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 程式師世界 >> 編程語言 >> 更多編程語言 >> Delphi >> Delphi與DirectX之DelphiX(84): TDIB.InitLight()、DrawLights();

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

編輯:Delphi

本例效果圖:

代碼文件:

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.

窗體文件:

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 142
  ClientWidth = 177
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  OnDestroy = FormDestroy
  PixelsPerInch = 96
  TextHeight = 13
  object DXPaintBox1: TDXPaintBox
   Left = 8
   Top = 8
   Width = 129
   Height = 126
   AutoStretch = False
   Center = False
   KeepAspect = False
   Stretch = False
   ViewWidth = 0
   ViewHeight = 0
   OnMouseMove = DXPaintBox1MouseMove
  end
end

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