Delphi 与 DirectX 之 DelphiX(15): TPictureCollectionItem.DrawWaveX、DrawWaveY ...

此类函数有:
 
   


TPictureCollectionItem.DrawWaveX();

TPictureCollectionItem.DrawWaveXAdd();

TPictureCollectionItem.DrawWaveXAlpha();

TPictureCollectionItem.DrawWaveXSub();

TPictureCollectionItem.DrawWaveY();

TPictureCollectionItem.DrawWaveYAdd();

TPictureCollectionItem.DrawWaveYAlpha();

TPictureCollectionItem.DrawWaveYSub();
 
   

本例仅使用了 DrawWaveX、DrawWaveY, 效果图:

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代码文件:

---

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, DXDraws, StdCtrls, DXClass;



type

  TForm1 = class(TForm)

    DXDraw1: TDXDraw;

    DXImageList1: TDXImageList;

    DXTimer1: TDXTimer;

    Edit1: TEdit;

    CheckBox1: TCheckBox;

    procedure FormCreate(Sender: TObject);

    procedure DXTimer1Timer(Sender: TObject; LagCount: Integer);

    procedure Edit1Change(Sender: TObject);

    procedure CheckBox1Click(Sender: TObject);

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



const

  arr: array[0..31] of Smallint =

    (-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,7,6,5,4,3,2,-1,0,-1,-2,-3,-4,-5,-6,-7);



var

  PicItem: TPictureCollectionItem;

  amp,len: Integer;



procedure TForm1.Edit1Change(Sender: TObject);

begin

  len := StrToIntDef(Edit1.Text, 0);

end;



procedure TForm1.FormCreate(Sender: TObject);

const

  ImgPath1 = 'C:\Temp\DelphiX.bmp';

begin

  DXImageList1.DXDraw := DXDraw1;

  PicItem := TPictureCollectionItem(DXImageList1.Items.Add);

  PicItem.Picture.LoadFromFile(ImgPath1);



  DXDraw1.Align := alClient;

  DXTimer1.Interval := 30;



  Edit1.Text := '60';

  Edit1Change(nil);



  CheckBox1.Checked := True;

  CheckBox1.Caption := 'DrawWaveX';

end;



procedure TForm1.CheckBox1Click(Sender: TObject);

const

  bs: array[Boolean] of string = ('DrawWaveY', 'DrawWaveX');

begin

  CheckBox1.Caption := bs[CheckBox1.Checked];

end;



procedure TForm1.DXTimer1Timer(Sender: TObject; LagCount: Integer);

begin

  DXDraw1.Surface.Fill(0);



  if CheckBox1.Checked then

    PicItem.DrawWaveX(DXDraw1.Surface,

                     (DXDraw1.Width - PicItem.Width) div 2, (DXDraw1.Height - PicItem.Height) div 2,

                      PicItem.Width, PicItem.Height,

                      0,

                      arr[amp and 31],

                      len,

                      0)

   else

     PicItem.DrawWaveY(DXDraw1.Surface,

                     (DXDraw1.Width - PicItem.Width) div 2, (DXDraw1.Height - PicItem.Height) div 2,

                      PicItem.Width, PicItem.Height,

                      0,

                      arr[amp and 31],

                      len,

                      0);

  DXDraw1.Flip;

  Inc(amp);

end;



end.


 
   

窗体文件:

---

object Form1: TForm1

  Left = 0

  Top = 0

  Caption = 'Form1'

  ClientHeight = 154

  ClientWidth = 259

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'Tahoma'

  Font.Style = []

  OldCreateOrder = False

  OnCreate = FormCreate

  PixelsPerInch = 96

  TextHeight = 13

  object DXDraw1: TDXDraw

    Left = 8

    Top = 8

    Width = 185

    Height = 121

    AutoInitialize = True

    AutoSize = True

    Color = clBlack

    Display.FixedBitCount = False

    Display.FixedRatio = True

    Display.FixedSize = True

    Options = [doAllowReboot, doWaitVBlank, doCenter, do3D, doDirectX7Mode, doHardware, doSelectDriver]

    SurfaceHeight = 121

    SurfaceWidth = 185

    TabOrder = 0

    Traces = <>

  end

  object Edit1: TEdit

    Left = 212

    Top = 125

    Width = 38

    Height = 21

    TabOrder = 1

    Text = 'Edit1'

    OnChange = Edit1Change

  end

  object CheckBox1: TCheckBox

    Left = 120

    Top = 129

    Width = 86

    Height = 17

    Caption = 'CheckBox1'

    TabOrder = 2

    OnClick = CheckBox1Click

  end

  object DXImageList1: TDXImageList

    Items.ColorTable = {

      0000000000000000000000000000000000000000000000000000000000000000

      0000000000000000000000000000000000000000000000000000000000000000

      0000000000000000000000000000000000000000000000000000000000000000

      0000000000000000000000000000000000000000000000000000000000000000

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    Items = <>

    Left = 224

    Top = 8

  end

  object DXTimer1: TDXTimer

    ActiveOnly = True

    Enabled = True

    Interval = 1000

    OnTimer = DXTimer1Timer

    Left = 224

    Top = 48

  end

end