Re: Another thread on Oplot...and handle graphics.

[Shai Ayal]

So you have both bitmap & vector hardcopy. This is excellent.

I would recommend implementing the "print" command as in matlab/octave
before spending time on a nice dialogue box.

Shai

On 7/20/05, Ole Jacob Hagen <address@hidden> wrote:
> 
> Since Oplot is using Coin3D as visualisation library, Oplot can use two
> methods to generate postscript files.
> 
> Method 1:
> 
> OffscreenRenderer generates texture maps of on the fly  as bitmaps or
> postscript.
> 
> Offscreen rendering is internally done through either a GLX offscreen
> context (i.e. OpenGL on X11) or a WGL (i.e. OpenGL on Win32) or AGL
> (i.e. OpenGL on the Mac OS) ditto. If the OpenGL driver supports the
> pbuffer extension, it is detected and used to provide
> hardware-accelerated offscreen rendering.
> 
> One particular usage of the SoOffscreenRenderer is to make it render
> frames to be used for the construction of movies. The general technique
> for doing this is to iterate over the following actions:
> 
>     * move camera to correct position for frame
>     * update the |realTime| global field (see explanation below)
>     * invoke the SoOffscreenRenderer
>     * dump rendered scene to file
> 
> ..then you use some external tool or library to construct the movie
> file, for instance in MPEG format, from the set of files dumped to disk
> from the iterative process above.
> 
> Method 2:
> 
> SoVectorizeAction is the base class for vectorization of Coin scene graphs.
> 
> Currently supported geometry:
> 
>     * Triangles (polygons will be tessellated)
>     * Line segments
>     * Points (can be drawn as circles or squares)
>     * 2D text
>     * 3D text
>     * Images
> 
> Texturemaps are not supported.
> 
> SoOffscreenRenderer and SoHardCopy is included in the Coin3D library.
> 
> Oplot is using SoOffscreenRenderer as default today, but a dialog-based
> printing dialog where a user can choose what method to choose from is
> under development. ;-)
> 
> Cheers,
> 
> Ole J.
> 
> 
> 
> 
> Shai Ayal wrote:
> 
> >Ole,
> >
> >One of the most importand features, IMHO, is hardcopy. Do you support
> >"prinitng" to some vector file format (e.g. ps/pdf/fig) ? If not this
> >should certainly be on your high priority list. Note: It is important
> >that you support some vector format which is resolution independant so
> >that real hardcopy on a printer/published paper will look acceptable.
> >Bitmap formats are nice (and might be easier to implement) but are
> >good for screen display at most.
> >
> >Shai
> >
> >
> >
> 
>