3.7. DS BC Curve Colour Gradient

Allows an object to change colour based upon value applied to a colour gradient. Uses an Unreal Colour Curve Asset, allowing reuse of colour gradient and fine tuning.

This behaviour allows the use of an Unreal Colour Curve asset as the basis for the gradient, edited through the UE native colour curve editor. The curve allows more complex non-linear gradients and the curve asset can be reused for other object gradients. For example, the curve can be set up to smoothly interpolate between colours or to have hard stops to create a banding effect such as for traffic lights and other discrete data.

Alternatively, the more limited Colour Gradient behaviour allows direct creation of the colour gradient in the details panel, which allows you to quickly make simple gradients with equal intervals between the colour stops.

Datasculpt provides a small library of example curves in the Datasculpt Content > Resources > Materials > Curves Folder. You can duplicate and edit these to create your own colour curves.

Step-By-Step: Curve Colour Gradient Setup

1. Pre-requisite: You have added the component and set up the common behaviour parameters
2. Click the DS BC Curve Colour Gradient component
3. In the Data-Driven Behaviours section find Colour Curve, click the dropdown none and select a Colour Curve from the list.
   

Step-by-Step: Editing a Colour Curve

1. To edit the selected colour curve, double click the thumbnail image of it in the same section. This will open the Unreal Editor’s Curve window. Here you can see the RGBA channels spearated into graphs, and modify them accordingly.

!Important: There must be the same number and position of Keys in each channel or the colour curve will not work as expected with the DS BC Curve Colour Gradient behaviour. So if you create a new key for the Blue channel, you need to create keys at the same point for the Red, Green and Alpha channels.