Mini-challenge
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@unknownuser said:
@unknownuser said:
When testing I recommend you put the posts further apart as with near square shape deviances might be so small that you think you have a correct solution.
I don't understand why you don't receive my test?
All seems perfect!
Where is the glitch ? (I am in decimal with maximum precision alowed by SU )[attachment=0:1h4o0r1i]<!-- ia0 -->test_jeff.jpg<!-- ia0 -->[/attachment:1h4o0r1i]
I think presenting the problem in 3D could of been confusing. the direction youre measuring 5 in this latest image is insignificant.. try drawing the 2D version (posted on pg 2 or so)
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Aaaaaaaaaaaaahhhhh
Call me Fredo!
I was suffering from hallucinations! 
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I just avoid to test the height result!
A sort of rotating geometric mirage!
2.670000 against 2.470811m -
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@tig said:
@gaieus said:
@unknownuser said:
i'm not quite sure they could give us true arcs in sketchup without entirely changing the way sketchup works.. (how would a cylinder be drawn if there were no segments in the arcs? a nurbs surface? )
I do nor care for any "real" geometry. Let it me an approximated, segemented surface model.
What should be here is circular guides. To let us do geometry we learnt in secondary/high school at our teen ages... That's not much but fairly enough.
My Tangent Tools fill the gap [for now] and allow you to find the real intersection points of tangents to arcs, lines and arcs, arcs and arcs etc etc...
They are not new
yeah, true tangents seems to be the only viable ruby solution at this time.
is it possible to make it more interactive? to where it basically acts like the standard rotate tool but it will snap to an arbitrary point along a line segment? or is something like that impossible to code with the current API?
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@gilles said:
I'm back!
and I'm back on my phone now
can't wait to see what you've come up with this time.(in 2 more hours or so)
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@gilles said:
I'm back!
I realized this is not strictly geometrically correct. The line that you are putting the guide perpendicular to will not be at the same angle once it is adjusted to the correct width. There is a slight shift that occurs once you adjust both ends.
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Thx for the V6 ! The figure remember something N
I will try another idea come back...in...a week...or months...
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@tig said:
Mac1
How do you get the rotated guide pt to snap exactly onto the horizontal top guideline ?
The guide point and the guide lines are rotated ( their 3.5 spacing is used to get the intersect point on the post A bottom. The post B top is used for the snap ref. Have to do that since you cannot inference to guide lines. The error can occur on the other end when trying to get the guide point on the line. If you what more accuracy one could use the technique Jeane uses for interpolation to come close to the intersect point when rotating one line into another.
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Yeah, that's essentially the same thing I did, but the reason I didn't make a circle is the circle geometry is too imprecise to work accurately in every scenario.
I'll check out TIGs latest when I get to the studio.
Best,
Jason. -
This is the simplest non-plugin way I can think of - it's much less hassle than my last attempt...
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@dave r said:
That stuck with me, too. I can't remember who I took to prom, though.
Your wife will be pleased to read this. -
Looks like use of a centerline to start is not a good idea?
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@tig said:
This is the simplest non-plugin way I can think of - it's much less hassle than my last attempt...
That's what gilles came up with.
http://forums.sketchucation.com/viewtopic.php?f=15&t=44972&start=90#p401988however, there's a slight shift in the angle of the long side, so technically, it's not precisely tangent to the 300mm circle that would be drawn at the start point.
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Another tricky Tig method with always fantasy of temp crutches
In theory the more elegant is the rotation method : one circle / one rotation
It's like this that nurbs programms do -
SU does not manage angles under 0.001° in rotation, another frustrating inaccuracy.
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Gilles and TIG,
This method is not precise. I've added a "true tangent" to where the corner of the board should be, and if you zoom way in, you can see there is an imprecision there.
if you zoom in to the corner, you can see how it doesn't exactly match the true tangent.
Andy
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