;VERY cool magnifying glass demo.
Graphics 640,480,0,2
HidePointer()
img = CreateImage(640,480)
SetBuffer ImageBuffer(img)
SeedRnd(22432)
For x = 1 To 9000
Color Rnd(255),Rnd(255),Rnd(255)
Rect Rnd(640),Rnd(480),Rnd(20),Rnd(20),1
Next
Global dimg = CreateImage(150,150)
SetBuffer BackBuffer()
While Not KeyDown(1)
Cls
DrawImage img,(-(MouseX())+320)/3,(-(MouseY()/1)+240)/3
drop(MouseX(),MouseY(),50,1)
Flip False
Wend
End
Function drop(x,y,r,s# = 1)
LockBuffer ImageBuffer(dimg)
LockBuffer BackBuffer()
For x1 = -r To r
For y1 = -r To r
dist# = Sqr(x1*x1 + y1*y1)
If dist# <= r Then
WritePixelFast1 x1+r,y1+r,ReadPixelFast1(x1*(dist#/r*s#)+x,y1*(dist#/r*s#)+y),ImageBuffer(dimg)
EndIf
Next
Next
UnlockBuffer BackBuffer()
UnlockBuffer ImageBuffer(dimg)
Color 0,0,0
Oval x-r+1,y-r+1,2*r-1,2*r-1,1
DrawImage dimg,x-r,y-r
SetBuffer ImageBuffer(dimg)
Color 0,0,0
Rect 0,0,151,151,1
SetBuffer BackBuffer()
End Function
Function writepixelfast1(x,y,col,buffer)
If x > -1 And y > -1 Then
If x < GraphicsWidth()-1 And y < GraphicsHeight()-1 Then
WritePixelFast x,y,col,buffer
EndIf
EndIf
End Function
Function readpixelfast1(x,y)
If x > 0 And y > 0 Then
If x < GraphicsWidth() And y < GraphicsHeight() Then
Return(ReadPixelFast(x,y))
EndIf
EndIf
Return 0
End Function |
