Hi,
I'm new to OpenSCAD's animation feature, and I'm playing around with
some simple animation scripts. Generally, it's very useful, however,
I'm running into a fairly annoying problem.
I started with this guide
(
https://www.instructables.com/id/Animating-with-OpenSCAD/) which
recommended wrapping your use of lookup() in a function like:
loc = [
[0,0,0], // initial position
[0,0,0], // top body shifts over slightly
[0,0,10], // lifts leg up
[0,5,10], // moves leg forward
[0,5,0], // puts leg down
[0,5,0], // puts leg down
[0,5,0], // puts leg down
[0,5,0], // puts leg down
[0,5,0], // puts leg down
[0,5,0], // puts leg down
];
function xyz(t,i) = lookup(t, [
[0/len(loc),loc[0][i]],
[1/len(loc),loc[1][i]],
[2/len(loc),loc[2][i]],
[3/len(loc),loc[3][i]],
[4/len(loc),loc[4][i]],
[5/len(loc),loc[5][i]],
[6/len(loc),loc[6][i]],
[7/len(loc),loc[7][i]],
[8/len(loc),loc[8][i]],
[9/len(loc),loc[9][i]],
[10/len(loc),loc[10][i]],
]);
Then you can animate something by simply plugging in a call to
`xyz($t, <0|1|2>)` inside a translate or rotate statement.
Yet, as you can see, this violates the DRY rule, and makes for some
very tedious and unnecessary code. For every new step added to my
`loc` array, I need to add an entry to the array inside my `xyz()`
function as well.
Is there any way to rewrite my `xyz()` function to generate the array
on demand so I don't have to maintain what are effectively duplicate
arrays? Is a more efficient way to do this that I'm not seeing?
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