# Primitives In 2D computer graphics, primitives are * points * lines and line segments * planes * circles and ellipses * triangles, 'quads' or arbitrary polygons * spline curves In 3D computer graphics, primitives are simple geometric shapes such as a * cube * cylinder * sphere * cone * pyramid * torus * triangle / polygon mesh They are the building blocks for many other shapes and forms. --- # 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://apertus.gitbook.io/vr/introduction/definitions/primitives.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.