Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Analyzing surface continuity

From: AutoCAD 2011 New Features

Video: Analyzing surface continuity

In this lesson we're going to create the wheel cap for our wagon. After creating the part, we'll look at some of the new Surface Analysis tools that are available in AutoCAD 2011. On my screen I have some polyline geometry. I'm going to orbit my drawing a little bit, so you can see its context in 3D space. Generally speaking, I've drawn one half of the cross section of my wheel cap, and I've also drawn my axis of revolution. I would like to revolve this geometry around this axis. Before I do that, I'm going to move up and click the NURBS Creation toggle.

Analyzing surface continuity

In this lesson we're going to create the wheel cap for our wagon. After creating the part, we'll look at some of the new Surface Analysis tools that are available in AutoCAD 2011. On my screen I have some polyline geometry. I'm going to orbit my drawing a little bit, so you can see its context in 3D space. Generally speaking, I've drawn one half of the cross section of my wheel cap, and I've also drawn my axis of revolution. I would like to revolve this geometry around this axis. Before I do that, I'm going to move up and click the NURBS Creation toggle.

I want to turn that off, because I don't want to create a NURBS surface right now. Now that that's taken care of, I'll launch the Revolve command. I'll select my polyline and hit Enter. I will then select this endpoint and this endpoint to define my axis of revolution, and I'll enter a value of 360. Let's back up a little bit. As I orbit this around, we can see that that one revolution essentially finished my part. Let's center this on screen, and I'm going to turn off this section line work.

We don't need to see this any more. So I'm going to open up the Layer Properties Manager and we'll turn off this layer called Surface_Section. Let's take a look at the new Surface Analysis tools. We can find those in the Analysis panel of our ribbon. Now, mine happens to be creeping off the side of my screen. To make this a little bit easier to see, I'm going to click-and-hold on this panel name, and I'll drag this out in the model space and release. Surface Analysis is used to inspect our surfaces using gradient colors and patterns, such that we can easily identify things like curvature, continuity and draft angles.

We have three types of analysis that we can run, Zebra, Curvature and Draft. Let's look at Zebra first. I'll create my analysis by launching the command. I'll select my surface and I'll hit Enter. The Zebra analysis projects these parallel lines over the surface. These lines allow us to analyze the continuity or the transition between surfaces. The sharper the difference in the lines, the sharper the edges between surfaces. Let me also mention that these analysis tools only work when you're using a Visual Style.

They won't show up if you're viewing your geometry in wireframe. To turn off the analysis, I will relaunch the command, right-click, and select Turn off from the menu. Let's do a curvature analysis. To do that, I'll select Curvature from the panel. I'll select my surface and hit Enter. The curvature analysis displays a color gradient over the surface. The gradient shows us the high and low areas of curvature. The areas of maximum curvature will appear green, and areas that meet the definition of minimum curvature will appear blue.

Let's try a draft analysis. I'll click the Draft icon. I'll select my surface and hit Enter. Notice I didn't have to turn off the curvature analysis before I ran draft. Essentially, one will replace the other. The Draft analysis also displays a gradient over the surface. This tool is used to determine if a model has adequate draft between a part and its mold. The maximum draft angle will appear red, and the minimum draft angle appears blue.

To turn off the analysis, I'll click the Draft icon again. Right-click and select Turn off from the menu. I'm going to pan the drawing over a little bit to give myself some room. Let's look at some of the options that are available for each analysis type. I'll click Analysis Options from the panel. This brings up my Analysis Options dialog box. This dialog box contains three tabs, one for each analysis method. On the tab are settings I can use to adjust the appearance of the analysis.

Each tab also has a button that I can use to apply the analysis if necessary. I'm going to click this icon and then select my surface and hit Enter to apply the Zebra analysis. Now that it's active, I can use this slider to change my stripe direction. I can also adjust things like the type of stripe, the size and the color. Likewise, I can clear the analysis by clicking this button. Let's take a look at curvature. I'll click the icon, and we'll apply a curvature analysis again.

Under Color Mapping, I can change my Display style from Gaussian to Mean, to Maximum and Minimum radius. I'm going to set this back to Gaussian. The values that we see here control my maximum curvature value and my minimum curvature value. Right now, anything that meets this minimum curvature value will appear blue. That's why there's no blue showing up on my surface, because nothing meets that minimum curvature value. If I was to change this to something like 0.5, now we can see blue showing up on my model.

Let's clear the analysis and we'll take a look at draft angle. Once again, I'll apply this to my surface and hit Enter. Under Color Mapping, I have two settings. These control my maximum and minimum draft angle. As an example, I'm going to change my maximum angle to 1. Notice the change in the appearance, and that AutoCAD adjusted this central number to keep it halfway between the angle settings. Now that I'm finished, I'm going to clear my analysis and I'll click OK to close the dialog box. Finally, I'll hover over this panel and I'll click the icon in the upper right corner to return it to my ribbon.

Let's center this on screen. Since the part is finished, let's save it, so we can use it later in our final assembly. To save this drawing, I'll click the application menu and select Save As. We'll save this in the Exercise Files folder inside the Finished_Parts directory, and we'll call this wheelCap_finished, and I'll click Save. This completes the geometry for our final component, the wheel cap. In this lesson, we learned that AutoCAD allows us to analyze our surface models to identify surface continuity, curvature and draft angles.

The Analysis tools can be turned on and off whenever they're needed, and we can customize many of their settings.

Show transcript

This video is part of

Image for AutoCAD 2011 New Features
AutoCAD 2011 New Features

39 video lessons · 4089 viewers

Jeff Bartels
Author

 
Expand all | Collapse all
  1. 2m 4s
    1. Welcome
      1m 28s
    2. Using the exercise files
      36s
  2. 14m 2s
    1. Adapting to the updated Drawing window
      4m 4s
    2. Introducing the Navigation bar
      5m 28s
    3. Accessing the web-based help system
      4m 30s
  3. 27m 36s
    1. Understanding the new visibility controls
      3m 5s
    2. Selecting objects that have similar properties
      3m 24s
    3. Creating new geometry based on existing objects
      2m 20s
    4. Making selections when entities overlap
      4m 11s
    5. Applying transparency to objects
      5m 44s
    6. Controlling text alignment within linetypes
      8m 52s
  4. 16m 38s
    1. Automating the creation of geometric constraints
      5m 35s
    2. Applying constraints to text rotation
      3m 8s
    3. Using the updated Parameters Manager
      7m 55s
  5. 38m 40s
    1. Streamlining hatch creation
      5m 56s
    2. Editing hatch objects dynamically
      4m 36s
    3. Editing polylines using multifunctional grips
      6m 14s
    4. Creating splines using fit points or control vertices
      10m 30s
    5. Editing splines using intuitive grip menus
      8m 17s
    6. Using the JOIN command to connect contiguous geometry
      3m 7s
  6. 18m 56s
    1. Exploring the updated 3D working environment
      6m 50s
    2. Simplifying the creation and editing of solid models
      5m 59s
    3. Introducing new tools to edit mesh models
      6m 7s
  7. 1h 25m
    1. Introducing surfaces
      2m 50s
    2. Understanding associative surfaces
      7m 9s
    3. Creating composite models using surfaces and solids
      9m 3s
    4. Producing a smooth blend between surfaces
      7m 20s
    5. Trimming and extending surfaces
      10m 55s
    6. Projecting geometry onto a surface
      5m 29s
    7. Filleting the edge between two surfaces
      6m 37s
    8. Creating offset and network surfaces
      8m 45s
    9. Pushing and pulling surfaces into freeform shapes
      10m 52s
    10. Analyzing surface continuity
      6m 15s
    11. Assembling the composite model
      10m 40s
  8. 22m 2s
    1. Introducing the new Materials Browser
      6m 10s
    2. Applying materials to an assembly
      6m 2s
    3. Customizing render materials
      5m 17s
    4. Creating a high-resolution image
      4m 33s
  9. 16s
    1. Goodbye
      16s

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Join now "Already a member? Log in

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed AutoCAD 2011 New Features.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.