AutoCAD 2011 Free Trial

System Requirements

• Microsoft® Windows® 7 Enterprise, Ultimate, Professional, or Home Premium (compare Windows 7 versions)
• Microsoft® Windows Vista® Enterprise, Business, Ultimate, or Home Premium (SP1 or later) (compare Windows Vista versions)
• Microsoft® Windows® XP Professional or Home edition (SP2 or later)

For Windows Vista or Windows 7:
Intel® Pentium® 4 or AMD Athlon® dual-core processor, 3.0 GHz or higher with SSE2 technology
For Windows XP:
Intel Pentium 4 or AMD Athlon dual-core processor, 1.6 GHz or higher with SSE2 technology
2 GB RAM
1.8 GB free disk space for installation
1,024 x 768 display resolution with true color
Microsoft® Internet Explorer® 7.0 or late

Materials

Materials Browser
Browse and search for materials from the Autodesk Materials Library of thousands of materials and user libraries, as well as from the current drawing

A list of the available libraries and their categories is available in the tree at the bottom left of the Materials Browser

Create Own Library
Create and open your own materials libraries directly in the Materials Browser

Create categories within the materials library to organize and manage specific types of materials
Can search on material characteristics, such as blue or ceramic
Add it to the current drawing via the Right-click menu or drag and drop
Materials in the current drawing are displayed in the upper pane of the Materials Browser

Material Editor

Lower-right corner of Material panel or

Lower-right of Material Browser

Offers many settings to modify properties of a material

Mesh Edit

Merge Face

Merge two or more adjacent faces into a single face

Close Hole

Close gaps in mesh objects by selecting the edges of the surrounding mesh edges

Collapse Face

Force vertices of surrounding mesh faces to converge at the center of a selected edge or face

Spin Triangle Face

Modifies the shapes of faces by rotating the edge that joins two triangular mesh faces

Analysis Tools

Help to understand the continuity between different surfaces that make up a global shape


Zebra

Analyze surface continuity by projecting parallel lines onto the surface

Curvature

Displays a color gradient on the surface, enabling you to identify high and low areas of curvature

Draft Angle

Displays a color gradient on the surface, enabling to determine if a model has adequate draft between a part and its mold

Convert to NURBS

Surface tab - Control Vertices panel - Convert to NURBS

Convert from analytic 分解的 surfaces to NURBS surfaces

Show / Hide CV

Show CV and use the gizmo to move the control vertices, reshaping the surface

Additional tools enables to Rebuild, Add, Remove the control vertices

Project Geometry

Project geometry onto a surface creating a new line or spline on top of the surface

Unlike Imprint tool, the projected geometry is not consumed by the surface

AutoTrim

Surfaces are automatically trimmed when you project geometry

Surface Editing Tools

Fillet

Surface tab - Edit panel - Fillet

Create a fillet with a specified radius between two surface edges


Trim

Create complex edges and holes in surfaces
Can use the Untrim tool (UNTRIM command) to untrim a trimmed surface

Extend

Extend a surface by selecting an edge

Sculpt
Surface tab - Edit panel- Sculpt

Create a new solid object based on the enclosed volume of multiple intersecting surfaces

Offset Surface

Create a new surface by offsetting an existing surface

Surface Associativity

If surface associativity is enabled when create an offset surface and a blend between the two surfaces, all three surfaces are associative

If edit the offset distance, using the Properties palette or grips, the blend surface will update accordingly

Surface Modeling

2 different types of surfaces:

Procedural
Associative with history


NURBS (non‐uniform rational b‐spline)
Non-associative and without history

Control vertices that allow to sculpt 雕刻 shapes

Surface Creation Tools
Blend

Creates a smooth transition between existing surfaces

Patch

Close or “patch” an open, closed‐edge object

Generates a new patch surface for any bounding edge that is a closed loop

Network

Create a surface through a set of curves in the U and V directions
It is similar to the LOFT command but more streamlined and flexible
Can even choose a selection of curves that are not connected to one another
If the edges of a networked surface from existing surfaces, the newly created
surface will have additional grips

Solid Modeling

The EXTRUDE, LOFT, REVOLVE, and SWEEP commands now allow to select an edge or subobject as a profile or curve to create a new surface

No longer limited to using planar curves
The Solid ribbon tab provides access to new Fillet Edge and Chamfer Edge solid editing tools

Both of these tools provide a preview

3D Object Snap

A new 3D Object Snap toggle is available on the status bar

Right‐clicking on status bar icon provides access to a menu of the 3D object snaps and the Settings option

3D Workspace

Includes two 3D‐related workspaces

3D Basics

A simple workspace with the most basic tools for creating and visualizing 3D solid models


3D Modeling

Access to the complete array of 3D tools in AutoCAD

Dimensional Constraints - Parametric Constraints

Includes a new Convert option to convert associative dimensions to dimensional constraints

Edit In-place

Click on an existing dimensional constraint to insert the constraint name

When dynamic dimensional constraints reference another parameter, the parameter text is prepended 预置 with “fx:” to help prevent from accidentally assigning a constant value to a parameter that references other variables

Visibility

Show/Hide tool can select the specific dimensional constraints

Parameters Manager

  

Includes a new Filters pane where can define parameter groups that display a subset of the parameters

Geometric Constraint - Parametric Constraints

Object highlighting when roll over an icon on a constraint bar
Quickly display all constraint bars in their original position by Reset option


Geometric Constraints
Can infer 推断 geometric constraints as you create and modify geometry

A new Infer Constraint button on the status bar enables to toggle inferred constraints on and off

• Draw a circle by snapping its center to the midpoint of a line
• AutoCAD automatically applies a coincident constraint between the center of the circle and the midpoint of the line
• If the circle move, the line goes with it

• Copy the insertion of a block to the endpoint of a line
• AutoCAD automatically applies a coincident constraint between those two points
• When move the line, the block maintains its position at the endpoint of the line

Temporarily relax the constraint by Ctrl key


Ellipses and Text

Can now apply Parallel, Perpendicular, Collinear, Horizontal, and Vertical constraints between the major or minor axes of an ellipse and other objects

Apply Parallel, Perpendicular, Collinear, Horizontal, and Vertical constraints to the
rotation angle of text objects (Single Line & Multiline Text)

Geometric Constraint Settings

Show constraint bars when objects are selected even if those constraint bars are currently hidden

New Constraint Icon

Action Recorder

Delete or insert user messages for View Change operations

The macro list displays the most recently used macros above the separation bar and all available macros below it

Text Alignment in Linetypes

Maintain linetype readability in any orientation

The linetypes behave this way by default


OLD

*GAS_LINE,Gas line ----GAS----GAS----GAS----GAS----GAS----GAS--
A,.5,-.2,["GAS",STANDARD,S=.1,R=0.0,X=-0.1,Y=-.05],-.25

NEW

*GAS_LINE,Gas line ----GAS----GAS----GAS----GAS----GAS----GAS--
A,.5,-.2,["GAS",STANDARD,S=.1,U=0.0,X=-0.1,Y=-.05],-.25

Change the rotation option from R (Relative) to U (Upright) or A (Absolute)

Missing SHX & Font Files

Now have the option to ignore missing SHX files (shape or font files) when opening a drawing

Text styles with missing fonts are now identified by an icon in the Text Style Manager

Scale List

Can easily reset the scale list in the drawing to the default list of scales (metric or imperial) defined in the registry

Use the default scale list to define a customized list of scales that automatically displays in all your drawings