← Back to team overview

kicad-developers team mailing list archive

Re: Experiments and considerations for more layer


On 09/05/2013 10:55 PM, Lorenzo Marcantonio wrote:
On Thu, Sep 05, 2013 at 02:14:03PM -0500, Dick Hollenbeck wrote:
You are correct about the model being somewhat exposed.  But the model is working nicely
everywhere else, and it is fast.

I could argue about the 'fast' thing. The indexed by layer structure IMHO is
very promising (the bounding box rtree would be the next logical step).

Of course some kind of global enumeration (call it dlist, or thru the
collectors) need to be maintained anyway.

BTW: This is the way how it is done in the VIEW class in the GAL - items are held using R-trees, which are created for every layer. It was also necessary to know which layers are occupied by a single item, so there is ViewGetLayers() function that returns an int[] containing layer numbers for the given item. The layer numbers are computed during the function call (ie. ViewGetLayers() is overridden in derived classes, so eg. TRACK may return a different set of layers than SEGVIA), but I lean toward using std::bitset.


Follow ups