someone can give me a sugestion to make this?
user need scratch to find the prize *-*
i remember have this tutorial in many time ago on the forum but i dont find this *-*
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Android Question make a scratch
- Thread starter Douglas Farias
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someone can give me a sugestion to make this?
user need scratch to find the prize *-*
i remember have this tutorial in many time ago on the forum but i dont find this *-*
ok i make a img view and a panel here now
how to add color when touch ?
Sub Panel1_Touch (Action As Int, X As Float, Y As Float)
End Sub
how to add color when touch ?
Sub Panel1_Touch (Action As Int, X As Float, Y As Float)
End Sub
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ty here is the project if help someone
erel 1 question its possible know how much % of my image view is visible?
exemple if user scratch 80% show a msgbox
msgbox("Well done!","test")
erel 1 question its possible know how much % of my image view is visible?
exemple if user scratch 80% show a msgbox
msgbox("Well done!","test")
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Calculate how many "Pixel" the image have in total.
Check each pixel if it is a transparent one.
With a little bit algebra you should be able to calculate how many % is transparent.
Check each pixel if it is a transparent one.
With a little bit algebra you should be able to calculate how many % is transparent.
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But it will be very slow.
To optimize maybe check 1 out of 4 pixels or so. (As smudging would imply spatial correspondence)
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I wanted to give an answer (not a solution) which should give an nearly correct value.
I dont know how much time it will take on an canvas-image. I do not work much with images. Especially on android.
To check just one out of four sounds like a reasonable value. It should be ok for such an "issue" here.
I dont know how much time it will take on an canvas-image. I do not work much with images. Especially on android.
To check just one out of four sounds like a reasonable value. It should be ok for such an "issue" here.
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I have tried it but i feel it not to be "very slow"?
My testproject is based on the signaturecapture example...
In short the code is
B4X:
Dim p() As Int
p = getPixels(SD.Canvas.Bitmap, 0, 0, 0, 0, SD.Canvas.Bitmap.Width, SD.Canvas.Bitmap.Height)
'Log("SizeOf(p)="&p.Length)
Dim MaxPixels As Long = p.Length
Dim TransPixels As Long = 0
For Each pdummy As Int In p
Dim alpha As Int = Bit.UnsignedShiftRight(Bit.AND(pdummy, 0xff000000), 24)
If alpha = 0 Then
TransPixels = TransPixels +1
End If
Next
Dim found As Float = (TransPixels/MaxPixels)*100
Log("Scratched= "&NumberFormat(found,0,0)&"%")i have uses this in sub Panel1_Touch to get the %
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