' BlitzMax Fade Routines
' - CrossFade
' - FadeToWhite
' - FadeToBlack
'
' Freeware, (C) 2005 by xlsior/Marc van den Dikkenberg
'
' - Press any key to progress to the next fade effect.
' - Press Escape to exit.
'
' Note: the 'perc' variable is used to define the intensity of an effect percentage-wise, and
' and should be passed a value between 0 and 100 (percent).
' Use any two full-screen images to see these effects.
Graphics 800,600,32,60
SetColor 255,255,255
Local Counter:Int
pic1=LoadImage("pic1.png")
pic2=LoadImage("pic2.jpg")
DrawImage (pic1,0,0)
Flip
WaitKey()
While Not KeyHit(Key_Escape)
' do a crossfade
For Counter=0 To 100
CrossFade(pic1,pic2,Counter)
Flip
Next
WaitKey()
If KeyDown(key_escape) Then Exit
' ...and back again!
For Counter=0 To 100
CrossFade(pic2,pic1,Counter)
Flip
Next
WaitKey()
If KeyDown(key_escape) Then Exit
' Fade to white
For counter=0 To 100
DrawImage (pic1,0,0)
FadeToWhite(counter)
Flip
Next
WaitKey()
If KeyDown(key_escape) Then Exit
' Re-draw the image
DrawImage (pic1,0,0)
Flip
WaitKey()
' ...and fade to black
For Counter=0 To 200
DrawImage (pic1,0,0)
FadeToBlack(Counter/2)
Flip
Next
WaitKey()
If KeyDown(key_escape) Then Exit
Wend
Function FadeToWhite(perc:Float)
If perc>100 Then
perc=100
ElseIf perc<0 Then
perc=0
End If
If perc>0 Then
SetColor 255,255,255
SetBlend (alphablend)
SetAlpha (perc/100)
DrawRect (0,0,GraphicsWidth(),GraphicsHeight())
End If
End Function
Function FadeToBlack(perc:Float)
If perc>100 Then
perc=100
ElseIf perc<0 Then
perc=0
End If
If perc>0 Then
SetColor 0,0,0
SetBlend (alphablend)
SetAlpha (perc/100)
DrawRect (0,0,GraphicsWidth(),GraphicsHeight())
End If
End Function
Function CrossFade(pic1:timage,pic2:timage,perc:Float)
If perc<1 Then
perc=1
ElseIf perc>100 Then
perc=100
End If
SetBlend (SolidBlend)
SetColor 255,255,255
DrawImage (pic1,0,0)
SetBlend (Alphablend)
SetAlpha (perc/100)
DrawImage (pic2,0,0)
End Function |
