Predefined Functions – red

Function name: red – Return red component
Synopsis: red(c)

Input data type Output data type
color real


This function takes a color variable as input and returns the red part of the color. Normally the red part of a color is between 0 and 1. Colors can be created by using one of the color creation functions:

Internally colors are stored in RGBA format, thus this function is fast as it only needs to return one of the stored components of the color.