Welcome to today's session. In the last session, we learned about sketching and editing. So, today we learned about the constraint. And this is very important, because for any scale, you need to constrain it properly. So what is constraint means Let's learn. Let's start with the working directory first.

Okay, they start the new sketch. new kid. Do the name your schedule. Click ok. So now You're in the sketcher Come on. Okay, so we have learned already about sketching and editing.

Let's learn about the constraints. Okay, let's see how many types of constraint we have first is vertical. For example, any line, if you draw and it is not vertical, you can use this command to make it vertical, okay. Then the horizontal, this you can make the lines horizontal or next is perpendicular. So, for example, your two lines and you want them perpendicular to each other, you can use it or you have a circle and a line and you want your line to be perpendicular to that circle. You can use it for different examples you can use it the tangent constraint, same, in the second line, you want to be tangent to each other or two Cuz tangent to each other can make it a tangent command the midpoint, you can select the midpoint by using this or you can constrain a line in the midpoint of another line that way the next is coincide.

So this is to coincide two different entities. The next is symmetry to make the entity symmetric to each other is equal to make the two lines two circles are two rectangles, the two entities equal to each other. And this is a problem, for example, to make the two nice paddles, okay, so let's start. Start with the vertical one. To learn these I'll draw I'll draw a line Okay, this law He's not vertical and I wanted vertical. So, the best way is to use of constraint select the vertical constraint and then select the line it is what the constraints are shown here, this V is a constraint is a vertical constraint, clear make it vertical constraint is already selected same way or decentralized Will you take the constraints automatically and if it is not you can make it vertical or horizontal vertical constraint and select the line You know I want to make these lines horizontal Okay.

Then I make use of the constraint No, it is already I need to first delete that constraint. So, how to select the constraint you need to constrain no like this. So, this means sometimes how to play with that if it does not work for you it was vertical. That's why it was not making horizontal, just slanted with different angle This way, you can use a horizontal constraint. Okay? So to practice, and let's see the next one that is perpendicular, as I told before as well.

For example, I have two lines. These are not perpendicular to each other. You can see the angle between them is 49.8. And I want to make them perpendicular. For use perpendicular constraint. These two lines, know they're perpendicular.

Here's a symbol for perpendicular constraint. Here's another example this article I have another line here somewhere is not perpendicular to that circle. So, I use a perpendicular constraint select the circle and select the line. Now it is perpendicular perpendicular one and perpendicular to this we can use a constraint. Next constraint that is tangent two entities tangent and create a tangent constraint. For example, now, I just delete this line and make a line.

This is not know how to make a line tangent to the circle I can use a tangent constraint to select a tangent constraint. Select the circle, select the line. Now, this line is tangent to the circle draw another circle. Now this circle is not tangent to this line. So to make it tangent, what should I do? I should use a Kenyan constraint line.

This extension is not an on that line but if you extend the line this way, you can make use of tangent constraint is no two lines? No What is my requirement? My requirement is this point of one nine should be coincide with the midpoint of another line. So I want this line somewhere here at the midpoint, okay, but I'll just put it here. It is not at the midpoint. To find the exact midpoint, can use by the midpoint command, delete the midpoint, delete the endpoint of the line, select another line.

You know this endpoint of this line is at the midpoint of another line. Okay, this way they're using it Come on. No, let's see another screen. The next one is coincident coincident means, for example, I have two lines I want to Coins Coins on the other line can use a coincident simple liquid line not a coincidence I draw a circle I want this line coincident on this circle. So, I use a coincident constraint, coincident constraint point of line and select the circle is coincident. This way you can make coincident constraint The next thing is symmetry This is very much useful.

So, for the symmetry constraint, you always need a center line delete everything a draw center line draw line. Now, this line is not symmetric to the centerline. It is one this is Dimitri make it symmetric To make a symmetry link symmetric command link the endpoint of this line and the insulator centerline II know the symmetry I have a rectangle I want to make it symmetric symmetric on the endpoints. Now, I want to make this rectangle vertically symmetry. So, for that I need a horizontal line. Now, this rectangle is not vertically symmetry to make it symmetry symmetry come The two points in selected now is symmetry.

You can use a symmetric chord. Okay, so let's learn the next two constraints which are equal and parallel. So this is to make two entities equal. I draw two circles. So now you can see them are not equal. So to make them equal, select the equal constraint, select two circles.

They're equal in r1 and r1 it means they're equal. You can make use for the lines as well do lines How to make them equal equal constraint like these two lines are equal to one and one it means they are having the same length we can make them parallel students this way you can make use of constraint. So what are the constraint types? vertical, horizontal perpendicular midpoint and coincident asymmetry equal and parallel. So total there are nine constraints. Okay.

This might be the question when you're giving interview for the crew Many constraints in skater main constraint. Okay, so that's all for today's session. So, we learned sketching, editing and constraints. Next, we'll go ahead with the dimension spec. Okay. So that's all for today's session.

Thank you and have a nice day.