Subject:
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Re: New MAC Modeller for LDRAW FILES
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Newsgroups:
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lugnet.cad.dev.mac
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Date:
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Tue, 25 Feb 2003 05:30:29 GMT
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Viewed:
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4012 times
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In article <HAtJ2q.Gup@lugnet.com>,
"Andrew Allan" <aallan@ozemail.com.au> wrote:
> Thanks for the feedback guys,
>
> It’s good to see that the program does run – and no reported crashes?
>
> I will answer some of the comments first,
> Rendering – How fast is the rendering relative to the Carbon Version? My
> observations are as follows; on my development machine (Dual 1GHz MDD,
> OS10.2.3, 512k) the actual drawing time seems to be faster than that of
> Ldraw Viewer 0.4.2. I guess the hardware accelerated graphics of Quartz
> Extreme is working. But I do have a problem, as yet when rendering, I have
> not been able to accurately measure the rendering time as, the OS seems to
> send the info to the graphics card and then return directly to program
> operation. As yet I have not been able to get the graphic card to tell the
> program when it has completed rendering (thus offering very little useable
> feedback information for my timers), this make the rotation less smooth than
> the Carbon Version.
Measuring load and display times using the menu bar clock. To load and
display the dat for my caboose took 15 seconds in MLM and 3 seconds to
load and display the dat in LDV 0.4.2.
>
> Chris – Rendering, it’s a bit of both, actually I’ve optimised the Cocoa
> version more than the Carbon version, however, the optimisation is more than
> offset by Objective-C which places massive overhead on the system (I guess
> this is the price of more flexibility). For this reason, I did indicate that
> I believe that earlier Macs might be better sticking to the Carbon Version.
> I will however continue to work in this area, as there are some compiler
> settings that might affect this performance for the better.
I know it is, but I still have a hard time accepting that my two year
old powerbook is an "ealier" Mac. Also, the difference in performance is
extreme. Rotation in LDV 0.4.2 is _fast_. I mean _fast_. Rotation (of my
caboose) in MLM 0.1 is _slow_.
I noticed something strange that might explain why rotation is so slow
for my. I loaded a small dat for my Mini which you can find here
http://users.rcn.com/cjmasi/caboose_comparisson.htm
and as I rotated the model, my computer kept trying to redraw it, even
though I hadn't stopped rotating it. A ghost image of the whole model
would flicker as the Mini was rotated. I just noticed that the caboose
is doing the same thing. It is flickering as I rotate it.
> Chris - The name, you’re right. Using the Lego word is likely to provoke a
> reaction one day so I should change it – any suggestions?
If I come up with anything I'll let you know.
> Ldraw Viewer 0.4.2; the re-appearance of the Cancel bug. Chris, I’ll look
> into it, I haven’t tested for this bug in the last release because I haven’t
> altered that code since I originally corrected the bug (NB neither have I
> mounted 10.2.4 on my system). How is the program other wise? As indicated in
> the release notes, the memory handling has been completely rewritten – has
> this solved the unexplained crashing during operation.
Sorry, I haven't had time to do any testing. I beat up on LDV 0.4.0, so
much because I was using it for a project associated with my job. I'll
just avoid the cancel button.
> Chris, also in response to your observations of slow part selection, I
> completely revamped the part selection and visibility options, have you
> found these to be a benefit?
I don't think I made a "slow part selection" comment, did I? I do think
that I commented that when a black part was selected, the change in
appearance wasn't substantial enough to make it clear that the part had
been selected.
> Andrew…
Chris
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Message has 1 Reply:
 | | Re: New MAC Modeller for LDRAW FILES
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| Wow even better feedback! Keep it comming I'll discuss both versions - Cocoa and Carbon / Classic Firstly Cocoa Load times, I concur they are much slower (compared to the Carbon version), especially a model of 800+ lines of code, at this stage I (...) (24 years ago, 25-Feb-03, to lugnet.cad.dev.mac)
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Message is in Reply To:
| | Re: New MAC Modeller for LDRAW FILES
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| Thanks for the feedback guys, It’s good to see that the program does run – and no reported crashes? I will answer some of the comments first, Matt – not all parts are drawing; have you set the Ldraw folder location in “Preferences” yet? Matt – part (...) (24 years ago, 24-Feb-03, to lugnet.cad.dev.mac)
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