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Re: object graphic / direct graphic [message #26596 is a reply to message #26532]

Wed, 12 September 2001 22:42

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

From: "Mark Hadfield" <m.hadfield@niwa.cri.nz>
> 1,000 points: 0.5 s
> 2,500 points: 3 s
> 5,000 points: 15 s
>
> So it looks like the time to write to vector files is quadratic or worse.

It has been pointed out to me that this is probably a consequence of trying
to get Z overlap right. For bitmap output a Z buffer is used (which is fast)
but for vector output the atoms are sorted before they are drawn (which is
slow when there are a lot of them).

For many types of plots, Z overlap isn't crucial, so perhaps there could be
an option to disable the sorting.

---
Mark Hadfield
m.hadfield@niwa.cri.nz http://katipo.niwa.cri.nz/~hadfield
National Institute for Water and Atmospheric Research

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		Re: object graphic / direct graphic By: Mark Hadfield on Sun, 09 September 2001 15:44
		Re: object graphic / direct graphic By: Mark Hadfield on Wed, 12 September 2001 22:42

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