21/04/2020 - Extrude and Loft

In the 21st of April class we learned:

-Types of Extrude:

• Normal - Perpendicular to the plan we want to extrude;
• Direction - follows the direction of a line;
• Path - follows the path of a line;
• Angle - follows the inclination of an angle;

- Command Region;

- Command Edgesurf;

- How to give thickness to a surface;

- Command Loft.

First, we did some surfaces and solids using the command Extrude.

The first one was a normal Extrude, where the extension is created perpendicularly to the plan.

The second one follows the direction of a line, defined by 2 points, even if the plan is oblique. 

The third one follows the path of a line, whatever direction it is, if it's curved, straight, oblique...

The last one follows the inclination of a certain angle, that we give.

Then, we learned that we can Extrude not only surfaces, but also lines, like a half circunference.

And how to Subtract parts of some of the extrusions using others.

Giving them different thickness and shapes.

Now, using two equal shapes, we saw that we can´t Subtract two overlapping shapes.

Unless we use first the command Region.

After the Extrude, we learnt how to create different types of surfaces.

By drawing a square and linking 4 points with different heights with lines we created a curved surface, using the command Edgesurf and selecting those 4 lines.

What if we want to give it some thickness?

We can use the command Thicken, select the surface, and give the thickness we wish.

And it also works with other surfaces.

Then, we used the command Loft to create some other curved shapes with all the directions and paths we wish.

We only have to create the shapes we want to use and give them different heights.

And we can also create sections of those surfaces.

And take the tops out.

And create surfaces composed by more than 1 surface, using Boolean Operations like Subtract.