Miguel wrote:
I have done some work on some of this ... especially related to lines and
'curly arrows'.
Concerns I have ...
Q: How does one specify XYZ coordinates?
Right now you just start listing decimal numbers:
draw line 1.0 1.0 1.0 2.0 2.0 2.0
Q: Are they just 3 numbers, or do we use some type of encapsulating
syntax? ... as in [x,y,z]
I decided for now not to fool with the compiler, so no commas, no
brackets. We could imagine a general (x,y,z) compilation that looks like
coordinateBegin
x
y
z
coordinateEnd
sort of like
expressionBegin
...
expressionEnd
I'm not sure that's really necessary, though.
It looks like what I have up right now has a bug that makes it so you
MUST show a percent scale if you are using coordinates.
draw line 100 1.0 1.0 1.0 2.0 2.0 2.0
I was having a problem with scale because I wasn't specifying which
mesh it referred to. So I guess I still don't quite have that. I'll
have to fix it.
Q: What is the relationship between a drawn object and models/frames? Can
an object exist in more than one frame?
haven't thought about that. My guess is that it is totally messing up
on that front. Right. Hmm. Say you have an animation. I could imagine
wanting to see the line between two atoms move with the animation,
like the way I set up measure. Oooh, yes, that could be interesting.
Or you might want to specify the model. Or you might want to specify a
fixed plane and then watch the animation move through it, for example.
Looks like I might need some keywords here. This certainly suggests
challenges await the naive.
I see that pmesh is NOT model-specific. Probably makes sense, because
those tend to be so mamouth. My idea here is to present fairly small
elements -- just a few points -- not huge geodesics.
Miguel
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