WEBVTT

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>> This is a short
lecture on some

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of the advanced solid
features of AutoCAD

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that are covered in lab 17.

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Ok we can start with
changing some

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of the solid modeling
display variables in AutoCAD,

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for instance things
like ISOLINES.

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I want you to play around
changing those values

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and see the effect
on the display

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in wireframe representation.

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A 3D model can be represented,
you've seen the visualization

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or visualize them to use
different representation

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such as wireframe, hidden
and meshed representation.

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Also things like realistic,
conceptual and the way

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that those representations are
done, especially in wireframe,

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are controlled by
these parameters here.

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Another thing that
you're going to be doing

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in AutoCAD is capable of finding
some properties that are related

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to solid by simply typing
the MASSPROP command

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or you can also access
it using the menu bar.

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MASSPROP will allow
you to find the mass,

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the volume of a given solid,
the volume of the bounding box,

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based on all we mentioned,
the Centroid.

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The Centroid of solid is really
the average representation,

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average position of the volume.

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It is the density uniform.

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The Centroid is also the same
location in the center of mass

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or central of gravity
of the solid.

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Moments of inertia, you learn
things like this in Physics,

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it's a measure of how the mass
is distributed with respect

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to the X, Y, Z and it's a
measure of how difficult

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or the resistance of an object

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as to rotation about
those access.

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You will also learn
products of inertia

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in your upper division
engineering courses.

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Radii of Gyration is useful in
computing moments of inertia.

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The good thing is AutoCAD,

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that's always this computation
automatically and simply

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by typing MASSPROP command

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and selecting your solid
it will give you this,

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a summary of this
solid properties.

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Another thing that you're going
to be using, another feature

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that you're going to be using

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in this lab is REVOLVE,
the REVOLVE command.

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It can be used to
create a 3D object

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by revolving a 2D shape
about a given access.

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And you can use a
specified angle.

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The object can also be
revolved about a line,

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polyline or specified points.

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Similar to EXTRUDE,
REVOLVE is useful

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in transforming 2 dimensional
objects into 3D objects.

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And the 2D shape
that can be revolved

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as to either be a
polyline, polygon,

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circle, ellipse or a spline.

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Or a region so you neither
transform your entities

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into single region
or a single polygon

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and I will illustrate that.

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Finally the last part of
this lab has something to do

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with creating 2 dimensional
drawings that is most ideals

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through 3D models automatically.

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And AutoCAD has a selection
of ways of doing that.

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We're going to talk about
the MVSETUP command,

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which is for creating
multiviews for wireframe models.

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Since it's a wireframe model
and disability is not accurate,

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the resulting multi-results
also do not show the

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correct facility.

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That is a result of hidden lines
in the line and the object.

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For actual 3D solid models
we're going to use the SOLVIEW,

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SOLDRAW combination in order

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to create multiviews
for the solid object.

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Here's a summary of the
steps for the MVSETUP.

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It can be for any
three type of models,

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wireframe, surface and solid.

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So it's most useful
for Wireframe

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but unfortunately it does not
give you the correct visibility.

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The steps are shown
here and I will go

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through a short demonstration
later on to create the order

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to use your MVSETUP
command to create Multiview.

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So it automatically creates from
3D, Wireframe or a surface model

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or a solid model, any kind
combination of multiviews.

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Finally we're going to be
using SOLVIEW and SOLDRAW

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in combination to create
Multiview drawings from solids.

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So this is the command that
we prefer if you're working

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with solids because it gives
us the correct visibility.

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And the steps are shown
here and I'm going to go

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through each of these steps.

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The important thing to do is
before you start your SOLVIEW,

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SOLDRAW you want to make sure

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that the hidden linetype
is loaded.

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Because, as I said, AutoCAD
will determine the visibility

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of the lines.

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As you will see, it will
create different layers

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and AutoCAD will determine
the disabilities of the lines.

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As you will see it will create
different layers for each

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of the views and for each views
it will also have different

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layers for hidden lines
as well as object lines.

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I will illustrate
all the steps here.

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So the actual lab
instruction has four parts.

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The first part is
a very simple solid

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of revolution using
this profile here.

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And you turn this into a
region and then revolve it

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to turn it into a 3D object.

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And then the last
part of this part

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of the lab gives you
an opportunity to play

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with different types of
materials and apply it

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to your solvent and then
render it to see the effect

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on the appearance of the
object, with assigned property.

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So I want you to
explore materials

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and apply materials
to your solid.

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The second part is creating
your own solid of revolution.

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So part 2, Lab 17b is I
want you to be creative.

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Create a solid of
revolution of your own.

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Please do not do something
that's simple,

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simple.

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And then render it and
you save it as lab 17b.

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And the last part has two
parts in it, taking a lab17a

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that you created previously and
doing a Multiview using SOLVIEW,

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SOLDRAW combination to view
the front, right and top views.

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And then the second
part is lab 16b.

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Repeat the same process,
however you don't do the front,

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right and top.

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You will be doing
the top front views

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and an auxiliary view
showing the two sides

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of the inclined plane.

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This is an illustration of
the first part of the lab.

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I've created this profile
here on the frontal plane.

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Make sure that your ACS and
your views on the front.

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And I've turned it into a
region, by the way it's easier

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if you have your workspace
in 3D modeling, now I'm going

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to switch to solid isometrics
so I can see the object,

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solid object develops.

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And I'm going to revolve this
region, so select the region,

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enter and then the access
would be aligned passing

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to the end point of this.

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The other end will be the
end point of this line.

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And then angle is
360, press enter.

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Next thing I'm going to go
to visualize and then play

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around with different
materials by clicking

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on the materials browser.

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This will open up this
materials library here.

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So here's a list of materials,
you can simply drag the swatch

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of any material you want
and drag it into the solid.

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And then you can look at the
affect by clicking on render.

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This will create
a rendered version

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of your solid using the
material that you've selected.

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Let's try that again, so there's
again a list of materials here.

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Just select different types of
materials, say this one here

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and drag the swatch into your
model and then click on render

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to see the rendered version.

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So you can also edit the
properties or the settings

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of any material that
you've used by clicking

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on the pencil there to edit.

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And I want you to play with
the different parameters

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that you see and see the
effects of these parameters

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on the resulting rendered
version of your object.

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You can also create your own
materials and set the color,

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the texture and all
the properties yourself

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and you can assign a
name to it as well.

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Now we're going to use the
command MASSPROP in order

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to display the mass
properties of the solid.

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So select the object,
click this, press enter

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and AutoCAD displays the mass
properties such as the mass,

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volume bonding box, the volume
of the bonding box, centroid,

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moments of inertia,
products of inertia.

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All of those

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properties that are associated
with solids and masses.

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And you'll learn in
this courses later how

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to compute them yourself for
a given object, 3D object.

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Next thing I'm going to
illustrate the MVSETUP command

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which is used to
create multiviews

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from a wide frame model,
or solid model, but this,

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it doesn't show the correct
facility being applicable

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for wireframe.

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First thing you want to do
is go to layout 1 and then

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if there's an existing
view purchase, erase that.

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And then type the command
MVSETUP, press enter.

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And then click on create,
then create viewports

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and then we will select
standard engineering 2,

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which is the front tip
right in isometric.

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It's asked for the
location of the viewport

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so just make a window that's
inside the dash boundaries

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of the paper.

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And then distance, let's
just say they're adjacent

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to each other at 00.

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And then it, viola,
creates the view.

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As you can see the scales are
not correct so click on scales

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and click on the
three views, the top,

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front and right view viewports.

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And then press enter.

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And then say U for uniform
scale and then just say 1 to 1.

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Now you see that the views
are of the same scale

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and they're now aligned
perfectly.

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The top, front and right
side view, we're not going

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to be using this for the lab

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because this is only
for wireframe.

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And take note the disability