Create and Modify Surfaces: AutoCAD 2013


Uploaded by Autodesk on 27.03.2012

Transcript:
In this video, I’ll create this pitcher using a few surface modeling commands.
I’ll start with these objects to create the body, spout, and handle for the model.
I’ll be using the 3D Modeling workspace with the Realistic visual style.
First I’ll select Revolve from the Surface tab and revolve this spline around the centerline
360 degrees. I’ll hold the Shift key and the mouse wheel button while moving the mouse
to orbit around the model. When creating 3D models you’ll find that you zoom, pan, and
orbit around your model a lot. So far so good. Now I’ll extrude this circle into the body
of the pitcher. This solid will be used to trim the surface and form the cutout for the
pour spout. From the Solid tab, I’ll select Presspull. Notice the circle highlight as
I hover. AutoCAD has detected the circle as a closed object. I’ll click and drag to
create the cylinder for the spout. I want the cylinder to go into the body but not through
the bottom. Next, I’ll subtract the spout from the body
to trim the surface. This task dialog informs me that using a solid and a surface together
in some cases is not an ideal action. In this case, I am using the solid as a throwaway
object, so I click to continue the subtraction. I’ll create the spout using the LOFT command
to create a loft surface between the edge of the trimmed surface and the spline for
the top of the spout. From the Surface tab, I’ll select Loft. Holding the Ctrl key allows
me to select the trimmed edge of the surface. Now I’ll select the top edge of the spout,
and press Enter to create the surface, and Enter again to accept the defaults.
Next I’ll use Sweep to create the handle of the pitcher. First I’ll select this object
for the profile of the handle and press Enter, then the path I want the profile to follow.
With the handle created, our pitcher is really starting to take shape.
I’ll use Trim to trim the handle flush with the body of the pitcher. I’ll select the
handle for the surface I want to trim and press Enter, then the body of the pitcher
for the cutting edge and press Enter. Now I'll select the piece of the handle inside
pitcher to trim. Our pitcher is really looking good, but we
need to patch the hole in the bottom. I’ll use Patch and select the edge of the pitcher
and press Enter to create the bottom, and press Enter again to accept the defaults for
the patch. I’d like to create a base on the bottom
of the pitcher so it stands off the table. I’ll offset the patch to give the base a
little height. The arrows indicate the direction of the offset. If needed, I can use the Flip
option to change the direction. I’ll enter .75 for the offset distance and press Enter.
Now I’ll blend the bottom of the pitcher with the body. I’ll start by deleting the
original base surface, as it’s no longer needed. I’ll select Blend from the Surface
tab, and select the edge of the bottom surface as the first edge and press Enter, then the
edge of the pitcher as the second edge and press Enter. Now I’ll use the continuity
grip to adjust the continuity and the bulge magnitude of the surface. This will adjust
how the two surfaces blend together. For continuity I’ll select G1 for the first
edge and G2 for the second edge. Next I’ll select Bulge Magnitude and type 3 for the
first edge and 1 for the second edge. This will give the base a nice taper.
With using just a few surface commands, I was able to create this nice-looking model
of a pitcher.