2013-06-19 07:47

' Here's a simple 2D rotation for Rapid-Q by William Yu

     $TYPECHECK ON
     $RESOURCE BMP_RES AS "rapidq.bmp"

     CONST PI = 3.141593
     CONST True = 1
     CONST False = 0

     DIM DEGREE AS INTEGER
     DEGREE = 0

     DECLARE SUB CanvasOnPaint
     DECLARE SUB Timer1OnTimer

     DIM OffBMP AS QBITMAP
     DIM BMP AS QBITMAP
     BMP.BMPHandle = BMP_RES
     OffBMP.Height = BMP.Height + 100
     OffBMP.Width = BMP.Width + 100
     DIM ScaleX AS INTEGER, ScaleY AS INTEGER
     ScaleX = BMP.Width/2
     ScaleY = BMP.Height/2
     DIM Timer1 AS QTIMER
     Timer1.Interval = 1
     Timer1.OnTimer = Timer1OnTimer

     CREATE Form AS QFORM
      CREATE Canvas AS QCANVAS
       OnPaint = CanvasOnPaint
      END CREATE
      Center
      CAPTION = "Rotating Logo"
      SHOWMODAL
     END CREATE

     SUB Timer1OnTimer
      DIM X AS INTEGER, Y AS INTEGER
      DIM C1 AS DOUBLE, S1 AS DOUBLE, S2 AS DOUBLE, C2 AS DOUBLE
      DIM T1 AS DOUBLE, T2 AS DOUBLE

      OffBMP.FillRect(0,0,OffBMP.Width,OffBMP.Height,0)

      C1 = COS(DEGREE*PI/180)
      S1 = -SIN(DEGREE*PI/180)
      S2 = -S1
      C2 = C1
'  T1 = (0-ScaleX)*COS(DEGREE*PI/180)-ScaleY*SIN(DEGREE*PI/180)+ScaleX
'  T2 = ScaleX*SIN(DEGREE*PI/180)-ScaleY*COS(DEGREE*PI/180)+ScaleY
      T1 = -ScaleX*COS(DEGREE*PI/180)+ScaleY*SIN(DEGREE*PI/180)+ScaleX
      T2 = -ScaleX*SIN(DEGREE*PI/180)-ScaleY*COS(DEGREE*PI/180)+ScaleY


      FOR Y = 0 TO BMP.Height
       FOR X = 0 TO BMP.Width
      '' Almost like 3D
        IF BMP.Pixel(X,Y) <> 0 THEN
         OffBMP.Pixel(20+X*C1+Y*S1+T1, 40+X*S2+Y*C2+T2) = BMP.Pixel(X,Y)
         OffBMP.Pixel(20+X*C1+Y*S1+T1+1, 40+X*S2+Y*C2+T2) = BMP.Pixel(X,Y)
        END IF
       NEXT
      NEXT

      CALL CanvasOnPaint
      Timer1.Interval = 1
      DEGREE -= 10
     END SUB

     SUB CanvasOnPaint
      Canvas.Draw(0, 0, OffBMP.BMP)
     END SUB

2013-06-19 07:47