The Subtract family of nodes allow you to subtract the colour/scalar/vector coming into the Input by the color/scalar/vector coming into Input 2. The subtraction is component-wise, for example with a colour :
Input.red - Input 2.red
Input.green - Input 2.green
Input.blue - Input 2.blue
All nodes in this family have just the one setting, which lets you choose a node for Input 2.
- Name: This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Subtract vector nodes in a project.
- Enable: When checked, the node is active, and when unchecked the node is ignored.
- Input 2: This is where you specify the node for the Input 2 value.
A scalar is a single number. 1, 200.45, -45, -0.2 are all examples of scalar values.
A vector is a set of three scalars, normally representing X, Y and Z coordinates. It also commonly represents rotation, where the values are pitch, heading and bank.
A single object or device in the node network which generates or modifies data and may accept input data or create output data or both, depending on its function. Nodes usually have their own settings which control the data they create or how they modify data passing through them. Nodes are connected together in a network to perform work in a network-based user interface. In Terragen 2 nodes are connected together to describe a scene.