What is AutoCAD 3D

AutoCAD 3D modeling includes 3D solids, surfaces, meshes, and wireframes.

Types of 3D models

There are several types of 3D modeling available in AutoCAD. Each of these 3D modeling technologies offers different capabilities.

  • Working with wireframes is useful for initial design variations and as reference geometry, and serves as a 3D framework for subsequent modeling or modifications.
  • Solid modeling is more efficient to use, easy to use for combining primitives and extruded profiles, and provides mass properties and section planes.
  • Surface modeling provides greater control over curved surfaces for precise editing and analysis.
  • Mesh modeling offers freeform shapes, convolution, and smoothing.

A 3D model can contain combinations of these technologies, and you can convert between them. For example, you can convert a three-dimensional pyramidal solid to a 3D mesh to perform mesh smoothing. You can then convert the mesh to a 3D surface or back to a 3D solid in order to benefit from the corresponding modeling functions.

View 3D models

The most useful command to dynamically display 3D models is 3DORBIT.

In addition to changing views, you can right-click to bring up a context menu that has many options. The main options include the following:

  • Switch between different visual styles, such as B. Conceptual, Realistic and X-ray
  • Switching between parallel and perspective projection
  • Choosing between predefined views, for example top, front

Applying 2D and 3D AutoCAD commands

Most AutoCAD commands for 2D operations can be applied to 3D models. For example, you can use the ROTATE command to rotate a 3D solid about an axis that is parallel to the Z axis of the UCS. To rotate the model around a different axis direction, you need to change the direction of the Z-axis of the UCS.

There are also commands specifically for the 3D environment such as B. ROTATE3D, which displays a gizmo for improved rotation around the main axis.

The easiest command to start with is ROTATE due to familiarity, but the choice of commands will depend on conditions and your needs.