Hello Charlie,
I thought about this over the weekend and figured out, that I have made a
mistake in the description:
for the last point you will need a fourth image showing the string without any
characters of the current word: "Here is a". Use this fourth image to blend
with the third image as described.
Overall this looks like some work for the GPU... Maybe you will hit a
performance wall.
best,
Achim Breidenbach
Boinx Software
On 24.01.2011, at 11:34, Charlie Francis wrote:
> Thanks,
>
> Toby: Thank you very much for providing the source in that download. I'm very
> interested in seeing how you've done that.
>
> Achim: Thanks for the guide, I'll try and have a go at implementing it today.
>
> It does seem very strange how Quartz doesn't have a per character animation
> function.
>
> Regards,
> Charlie
>
> On 22 January 2011 09:41, Achim Breidenbach <ac...@boinx.com> wrote:
> Hi Charlie,
>
> I think, you can do it with rendering multiple images and compare them:
>
> (assuming your sample string "Here is a long string")
> - first you render the image you have already in your composition with the
> truncated text. (e.g "Here is a lo")
> - second image would be the same truncated text but including the complete
> word. This will involve some jave script patch to figure out where the
> current word will end. ("Here is a long")
> - now you can compare the "Line Count"- output of the "Image with String"
> patches and see, if they are different.
> - if the line count is the same, you are save to use the first image.
> - if not, you render only the current word, but truncated, into an image.
> (just "lo")
> - use the width of that third image to blend the first two images with a
> "Swipe" patch ("Width"-parameter = "0")
>
> I didn't try it myself but I am certain this will work.
>
> Achim Breidenbach
> Boinx Software
>
> On 21.01.2011, at 17:20, Charlie Francis wrote:
>
> > Hi guys,
> >
> > I've been trying to look for a type writer effect. I'm sure I've seen one
> > somewhere before, but I can't seem to find it.
> >
> > So I tried to make one! Here are my two attempts.
> >
> > The one on the left "Char by Char" uses the String Truncate function to put
> > each character up at a time, the problem with this is that when a long word
> > comes up near the boundary of the box it gets wrapped half way through
> > printing.
> >
> > I came up with the one of the right, using the Bars Swipe Transition. It
> > takes the amount of lines produced combined with a constant of 0.75 (this
> > was just a rough guess) to calculate the width of the bars. I still have to
> > do some calculations to work out a constant per line speed, but it's ok for
> > now.
> >
> >
> > Is there a way to combine these two effects? So that the characters write
> > on one by one, as in the first example, whilst keeping the singular image
> > of the second. Or has anyone created such an effect before.
> >
> >
> >
> > This is part of a bigger plan, to queue the text coming in, and have
> > multiple messages, kind of like a chat box. with old messages scrolling out
> > of view.
> >
> > Thanks,
> > Charlie
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>
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