Understanding the Flattening Process in AutoCAD
Flattening in AutoCAD refers to the technique of converting 3D objects and drawings into a 2D representation. This is particularly useful for creating presentations and plots, as it simplifies models while retaining essential attributes.
Locating the Flatten Command
To begin the flattening process, users must first find the appropriate command within AutoCAD. This can be done through different methods:
Using the Tool Set: Navigate to the Drafting tab, then select Modify panel, and finally choose Flatten Objects.
- Menu Access: Alternatively, access it via the menu by selecting Modify and then clicking on Flatten Objects.
Step-by-Step Flattening of 3D Objects to 2D
To effectively flatten a 3D model into a 2D drawing, follow these steps:
Select the Objects: Click on the Modify Panel from the Home tab and then select Flatten. A prompt will appear for you to choose the 3D objects you want to flatten.
Confirm the Selection: After selecting the desired objects, press Enter to confirm your selection.
Choose the Plane: Specify the viewing plane where you wish to project your 3D objects. This could be the current UCS (User Coordinate System) or any other specified plane.
- Confirm Flattening: Once you set the viewing plane, the command will project your selected objects onto that plane, converting them into 2D representations.
The resulting 2D objects will retain their original layer properties, colors, and linetypes as much as possible.
Flattening in AutoCAD LT
If you’re working with AutoCAD LT, there is a manual method you can use:
Open the Properties Palette: Find the properties for Start Z, End Z, and Center Z.
Adjust Z Values: Change the values of Start Z and End Z to a whole number other than zero.
- Set Back to Zero: Next, change these values back to zero to complete the flattening process.
Changing Views Between 2D and 3D
To switch back and forth between 2D and 3D views in AutoCAD, you can:
Access the View menu and select 3D Views, where you can choose Plan View to see the current UCS from a 2D perspective.
- Alternatively, type PLAN in the Command prompt to return to a 2D view instantly.
For switching between graphics display styles, go to the Visual Styles option in the View menu and select either 2D Wireframe or 3D Wireframe.
FAQ
What happens to the original 3D object after flattening?
The original 3D object remains unchanged in the drawing. The flattening process creates a new 2D representation, allowing you to keep both versions.
Can the flattening command be used on multiple objects simultaneously?
Yes, you can select multiple objects for flattening at once, streamlining the process for complex drawings.
Is there a way to manually flatten without using the command?
Yes, as mentioned earlier, you can manually set Z values in the Properties Palette in AutoCAD LT or adjust them in other versions, allowing for flexibility in getting the desired 2D effect.
