>> This is a short lecture on some
of the advanced solid features of AutoCAD
that are covered in lab 17.
Ok we can start with changing some
of the solid modeling display variables in AutoCAD,
for instance things like ISOLINES.
I want you to play around changing those values
and see the effect on the display
in wireframe representation.
A 3D model can be represented, you've seen the visualization
or visualize them to use different representation
such as wireframe, hidden and meshed representation.
Also things like realistic, conceptual and the way
that those representations are done, especially in wireframe,
are controlled by these parameters here.
Another thing that you're going to be doing
in AutoCAD is capable of finding some properties that are related
to solid by simply typing the MASSPROP command
or you can also access it using the menu bar.
MASSPROP will allow you to find the mass,
the volume of a given solid, the volume of the bounding box,
based on all we mentioned, the Centroid.
The Centroid of solid is really the average representation,
average position of the volume.
It is the density uniform.
The Centroid is also the same location in the center of mass
or central of gravity of the solid.
Moments of inertia, you learn things like this in Physics,
it's a measure of how the mass is distributed with respect
to the X, Y, Z and it's a measure of how difficult
or the resistance of an object
as to rotation about those access.
You will also learn products of inertia
in your upper division engineering courses.
Radii of Gyration is useful in computing moments of inertia.
The good thing is AutoCAD,
that's always this computation automatically and simply
by typing MASSPROP command
and selecting your solid it will give you this,
a summary of this solid properties.
Another thing that you're going to be using, another feature
that you're going to be using
in this lab is REVOLVE, the REVOLVE command.
It can be used to create a 3D object
by revolving a 2D shape about a given access.
And you can use a specified angle.
The object can also be revolved about a line,
polyline or specified points.
Similar to EXTRUDE, REVOLVE is useful
in transforming 2 dimensional objects into 3D objects.
And the 2D shape that can be revolved
as to either be a polyline, polygon,
circle, ellipse or a spline.
Or a region so you neither transform your entities
into single region or a single polygon
and I will illustrate that.
Finally the last part of this lab has something to do
with creating 2 dimensional drawings that is most ideals
through 3D models automatically.
And AutoCAD has a selection of ways of doing that.
We're going to talk about the MVSETUP command,
which is for creating multiviews for wireframe models.
Since it's a wireframe model and disability is not accurate,
the resulting multi-results also do not show the
correct facility.
That is a result of hidden lines in the line and the object.
For actual 3D solid models we're going to use the SOLVIEW,
SOLDRAW combination in order
to create multiviews for the solid object.
Here's a summary of the steps for the MVSETUP.
It can be for any three type of models,
wireframe, surface and solid.
So it's most useful for Wireframe
but unfortunately it does not give you the correct visibility.
The steps are shown here and I will go
through a short demonstration later on to create the order
to use your MVSETUP command to create Multiview.
So it automatically creates from 3D, Wireframe or a surface model
or a solid model, any kind combination of multiviews.
Finally we're going to be using SOLVIEW and SOLDRAW
in combination to create Multiview drawings from solids.
So this is the command that we prefer if you're working
with solids because it gives us the correct visibility.
And the steps are shown here and I'm going to go
through each of these steps.
The important thing to do is before you start your SOLVIEW,
SOLDRAW you want to make sure
that the hidden linetype is loaded.
Because, as I said, AutoCAD will determine the visibility
of the lines.
As you will see, it will create different layers
and AutoCAD will determine the disabilities of the lines.
As you will see it will create different layers for each
of the views and for each views it will also have different
layers for hidden lines as well as object lines.
I will illustrate all the steps here.
So the actual lab instruction has four parts.
The first part is a very simple solid
of revolution using this profile here.
And you turn this into a region and then revolve it
to turn it into a 3D object.
And then the last part of this part
of the lab gives you an opportunity to play
with different types of materials and apply it
to your solvent and then render it to see the effect
on the appearance of the object, with assigned property.
So I want you to explore materials
and apply materials to your solid.
The second part is creating your own solid of revolution.
So part 2, Lab 17b is I want you to be creative.
Create a solid of revolution of your own.
Please do not do something that's simple,
simple.
And then render it and you save it as lab 17b.
And the last part has two parts in it, taking a lab17a
that you created previously and doing a Multiview using SOLVIEW,
SOLDRAW combination to view the front, right and top views.
And then the second part is lab 16b.
Repeat the same process, however you don't do the front,
right and top.
You will be doing the top front views
and an auxiliary view showing the two sides
of the inclined plane.
This is an illustration of the first part of the lab.
I've created this profile here on the frontal plane.
Make sure that your ACS and your views on the front.
And I've turned it into a region, by the way it's easier
if you have your workspace in 3D modeling, now I'm going
to switch to solid isometrics so I can see the object,
solid object develops.
And I'm going to revolve this region, so select the region,
enter and then the access would be aligned passing
to the end point of this.
The other end will be the end point of this line.
And then angle is 360, press enter.
Next thing I'm going to go to visualize and then play
around with different materials by clicking
on the materials browser.
This will open up this materials library here.
So here's a list of materials, you can simply drag the swatch
of any material you want and drag it into the solid.
And then you can look at the affect by clicking on render.
This will create a rendered version
of your solid using the material that you've selected.
Let's try that again, so there's again a list of materials here.
Just select different types of materials, say this one here
and drag the swatch into your model and then click on render
to see the rendered version.
So you can also edit the properties or the settings
of any material that you've used by clicking
on the pencil there to edit.
And I want you to play with the different parameters
that you see and see the effects of these parameters
on the resulting rendered version of your object.
You can also create your own materials and set the color,
the texture and all the properties yourself
and you can assign a name to it as well.
Now we're going to use the command MASSPROP in order
to display the mass properties of the solid.
So select the object, click this, press enter
and AutoCAD displays the mass properties such as the mass,
volume bonding box, the volume of the bonding box, centroid,
moments of inertia, products of inertia.
All of those
properties that are associated with solids and masses.
And you'll learn in this courses later how
to compute them yourself for a given object, 3D object.
Next thing I'm going to illustrate the MVSETUP command
which is used to create multiviews
from a wide frame model, or solid model, but this,
it doesn't show the correct facility being applicable
for wireframe.
First thing you want to do is go to layout 1 and then
if there's an existing view purchase, erase that.
And then type the command MVSETUP, press enter.
And then click on create, then create viewports
and then we will select standard engineering 2,
which is the front tip right in isometric.
It's asked for the location of the viewport
so just make a window that's inside the dash boundaries
of the paper.
And then distance, let's just say they're adjacent
to each other at 00.
And then it, viola, creates the view.
As you can see the scales are not correct so click on scales
and click on the three views, the top,
front and right view viewports.
And then press enter.
And then say U for uniform scale and then just say 1 to 1.
Now you see that the views are of the same scale
and they're now aligned perfectly.
The top, front and right side view, we're not going
to be using this for the lab
because this is only for wireframe.
And take note the disability