# IExistentAlignmentSubject ## Overview The ExistentAlignmentSubject interface plays a crucial role in the Existent framework by defining a contract for objects that can be used as subjects or references in spatial alignment process. **Key Features** * Interface Definition: Serves as a blueprint for any object that needs to participate in alignment calculations, ensuring they provide necessary spatial data in a consistent format. * Sample Validity: Objects implementing this interface must provide a method to determine if the current transform sample is valid. This allows alignment processes to ignore samples that are not suitable for calculations, such as when tracking data is lost or inaccurate. * Transform Sampling: Requires the implementation of a method to obtain the object's current transform. This transform is used in alignment calculations to determine the spatial relationship between the subject and the reference object. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.existent.com/documentation/v0.0.1/resources/classes-components/iexistentalignmentsubject.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.