Hello omniVERSE,

this is easy to do but this take time. Here is the method:
1) I render completely the first image. I choose the area which I will
render, say the door. I put this into the command line.
2) I begin the animation rendering. So I get a given number (depend on
animation) of partial image which are on the first row, with black color
around.
3) I take each image into corel photo paint. With a special tool I
select the non-black area. I copy and paste into a new document and save
it into bmp (for example). And I have myst first image with good
dimension.
4) I do it for each image (a nightmare :)).
5) I compute the animation with the images.
6) In my program (a game) I load the first image (a complete image).
When I click, say on the door, I load the video which I place at the
right position on my image. The complete image don't disappear (I choose
a correct update method for updating the screen) and the video play at
the correct place. This work perfectly well (I have tested) but take
time to do the animation :).

If someone which know well the code (perhaps Nathan) could look at it
(when one render a piece of an image, the output image is only this
piece without black color around) this could be cool :)

Fabian.

omniVERSE wrote:
> 
> No.  And since the partial images get put on the first row I don't see any
> feasible way of simply chroma-keying the black backgrounds out, which if you
> had any black in the scene itself would also get blanked out anyway.  The
> non-descript background might be clear if Alpha channeled too but once again
> there's the problem with the partial image showing up in the wrong place, so
> I see no way as is to compile them together with whole images.
> Would need a different method of image production, I think might be the only
> potential answer.  Seems like the idea about a whole image remaining for
> each subsequent partial render would go nicely with this concept.
> 
> Bob
> 
> Fabian Brau <fab### [at] umhacbe> wrote in message
> news:3819A015.128291F5@umh.ac.be...
> > Hello,
> >
> > I have seen long time ago that one can render only a part of an image
> > (you put some command in the command line). This is really cool to
> > render some animation, for example:
> >
> > you have an image with a door, when you click on the door (this is a
> > program), it open. But just the door move not the whole scene, so you
> > render only this part of the picture -> gain of render time and gain of
> > animation size. But suppose that you have an image 320*240, you render a
> > just a part of it with the size 100*200, the image you ontain is still a
> > 320*240 but with black color around the part of the image: you don't
> > obtain a 100*200 image. Ok with PSP or corel photo paint it is easy to
> > get only the relevant part of the image but this take much time because
> > you must work on each image before construct the animation. It is
> > possible to render and GET only the relevant part of the image?
> >
> > Thanks
> >
> > Fabian.

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