Unreal Engine 4 Scripting with C++ Cookbook

Shader parameters and Material instances

A parameter to a shader is going to be a variable input to that shader. You can configure scalars or vectors to be used as input parameters to your shader. Some materials within UE4 come preprogrammed with material parameters exposed.

Getting ready

In order to set up a parameter to a shader, you first need a shader with something that you want to modify with a variable. A good thing to modify with a variable is the suit color of a character. We can expose the color of the suit as a shader parameter that we multiply suit color by.

How to do it...

1. Construct a new Material.
2. Within the Material, create a VectorParameter. Give the parameter a name, such as Color. Give it a default value, such as blue or black.
3. Close ...