Multiply Complement Colour
Overview
The Multiply Complement family of nodes allow you to multiply the colour/scalar coming into the Main Input by the complement of the color/scalar coming into Input 2.
The complement of a component value can be derived by subtracting the component value from the maximum possible value. For example, the pixel values in a greyscale image range from 0 - 255. The complement of a pixel value of 100 is 155. Likewise the complement of a pixel value of 0 is 255, and a pixel value of 255 is 0.
The multiplication is component-wise, for example with a colour:
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Main Input.red multiplied by the complement of Input 2.red
Main Input.green multiplied by the complement of Input 2.green
Main Input.blue multiplied by the complement of Input 2.blue
In the examples below, this image is used by the Image Map shader assigned to the Multiply complement colour’s Main input:
This example illustrates the effect of assigning greyscale colour values to Input 2 of the Multiply complement colour node. The complement of black is white, so there is no change to the value assigned to the Main input, whereas the complement of white is black, which results in black as the output. Grey values between white and black darken the values assigned to the Main input.
This example shows the effect of assigning red, green, or blue values to Input 2 of the Multiply complement colour node. Where the component values from the Main input and Input 2 are the same, black is the result.
This example shows the effect of assigning secondary colours, yellow, magenta, or cyan to Input 2 of the Multiply complement colour node. Where the component values from the Main input and Input 2 are the same, black is the result.
In the examples below, this image is used by the Image Map shader assigned to the Multiply complement colour’s Main input
This example illustrates the effect of assigning greyscale colour values to Input 2 of the Multiply complement colour node. The complement of black is white, so there is no change to the value assigned to the Main input, whereas the complement of white is black, which results in black as the output. Grey values between white and black darken the values assigned to the Main input.
This example shows the effect of assigning red, green, or blue values to Input 2 of the Multiply complement colour node. Where the component values from the Main input and Input 2 are the same, black is the result.
This example shows the effect of assigning secondary colours, yellow, magenta, or cyan to Input 2 of the Multiply complement colour node. Where the component values from the Main input and Input 2 are the same, black is the result.
Settings:
- Name: This setting allows you to apply a descriptive name to the node, which can be helpful when using multiple Multiply Complement Colour nodes in a project.
- Enable: When checked, the node is active and the multiplication operation will take place. When unchecked the values assigned to its Main Input, if any, are passed through, otherwise a value of 0 is passed through.
- Input 2: The component values from the shader or function nodes assigned to this setting are multiplied with those from the Main Input. When nothing is assigned, the Main Input values, if any, are passed through. If the Main Input is unassigned, the output from the node is 0.