BasicEnvelope

BasicEnvelope

BasicEnvelope is the simplest implementation of the Envelope interface. It should only be used for extension by other envelopes or envelope wrappers.

You pass it an envelope expression string, where frame_index is the frame.
You also need to provide a Loop, the property type to affect, its completion, and may pass nested envelopes.
If you pass any nested envelopes, you may use them in your expression by adding @ENV_X@, where X is the index of the nested envelope, starting from 0.

For more commonly used envelope types, see LinearEnvelope and Envelope Wrappers.