Re: [Gzz] View2D enhancing.

[Tuomas Lukka]

On Tue, Jul 08, 2003 at 01:19:02AM +0300, Matti Katila wrote:
> 
> Hi boys and girls,
> 
> 
> I run into problems with View2D. I would like to make it use faster way 
> to change scene i.e., through setParams. As you already know we have more 
> than one main node with FenPDF. I have made a simple interface to change 
> scene's parameters but it doesn't work because no one keeps track of all 
> possible coordinate systems since recursive view2ds can be just one 
> instance in the whole view. 
> 
> So can we add a new parameter to View2D?
> 
>     public abstract void render(VobScene vs, 
> -             Object plane,
> +             Object plane, Object key,
>               int matchingParent,
>                   int box2screen, int box2plane
>                       );
> 
> 
> With this change and simple helper class:

Umm, I'm not at all in the clear about what you're trying to achieve
and how.

You need to give lots more detail about this so that everyone can understand
the issues.

> 
> /** Very simple util to save integer in map.
>  */
> public class CoordsysCache {
>     private Map coords = new WeakHashMap(10);
>     public void set(Object key, int cs) {
>       coords.put(key, new Integer(cs));
>     }
>     
>     public int get(Object key) {
>       return ((Integer)coords.get(key)).intValue();
>     }
> }
> 
> 
> We could use setParams easily and make things faster.

This is very bad on Kaffe and possibly others, creating lots of
Integer objects for the GC to worry about.

        Tuomas