constructing a round using a circle with two tangential points
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Attach drawing files and screenshots.
Post one question per topic.
constructing a round using a circle with two tangential points
One point is the endpoint of the line. The other two points are the tangent points of the two lines against the circle.
(N.B. the radius isn't known beforehand and the tangent points aren't either as well).
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Christoph
Christoph
Re: constructing a round using a circle with two tangential points
Thomas
Last edited by TSG on Tue Sep 17, 2019 11:39 am, edited 1 time in total.
Ich will nicht streiten. Ich will nur deutlich machen, dass ich Recht habe und DU NICHT.
Re: constructing a round using a circle with two tangential points
You could draw a vertical construction line at the endpoint and use 3 tangent.
Re: constructing a round using a circle with two tangential points
Draw > Circle > 2 Tangents and Point:
https://qcad.org/doc/qcad/latest/refere ... /Circle2TP
https://qcad.org/doc/qcad/latest/refere ... /Circle2TP
Re: constructing a round using a circle with two tangential points
This doesn't seem to work. I'm asked for first line or circle, second line or circle and when being asked for "point on circle line" it doesn't snap at the endpoint.andrew wrote: ↑Tue Sep 17, 2019 12:39 pmDraw > Circle > 2 Tangents and Point:
https://qcad.org/doc/qcad/latest/refere ... /Circle2TP
@CVH: 3 Tangent works.
Thanks
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Christoph
Christoph
Re: constructing a round using a circle with two tangential points
The CT2 tool is built to solve the task easily without auxiliary lines.
Try this click order:
If it still not snap to the endpoint doublecheck your Auto Snap settings. End Points should be checked:
Work smart, not hard: QCad Pro
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."
Re: constructing a round using a circle with two tangential points
Sorry, but when your point is at the bissectrice there is no solution....
And that should be the easiest one, one only!
Last edited by CVH on Mon Sep 30, 2019 8:46 am, edited 2 times in total.
Re: constructing a round using a circle with two tangential points
I agree. In this case with QCAD 3.23.0.0 and macOS Mojave the tool ct2 doesn't work.
When snapping to the endpoint or any other point on the line all solutions disappear.
I think it's a bug.
Thomas
When snapping to the endpoint or any other point on the line all solutions disappear.
I think it's a bug.
Thomas
Ich will nicht streiten. Ich will nur deutlich machen, dass ich Recht habe und DU NICHT.
Re: constructing a round using a circle with two tangential points
Interesting!
Guys - please do me a favor: After you mentioned it doesn't works (and it was flawless working for me!) I tested a bit and discovert something interesting. I won't tell you now the result ....
This dxf has two identical situation. Please test on each on them what I posted as solution for this task and tell me how it works for you. Thanks.
Guys - please do me a favor: After you mentioned it doesn't works (and it was flawless working for me!) I tested a bit and discovert something interesting. I won't tell you now the result ....
This dxf has two identical situation. Please test on each on them what I posted as solution for this task and tell me how it works for you. Thanks.
Work smart, not hard: QCad Pro
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."
Re: constructing a round using a circle with two tangential points
#1 doesn't still work (no solution)
#2 works as expected (found 2 solutions)
Couldn't found any difference between the situations.
What's the reason for that?
Thomas
Ich will nicht streiten. Ich will nur deutlich machen, dass ich Recht habe und DU NICHT.
Re: constructing a round using a circle with two tangential points
macOS mojave 10.14.6
Qcad 3.23.0.0
Invoking ct2 on example 1. results in the solution circles disappearing when selecting the endpoint (3.)
Doing the same on example 2. results in showing the two circles for choice end lets choose the desired solution circle:
Qcad 3.23.0.0
Invoking ct2 on example 1. results in the solution circles disappearing when selecting the endpoint (3.)
Doing the same on example 2. results in showing the two circles for choice end lets choose the desired solution circle:
--
Christoph
Christoph
Re: constructing a round using a circle with two tangential points
It's getting warmer...
When moving #1 down CT2 works.
Thomas
When moving #1 down CT2 works.
Thomas
Ich will nicht streiten. Ich will nur deutlich machen, dass ich Recht habe und DU NICHT.
Re: constructing a round using a circle with two tangential points
Thanks for testing!
CT2 behaves differently simply based on where it is used. Thomas, you expected already a bug - will you file a bug report?
Both situation are exactly the same (copy). Difference is only the location.
CT2 behaves differently simply based on where it is used. Thomas, you expected already a bug - will you file a bug report?
Work smart, not hard: QCad Pro
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."
Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."
Re: constructing a round using a circle with two tangential points
Flaw depends on order reference line selection and selection place.
Flaw never 1 unique on bissectrice.
Flaw regions 0 instead of 2, 1 instead of 2 (drew quick and dirty).
Regions not strickt. Very tiny diffs may comply or not.
Regards,
CVH
Flaw never 1 unique on bissectrice.
Flaw regions 0 instead of 2, 1 instead of 2 (drew quick and dirty).
Regions not strickt. Very tiny diffs may comply or not.
Regards,
CVH
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