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Subject: 
Re: Thoughts on File Format for LDraw Animation
Newsgroups: 
lugnet.cad.dev
Date: 
Wed, 26 Oct 2005 21:03:02 GMT
Viewed: 
2568 times
  
In lugnet.cad.dev, James Reynolds wrote:
Isn't that more or less an MPD? By *not* reusing sub-models you get
a unique
name for every group, sub-group etc.

Or am I misunderstanding something?


No.  I've said this before and don't understand why others don't
understand this yet.  See my article:

http://james.magnusviri.com/lego/animatable_models/


My assumption was that you want to create a scripting language to
create your
animations.  I don't see how these ideas help us script anything.

Can you explain what I'm missing?

I really should write a part 2....   Basically, it involves
converting the model to povray (or whatever, blender even).  If the
conversion process retains the parent-child hierarchy, then you don't
have to go into the converted code and 1) add the hierarchy support
in the converted format and 2) you don't have to move the stuff.

Specifically, I've converted people's models and found it a pain to
fix those 2 things.  If they are modeled right to begin with (with
the intent to animate rather than build instructions using the STEP
command), then it is so much easier in the future.

I keep saying over and over.  Do not use the Ldraw format for
animation!  Use it for what it was intended: modeling.  Anything that
uses STEP and CLEAR to create animations is asking to be obsolete
very very very fast.

I guess I was not even considering STEP, ROTSTEP or CLEAR as meaningful for
animation. I was only really considering type 1 lines as useful, just to
describe the models components, so we agree.

I was thinking about a higher level scripting language that lets you manipulate
components and subcomponent attributes over time.  I've never studied what
cutting edge is, but I knew that LDraw was very far from that.  I think it is
good at describing all the components needed, but doesn't provide any kind of
time related changes (which is what animation is all about.)


This whole animation issue makes me dizzy.  It is one big circle:

http://news.lugnet.com/cad/?n=13192

James


Yes, and I was talking about trying to get to the second half of
what you
list.... scripting language.... without talking about GUIs for it.

Somewhere around here:

http://news.lugnet.com/cad/?n=13299

we got to talking details.  I still plan on writing this up and using
it.  That is when I finish other projects first.  But pretty soon
actually.

James

I look forward to it.  WHen I get home I'll reread that thread.

Kev



Message is in Reply To:
  Re: Thoughts on File Format for LDraw Animation
 
(...) I really should write a part 2.... Basically, it involves converting the model to povray (or whatever, blender even). If the conversion process retains the parent-child hierarchy, then you don't have to go into the converted code and 1) add (...) (19 years ago, 26-Oct-05, to lugnet.cad.dev)

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