Delphi与DirectX之DelphiX(84): TDIB.InitLight()、DrawLights();

本例效果图:

代码文件:

unit Unit1;
interface
uses
　 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
　 Dialogs, DIB, StdCtrls;
type
　 TForm1 = class(TForm)
　　 DXPaintBox1: TDXPaintBox;
　　 procedure FormCreate(Sender: TObject);
　　 procedure FormDestroy(Sender: TObject);
　　 procedure DXPaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
　　　 Y: Integer);
　 end;
var
　 Form1: TForm1;
implementation
{$R *.dfm}
var
　 dib: TDIB;
procedure TForm1.DXPaintBox1MouseMove(Sender: TObject; Shift: TShiftState; X,
　 Y: Integer);
var
　 a: TLightArray;
begin
　 DXPaintBox1.DIB.Assign(dib);
　 SetLength(a, 1);
　 a[0].X := X;
　 a[0].Y := Y;
　 a[0].Size1 := 4;
　 a[0].Size2 := 4;
　 a[0].Color := clWhite;
　 DXPaintBox1.DIB.InitLight(1, 1);
　 DXPaintBox1.DIB.DrawLights(a, clBlack);
　 DXPaintBox1.Repaint;
end;
procedure TForm1.FormCreate(Sender: TObject);
const
　 ImgPath1 = 'C:\Temp\DX.jpg';
begin
　 dib := TDIB.Create;
　 dib.LoadFromFile(ImgPath1);
　 DXPaintBox1.DIB.Assign(dib);
　 DXPaintBox1.Width := dib.Width;
　 DXPaintBox1.Height := dib.Height;
　 DXPaintBox1.Repaint;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
　 dib.Free;
end;
end.