DayBRIGHT: Gradient Sampling

One of the core concepts of the DayBRIGHT project that I am developing over this semester is to enable the ability to drive HDR lighting over time using a variety of methods - the first of which is using a simple color gradient.

For every frame to be rendered, a copy of the core HDR image is created, then a color overlay operation is applied to that copy - with the color applied being the current sample value of the gradient. This relationship is graphically represented below:


Fig 1.1: Graphical example of gradient sampling applied to image