Objects and methods defined at base level

Developers of PyVisi renderer modules need to provide the classes, subclasses and methods described below. They need to be defined with stub classes or methods even if that functionality is not supported by the rendering backend. An error or warning message should be given if the user tries to call these null methods or classes, however they need to be there for completeness.

The most up to date and complete version of this information is contained on the PyVisi web site under the documentation page, and then the API link.