 Hey, what's up folks welcome back to another layer by layer in today's video We're gonna take a look at how to make symmetrical splines in fusion 360 So I'm working on this new project and the shape of this They really needed to make it so that I can adjust one side and the other side would get updated as well That's called symmetry so you can actually use these symmetry sketch constraint to create Symmetrical shapes that where you move one piece the other piece moves I really haven't needed to do that and using the spine tool adds that extra complexity of having bezian curves and handles that can also be symmetrical and Really the secret here is how to combine the symmetrical and the equal sketch constraint So I'm gonna create a new document and they kind of work around this shape here So I'll create a new component and then let's go ahead and make a sketch on this floor plane Okay, maybe not the floor plane this plane then the front plane. Why not? All right So the first thing I wanted to do was to let me show you this the kind of the idea here is to grab this spline tool and let's kind of create a Rectangle right so we need four points and I'll just kind of use the the grid to kind of create a Rectangle and when you do a loop it ends up looking like this, right? So it looks like a Circle right so these little green handles we can start to move them You see as like a decrease the the the length of it it creates a much smaller Curve which is what we want So if we wanted to create this shape where we want to have like this really bubbly type of bet like a bit of a Bezzle for a screen. Let's say you see I have to kind of do this four times and it's really difficult to To gauge how big they need to be So what I found is that you can use the sketch dimension tool to actually apply a sketch dimension To the length of the handle which is going to be important now You notice that when I the orientation of your sketch dimension really depends on What what the orientation is so here it's two and then this way it's actually 2.8 So I wanted to go this way because that's like the real length of the of those two points And that way I can have a fixed number here. So I'm just going to put three, right? That's cool. So what we can do is we can say we can use the symmetrical tool constraint right here To define symmetry But really what we need to do first is to apply an equal So basically with the equal we can we can define that I want This line to be equal with another line, right? So I can do that now So I'll select both of these hold down the shift the shift key and then I'll click on equal and they both get equalized there So now if I click on this you'll notice that the length down here is set to three and hey This is also three. So if I change this to four, this would also change to four, right? Yeah, and you can see that now there is an issue is that they're not symmetrical yet, right? They're equal But they aren't Symmetrical there's a big difference there equal in the length but different in the position So how do we kind of define the position? Well, we need a third line to define the symmetry, right? We need a bit of a line a construction line doesn't have to be construction I'd a line really that defines that this is in the middle now normally what I would do with the shape like this is I would I would find the mid the middle of the of the shape But you notice that this is a curve and you really can't find the midpoint of a curve It's not the way it works So what I found is let's create a rectangle and then use that rectangle to Define the corners for our curvy shape here. So here's what I'll do grab the rectangle tool I'm just gonna draw a rectangle and Let's define some things. So let's say it is going to be 25 By 30 Okay, that looks good. Now the next thing I want to do is I want to create some midpoint constraint lines So if I roll over the top of this line, you'll see that little that little triangle That tells me that that's gonna be in the middle and it kind of snaps to it too So I got that line. I clicked it and then the next line. I want to roll over the left side the left line and Then I can find the midpoint constraint or the midpoint of that. So click on that. Oops and did that wrong Let me undo that. Let's do it again line tool Roll over find the midpoint to this line roll over here find the midpoint But don't click yet. If you just start to move your your your cursor Fusion will will kind of start to guide you and it kind of locks you down there and then until I hit This straight up and down. This is a perpendicular constraint. That's being created at the top here So that's what I want and then as I go down here, bam There's the middle so click there and then I'll finish this off by clicking right there And that gives us like three different constraints that are automatic to just the placement of it So we have a midpoint constraint here midpoint constraint here And then these two lines are connected right here in the corner with a coincident. So that's awesome So now watch what happens. I can grab this one dot this one point and move this whole thing around. That's awesome So I'm gonna do is I'm gonna grab that and then place it right in the center and that kind of locks it in there So now what I need to do is I need to double click on that rectangle hit the X key That'll make it into a construction line same thing with these two lines double click it Should select both of the lines hit X and then now we have a midpoint constraint so now what we need to do is we need to Apply these corners these dots these points to the corners of our Construction rectangle our construction line rectangle and instead of drag, of course, we can drag it like this Right, that's fine But instead of doing that why don't we do it kind of the easier way Which I find is to use the coincident constraint that coincident is saying hey I want this dot to go to that dot. I want this dot to go to that dot now messing around and futzing around with dragging Points you can if you just know that the coincident point is going to put that there for you you can save yourself Your fingers Your wrist some time so there we go. We have we have We have coincidentally Constraint all of our points to the corners of this rectangle. So that's what we want now We can start to define some symmetry. So if I start to move this around, right? This is kind of going to be our main Current corner that we're going to apply to the other three corners. So this is the main one We're going to be working on okay, so as I'm moving that around, you notice that it's not really Changing the other side. So all we need to do now is to pull out this the symmetry Coincident or a constraint so I'll click on that and it wants you to pick Well, what's the kind of main one that you want to select? And that's our first one. So it's this corner And then what do you want the second corner to be? Well, it's this one right here, right? And now you have a third the third thing you need to click on is your line that defines the symmetry and Because our corners are kind of locked to a rectangle the mid the middle of these two is actually this line here That's going up and down. That's on the on the y-axis if we're looking at it straight on Or down straight down. So click on that and then bam There's their cemetery we've defined our cemetery and now we can test that by actually moving these corpse around the other side Is being affected. That's that's just symmetrical right there. That looks beautiful And we can step this even further and we can define an angle So we can say I want this line the spazzing curve to be a perfect angle across this this this line here So you can see that that is now a not a length but a degree an angle So I'm gonna put 45 because I have that perfect 45 degree now And if you look over here, this is also a perfect 45 degree because it's just symmetrical It just always will be and now we can define we can change this So if I want this to be bigger or smaller say like 2.5 the other side gets affected as well perfectly awesome I'm gonna set that back to 3 or what was it 4? I think it was 4 cool So now we have to do is do this same thing for these bottom corners You notice that these these bedding curves seem to have kind of disappeared Just click on it again, and they they come up right there cool, so again this right here has no Equal it needs to equal the length of this one. Okay, so that's what we'll do So pull out our sketch thing and type an equal or you can go to the top menu if you want to go all the way up there So equal I want to say that this line or this this handle is gonna be equal with our main handle up here and As I click that bam it changes its length perfect now We can use the symmetry. So let's go symmetry. I want this and This to be symmetrical But instead of using the line going up and down on our x-axe on our y-axis we want to go We want to go across we want to go horizontally. So that's this line here That's why we created two of these lines when to go up and down and when to go that way that way We can create symmetry vertically and horizontally right so I can click on that and then bam You can see that that is now symmetrical So as I I can't move it now because it's it's locked to that 45 degree But you can see there that all we need to do to change all of them is this one set of of of dimensions the length of our Curve of our of our handle for a busy incur and the angle of our curve of our handle And then of course you could change the width and height by using these guys here And we can apply some user parameters. We want to make a parametric which we'll do in a minute But we're still we're still messing with this one. I think this is the last corner that we need to do Right, you can see it's all it's all wanky. So again, we go here I want this and this to be Equal right they're equal now. I need to see symmetry. So you say this one actually Let's do this one and this one are symmetrical with not this one But this line going up on our y-axis and then bam and now we fully Symmetricalized the whole shape which is really great. So I'm going to bring up my user parameter window Let's call this the corner and this will be four millimeters and then I will do a width Let's say our width is 30 and our height is 25 So that way I can play with these so now this is going to be your height. This is our width This is our corner and Now we can play with it. So what I like to do is to Use the offset sketch to kind of get an offset here So maybe like three okay, and then I can extrude this out Let's say it's gonna be like three and okay, and now I have our kind of Shape here that we've created and this works. This makes a really nice shape For like a like a bubbly screen and that's really what I did here, right? It's like I did that same technique here for all of these shapes And it works out not just for like rectangles, but also these kind of weird bubbly shapes, right? So go back over here. Let's take a look at our user parameters Or one thing I like to do with the sketch right click on it and say show dimensions that way You can kind of update these things without having to dive back into the sketch So if I wanted to increase this offset changes to four it automatically updates, which is really great Yeah, so let me go into the user parameter window and then just kind of play around with it Let's say we want to go 40 See that all that changes. Let's do this 40 35 that changes it up nicely Let me drop this down to 3.5. You can see how that affects the bubbliness of it Let me make that 2 millimeter even more. So it's like a little bit more Extreme that's like almost going inward That's kind of bizarre. So let me go back out. I Think 3.5 is really nice. Yeah, that's cool. And Yeah, that's this is a great way a great technique To visually see like for if you were making a bezel for display You can see how this construction line could act as like the actual viewing area of your of your of your object And then you can you can better? Determine how much you want to reveal in your in your thing because in this case here If I can't quite do it because of just the nature of it being there But I wanted to show how this is actually covering up some of the screen. I can't quite show you that Maybe if I do If I do this Yeah, a little bit not really We go to the top Something like that. This is I really wish I could show you like the whole Maybe I can't know I can't like that but any manner This only reveals a little bit and it cuts off some of the corners in the screen This is one of the one of the caveats of doing this type of shape for for for a Display, but hey, it's a really cool one if you want to make like a like an old-school TV or something This is one of the ways you would be able to do it But I was really excited that to be able to finally use Cemetery and the equal sketch constraints is something I haven't really needed to do until now So that's why I figured I'd share it. It seems like a really simple thing, but I think combining the technique of having a fixed rectangle And then using symmetrical the symmetry and the equal sketch constraints It really makes this really Flexible scalable and it just reduces some of the friction that I have experienced with the spline tool Let me know what you think if you use the spline tool a lot and you found some weird quirkiness of this I hope this helps you out and You know, feel free to add some more comments and things to this video So it's so maybe I learned some more things, but hey, I hope you learned something and good luck and you're making your endeavors But until next time remember to make a great day. I'll see you folks in the next one. Bye