# Mix Scalar

The Mix family of nodes is used to blend or interpolate between the two input values. If the value coming from the node attached to the Mix controller input is 0 then the value of the Input node will be output. If the value coming from the Mix controller node is 1 then the value of the Input 2 node will be output. If the Mix controller value is somewhere between 0 and 1 then the output will be a blended combination of the two input values.

The inputs are mixed using linear interpolation according to the following formula:

Output **=** Input **+** Mix controller value **x** (Input 2 **-** Input)

Mix colour mixes colours on a component-wise basis. The Mix controller can be either a colour or a scalar:

Output.red = Input.red **and** Input 2.red **mixed by the** Mix controller's red value

Output.green = Input.green **and** Input 2.green **mixed by the** Mix controller's green value

Output.blue = Input.blue **and** Input 2.blue **mixed by the** Mix controller's blue value

Mix vector mixes vectors on a component-wise basis, but the Mix controller value is always converted to a scalar if it is not already a scalar:

Output.x = Input.x **and** Input 2.x **mixed by the** Mix controller's scalar value

Output.y = Input.y **and** Input 2.y **mixed by the** Mix controller's scalar value

Output.z = Input.z **and** Input 2.z **mixed by the** Mix controller's scalar value**Settings: **

**Input 2**: This is where you specify the node for the Input 2 value.**Mix controller**: This is where you specify the node that is used to control the mixing between the Input and Input 2 values. If you do not specify a mix controller, a value of 0.5 is used.

**Error conditions**

- It is an error for there to be no
**Input**value. In this case 0 is output for scalars, and colours and vectors will have all their components set to 0. - It is an error for there to be no
**Input 2**value. In this case the**Input**value is output. - If there is no
**Mix controller**node attached then a value of 0.5 is used for mixing the input values.

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.