Otsemodelleerimine

Otsemodelleerimine, also known as direct modeling, is a CAD (Computer-Aided Design) modeling technique that allows users to directly manipulate geometry without relying on a history-based parametric feature tree. In this approach, design changes are made by directly pushing, pulling, or moving faces, edges, and vertices of a 3D model. This contrasts with traditional parametric modeling, where changes are made by editing underlying features in a sequential order, which can be cumbersome and prone to errors if the feature tree is complex or has dependencies.

The primary advantage of direct modeling lies in its flexibility and speed, especially for tasks like concept design, design modification, and working with imported geometry. It simplifies the process of making quick edits and exploring different design iterations without the need to understand or rebuild the original design intent. This can be particularly beneficial when dealing with complex assemblies or when receiving designs from external sources that may not have a well-defined feature history.

While direct modeling offers significant advantages in certain scenarios, it's important to note that it often lacks the robust design intent capture and associativity found in parametric modeling. Parametric models are designed to automatically update related features when a parameter is changed, ensuring design consistency. Direct modeling typically requires more manual intervention to maintain such relationships. Many modern CAD systems offer hybrid approaches, allowing users to leverage both direct and parametric modeling techniques within the same environment, providing a comprehensive solution for various design challenges.