[OpenSCAD] Why is this so heavy to OpenScad?
rcmpersiano at gmail.com
Sun Nov 10 17:50:50 EST 2019
To get it simpler just the hull of 8 spheres.
A domingo, 10/11/2019, 22:37, Jordan Brown <openscad at jordan.maileater.net>
> On 11/10/2019 2:32 PM, adrianv wrote:
> <http://forum.openscad.org/file/t2477/mcad_box.png> <http://forum.openscad.org/file/t2477/mcad_box.png>
> [ MCAD's ] "rounded" box has a bunch of extra polygons because of whatever
> craziness is going on with the "rounding".
> That looks really familiar. I have a rounded-end-cylinder polygon module
> that I use in a number of places, that I happen to be using today, and it
> has some of the same issues. Or did, until I got obsessive and fixed
> several of them.
> Without looking at the sources, it looks like it isn't so much doing
> anything stupid as it is using naïve techniques, building the edges out of
> cylinders and the corners out of spheres. Unless you're really careful,
> the faces on low-poly corners like that won't line up. It also looks like
> it's got the faces of the round things aligning with the sides of the box,
> without accounting for the fact that OpenSCAD's polygon-cylinders have a
> diameter measured vertex-to-vertex, not face-to-face. It needs
> function adj(d, sides) = d/cos(360/sides/2);
> which will give you the diameter (or radius) to use to get a diameter of
> "d" measured face-to-face.
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