spline and control points

[catapulta00]

Hello everyone
someone knows how to tell me why it doesn't give me the chance to use the control point change command as it happens in this video ( http://www.youtube.com/watch?v=rrze...xt=c3bd1e7cudoegstopdskltpjattejisekfs8lhczyo ) where there are also tangency constraints.
Maybe there's some sorting I don't know?

 

[maxopus]

Why do you have the "locked" quota restrictions?

 

[catapulta00]

no the odds are not blocked, but you saw the video minute about 3.20, he has everything bound but quietly pugest the points of control instead if I put only one tangency bond already I can no longer click the option; For all

on an English forum I had read about that some versions of pro/e allow it while others do not; to me it seems a minked but remains the fact that I can not unlock that option

 

[zimmy]

You're right.
with the wf3 you can (as in the video) . with the wf5 no! and not with creo!
I tried to see in the options in the config but I found nothing that can rehabilitate that kind of control on two-point spline.
but you could come with a trick.
three-point spline, without tangency, activates the control range and then imposes the tangences of the polygon, then eliminate the intermediate point.

I try to describe it as soon as possible. next time.

 

[zimmy]

Try that.
Before making the connection spline, try to make two tangent segments to the two side splines previously made. segments make them construction.
then the spline for the two extreme points.
change spline.
activate the control range. Okay.
therefore in skecth makes parallel initial tangent segments and the two extreme sides of the control range.

 

[zimmy]

catapult
I've been looking for a solution to your request.
I don't know if I'm satisfied with your needs but be happy with your answer because you ask many questions about curves and surfaces .
This is also how we actively participate in discussions and collaborate in the success and growth of the forum.
and if my answer doesn't have to be what you expected... just say it!

 

[catapulta00]

Sorry zimmy, really feel excuses are savaged a rude; However, you are great because you have found a solution, and you have also clarified that there are versions in which this is possible, and this will remain one of the mysteries of pro/e as I have studied the configuration options but I have not been able to find anything regurdo until now.

Sorry

 

[Fulvio Romano]

I don't know if I'm satisfied with your needs but be happy with your answer because you ask many questions about curves and surfaces .
This is also how we actively participate in discussions and collaborate in the success and growth of the forum.
and if my answer doesn't have to be what you expected... just say it!

Sorry zimmy, really feel excuses are savaged a rude;

Capers. I don't even have my wife screaming like this if I don't call her for a whole day... she spent a week...:biggrin:

 

[maxopus]

You touch a nerve.
I don't know if this is the case, but there are too many people who use the forum to learn how to use the programs without making any contributions.
as zimmy is one of the most experienced people ever on the use of ptc solutions and it has been for many years that it contributes to giving very important information ... every now and then it is legible to say its.
I also used cad3d instead of doing so many courses (I made them but 80% of knowledge I acquired it differently) and I try to make a contribution to return the many courtesans received.

 

[Parametric_Ozzy]

quoto...
I have learned to select some people here on the forum, there are those who deserve an answer and there are those who do not, I certainly don't eat the liver for people anymore.

greetings

 

[Fulvio Romano]

Yes, okay, I just said that catapult00 did not respond for a handful of hours, and it is the case that he knows that some "rude" response is due to the nerves discovered, more than to his behavior in this thread.

 

[zimmy]

If I disturbed someone, I apologize. in the cracked texts sends the tone and gaze of the eperson!

I do not participate very much in the forum but, when I can, I say mine ( thanks maxopus ... too good! ).

At the end of my sentence there was a smile.

to answer this question I spent some time, I did some tests, I attached pictures ...

I am happy to ask questions (and I am happy because he is a young man and he is appreciable for his interest and his desire to learn!) , he asked other questions (class areas a) and intervened several times during the day at this discussion without sending me an answer to the other question.
I think he didn't have to do it for courtesy ( catapult, you don't have to apologize ... all right!! ) but only to share all those who read the forum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

with this spirit you contribute to the forum.

My answer certainly didn't want to be "rude"... for those who know me... it's not exactly in my style

ps : my small answer here can also be useful to understand what is said in the discussion about the surfaces in class a . from the attached images you can understand the knots, the polygons, the continuity .... In any case, if we put more knots on the spline polygon and if we align more knots, what do you say? and here we could say a lot ... also because I see that there is a lot of confusion about these arguments ... (g3? is continuity in twist ... and then c2 is not the same thing as g2 ... so as to be lazy!

never!

 

[catapulta00]

And quiet guys, let's put a cross on it, zimmy's right at least you have to answer.

As for the g2 and g3 continuous curves, I am informing myself where I can but more read and less understand. For example I read that for a g3 continuity it needs 7 control vertices, but manually checking a 7-point curve seems boring and a little crazy.

 

[maxopus]

It's like that.
the higher the degree of continuity, the higher the degree of connected surfaces.
If you want a g3 continuity means that the first 3 knots of adjacent surfaces are blocked and you cannot manipulate them.
if an internal surface is connected to two adjacent surfaces with continuity g3 has 6 knots blocked.
I repeat to you from my experience (and people far more experienced than me) the continuity of this kind is useless.
if the surfaces you build are simple (3x3 or maximum 4x4) and connect them properly. and roundings follow the right rules with a g2 continuity you will always manage even in the most ostic sectors.
Keep in control the quality of a 3x3 surface is simple, and when you carry it you will never have problems.
to make an 8x8 surface means to go to meet the stakes:
1) because when you start manipulating the knots quality goes to be blessed if you are not a magician;
2) because when you take it out, who opens it with a cad or a "old style" cam takes you behind many of those beasts that half enough to shine you ... I saw people who in the caia do surfaces also of grade 15 and then when you open the iges are all disconnected and shot in hyperspace.

 

[Fulvio Romano]

I repeat to you from my experience (and people far more experienced than me) the continuity of this kind is useless.

That's right.
a "beautiful" surface (read: "class a") certainly cannot have breaks, but the continuity of tangence alone is more than good.

I personally use continuity of curvature (and never more so) only for the lines that see the water (beam boats), and the water can notice discontinuity that the eye does not see.