Mini-challenge

jeff hammond

@gilles said:

I think I've found a very easy way.
Show you later, no time yet.

sweet!

.

thomthom

Would be interesting to hear what the SketchUp team thinks of this challenge. ..too bad they are rather busy atm...

pilou

SUspense!

@unknownuser said:

actually, the second method in the video shows something that might make a good ruby.. 2pt orient with 1D scaling

And the same can make as option also Uniform or Stretch & Copy for the same price (Moi's function Line-Line)

TIG

My True Tangent's 'True Intersection' tool uses Ruby's float and Math's functions, so it's probably as accurate as Sketchup itself in its calculated answers.
Sketchup has to have tolerance to assume two points are 'equal' because most likely they'll have some tiny differences in the 'zillionths'.
Any computational answer will never be entirely accurate - just accurate enough.
Because we are using sine/cos/tan/roots/pi etc we cannot expect a 'perfect' result.

The calculated solution should be as accurate as needed to get a 'non-rounded' dimension at the limit of Sketchup's reporting.
Unfortunately the drawn solution's accuracy is slightly worse than Sketchup's reporting limit and so can show a tiny difference - the fact you can't even 'see' this in the real world is annoying.
With my rotation of the ends method gives a good approximation in one go, repeating it gets even nearer, and it might get so near that Sketchup then says it's 300.000000mm rather than 299.999999mm but it's a wasted effort in 'reality'.

gilles

Here we go!

Mini-challenge3_v6.skp

pilou

Thx for the V6
Must study your center rotation method because Step 4 is some tricky

FOr another method
I have thinking of use the offset for don't use rotation

TIG

Bravo Gilles !

At last a drawn solution [without plugins] that does indeed work with no tolerance issues !
Your very clever trick is getting the rotated 'end' to align with the 'long side' of its 'sibling' during the edit, it is effectively snapping to itself so the alignment is perfect... then both of the sides are parallel and the two ends remain the exact set dimension.

thomthom

I can't make it snap to the endpoint when I rotate...
?

TIG

You don't need to snap to a point, click on the originally horizontal guide line, then it suggests an inference 'parallel to edge outside active', when you are approximately over the long edge in the sibling instance [as the ends are approximating to 'square'], click to accept that.

EDIT: As Pilou shows in his screenshot - pipped at the post!