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Subject: 
Re: Yet another idea - Portable Ldraw system
Newsgroups: 
lugnet.cad.dev, lugnet.off-topic.geek
Date: 
Thu, 15 Aug 2002 21:50:00 GMT
Viewed: 
1651 times
  
In lugnet.cad.dev, Don Heyse writes:
In lugnet.cad.dev, Jeremy H. Sproat writes:
What Linux (and to some extent, Windows too) really needs is a semi-fast
LEdit clone.  I understand that one of the newer tools (LDGlite?) has an
LEdit mode, but is kinda slow without hardware acceleration.
So it all boils down to speed?  Has anyone actually tried the LEdit
mode (besides the Mac folks who currently have no other option)?
I'm just wondering how much of a speedup is required.  I've used it
for small things on my 486 laptop, but that was under win95.  I've
never tested the linux version on a PC that slow.

It finally dawned on me (after a less than subtle yet very helpful IM from
someone who shall remain nameless :-) that you're the LDGLite author.  :-,

I've tried the LEdit mode, and gave up in frustration due to the slow redraw
(particularly with the text).  I haven't formalized my list of (complaints?
bugs?  dunno) concerning LDGLite, but I can if you want.

But there's one thing I've noticed that's in common with all LDraw tools
based on OpenGL, and that's that they're much slower than the original
LDraw.exe.  Like by an order of magnitude.  Please note that I am running
Windows 2000 on a non-3d-accelerated laptop, a notoriously slow combination
for OpenGL apps.

I'm not thinking so much about a small memory footprint, but more along the
lines of getting X out of the picture.  I imagine the goal is to keep such a
distro as simple as possible.  Eliminate X, and you've saved yourself 90% of
your configuration (and memory) woes.  I don't know if Allegro or SDL are
shared libs, but they ARE cross-platform, and on Linux they can use the
video framebuffer (or at least Allegro can, not sure about SDL).
This sounds like the approach taken by the XMame on CD project.  If
only there were a project like this that supported OpenGL, or does
Mesa3D compile on SDL or SVGAlib?

Good question.  I couldn't find much on the libsdl.org website about that,
but IIRC, SDL employs its own OpenGL API (which may or may not be based on
Mesa3D, I dunno).

Cheers,
- jsproat



Message has 1 Reply:
  Re: Yet another idea - Portable Ldraw system
 
(...) Sure, go ahead and elaborate. I can't fix it if I don't know about it. I did actually try to fix the text update speed at one point. That's a well known problem with the glut library I use. I can't remember why I stopped working on a fix for (...) (22 years ago, 16-Aug-02, to lugnet.cad.dev, lugnet.off-topic.geek)

Message is in Reply To:
  Re: Yet another idea - Portable Ldraw system
 
(...) So it all boils down to speed? Has anyone actually tried the LEdit mode (besides the Mac folks who currently have no other option)? I'm just wondering how much of a speedup is required. I've used it for small things on my 486 laptop, but that (...) (22 years ago, 15-Aug-02, to lugnet.cad.dev, lugnet.off-topic.geek)

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