2012
Table Of Contents
- Contents
- Get Information
- The User Interface
- Start and Save Drawings
- Control the Drawing Views
- Organize Drawings and Layouts
- Create and Modify Objects
- Control the Properties of Objects
- Use Precision Tools
- Work with the User Coordinate System (UCS)
- Enter Coordinates to Specify Points
- Use Dynamic Input
- Snap to Locations on Objects (Object Snaps)
- Restrict Cursor Movement
- Combine or Offset Points and Coordinates
- Specify Distances
- Extract Geometric Information from Objects
- Use a Calculator
- Create Objects
- Select and Modify Objects
- Select Objects
- Correct Mistakes
- Erase Objects
- Cut, Copy, and Paste with the Clipboard
- Modify Objects
- Add Constraints to Geometry
- Define and Reference Blocks
- Work with 3D Models
- Create 3D Models
- Overview of 3D Modeling
- Create Solids and Surfaces from Lines and Curves
- Create Solids
- Create Surfaces
- Create Meshes
- Create Wireframe Models
- Add 3D Thickness to Objects
- Modify 3D Models
- Create Sections and Drawings from 3D Models
- Create 3D Models
- Annotate Drawings
- Work with Annotations
- Overview of Annotations
- Scale Annotations
- Overview of Scaling Annotations
- Set Annotation Scale
- Create Annotative Objects
- Display Annotative Objects
- Add and Modify Scale Representations
- Set Orientation for Annotations
- Hatches, Fills, and Wipeouts
- Notes and Labels
- Tables
- Dimensions and Tolerances
- Understand Basic Concepts of Dimensioning
- Use Dimension Styles
- Set the Scale for Dimensions
- Create Dimensions
- Modify Existing Dimensions
- Add Geometric Tolerances
- Work with Annotations
- Plot and Publish Drawings
- Specify Settings for Plotting
- Save Plot Settings as Named Page Setups
- Reuse Named Page Setups
- Specify Page Setup Settings
- Select a Printer or Plotter for a Layout
- Select a Paper Size for a Layout
- Determine the Drawing Orientation of a Layout
- Set the Plot Area of a Layout
- Adjust the Plot Offset of a Layout
- Set the Plot Scale for a Layout
- Set the Lineweight Scale for a Layout
- Select a Plot Style Table for a Layout
- Set Shaded Viewport and Plot Options for a Layout
- Print or Plot Drawings
- Overview of Plotting
- Use a Page Setup to Specify Plot Settings
- Select a Printer or Plotter
- Specify the Area to Plot
- Set Paper Size
- Position the Drawing on the Paper
- Control How Objects Are Plotted
- Preview a Plot
- Plot Files to Other Formats
- Publish Drawings
- Specify Settings for Plotting
- Share Data Between Files
- Reference Other Drawing Files
- Work with Data in Other Formats
- Collaborate with Others
- Render Drawings
- Draw 2D Isometric Views
- Add Lighting to Your Model
- Materials and Textures
- Render 3D Objects for Realism
- Glossary
- Index
Clamp Surfaces and Curves with Open and Closed Geometry
NURBS surfaces and curves can have a clamp, closed, or open form. The form
affects how the object deforms.
Open Curves and surfaces - have their start and end CVs in different
positions - it doesn’t form a loop. If you snap the start and end CVs of an
open curve to the same position, it’s still an open curve, because you can
still drag these points away from one another.
Closed Curves and Surfaces - a loop with coinciding start and end CVs.
Where they meet is called a seam. If you move one CV, the other moves
with it.
Clamp Curve - is a closed loop with a seam that creates extra, unseen
CVs. These unseen CVs can cause the shape to wrinkle and crease when
it is reshaped.
See also:
Draw Splines (page 209)
Modify Splines (page 281)
Create Associative Surfaces
Associative surfaces automatically adjust to changes made to other, related
objects.
When surface associativity is on, surfaces are created with a relationship to
the surface or profiles that created them.
Associativity allows you to:
Reshape the generating profiles to automatically reshape the surface.
Work with a group of surfaces as if they were one object. Just as reshaping
one face of a solid box adjusts the entire primitive, reshaping one surface
or edge in a group of associated surfaces adjusts the entire group.
Use geometric constraints on the 2D profiles of a surface.
Assign mathematical expressions to derive properties of surfaces, such as
height and radius. For example, specify that the height of an extruded
surface be equal to one half the length of another object.
As you add more objects and edit them, all these objects become related and
create a chain of dependency. Editing one object can ripple through and affect
all associated objects.
Create 3D Models | 405