Steema Central

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unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, VCLTee.TeeSurfa, VclTee.TeeGDIPlus,
  VCLTee.TeEngine, Vcl.ExtCtrls, VCLTee.TeeProcs, VCLTee.Chart, VCLTee.TeeConst;

type
  TForm1 = class(TForm)
    Chart1: TChart;
    Chart2: TChart;
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
var
    x, z, plotVal: Integer;
    Series1: TColorGridSeries;
    Series2: TColorGridSeries;
begin
  Series1:=TColorGridSeries.Create(Self);
  Series1.IrregularGrid:=True;
  Series1.CenteredPoints:=True;
  // With CenteredPoints enabled, the resulting plot is offset compared to the
  // axis. It seems as if internally, 0.5 is subtracted from the X value for
  // CenteredPoints:=True, which is fine if the X spacing is 1, but not otherwise
  // See http://www.teechart.net/support/viewtopic.php?f=4&t=7706&p=30478
  Chart1.Title.Clear;
  Chart1.Title.Text.Add('CenteredPoints:=True, X from 0 to 10 in 0.25 steps');
  Chart1.Title.Text.Add('Version: ' + TeeChartVersion + TeeVCLMinorVersion);
  Chart1.Title.Text.Add('Build: ' + TeeVCLBuildVersion);
  Chart1.View3D := False;
  Chart1.AddSeries(Series1);

  Series2:=TColorGridSeries.Create(Self);
  Series2.IrregularGrid:=True;
  Series2.CenteredPoints:=False;
  // With CenteredPoints disabled, the plot is as expected
  Chart2.Title.Clear;
  Chart2.Title.Text.Add('CenteredPoints:=False, X from 0 to 10 in 0.25 steps');
  Chart2.View3D := False;
  Chart2.AddSeries(Series2);

  for x:=0 to 40 do
    begin
    for z:=-10 to 10 do
      begin
      plotVal := x+z; //Any data to plot
      Series1.AddXYZ(x*0.25, plotVal, z);
      Series2.AddXYZ(x*0.25, plotVal, z);
      end;
    end;
end;

end.