetBarStyle:=BarGetBarStyle;

      for j:=0 to 19 do
      begin
        tmpUp:=-25-random(25);
        tmpDown:=-70-random(30);

        AddBar(j/2, tmpUp, tmpDown);
      end;
    end;
  end;
end;

procedure TForm1.BarGetBarStyle(Sender:TCustomBarSeries; ValueIndex:Integer;
                               var TheBarStyle:TBarStyle);
var tmpGradient: TTeeGradient;
begin
  tmpGradient:=myGradient;

  if Sender is TBarSeries then
    (Sender as TBarSeries).Gradient:=tmpGradient;
end;

Here is still pending to calculate the correct tmpGradient to assign at BarGetBarStyle. This should be calculated from myGradient manually.

Steema Central

3D Chart with vertical lines

3D Chart with vertical lines

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