CosineGradient is a small package for generating cosine-based gradients in Unity.
The idea of cosine-based gradients is based on an article written by Íñigo Quílez. See the original article for further details.
Download and install the unitypackage.
A CosineGradient object can be created from the Create menu (Create -> Cosine Gradient).
The coefficients of CosineGradient can be interactively edited on the inspector.
There is just a single method in the CosineGradient class -- Evaluate returns a color value at a given point in a gradient.
The editor preview shader can be referred as an example of evaluating a gradient in a shader. Note that the coefficient vectors (_CoeffsA/B/C/D) should be given from a script.