[Gambas-user] using Sin() to produce a specific range of values
kevinfishburne at ...1887...
Sun Jul 10 08:33:27 CEST 2011
On 07/10/2011 02:02 AM, Ian Haywood wrote:
> On Sun, Jul 10, 2011 at 3:37 PM, Kevin Fishburne
> <kevinfishburne at ...1887...> wrote:
>> I need to use the Sin() function to calculate an output range from an
>> input range. The advantage of Sin() is that it's not linear; it makes a
>> nice smooth curve of values sort of like a sound wave in an audio editor.
> this example project does this using 50 numbers, you can adjust the stepping
> in the FOR loop to change the number of numbers produced.
Hi Ian. The code attached is:
Public Sub Main()
Dim i As Float
For i = 0.0 To 1.0 Step 0.02
Print CInt(255 * Sin(Pi(i)))
It's output values when run are:
That worked extremely well, thank you so much. The Pi part is
interesting. I thought I had it working, as it worked very similarly to
your code, but I didn't use Pi. I was using something like Rad(degrees),
cycling from 0 to 360 instead.
Something I just corrected was that I needed those values inversed. It
should have started at 255, went to zero in the middle, then back to
255. I figured it out, so I guess I'm not a completely jackass. :)
Thanks so much!
Also, to the mailing list in general, please let me know if it's okay if
every now and then if I post a link to what I've done so far with
GAMBAS. Part of me thinks it's okay because we should all be proud of
what we've programmed with it, but I don't want to offend the list. Any
input on that is appreciated. Sometimes when someone helps me (a lot
around here!) I want to show them the immediate results of the fix, but
I'm a bit reserved as I don't want to pollute an already busy list.
Maybe there should be a new gb mailing list just for accomplishments?
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