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Appendix B: QDXIMAGELIST
Rapid-Q Documentation by William Yu (c)1999 Appendix B: QDXIMAGELIST


QDXIMAGELIST Component

QDXImageList maintains a list of images for use in your programs. Unlike QImageList, you must create the imagelist using an Image Library.

QDXImageList Properties
FieldTypeR/WDefault




ParentQDXSCREENW

QDXImageList Methods
MethodTypeDescriptionParams




DrawSUB (Item%, X%, Y%, Mask%)Draw image on Screen4
LoadFromFileSUB (FileName$)Load imagelist1
LoadFromResourceSUB (Resource_Handle)Load imagelist from resource handle1
LoadFromStreamSUB (Stream AS QFILESTREAM/QMEMORYSTREAM)Load imagelist from stream1

QDXImageList Events
EventTypeOccurs when...Params






QDXImageList Examples
' Target practise w/DirectX for Rapid-Q by William Yu
' Move using arrow keys, to shoot, press SPACEBAR

$APPTYPE GUI
$TYPECHECK ON
$INCLUDE "RAPIDQ.INC"
$RESOURCE ships_DXG AS "ships.dxg"

DECLARE SUB DXTimerExpired
DECLARE SUB InitStars
DECLARE SUB KeyDown (Key AS BYTE, Shift AS BYTE)

CONST ScreenX = 400
CONST ScreenY = 300
CONST MaxStars = 150        '' Depending on your system, adjust as needed.

TYPE StarType
  X(MaxStars) AS INTEGER
  Y(MaxStars) AS INTEGER
  Z(MaxStars) AS INTEGER
END TYPE

DIM DXTimer AS QDXTimer
    DXTimer.Enabled = True
    DXTimer.Interval = 10
    DXTimer.OnTimer = DXTimerExpired
DIM Stars AS StarType
DIM MyShipX AS INTEGER
    MyShipX = 50
DIM EnemyShipX AS INTEGER
    EnemyShipX = ScreenX + 45
DIM EnemyShipY AS INTEGER
    EnemyShipY = 20
DIM Shoot AS INTEGER, ShootX AS INTEGER, ShootY AS INTEGER
    Shoot = False
DIM Hit AS INTEGER, HitCount AS INTEGER
    Hit = False

InitStars

CREATE Form AS QForm
  Center
  Caption = "DirectX Target Practise"
  ClientWidth = ScreenX
  ClientHeight = ScreenY
  'BorderStyle = bsNone           '' Setup fullscreen
  CREATE DXScreen AS QDXScreen
    Init(ScreenX, ScreenY)
    Align = alClient
    'FullScreen = True            '' Fullscreen mode
    Cursor = crNone              '' Hide Mouse
    CREATE DXImageList AS QDXImageList
      LoadFromResource(SHIPS_DXG)
    END CREATE
  END CREATE
  OnKeyDown = KeyDown
  ShowModal
END CREATE

SUB KeyDown (Key AS BYTE, Shift AS BYTE)
  SELECT CASE Key
    CASE 27
      Form.Close
    CASE 39
      MyShipX = MyShipX + 4
    CASE 37
      MyShipX = MyShipX - 4
    CASE IS = 32 AND Shoot = False
      Shoot = True
      ShootX = MyShipX + 20
      ShootY = ScreenY - 58
  END SELECT
END SUB


SUB InitStars
  DIM I AS INTEGER

  RANDOMIZE TIMER

  FOR I = 1 TO MaxStars
    Stars.X(I) = RND(ScreenX)
    Stars.Y(I) = RND(ScreenY)
    Stars.Z(I) = RND(3)
  NEXT I
END SUB

SUB DXTimerExpired
  DIM I AS INTEGER

  DXScreen.Fill(0)
  FOR I = 1 TO MaxStars
    SELECT CASE Stars.Z(I)
      CASE 0
        DXScreen.Pixel(Stars.X(I),Stars.Y(I)) = clWhite
        Stars.Y(I) = Stars.Y(I) + 3
      CASE 1 
        DXScreen.Pixel(Stars.X(I),Stars.Y(I)) = &HAAAAAA
        Stars.Y(I) = Stars.Y(I) + 2
      CASE ELSE
        DXScreen.Pixel(Stars.X(I),Stars.Y(I)) = &H555555
        Stars.Y(I) = Stars.Y(I) + 1
    END SELECT
    IF Stars.Y(I) > ScreenY THEN
      Stars.Y(I) = -1
      Stars.X(I) = RND(ScreenX)
    END IF
  NEXT I
  DXScreen.TextOut(10,10,"FPS: "+STR$(DXTimer.FrameRate), clWhite, -1)
  IF Hit THEN
    DXScreen.Circle(ShootX-HitCount/2,ShootY-20,ShootX+4+HitCount/2,ShootY-20+4+HitCount,&H2090FF,&H2090FF)
    IF HitCount = 0 THEN
      Hit = False
    ELSE
      HitCount = HitCount - 2
    END IF
  ELSE
    IF Shoot THEN
      SELECT CASE ShootX
        CASE EnemyShipX TO EnemyShipX+45
          IF ShootY > EnemyShipY AND ShootY < EnemyShipY+45 THEN
            EnemyShipX = ScreenX + 45
            EnemyShipY = EnemyShipY + 45
            Shoot = False
            Hit = True
            HitCount = 40
          END IF
      END SELECT
      DXScreen.Circle(ShootX,ShootY,ShootX+4,ShootY+4,&H2090FF,&H2090FF)
      IF ShootY < -4 THEN
         Shoot = False
      ELSE
         ShootY = ShootY - 4
      END IF
    END IF
    EnemyShipX = EnemyShipX - 2
    DXImageList.Draw(1, EnemyShipX, EnemyShipY, 0)
    IF EnemyShipX < -45 THEN
      EnemyShipX = ScreenX + 45
      EnemyShipY = EnemyShipY + 45
    END IF
  END IF
  DXImageList.Draw(0, MyShipX, ScreenY - 55, 0)
  DXScreen.Flip
END SUB

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