# Mix Scalar

Node Description & Purpose:
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

Node Type: Function

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.