Re: MI-L Drawing order within a layer

[Bob Young - www.bydesignwales.demon.co.uk]

Hi Berk

MapInfo uses an R Tree Structure. As each quad fills up it splits in two
to allow more objects to be added that are spatially close to one
another - hence the great performance compared with Ake!

The drawing order is dictated by the order in the quads, and not by the
order you add them or sort them.

The only effective way of getting objects on top of objects every time
is use of layer control - which is probably no use to you.

Hope this brief explanation helps.

Bob Young
By Design




In message <009401c0e522$83535820$[EMAIL PROTECTED]>, Berk
Charlton <[EMAIL PROTECTED]> writes
>Hello all -
>
>How does Mapinfo determine the drawing order of objects within the same layer?
>
>I have overlapping objects within the same layer, and I can't figure out how to
>promote some of them to draw on top.  I've assumed, perhaps wrongly, that this
>is determined by the drawing order of objects within the layer; ie, the objects
>that draw last within the layer are drawn on top.
>
>I've experimented with exporting the layer to a .mif file, and then sorting the
>.mif and .mid files based on object type, and then reimporting the layer.
>Everything works fine, and the row order reflects the order that the file was
>imported.  But it still doesn't seem to result in any predictability to how the
>objects will be drawn when they are back in .tab format.
>
>Any suggestions?
>
>Berk Charlton
>Geographic Marketing Solutions
>
>
>
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-- 
Bob Young - www.bydesignwales.demon.co.uk



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