how is programmed in autocad the tangent line function to a circle

[eugenio_78]

Good morning,
I have a curiosity, not a problem:
when I do the command line in autocad and in the drawing I have, for example a circle already drawn, if I approach the circle with the snap tangent and select it, start to show me the preview of a tangent line to the circle that fits correctly moving the mouse, if I click on any point draws a line from the tangency to the circle at that point.
My curiosity is this: How does the program create the preview of the tangent line as I move with the mause?
I don't think it's a very simple thing, this must, at every point where the cursor is located, calculate the tangent over the circle and show its preview, but how do they do?
Thank you.

 

[stefanobruno]

so bbravi !

 

[sircame]

Good morning,
I have a curiosity, not a problem:
when I do the command line in autocad and in the drawing I have, for example a circle already drawn, if I approach the circle with the snap tangent and select it, start to show me the preview of a tangent line to the circle that fits correctly moving the mouse, if I click on any point draws a line from the tangency to the circle at that point.
My curiosity is this: How does the program create the preview of the tangent line as I move with the mause?
I don't think it's a very simple thing, this must, at every point where the cursor is located, calculate the tangent over the circle and show its preview, but how do they do?
Thank you.

they went on the moon thanks to a commodore that had a processor clock of about 1mhz.
think what a quad core can do with 3.4ghz.

He just thinks that in call of duty for every bullet exploded his casing reflects the outside environment. . .
what you want for a processor of the last 10 years to calculate the tangent in realtime. . .

 

[eugenio_78]

all you say is true, my curiosity wanted to be a little more 'underground'.
I'm curious to know what method they use to do. It is a very special thing and of no importance for one of the 'commun' users of autocad like us, but it is something that has always fascinated me very much.
I use autocad from version 12, and after all these years I'm still in love with it. We are now surrounded by all those solid modelers who do 1000 things, but there is a feature that has always had autocad: its stability !!!
I don't know how to explain it, it's been programmed by God, since 1996 I've been working with this program and I can remind you all the times that it's been planted all these years because they have been very rare.
Since I started using solid modelers, I'm used to forget the times they plant because it happens every week.
I would so much like to spend 15 minutes with one of the managers of programming and maintenance of autocad, so to speak more and less, to ask him one specific question: how did you do that so?

 

[Tristan]

We are now surrounded by all those solid modelers who do 1000 things, but there is a feature that has always had autocad: its stability !!!
I don't know how to explain it, it's been programmed by God, since 1996 I've been working with this program and I can remind you all the times that it's been planted all these years because they have been very rare.
Since I started using solid modelers, I'm used to forget the times they plant because it happens every week.
I would so much like to spend 15 minutes with one of the managers of programming and maintenance of autocad, so to speak more and less, to ask him one specific question: how did you do that so?

but please us!!! :
I use autocad also from the r12 dos and the latest versions are anything but stable. if you want, I send you a thunder for the creation of an ionic capital; do it with autocad 2008 and try to do it again with autocad 2010 and later and then we talk about it.
autocad is an exceptional digital tecnigraph, nothing more. for the 3d better look elsewhere.. .

 

[stefanobruno]

autocad failure 2004 and try to do it again with autocad 2010 and later. . .

as the madamin simonaventura said: "I love you tristan "

the game is to force you to change, not to increase potential but to insurmountable incompatibility.

for the 3d better look elsewhere.. .

if one is accustomed to making 3d with autocad, struggling to enter the real modeling mode.
If you don't have someone who accompanies you in the first hours of learning, you're bewildered.
After you understand, you won't come back, I miss to draw a washer.

 

[Tristan]

Unfortunately autocad 2004 did not have the sweep and loft controls, for this I mentioned 2008... let's say, autocad for the 3d was never a product to consider. when with autocad it was played to the lego, rhinoceros already allowed to model footwear and boats to a fifth of the cost! Of course it is that if my work was mainly 2d with autocad lt I had enough

 

[sircame]

all you say is true, my curiosity wanted to be a little more 'underground'.
I'm curious to know what method they use to do. It is a very special thing and of no importance for one of the 'commun' users of autocad like us, but it is something that has always fascinated me very much.
I use autocad from version 12, and after all these years I'm still in love with it. We are now surrounded by all those solid modelers who do 1000 things, but there is a feature that has always had autocad: its stability !!!
I don't know how to explain it, it's been programmed by God, since 1996 I've been working with this program and I can remind you all the times that it's been planted all these years because they have been very rare.
Since I started using solid modelers, I'm used to forget the times they plant because it happens every week.
I would so much like to spend 15 minutes with one of the managers of programming and maintenance of autocad, so to speak more and less, to ask him one specific question: how did you do that so?

No, well, I don't agree. .
the cad, the autocad is great for the 2d, also there are also in 2014 still unresolved bugs, but regarding the 3d... even sketchup is more userfrieldly. . .

to make a concrete pile with a section of a viaduct in autocad my colleague (work with the cad for 15 years) took the whole day... I at lunch had already the ready model in sketcup and I was making the render, and in the meantime that I made the render modeled with solidworks even if it was not its specific field, but in times however lower.
if they put some features of the full in thelt no one would buy the full version anymore, because so much the lt would be the top in circulation regarding the 2d drawings.

for the 2d there is cad! for the 3d any other program is more performing. . .

 

[eugenio_78]

the discussion moved quickly to 3d. probably everyone needs a 3d.
What's the 3d for?
I think using autocad for the 3d is a not very comfortable solution. I use autocad only for 2d drawings.
in 90% of my work use solidworks, I do mechanical design.
perhaps the forum ti autocad is populated by many giometers that fail to sell their projects if they are not accompanied by a nice rendering.
for me autocad serves to draw in 2d (is there any problem if I use it only for that? )

I thought you could chat on a simple small topic, draw a tangent line to a circle.
Have you ever tried to draw a tangent line to a circle with a program that is not autocad?

 

[sircame]

But in fact... autocad is the top regarding the 2d. I disoegno especially viaducts, underpasses, road planning, and in the studio we all have the autocad lt, except a full for any particular operations. We don't need other programs.

but when they ask us maybe a little render for how the struttua will come out... do it in autocad there is to put your hands on the hair. . .

in any way everything that offers the carcad for 2d drawings I think is unparalleled! Indeed, as far as I am concerned, it is better than archicad and revit put together (obviously for what is my work).

autocad allows you to solve many problems related to elementary geometry, which seem trivial, but are not.
the function that you put, that is the tangency, I use it every day drawing in scale the armor of piles, shoulders and suns of bridges!
same thing when it comes to particular constructions maybe in scale at 5 or 2. bho... In my opinion the autocad is unparalleled!
It's like using the pencil while drawing (I always make a pencil pattern) just that you have a precision of 10 digits after the comma...

 

[Tristan]

the discussion moved quickly to 3d. probably everyone needs a 3d.
What's the 3d for?

If you haven't figured it out, it changes your trade. . .

 

[Tristan]

It's like using the pencil while drawing (I always make a pencil pattern) just that you have a 10 digit accuracy after the comma.. .

is certainly not the most important advantage. . .when molds you still have a 0.2mm graphical error so even at the executive detail scales would suffice 4 or 5...ah, actually there are many more than 10 values after the comma

 

[sircame]

is certainly not the most important advantage. . .when molds you still have a 0.2mm graphical error so even at the executive detail scales would suffice 4 or 5...ah, actually there are many more than 10 values after the comma

Yes, already printing in line thickness you lose something, but I mean in the naked and raw design the cad is the most accurate tool I know, precise and all under control, with the concrete you put 2 digits after the comma, with the steel you put 4... the cad goes even far beyond, but for what is the field of instrumental type bridges, underpasses, viability and so I would say that there are no software they hold. . .

But what you're saying is another subject for me. It's true that the card does faith, but it's also true that the perfect design benefits you.
then it's all about evaluating who the printed table is. if it goes in metal carpentry for welding in workshop is an account, if it goes in common for a preliminary it is another.. .
for my experience is better a perfect dwg in measurements and details than a design with some modified quota... Then the mistakes come out the same.
I am what draws in scale both the thickness of the iron and the angle of curvature, as well as the various diameters and the various overlaps.
it may be useless, but when you go to make the explosion of the needles you have already beautiful that ready, both in view and for the computation...

unless to be lazy like my former colleague who claims that a 10m long line, if mirrored is not exactly 10 meters, but can be 10,00000000000000001 or 9.9999999999999999999999. (I have never verified it, a theory of his own). .

 

[eugenio_78]

If you haven't figured it out, it changes your trade. . .

thank you for the advice!!! I will consider

I left hoping to chat about a tangent line to a circle and we have come to discuss my professional future.

Do you have any sentimental advice? or kitchen?