ฝึกพูดภาษาอังกฤษด้วยเทคนิค Shadowing จากวิดีโอ: Using Selection & Scan Processing tools for reverse engineering | Geomagic Design X

So for today's webinar, we are going to work on another consumer product.

We're on a roll here with the consumer product, so why not just continue on with the applications?

So today's application is very simplistic, but what I am going to do is focus on some of the selection tools.

So we'll cover those and how to go about doing it.

so we're going to take these skills with design x to

make lives better as you can see here with this screenshot um

and use them to make consumer products manufacturing consumer products better

so we'll go over a little bit about how to use the selection tools

and scan processing tools to get to where we can auto surface this command here on this jacuzzi

so with that we'll go ahead

and jump over to the next slide talking about design x and the workflow and then we'll dive in

the software today i know every week we go over this slide

so i will definitely try to make it brief here

but for anyone that's just joining us that hasn't been on one of the re lab webinars

this slide really just summarizes the workflow for designx and designx was invented to take

scan data from a variety of different sources as you can

see here handhelds arms structured light long -range scanners all these different types handle the heavy lifting of

that type of information which doesn't play well inside of CAD environments.

So we built a platform from the ground up that can take

that information alongside of the CAD tools in one platform to

extract CAD information to then send out the data wherever you want to go, whatever your favorite manufacturing technique is,

whatever one that pertains to what you're trying to do.

So that's the overall workflow workflow for design x

and now let's jump over into our presentation

so for today's webinar we'll go ahead and take this we'll follow the format of processing this into a single scan

so here we have individual scans here and we are going to process it into a single scan

then auto surface it and then from there i also have some

selection tool things

that i would like to cover just breaking down some of those tools as we go along the way

so that's the format for today's is

that we're not going to roll back we're going to do this live

so as you can see i have individual scans over here

on the left hand side The first thing we're going to do is come over to alignment between scan data,

global fine, and go ahead and apply only a small transform.

Use only the reliable data, and we will do the best fit on that.

And you'll see that it will tighten up the alignment there a little bit it.

So now that we have them aligned to each other, as you can see, they look pretty good there.

We will go ahead and do a merge.

So we'll come over to polygons, merge, and let's try HD mesh.

I'm just going to try HD mesh first on this one, just to see how it goes.

since we're doing it live go ahead and run it and see where we where we stand with this

all right so we finished we'll go ahead

and uh we can actually just take those scans

and say move to new group and turn those off and yeah we got a pretty good pretty good merge there.

Let's go ahead and double check.

So right now we have it at 10 million triangles.

We really don't need 10 million triangles for this, so I'm going to drop it down.

Drop it down to like 1 .5. and run the decimate.

Remember the decimate command, we updated it in recent versions, so it's pretty fast now.

So now you see that we decimated it down.

And typically I also will sometimes run what we call a global remesh here.

So run global remesh to just kind of remesh and smooth it out a little bit as we go.

so there we go that looks beautiful now

alright so some of the things I wanted to talk about are some of the selection tools

and we'll go ahead and delete

that group there since we no longer need it on hand

and we can always go ahead

and save it will just say jacuzzi mold 02 this is just good housekeeping go ahead

and save this since we got rid of all that

so you have your selection tools up here right

so you have a line selector one thing that's nice about

line selector by the way is you know i can use it chop areas off

but sometimes if I want to chop this area here you see here

that it has a certain thickness to it well I can hold alt

and click and drag a wider line and I can come

and draw a wider line there if I hold alt

so there's one little tip here like let's say I'm disconnecting this

and I just come down

and use this line tool now i mean there's other ways of doing this

but what i'm doing is showing you sometimes

when you use certain tools there are just some really neat clutch uh aspects to a certain tool

that is just comes in really handy

so really what i'm saying there with the line tool is it just really handy for

if i'm just trying to disconnect something i might come

and do something along those lines like

that where i just use the line tool and again you can hold this alt

and change the thickness of it and you could just come down there like that

and use the line tool

so that's handy rectangle that's the default everybody kind of knows right um circle rarely use it

but kind of nice i guess you know in the right

instance um polygon i i use polygon a lot like i

all i was just talking about using the line right

so polygon i can just do something like this and select long straight areas

really handy there

and of course everybody loves everybody loves the lasso that's what

a lot of people end up using the majority of the time besides rectangle obviously

and you'll notice the one of the most popular techniques to

um using lasso is using the straight side of the lasso right

so if i just click there come over here and come over here and snap a straight line

um so using the straight line of the lasso is really handy there now custom region

we've covered this i believe in here before

but custom region is really neat it's like i'm going to

draw the borders of the country here i'm going to draw the borders all the way around

and then it will select everything inside of it

and it will have this preview until you hit okay

and select and then this is when combined with d feature is really handy right

because then you can just come in and hit d feature

and it will d feature an area

so this custom region tool it's really helpful for just sometimes

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there's an area like there's twisted triangles inside of it

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and you're not sure where those triangles go so

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if you just come over to custom region

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and you go around it double click for the last accept it and then d feature

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so the custom and then when it's done you'll notice

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that it toggles back to whatever else you were using first

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and of course the paintbrush is actually nice as well too

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so paintbrush is just really handy sometimes for stuff like this you just come in

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and you paint it you hold alt to change the size as well

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and then you can come into something like a d feature

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and d feature an area i also like paintbrush almost like

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you use it inside of like adobe products where i will just touch touch touch touch if you're doing photo cleanup

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and find uh deleting artifacts so then i come over to d feature

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and you'll notice there that d feature will work on multiple areas at once

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so i almost use the paintbrush a lot like i do Um, again, like if you're using Lightroom or Photoshop,

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you can, uh, just touch a bunch of different defects at all at the same time.

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And of course, paint bucket, amazing.

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I select the main object, uh, inverse, delete.

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So now I only have one shell on screen, one polygon object here.

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And that is, that is one of the best out there.

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Extend to similar.

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extended similar will just try to select large low curvature areas i use this a lot for creating regions right

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so i'll use that but this is very close to these other two

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and i'll say that i i honestly just jumped to uh the final smart selector um

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and it select um the second one here select by angle built into the software there is an angle

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if you go into the preferences

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so if you come over to file uh preferences

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and then scroll down here crease angle degree

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and you can set it's set for three millimeters right now

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so because that is set already at three degrees i tend to not use

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that one as much i tend to come over to the smart selector where i click

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and drag up and what that is ultimately doing when i do

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that is um adjusting that value right on the fly

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and then i can hit insert and create a region

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that way so i tend to use this one the majority of the time

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that is really just the best one honestly especially

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if the performance as well like

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if this is a not a massive uh triangle count then this responds really well you see how fast

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that is to flood out and

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if ever you have interior triangles like this what you can

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do is you can hit insert switch over to rectangle selector click on it you can enlarge it

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and then shrink it and that will kind of like flood in the interior triangles

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that are not selected so the same thing goes up here

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if i click this if i click on the region

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and i say enlarge and you'll see it fills in

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and then shrink right back to it just basically does a row of triangles at a time

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and it will it will automatically clear out those islands that's like one way of doing it

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is creating that sort of method there so these are the default selection tools

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but how many of you know there are more selection tools why not more

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so custom region you see here in here you have um all kinds of different options here

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but if we come over to mode

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and you see the ones that we already talked about

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and then you see some lesser used ones now this is

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just helpful maybe this is something you want to do maybe this is pointless here

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but you have box selection mode

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so box selection i'm just going to align to this view ish there we go

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and then if i click and then drag like so there i created a selection

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so it's like a volume selecting mode here and it stays in here by the way so i'm going to

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click and get out of it and let's go back in here

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so we'll come back over to select mode box let's get out of it let's just go to this one

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and then toggle back over to it select mode box Yeah,

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it's a real fun one.

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Honestly, I would prefer if it just exited when you're done.

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Right?

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So let's go over here to mode again.

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Cylinder.

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So I'm going to make a circle.

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Then I'm going to click where I want it to start and click where I want it to end.

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So we'll do that again.

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one more time there we go circle

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selector cylinder sorry not circles sphere

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if that's not good enough for you let's do this it's fear is interesting

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because you can like drag it around there

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and select the sphere I I would imagine on this data set everybody's like why are you doing this

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but i think if you have like a really elaborate scan it's got lots of internal geometry

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and all kinds of crazy stuff

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that this might end up being handy to select stuff

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and you see it stays in there by the way unless you hit escape to get out of it

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so that's what i just did if i come over to mode there it is

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so those are some of those selection tools now

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inside of the select you have another often overlooked area by criteria

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so this criteria tool is interesting you can say I want

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to select the max edge length smaller than one millimeter let's just do

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that and we'll hide the regions

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so select by criteria let's

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come over to polygons just toggle this off to select

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There we go. By criteria.

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Larger than.

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I honestly use that for long -range data, by the way.

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If I just say I want to select larger than one millimeter.

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So it's like, oh, all of it is larger than one millimeter, right?

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Right now.

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um and i could mess fiddle with it

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and try to find out like where it's at

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if i hit this look it's gonna give me like a general 30 um

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so let's just change it to 29 i think it should still

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okay didn't now if we come over to select by criteria you see here that we have other things

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area smaller than what that's really useful for a lot of times honestly is

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if I have disconnected you know I use the flood fill

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and inverse but sometimes it's really handy if I have just use the line there select

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criteria area smaller than 50.

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Okay.

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Larger than you see max midge edge length ratio larger than angle deviation from the plane

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um so if you have a plane you could say i want to select from angle deviation from that plane

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crease angle is larger than

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let's go that's with that there

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so all of those criteria just to give you a rundown

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of that's select by criteria you it's just really handy there

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and those are options that you have so I just wanted to make people aware that those are available for you

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and they're really helpful if you have an instance where you're just trying to figure something out

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now i'll go ahead and fill that hole and then let's go ahead

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and save this because i wanted to show the exterior faces option as well

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because you do have an option here to say

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select exterior faces and it will go around and select everything that's on the outside

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So let's go ahead and save this real quick.

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And we'll come back to it in a second because this one doesn't really have, as you can see, it's a zero thickness surface.

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It doesn't have an option.

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You know, it's not a good model for saying I want to select exterior surfaces.

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But if I come over and I just drop in a scan here that I have handy, we can do that as well here.

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So just a second.

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So here we have a hand.

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And if I come over to view clip,

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you see here it's like a shelled hand now honestly for

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this specific model all you would have to do is go back to one of our other selection tools

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that we have and select the interior that's kind of freaky

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and select that and just hit delete

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but I'm just gonna use this as an example to show the exterior tool

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so we'll just come over to view we'll just turn it back off here

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and come over to select just because I'm trying to use what we got here

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and select the exterior now now if I have that select exterior

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and I just hit cut and paste it as a new piece

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so there is the interior offset that again kind of creepy

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and then there's the exterior so

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that whole select exterior faces is just awesome it's just really handy

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so we'll go ahead and jump back to our other model so if i just drag that back in

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now we have this this model and we'll just kind of use some techniques

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that we were talking about before sometimes

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if i want to disconnect this outer wall you know some people do it this way they'll come through

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and they'll just kind of draw with selection tools like that

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or you can change the size of it here too and kind of paint that way

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another method is like we were talking about with the line tool and disconnect it that way holding shift.

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Another method is using the lasso.

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Not custom region.

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I accidentally did that.

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That's a very common thing that some people do.

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Right?

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So I can come in that way.

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Disconnect it that way.

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i think a lot of people would like to use that method

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using the polygon selector tool we got one more area to disconnect it

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so i'll just stick with polygon here on this one

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and then double click there and then you see here

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that we have that external area disconnected

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so we'll just switch back to rectangle you know flood never mind inverse delete

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and before we do anything else just run um healing wizard on it

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and you see there that we just run healing wizard just to fix any areas that may have issues

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you could always you know if this is still a little bit too

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rough you know you can come over and and run like something along the lines of enhance shape

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you know computer enhance you know you just tell it computer enhance and it will do it

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optimize mesh these are some of the different possibilities you can run

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so you see that did pretty good turn the regions off

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And and we're not focused on this today more what I wanted to focus on out of the selection tools

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So from here also, this is bothering me

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So let's just come over here and use the smart brush one more time here and enhance Enhance enhance and accept that

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Now we will come over to the most exciting part where we auto surface and

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and let it run oh

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so it's telling us to run the healing wizard one last time

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because i made changes to it and probably caused a few little tweaks there

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so now i have that i can come over to exact surfacing hit okay and we now will auto surface

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so there is our auto surface

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turn the mesh off and we can just come over

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and export that as a step file i just sat any of those neutral formats

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and again today's was more about talking about the selection tools

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and mesh processing and things like that

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because we do focus a lot on the modeling techniques

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but sometimes we want to make sure we focus on the the mesh tools as well

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so with that hopefully that was valuable for everybody we'll jump back over to our powerpoint

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i hope everyone has been enjoying the re lab webinar

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and i'm always striving to make it better and gather input from a variety of sources.

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And I had the idea to create a survey and put out a survey just asking for feedback.

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Mainly the feedback is just to gather data points on the topics,

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the applications, and if there are any other ideas of applications

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that people might like us to focus on

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and just kind of get the pulse of what you guys like to see what you like to hear

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so this is a very open form it asks for some feedback

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and suggestions and we'll go through those and implement those so

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if you have any proposed topics or things

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that you might want to learn about designx then go ahead

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and scan this qr code it takes you straight to a form and we will take that and implement it.

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